Powertool Systems - psm-muenchen.de

Operating Instructions 

Spare Parts List PSM21 

Electric screw drivers /// Pneumatic screw drivers /// Torque measurement systems /// Screw feed systems 

Support arms /// Drilling and thread-cutting technology /// Transmission technology

PSM21 

CE Declaration of Conformity 

PSM Line pneumatic feed unit 

for low-cost industrial automation 

Powertool Systems 

Drilling and thread-cutting technology 

We, PSM Powertool Systems GmbH - Martinsried-Deutschland -, accept sole responsibility for the declaration that the product 

to which this declaration refers meets the regulations of Directive 98/37 EC. 

Tool identification 

Type Type PSM21 drill feed and thread-cutting unit 

Order code 

Serial number 

Tool test report 

True running of the 

spindle 

Drill feed force, 

measured at 6.3 bar 

Idle-running speed (*) 


Noise level (**) 


[mm] 

[N] 

[min -1 ] 

[dB(A)] 

PSM 1 - - - - - 

Month Year Batch Batch number Customer no. 

0% stroke 50% stroke 100% stroke 

Stalling torque [Nm] when pressure is correctly set [bar] 

bar 0,5 1 2 3 4 5 6 

Nm 

(*) When new, the motor has a 15 to 20% lower idle-running speed. Given an appropriate running-in period, the actual speed approaches the nominal speed. (**) 

Measured with a standard sintered bronze sound absorber fitted. With the aid of an appropriate air extraction hose and connected filter-muffler (Art.-No. AMC520- 

F06B) the noise level can be greatly reduced. 

The following persons confirm the correctness of the above information: 

Martinsried, dated 

Robert Manglitz Piotr Gela 

PSM Powertool Systems Manglitz GmbH, Fraunhoferstrasse 11a, 82152 Martinsried, Germany, Tel. +49 (0)89 899621-0, Fax +49 (0)89 899621-30 

www.psm-muenchen.de 

/ 

- Page -

Index 

General 

Design 

General technical information 

Summary of the operating functions 

Construction 

Notes on use as a screw-driver unit 


Ordering inform. Order code for PSM 1 drill feed unit 6 

Dimensions 

PSM21 

Tool adaptions 

Dimensions of the drill feed unit with 40 mm feed length 


Scale drawings of the tool adaptions 

Order code for the tool adaptions 

Control Examples of a pneumatic control 9 

General remarks 

on operation 

Special notes 

on function and 

operation 

Service 

Spare parts and 

drawings 

Transport and handling 

Installation of the tool 

Commissioning the tool 11 

Maintenance and use of the tool 

Disposal of used appliances 

Packaging materials 

Statutory provisions 

Functional description 13 

Assembly instructions 

Compressed air connections 

Lubrication 

Stroke setting 

Setting the optional proximity switches 

Setting the speed of the working stroke 

Setting the speed of the rapid stroke and return stroke 

Start-up 

Repairs 

Maintenance 

Assembly drawing 

Exploded assembly drawing 

Spare parts list 18-19 



4 

5 

7 

8 

10 

12 

14 

15 

16 

17

PSM21 



Instructions for the PSM21 drill feed unit 


- Summary of the operating functions - 

The compact and light design makes this feed device an ideal component of a specialised mechanical engineering unit. The 

lightest version, weighing just kg is ideally suited to use in robots. Robust drive technology and precise bronze/steel plain 

sleeve bearings guarantee durability and production accuracy. 

• Compact modular construction system 

• Motor output: 0.30 kW 

• Drilling through up to 6 mm of mild steel 

• Threads from M2 to M8 can be cut in mild steel 

• Stall torque shut-off screwdriver from 0.3 to 12.6 Nm 

• Standard feeds: 40 and 80 mm 

• Braking paths: 12.70, 25.40, 50.80 and 76.20 mm 

• Speeds from 600 to 29,000 rpm 

• Final position request with magnetic field sensors (optional) 

• Installation of multiple spindle cutting heads 

• Installation of thread-cutting heads 

• Low weight (ideal for robot use) 

• Very small dimensions 

• Spindle running accuracy: 0.02 mm 

• Drilling depth accuracy: 0.01 mm 

• Air consumption: 5.4 l/sec. 

• Operating pressure: 6.3 bar 

Summary of the operating functions 

The stroke setting screw 

is fastened by means of 

a grub screw with a brass 

head. Before the overall 

stroke length is set, this 

screw must be undone with 

an Allen key. 

The braking rate is set using 

the internal hydraulic brake 

with a slotted screwdriver. 

The air outlet sleeve should 

be removed first to improve 

accessibility. 

The compressed air connections 

are placed centrally 

on the rear. A hose 

of 6 mm external diameter 

should be used for the 

prestroke and return stroke 

and a 10-mm hose for connecting 

the motor. 

PSM21 with 80 mm feed length 

The overall stroke length is 

set with the stroke setting 

screw. This adjusting screw 

has a fine pitch thread with 

a 1 mm pitch. The feed 

length can thus be adjusted 

very accurately. 

The prestroke and return 

stroke speed can be set 

using exhaust throttle. The 

air outlet sleeve should be 

removed first to improve 

accessibility. 

The motor exhaust hose is 

fitted as a standard with 

a 3/4-inch thread. Either 

a sound absorber can be 

mounted, or an exhaust 

hose fitted: e.g. in a filter 

sound absorber. 

PSM21 with 40 mm feed length 

The braking path (working 

stroke) is set by means of 

the adjusting screw. This 

is fitted with a Long-Lok 

thread-lock to prevent it 

being displaced during operation. 

Optionally, limit switches 

can be mounted on the 

sensor bar. These can be 

slid along the bar. There are 

two types of limit switch: 

pneumatic and electrical 

signal. 

The drill feed unit can be 

fastened from above or 

from below. A keyway is 

provided for perfectly aligned 

assembly. Besides this, 

the unit can also be fixed 

with alignment pins. 



- Page 4 -

PSM21 

Construction of the PSM21 



Construction of the PSM21 

- Notes on use as a screw-driver unit - 

The compact construction of the PSM 1 makes it possible to integrate drive, feed and braking units in a very small space. 

With a width of 40 mm, a height of 100 mm and a weight of approx. kg, the PSM 1 is the smallest and lightest drill feed unit 

available on the market. It is thus an ideal component in specialised mechanical engineering applications, and is excellently 

suited for use on robot arms because of its low weight. 

Motor exhaust 

Compressed air 

supply for return 

stroke 

Compressed air 

supply drive unit 

Attachment bar 

for requesting final 

position 

Notes on use as a screw-driver unit 

Magnets for 

requesting final 

position 

Feed cylinder 

Compressed air supply 

for prestroke 

Hydraulic brake 

(working stroke) 

Stroke-setting spindle with integrated 

adjusting screw for the braking 

path 

Drive unit (motor and 

transmission) 

Mounting flange 

This drill feed unit can be used for drilling, cutting threads and screw fastening. In screw fastening aplications, the unit is 

used as a stall torque shut-off screwdriver or as a screwdriver with air switch-off. A pneumatic control for switch-off the air 

supply can be supplied on demand. When using it as a stall torque shut-off screwdriver, it is important that the inlet pressure 

and volume flow (drive unit compressed air supply) be kept constant with a precision pressure controller. If this is the case, 

you will receive very accurate repeat torque accuracy, comparable with that of a mechanical cut-out coupling of an electric 

or pneumatic screwdriver. The decisive advantage is that with the PSM 1, you now have a screwdriver unit with integrated 

feed. The use of Code 5 with the tool holder option (sliding spindle with a 1/4-inch, hexagonal quick-action chuck) is recommended. 

Here, the sliding spindle is used to insert the screw bit into the chuck. This means the PSM 1 - can also be used as 

a screwdriver system in addition to its main purpose as a drill feed unit in an automatic screw-fastening unit. A maximum 

torque of approx. 13 Nm can be achieved. The precise inlet pressure acts in proportion to the stalling torque. 



- Page 5 -

PSM21 Ordering information 



Order code for PSM21 drill feed unit Spare parts Order 

PSM21 - - - - - 

Bohr- und Schneidleistung (Richtwerte) 

Alu Stahl 

1,5 1 

3,5 2 

5 3 

6 4 

7/M4 5/M3 

8/M6 6/M5 

M8 M6 

M10 M8 

Final position request 

0 Without request 

1 Pneumatic signal 5035-070-1 

2 Electrical signal 5035-070-2 

Tool holder 

1 Toothed ring drill chuck 0...6.35 mm (standard) 5035-052-1 

2 Collet chuck 1...10 mm (state ø) 5035-052-2 

3 Thread-cutting head (max. M6, 2000 min-1) 5035-052-3 

4 Quick-action chuck 1/4-inch, hexagonal 5035-052-4 

5 Slide spindle quick-action chuck 1/4-inch, hexagonal 5035-052-5 

Braking paths/working stroke length max. [mm] 

0 Without braking unit (not for cutting threads) 

1 12.70 (1/2 inch) 5035-003-1/2 

2 25.40 (1 inch) 5035-003-1 

3 50.80 (2 inch) - not for 40 mm feed length 5035-003-2 

4 76.20 (2 inch) - not for 40 mm feed length 5035-003-3 

Overall stroke length max. [mm] 

1 40 (standard) 5035-000-40 

2 80 (standard) 5035-000-80 

3 120 (only on request) 5035-000-120 



Idle-running speed [min -1 ] 

0 29,000 (not with thread-cutting head) 5035-044-29000 




4 2,400 5035-044-2400 

5 1,000 5035-044-1000 

6 700 5035-044-700 

7 600 5035-044-600 



- Page -

PSM21 Scale drawings 


 

 

 

 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


 

 

 

 

 

 


 


 

 

 

 

 

 

 

 

 

 

- Page 7 -



PSM21 Dimensions and order code for tool adaptions 

Scale drawings of the tool adaptions 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Order code for the tool adaptions Spare parts Order 

PSM21 - - - - - 

Tool holder 



 

 

1 Toothed ring drill chuck 0...6.35 mm (standard) 5035-052-1 

2 Collet chuck 1...10 mm (state ø) 5035-052-2 

3 Thread-cutting head (max. M6, 2000 min -1 ) 5035-052-3 

4 Quick-action chuck 1/4-inch, hexagonal 5035-052-4 

5 Slide spindle with quick-action chuck 1/4-inch, hexa- 5035-052-5 

- Page 8 -

PSM21 Examples of a pneumatic control 

12 

2 

1 

7 

2 

9 10 

3 

2 

1 3 

12 

12 

1 

S 1 S 2 

I I 

2 

1 

3 4 

2 

3 

3 

1 

4 

1 5 

2 

1 

14 

6 2 

12 

12 

14 

1 2 

12 

1 3 

2 

1 

11 

1 3 

2 

1 

1 

3 

8 

13 

2 

12 

2 



1 

5 

PSM21 internal, components integrated 

No. Designation Function 

1 Cylinder, pneum. Feed 

2 Compressed air Transmission 

3 Exhaust throttle Feed rate 

4 Exhaust throttle Return stroke speed 

5 Cut-off valve Motor stop 

6 Impulse valve Control of the prestroke and 

7 OR valve Logic element 

8 Signal breaker Prestroke impulse 

9 Limit switch S1 Return stroke condition 

10 Manual control Reset to 0 stroke 

11 Manual key Start of drilling cycle 

12 Limit switch S2 Prestroke condition 

13 Manual control Main opening valve 

14 Maintenance unit Controllers/filters/lubricators 



- Page 9 -

PSM21 

Operating instructions 

- General remarks on operation - 



The operating instructions comply with the regulations contained in Directive 98/37/EEC. The appendix, in which the name 

and address of the manufacturer, as well as the description and technical tool data are listed, forms a standard part of the 

operating instructions. The operating instructions must be carefully kept at a place that is known to all users of the tool 

and which is easily accessible. Read the instructions carefully and ensure that all other operators of the tool read them 

before setting, conducting maintenance work, repairing or scrapping the tool. Always ensure that the operators have fully 

understood the information contained in the operating instructions and, where appropriate, have completely understood 

the symbols on the machine. Most accidents can be avoided when the following basic safety information from EEC Directive 

98/37, and the regulations on hand-held tools are followed. The regulations on the prevention of accidents valid in your 

own country must be observed and adhered to exactly. No inscriptions or stickers on the tool may be removed. This applies 

particularly for legally stipulated notices. 

Transport and handling 

On receipt make sure that the packaging is undamaged and that the tool does not bear any signs of transport damage. If 

necessary contact the PSM customer service. Please dispose of the packaging materials in a proper manner. If the tool is to 

be transported to another department at the factory or to another location, ensure that the tool and/or the accessories do 

not get damaged. Pack the tool appropriately. 

Installation of the tool 

The following remarks generally apply to the installation of compressed air tools. Always verify the compressed air connection 

pressure: Compressed air tools have their ideal range of performance at an inlet pressure of .3 Bar (90 P.S.I.) at the 

tool in operation.This value should not be exceeded. If the pressure at the compressed air connection is higher than the 

tool‘s operating pressure, insert a pressure regulator in between. During installation always provide easily accessible supplementary 

fittings, to separate the tool from the energy source. Only use clean and dry compressed air (dew point between 

+ °C and +10°C), to protect the tool from damage, silting and rust formation. It is strongly recommended that an air service 

unit be installed between the compressed air network and the tool‘s connection coupling. Most PSM compressed air tools 

are designed for operation with oil-less compressed air. The use of non-oiled compressed air reduces the service life of the 

rotor blades significantly. If you do decide on oiling, then filter-regulator-lubricator (FRL) power units should be used. Only 

employ a highly viscous, high-grade mineral oil that is free of resin and acids. If an excessive amount of oil is used, oil will 

find its way into the surrounding air as an oil mist, contaminating the workplace and harming the operator. In order to avoid 

this oil mist formation, the exhaust air from the compressed air tool must be guided into an appropriate oil mist separator. 

If this is not possible, use the tool in a very well ventilated environment. Contact a doctor immediately if any oil should get 

into the eyes or be accidentally swallowed. Persons who regularly deal with lubricants must wear suitable protective clothing 

made of materials impervious to oil. Remove any clothing that has been contaminated with oil. If the technical parameters 

are not monitored (pressure of the compressed air supply, internal diameter of the connecting hose, etc.) damage may occur 

to the tool and the operator may be put at risk. Before the tool is connected, remove any dirt and condensation from the 

hose and the threaded coupling. Make sure that any connecting pieces are fitted correctly. The use of a pivoted connection 

is recommended so that the connecting hose cannot get damaged or come off when the tool is rotated. The hose must be resistant 

to oil and friction, and be designed to withstand the tool‘s operating pressure. Do not pull the tool along the ground 

by the hose. Always remove the hose from the tool before opening the compressed-air line. Do not use any hoses that are 

damaged, worn or otherwise of poor quality. Always check the hoses visually before use: Damage and injury may occur if a 

hose bursts. Please pay attention that compressed air hoses are correctly put away after use. They must not be stored near 

to sources of heat or be subjected directly to sunlight. Always ensure that the tool is separated from the compressed air 

supply when it is no longer in use when accessories are replaced in order to adjust, service or take apart the tool. Remove 

any compressed air tools that do not function from the workplace or make it clear that they do not work by clearly labelling 



- Page 10 -

PSM21 

General remarks on operation of 

compressed air tools 



them. In the case of screw-tightening systems that are equipped with several compressed air motors, provide air columns of 

adequate capacity near the motors. Avoid using quick connections with these systems because they can significantly reduce 

the air-flow. Depending on the type of tool used, the instructions contained in the „Special notes on function and operation 

of the PSM 1“ also apply in addition to the general instructions. 

Commissioning the tool 

The following generally applicable notes must be followed when using a compressed air tool. For reasons of safety, all tools 

and connecting pieces and accessories may only be used as properly intended and only with the safety devices provided 

by the manufacturer. See also the definition of proper use in the section on „Specific notes on ...“. Any retrofitting of the 

tool or its accessories must be approved by the manufacturer. Should there be any doubt about the safe use of a tool or its 

accessories, do not connect and start up the tool under any circumstances before you have discussed your doubts with the 

manufacturer. Compressed air tools may generate vibrations. Frequent exposure to strong vibrations over a long period of 

time can cause damage to health, especially to the hands and arms. The effects are still not known in detail and depend on 

numerous factors, such as the nature of the work concerned and the tool, the physical constitution of the operator, as well 

as the duration and nature of the exposure. In cold regions, gloves should be warm to keep the hands as warm as possible. 

The use of compressed air tools themselves and their working environment results in high noise levels. Ear protection must 

be worn when such high noise levels exist. The technical regulations and legal requirements applicable in the country where 

it is to be used should be observed. See the section on „Other safety information“ for further informtion on vibrations and 

noise levels. The user of the tool or the staff at the factory must wear protective goggles, ear muffs and plugs, safety shoes 

and gloves when working conditions call for it or the accident prevention regulations require it. The tools are not protected 

against contact with electrical current. They must not be used in working spaces where there is a danger of explosion if the 

manufacturing procedure may set off an explosion. Make sure that accessories are mounted in a proper manner and safely, 

and switch the control systems to „Off“ before activating the compressed air supply. The tool‘s starting mechanism must 

always function correctly. The safety devices and the tool‘s starting mechanism must not be circumvented. If the compressed 

air supply should fail, the starting mechanism must be stopped immediately. Moving parts must not be touched at any time 

if this is not expressly call for before the tool has been finally cut off from its energy source. The tool must always be kept 

clean and dry to ensure that it can be gripped safely. If an accessory component should break, fragments may be expelled at 

high speed. Unintentional movement of the tool may cause injury to the operator. When lifting the tool or putting it down, 

make sure that it is not inadvertently switched on. Only use the tool in safe operating positions. Particular caution is called 

for when working in unsuitable positions. Make sure that long hair or loose clothing does not get caught or entrained. Heavy 

tools must be hung on a spring balancer or similar device to avoid the operator being subjected to a heavy physical burden. 

The tool must always be well secured. Do not clean, oil or grease any moving parts by hand. Take particular care that the air 

discharge opening does not become a source of danger. This applies particularly when the air discharge openings are blocked 

(e.g.: because of rust, mounted cover caps, etc.). Do not put the tool to one side as long as the accessory is in motion, 

and do not switch on until it has been picked up. The tool and accessory must come to a complete standstill before it can 

be brought to another workplace. Depending on the type of tool used, the instructions contained in the „Special notes on 

function and operation of the PSM 1“ also apply in addition to the general instructions. 



- Page 11 -

PSM21 

Maintenance and use of the tool 

General remarks on operation of 

compressed air tools 



Service and maintenance work on the compressed air tools must be carried out correctly by experienced and skilled employees. 

Cleaning and checking the tool every 1000 operating hours is recommended. If any vibrations, unusual noises, changes 

in speed or irregularities are noticed, do not continue using the tool and switch it off. It makes sense to clean the filter 

element in the tool‘s compressed air connection to avoid the later becoming blocked and thus preventing a reduction in the 

motor output. If the tool does not start after a long period at a standstill, place a few drops of oil (Art. No. 99011001) in the 

compressed air connections and repeat the start procedure. Always cut off the tool from the source of compressed air before 

any accessories are replaced, serviced or dismantled. Following every intervention for maintenance, test the tools in order 

to check their rate of advance and functionality. The spare parts list is sent separately for general information. It is only 

intended for the staff responsible. Only use original PSM spare parts. (The guarantee rights become invalid if components are 

used that are not original parts). Repairs that are not conducted correctly may cause accidents. In order to avoid accidents 

as a result of any unsuitable applications and to enjoy the best performances from the tool and a comprehensive customer 

service, repairs or maintenance work must always be conducted by the PSM Technical Customer Service, Fraunhoferstrasse 

11a, D-8 15 Martinsried – or by an authorised service centre in your own country. The PSM Technical Customer Service can 

also organise courses on the correct use and proper conduct of maintenance and repairs of PSM products on request. 

Disposal of used appliances 

This compressed air tool is made largely of aluminium, steel, cast iron, brass and plastic. All the components can be easily 

disposed of, and they are neither environmental nor health hazards. Sort the individual parts according to their materials for 

recycling or separate disposal. Where applicable, PSM will take back individual parts that have been dismantled and sorted 

according to their materials. 

Packaging materials 

PSM products are packed in maerials made from recovered paper and plastics, which can be recycled. The packaging material 

meets the regulations of European Directive 94/ /EEC. 

Statutory provisions 

1.7.1. Richtlinien Directive 98/37 EC - Safety of machinery. 1.7. . Technische Normen EN 292-1:1991 Safety of machinery. Basic concepts, 

general principles for design. Part 1: Basic terminology, methodology. EN 292-2:1991 Safety of machinery. Basic concepts, principles for 

design. Part : Technical principles and specifications. EN 792:2000 Hand-held non-electric power tools. Safety requirements. Part 1- 1 . 

EN 12096:1997 Mechanical vibration - Declaration and verification of vibration emission values. EN 28662-1:1992 Hand-held portable power 

tools - Measurement of vibrations at the handle. Part 1: General. EN ISO 8662-4:1995 Hand-held portable power tools - Measurement of 

vibrations at the handle. Part 4: Grinders. EN ISO 8662-7:1997 Hand-held portable power tools - Measurement of vibrations at the handle. 

Part 7:Wrenches, screwdrivers and nutrunners with impact, impulse or ratchet action. EN ISO 8662-8:1997 Hand-held portable power tools 

- Measurement of vibrations at the handle – Part 8: Polishers and rotary, orbital and random orbital sanders. EN ISO 8662-13:1997 Handheld 

portable power tools - Measurement of vibrations at the handle. Part 13: Die grinders. EN ISO 3744:1995 Acoustics.Determination 

of sound power levels of noise sources using sound pressure. Engineering method in an essentially free field over a reflecting plane. EN 

ISO 15744:2002 Hand-held non-electric power tools. Noise measurement code. Engineering method (grade ). EN ISO 4871:1996 Acoustics 

- Declaration and verification of noise emission values of machinery and equipment. ISO 2787:1984 Rotary and percussive pneumatic tools. 

Performance tests. EN ISO 5349-1:2001 Mechanical vibration. Measurement and evaluation of human exposure to hand - transmitted vibration. 

Part 1: General requirements. EN ISO 5349-2:2001 Mechanical vibration. Measurement and evaluation of human exposure to hand 

- transmitted vibration. Part : Practical guidance for measurement at the workplace. ISO 5393:1994 Rotary tools for threaded fasteners. 

Performance test method. ISO 6544:1981 Hand-held pneumatic assembly tools for installing threaded fasteners - Reaction Torque and Torque 

Impulse Measurements. CR 1030-1:1995 Hand-arm vibration – Guidelines for vibration hazards reduction – Part 1: Engineering methods 

by design of machinery. CR 1030-2:1995 Hand-arm vibration – Guidelines for vibration hazards reduction – Part : Management measures 

at the workplace. 



- Page 1 -

Functional description 



PSM21 Special notes on function and operation 

Within the enclosure there are a double-acting compressed air cylinder (A), a sleeve (B), in which a compressed air drive 

motor (44, 43) is situated, as well as the motor cut-off valve (C). There are three compressed air connections on the rear. 

Connection (49) acts upon the compressed air motor, connection (50) acts upon the prestroke and return stroke. At the starting 

and end position, the motor supply air is closed by the internal motor cut-off valve (C). As soon as the connection (50, 

on the right) is activated and the compressed air cylinder traverses forward, the motor cut-off valve (C) will be opened after 

a stroke of mm and the motor will then start up. The sleeve now moves to the set drilling depth. By activating the connection 

(50, left) the sleeve will move to its final/starting position and the motor will be switched on. The overall stroke length 

is set with the stroke setting screw ( ), the length of the working stroke with the internal adjusting screw (13) in ( ). 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Page 13 -

Assembly instructions 

The PSM 1 is affixed by means of screwed on plates (Fig. 14.10). You can choose between: 4x M Allen screws, from above 

( .5 mm hole), . 4x M screws, from below (M thread). Spacings: see Sections (I) and (J). The surface must be clean and 

level. The parallelism of the sleeve to the enclosure and/or screwed-on plates is achieved by means of two feather keys. 

Alternatively, the PSM 1 can be pinned to the surface using 4 cylindrical pins (ø 4 mm). 

Compressed air connections 

There are three compressed air connections on the rear of the PSM 1 (Fig. 14.17): 1. compressed air motor connection (middle) 

for hose, with an external diameter of 10 mm, . connections (right and left) for the prestroke and return stroke for the 

hose with an external diameter of mm. Caution! When sizing the compressed air line, please ensure that the section 

of the line is large enough so that there is always a pressure of 5-7 bar at the air inlet of the PSM21 when the motor is 

running. The air consumption is 5.4 l/sec at .3 bar. 

Lubrication 

The motor and cylinder should be run with dry (DTP +3...+10°C), filtered (5 µm) and oiled air. You can find special and very 

interesting information on the subject of „Lubricating compressed air tools and transmissions“ at [www.psm-muenchen. 

de/psm_katalog/einzelstellenoeler_spl_ 007_10.pdf]. Caution! If you run the PSM21 free of oil, please make sure that 

the bladed shutter is 6-8 times higher, for instance. 

Stroke setting 

The overall stroke consists of the fast stroke and the working stroke (Fig. 14.11). The stroke is set with two screw-components. 

The screw-component ( , Fig. 14.12 and Fig. 14.13) is used to set the overall stroke. Caution! First unscrew stud screw 

(51, Fig. 14.14). By means of the stud screw (13, Fig. 14.12 and Fig. 14.16) set the fast stroke and/or the retarded working stroke. 

This adjusting screw has a Long-Lok ® thread-lock and must thus not be specially countered or secured. First tighten the 

stud screw again (51, Fig. 14.14). Once the stroke settings have been completed, the „optional“ proximity switches (Fig. 14.18) 

can be set up. 

Through hole 6,5 mm 

Pine hole Ø 4 mm 

Feather key 

Thread M6 

Fig. 14.10 Fig. 14.11 

Overall stroke Fast stroke Working 




Fig. 14.12 Fig. 14.13 

Return 

Prestroke 

Motor connection 

Fig. 14.14 Fig. 14.15 Fig. 14.16 Fig. 14.17 Fig. 14.18 



- Page 14 -




Setting the optional proximity switches 

The limit switches can be supplied in two versions. Article numbers 5035-070-1 (pneumatic signal) and 5035-070-2 (electrical 

signal). These proximity switches are set up once the limit settings have been completed. To this end, they are pushed onto 

the pre-mounted bar (Fig. 15.10). Pos. front: Move the sleeve to its rear final position and push the limit switch into position 

until an electric or pneumatic signal is given. Rear pos.: Move the sleeve to its front final position and push the limit switch 

into position until an electric or pneumatic signal is given. 

Setting the speed of the working stroke (braking rate) 

The speed of the working stroke is set with the installed hydraulic brake. First, the exhaust air pipe is removed (Fig. 15.11). 

Then, using a screwdriver (width of blade: ...7 mm) gradually set the feed rate by twisting it slightly to the left or the right 

(more slowly) on the visible brass component (Fig. 15.12) depending on the drill speed and the material being processed. 

Setting the speed of the rapid stroke and return stroke 

The fast stroke and return stroke are set at the fitted exhaust throttle (Fig. 15.13). Caution! The speed of the fast stroke 

is set with the „control air return stroke“ throttle. The speed of the return stroke is set with the „control air prestroke“ 

throttle (Fig. 15.14). 

Commissioning 

Before starting, ensure that the PSM 1 is screwed tight to the level, clean surface and that no objects can hinder the feed 

movement of the sleeve. The toothed ring drill chuck or collet chucks, etc. must be tightened. In addition, a protective device 

must be installed on the machine at the factory in order to avoid accidents. Please check whether the air pressure set is 

sufficient. Caution! When the compressed air motor is running, there must always be an air pressure of 6.3 bar. Please 

also check whether the lubrication for the compressed air motor is sufficient and that the compressed air is free of water. 




Return 

Prestroke 

Motor connection 

- Page 15 -

PSM21 Repair and maintenance 

Repairs 



Repairs are conducted by PSM employees or other authorised specialists. We support authorised specialists by sending repair 

instructions or support by telephone. Caution! As a basic principle, repairs within the warranty period are performed 

by PSM. 

Maintenance 

Visual inspection and cleaning should be performed at regular intervals. To make this easier, the enclosure must be dismantled 

from the base unit. After they have been removed, all the main groups will be open and able to be checked for signs 

of damage. The pictures below help how the enclosure is dismantled: 


Fig. 16.14 

[Fig. 16.10] Unscrew two screws (M6) on each of the two fixing 

plates. Caution! The plate is pinned. Knock it off, carefully 

and evenly. [Fig. 16.11] Take off the sensor bar fastening (2x M6 

each) and [Fig. 16.12] remove the sensor bar. [Fig. 16.12] Take off 

the exhaust air flange (2x M5) and [Fig. 16.13]. Caution! Do not 

misplace the O-rings. [Fig. 16.14] With one hand, grip the unit on 

the sleeve, with the other hand hold the enclosure tight and then 

pull the unit out of the enclosure. [Fig. 16.15] View of PSM21 without 

enclosure. 

Fig. 16.15 

Some machine components, usually sealing elements, are subject to high levels of wear. In order to avoid unplanned machine 

downtimes, these should be replaced at previously defined intervals, as a precaution and at the discretion of the operator. 

Parts subjected to wear and tear are listed below in a table. 

Order No. Description Function Clear sign of wear and defect 

5035-008 Wiper Sleeve guide protector Score marks on the sleeve, deterioration in guide characteris- 

5035-046 (2x) Guide strips Slideway bearing for the Noise levels increase during prestroke and return stroke 

5035-014 Gasket on bar Piston rod gasket Sleeve does not move back at all (or only with reduced force) 

5035-029 Piston lining Cylinder piston gasket Sleeve does not move backwards or forwards at all (or only with 

5035-027 Guide strips Guiding the piston in the Score marks on the inside surface of the cylinder, damage to 

5035-030 Gasket on bar Valve rod gasket Reduced prestroke force (or none at all) 

5035-040 Flat gasket Motor air gasket Motor does not switch off at the very last final position 

1008914 (4x) Rotor fins Motor transmission element Motor output falls, speed reduced 

1009879 Ball bearing Rotor bearing Abnormal motor noises, motor shutdown 

1007537 Ball bearing Rotor bearing Abnormal motor noises, motor shutdow 

5035-060 Set of wearing parts , contains all the parts subjected to wear and tear listed above 



- Page 1 -

PSM21 Drawings and spare parts list 

 

Assembly drawing 

 

 

 

 

 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Exploded assembly drawing 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

- Page 17 -




Item No. of Unit Designation Drawing No. Remark 

1 1,00 Unit ENCLOSURE 5035-001-40 40 MM STROKE 

1 1,00 Unit ENCLOSURE 5035-001-80 80 MM STROKE 

1,00 Unit END PLATE 5035-00 

3 1,00 Unit HYDRAULIC BRAKE 5035-003-1/ 1 .70 MM BRAKING PATH 

3 1,00 Unit HYDRAULIC BRAKE 5035-003-1 5.40 MM BRAKING PATH 

3 1,00 Unit HYDRAULIC BRAKE 5035-003- 50.80 MM BRAKING PATH 

3 1,00 Unit HYDRAULIC BRAKE 5035-003-3 7 . 0 MM BRAKING PATH 

4 1,00 Unit CARRIER PLATE 5035-004 

5 ,00 Unit DISK MAGNET 5035-005 

1,00 Unit STROKE SETTING SCREW 5035-00 -40 40 MM STROKE 

1,00 Unit STROKE SETTING SCREW 5035-00 -80 80 MM STROKE 

7 1,00 Unit FRONT PLATE 5035-007 

8 1,00 Unit WIPER SLEEVE 5035-008 

9 1,00 Unit GUIDE BUSH 5035-009 

10 1,00 Unit MOTOR ENCLOSURE 5035-010 

11 1,00 Unit SLEEVE 5035-011-40 40 MM STROKE 

11 1,00 Unit SLEEVE 5035-011-80 80 MM STROKE 

1 1,00 Unit HOLDER FOR MOTOR 5035-01 -40 40 MM STROKE 

1 1,00 Unit HOLDER FOR MOTOR 5035-01 -80 80 MM STROKE 

13 1,00 Unit BRAKE ADJUSTING SCREW 5035-013 M1 X5 -M/LONG LOK (STEEL BRONZE-FINISH] 

14 1,00 Unit GASKET ON BAR 5035-014 0X 9X ,8 (NBR) 

15 1,00 Unit PISTON ROD GUIDE 5035-015 

1 1,00 Unit O-RING 5035-01 33X1 (NBR) 

17 1,00 Unit O-RING 5035-017 9X1,5 (NBR) 

18 1,00 Unit VALVE ROD 5035-018-40 40 MM STROKE 

18 1,00 Unit VALVE ROD 5035-018-80 80 MM STROKE 

19 1,00 Unit PISTON ROD 5035-019-40 40 MM STROKE 

19 1,00 Unit PISTON ROD 5035-019-80 80 MM STROKE 

0 1,00 Unit PISTON 5035-0 0 

1 1,00 Unit AIR SUPPLY 5035-0 1 

1,00 Unit CYLINDER TUBE 5035-0 -40 40 MM STROKE 

1,00 Unit CYLINDER TUBE 5035-0 -80 80 MM STROKE 

3 1,00 Unit AIR OUTLET SLEEVE 5035-0 3-1- 

3 1,00 Unit AIR OUTLET SLEEVE 5035-0 3-1-3 

4 ,00 Unit SENSOR PLATE 5035-0 4 

5 1,00 Unit SENSOR BAR 5035-0 5-40 40 MM STROKE 

5 1,00 Unit SENSOR BAR 5035-0 5-80 80 MM STROKE 

1,00 Unit ADAPTER - „KOSTA“ / DRIVE 5035-0 



- Page 18 -


Item No. of Unit Designation Drawing No. Remark 

7 1,00 Unit PISTON GUIDE BELT 5035-0 7 X1.5X105 (PTFE) 

8 ,00 Unit O-RING 5035-0 8 4X1.5 (NBR) 

9 1,00 Unit PISTON LINING 5035-0 9 3X3 X .9 (NBR) 

30 1,00 Unit GASKET ON BAR 5035-030 1 x19x .3 (NBR) 

31 8,00 Unit ALLEN SCREW 5035-031 DIN91 /M5 X 1 STEEL, GALV. (8.8) 

3 1,00 Unit SOUND ABSORBER 5035-03 SINTERED BRONZE [3/4 INCH] 

33 7,00 Unit ALLEN SCREW 5035-033 DIN91 /M4X 0 STEEL GALV. (8.8) 

34 ,00 Unit ALLEN SCREW 5035-034 DIN91 /M5X 0-STEEL GALV. (8.8) 

35 ,00 Unit FASTENING PLATE 5035-035 

3 1,00 Unit FLANGE - CNTRL / EXHAUST 5035-03 

37 4,00 Unit THREADED ROD 5035-037-40 40 MM STROKE 

37 4,00 Unit THREADED ROD 5035-037-80 80 MM STROKE 

38 1,00 Unit VALVE PISTON 5035-038 

39 1,00 Unit SUPPORTING WASHER 5035-039 

40 1,00 Unit FLAT GASKET 5035-040 

41 1,00 Unit PRESSURE DISC 5035-041 



4 1,00 Unit ALLEN SCREW 5035-04 DIN91 /M .5X -V A 

43 1,00 Unit COMPRESSED AIR MOTOR 5035-043-XXX SEE SEPARATE SPARES LIST 

44 1,00 Unit COMP. AIR MOTOR / TRANSM. 5035-044- 9000 0.30 KW/ 9000 RPM 

44 1,00 Unit COMP. AIR MOTOR / TRANSM. 5035-044-5 00 0.30 KW/5 00 RPM 

44 1,00 Unit COMP. AIR MOTOR / TRANSM. 5035-044-3800 0.30 KW/3800 RPM 

44 1,00 Unit COMP. AIR MOTOR / TRANSM. 5035-044-3 00 0.30 KW/3 00 RPM 





45 1,00 Unit HOSE 5035-045-40 40 MM STROKE 4X .5X50-BLUE (PU) 

45 1,00 Unit HOSE 5035-045-80 80 MM STROKE 4X .5X85-BLUE (PU) 

4 ,00 Unit PISTON RING 5035-04 X1,5X3 (PTFE) 

47 1,00 Unit ANGULAR MALE SCREW JOINT 5035-047 M5-F/HOSE 4X ,5 

48 1,00 Unit STRAIGHT MALE SCREW JOINT 5035-048 M5-F/HOSE 4X ,5 

49 1,00 Unit STRAIGHT CONNECTION 5035-049 1/4INCH-F/HOSE 10MM 

50 ,00 Unit THROTTLE CHECK VALVE 5035-050 M5-F/HOSE MM 

51 1,00 Unit PRESSURE SCREW 5035-051 M5X8-M/BRASS HEAD 

5 1,00 Unit TOOTHED RING DRILL CHUCK 5035-05 3/8- 4/0- ,35 MM 

53 ,00 Unit STUD SCREW / PIVOT 5035-053 DIN915-M3X4 (A1A) 

54 4,00 Unit HEXAGONAL NUT 5035-054 DIN934-M4-STEEL GALV. 

55 4,00 Unit CYLINDRICAL PIN 5035-055 DIN7-3X14-M (A1A) 



- Page 19 -

Call us up ! 

Our hotline +49 (0)89 899621-15 

Copyright by PSM /// All rights reserved 

Illustrations are for information only and non-binding. We reserve the right to make technical changes. 

[Vers. 03/2008] Printed in Germany by KK-Druck, D- 82152 Martinsried 

PSM Powertool Systems Manglitz GmbH Fon +49 (0)89 899 1-0 RG: Munich local court Bank details Münchner Bank eG 

Fraunhofer Strasse 11a Fax +49 (0)89 899 1-30 HRB 10 533 Kto 93483 BLZ 701 900 00 

D- 8 15 Martinsried bei München www.psm-muenchen.de Ust.-Id-Nr. DE 15 183 511 BIC GENODEF1M01 

GF: Dipl.-Ing. Robert Manglitz info@psm-muenchen.de St.Nr. 143/173/307 4 IBAN DE9 701900000000093483

Powertool Systems - psm-muenchen.de

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