Tooling Systems

KM SYSTEM
Technical Information
KM Tooling
KM-LOC II Clamping Units
Operating Instructions:
STRAIGHT SHANK QC / R8 SYSTEMS DV SYSTEM CV SYSTEM BT SYSTEM HSK SYSTEM
All KM-LOC II Clamping Units utilize disc springs to develop the correct
tightening torque. This unique system eliminates the need for a torque
wrench to achieve proper clamping torque. The KM LOC II System
provides consistent clamping forces with designed life expectancy of
50,000 cycles.
KM-LOC II Locking Sequence
Always ensure that the KM cutting unit and clamping unit are free of dirt
and contaminants. Install the cutting head into the clamping unit. Note
the key relations of the male and female tapers. The flange face will
have about .040" (1,0 mm) stand-off from the gage face before lock up.
If the amount stand-off is greater than this, the unit is either error
proofed or has contaminants. Rotate the head 180 degrees for proper
"free state" stand off.
A wrench with proper size metric bit is then inserted into the cam
socket. Rotating the cam socket 145 degrees (clockwise) until a stop is
felt will lock the head into the clamping unit. There is a dimple on the
cam and on the clamping unit body which will be aligned when the
positive stop is reached.
KM-LOC II Unlocking Sequence
Remove chips or foreign material from around the cutting unit flange
and clamping body. Insert the metric bit into the cam and rotate
counterclockwise to unlock the unit. During the unlock procedure the
lockrod will make contact with the inside of the cutting unit (this could
feel like a positive stop), continue the counter clockwise direction until
the head physically moves from the gage face.
When a KM head is unlocked, the head will "bump off". The KM System
utilizes a 10:1 self locking taper which requires a mechanical release.
KM LOC II Activation Drive Size
KM System Size
KM32
KM40
KM50
KM63
WEDGE TIGHTENING
TORQUE
Catalog no. KM size Torque range
(ft-lbs)
Torque range
(Nm)
Drive Size
6 mm
8 mm
10 mm
10 mm
Wedge
Hex
Size
KM40CL2SR/L1260B 40 30-34 41 - 46 6mm
KM40CL2SR/L... 40 43-47 58 - 64 7mm
KM50CL2SR/L1675D
KM50CL2SR/L2575M
KM50CL2SR/L2075D
KM50CL2SR/L3275P
50 43-47 58 - 64 7mm
50 58-62 79 - 84 8mm
KM63CL2SR/L..... 63 58-62 79 - 84 8mm
COLLETS /
SLEEVES
INDEX TECHNICAL ACCESSORIES
Operating Instructions
Automatic Clamping System
The KM automatic clamping system uses a disc spring package to
supply force to the lock rod, which in turn drives the locking balls and
provides clamping force to the cutting unit. The mechanical advantage
of the clamping mechanism is designed specifically for a given spring
force to supply the proper clamping force. Once the cutting unit is
clamped in the KM automatic clamping unit, it is securely held in place
until it is released by applying a force to the end of the spring end cap.
In most cases this is accomplished by the use of a hydraulic cylinder.
KM automatic clamping units contain sealed coolant ports as well as a
system for distributing air through the unit. The function of the air is
twofold: air is used to clean the taper and face area during tool change;
air is also used as a method to detect an improper tool change. Air is
routed to the intersection of the taper and the face. If the faces of the
cutting unit and the clamping unit do not totally seat after a tool change,
the air will continue to escape and can be used to detect a tool change
fault. KM automatic clamping units are available in several
configurations for application on a wide variety of machines.
780
To place an order, contact Kennametal or your authorized Kennametal distributor, or visit www.kennametal.com.