PowerGrip® GT® Belt Drives
PowerGrip® GT® Belt Drives
PowerGrip® GT® Belt Drives
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Polyflex ® JB ® and Micro-V ® <strong>Belt</strong> Drive Selection Procedures<br />
How to Design Polyflex JB and Micro-V <strong>Belt</strong> <strong>Drives</strong>–continued<br />
Step 6 Determine the Minimum Installation<br />
and Takeup Allowances<br />
A. Find the recommended installation and takeup<br />
allowance in Engineering, Section V. Installation<br />
and Takeup Table 40 or Table 41 on Page 80.<br />
B. For optimum belt performance, the drive must<br />
have sufficient belt installation and takeup<br />
allowance. Tables 40 and 41 on Page 80 show<br />
DriveN Machine<br />
The machines listed below are representative<br />
samples only. Select the group listed below<br />
whose load characteristics most closely<br />
approximate those of the machine being considered.<br />
Agitators for Liquids<br />
Blowers and Exhausters<br />
Centrifugal Pumps & Compressors Display Equipment<br />
Dispensing Equipment<br />
Fans up to 10 Horsepower Instrumentation<br />
Light Duty conveyors<br />
Office Equipment<br />
<strong>Belt</strong> conveyors for Sand, Grain, Etc.<br />
Dough Mixers<br />
Fans - Over 10 Horsepower Generators<br />
Line Shafts<br />
Laundry Machinery<br />
Machine Tools<br />
Punches - Presses - Shears<br />
Printing Machinery<br />
Positive Displacement Rotary Pumps<br />
Brick Machinery<br />
Bucket Elevators<br />
Exciters<br />
Piston Compressors<br />
Conveyors (Drag-Pan-Screw)<br />
Piston Pumps<br />
Positive Displacement Blowers Textile Machinery<br />
Hoists<br />
Rubber Calendars - Extruders – Mills<br />
the required center distance movement to<br />
provide proper installation and takeup. However,<br />
if you have a fixed center drive, it also must<br />
have provisions for belt length adjustment. Use<br />
of idlers is the most common method to provide<br />
belt length adjustment with fixed center drives.<br />
See Engineering Section VI: Idler Usage on<br />
Page 80 and Section VII. Design of <strong>Drives</strong> With<br />
Idlers on Page 82.<br />
Table 36 – Gates Polyflex JB and Micro-V Service Factors<br />
DriveR<br />
AC Motors: Normal Torque, Squirrel Cage,<br />
Synchronous Split Phase<br />
DC Motors: Shunt Wound<br />
Engines: Multiple Cylinder Internal Combustion<br />
Intermittent<br />
Continuous<br />
Service Normal Service Service<br />
3-5 Hours Daily 8-10 Hours 16-24 Hours<br />
or Seasonal Daily Daily<br />
AC Motors: Normal Torque, Squirrel Cage,<br />
Synchronous Split Phase<br />
DC Motors: Shunt Wound<br />
Engines: Multiple Cylinder Internal Combustion<br />
Intermittent<br />
Continuous<br />
Service Normal Service Service<br />
3-5 Hours Daily 8-10 Hours 16-24 Hours<br />
or Seasonal Daily Daily<br />
1.0 1.1 1.2 1.1 1.2 1.3<br />
1.1 1.2 1.3 1.2 1.3 1.4<br />
1.2 1.3 1.4 1.4 1.5 1.6<br />
1.3 1.4 1.5 1.5 1.6 1.8<br />
Table 37 – Minimum Recommended Sheave Outside Diameters for General Purpose Electric Motors<br />
Motor rpm (60 Cycle and 50 Cycle Electric Motors<br />
Motor rpm (60 Cycle and 50 Cycle Electric Motors<br />
Motor 575 690 870 1160 1750 3450 Motor 575 690 870 1160 1750 3450<br />
Horsepower 485* 575* 725* 950* 1425* 2850* Horsepower 485* 575* 725* 950* 1425* 2850*<br />
1/2 - - 2.4 - - -<br />
3 4.8 4.1 3.2 3.2 2.6 2.6<br />
3/4 - - 2.6 2.4 - -<br />
5 4.8 4.8 4.1 3.2 3.2 2.6<br />
1 3.2 2.7 2.6 2.6 2.4 -<br />
7 1/2 5.6 4.8 4.7 4.1 3.2 3.2<br />
1 1/2 3.2 3.2 2.6 2.6 2.6 2.4<br />
10 6.4 5.6 4.7 4.7 4.1 3.2<br />
2 4.1 3.2 3.2 2.6 2.6 2.6<br />
15 7.3 6.4 5.6 4.7 4.7 4.1<br />
*These rpm’s are for 50 Cycle electric motors.<br />
The World’s Most Trusted Name in <strong>Belt</strong>s, Hose & Hydraulics.<br />
73
Change language