Rack & Pinion Systems

Medium-Soft Precision Rack & Pinion Drive Systems

Medium-Soft Precision Rack & Pinion Drive Systemsn

These systems utilize our our precision Planetary and Servo-Worm Reducers, to rigidly support and drive a hardened & ground pinion.  The rack used in these systems is Soft, which has a quality level of DIN 9 (~AGMA 9) and soft teeth.

These drives are perfect for a wide range of applications, including axis drives requiring good positioning & repeatability, traveling gantries & columns, pick & place robots, CNC routers and material handling systems.  Light loads and duty cycles can be easily handled with these drives.

Our Automatic Lubrication Systems are highly recommended for use with these drives, providing continuous grease lubrication to the rack & pinion tooth flanks to preserve the quality and lifetime of the gearing.

  • System Precision
  • Right-Angle System
    Specifications
  • In-Line System
    Specifications

The system precision, including the pitch error and backlash, can be found below:

System Precision
Level:
Rack Type & Class: Rack Quality
Level:
Rack Pitch Error: Rack & Pinion
Minimum Backlash:*
Medium-Soft Soft
(BR)
DIN 9
(~AGMA 9)
< 0.150 mm
per meter
0.06 mm

*The rack and pinion backlash depends on the alignment of the rack to the linear guides.

ZTR

Our right-angle systems utilize our High-Torque (HT), High-Performance (HP) and Economy (E) Servo-Worm Reducers, which have backlash levels down to one arc-minute, to support and drive a hardened & ground pinion shaft.  These reducers are available in six sizes and have ratios from 4.75:1 to 52:1 (higher ratios available with planetary-worm reducers).  These reducers have options for keyed, compression or flanged outputs, which rigidly support our pinion.

The maximum drive force that each system can handle (with safety factor 1.0) is listed below; this should be compared to the application peak force, which can be calculated here, or by filling out our Application Sheet.

Please click on the table values for PDF specifications:

Reducer Size: Rack & Pinion
Module:
Pinion Shaft: # of Pinion
Teeth:
Maximum Drive
Force:*
Maximum Linear
Speed:
E Size 1 1.5 20.89.120 20 254 lb. 4,144 in/min
2 20.89.115 15 254 lb. 4,144 in/min
HP Size 3 2 20.89.020 20 477 lb. 4,144 in/min
2 20.89.330 30 530 lb. 8,288 in/min
3 20.89.320 20 530 lb. 8,288 in/min
HT Size 3 2 20.89.430 30 706 lb. 8,288 in/min
3 20.89.420 20 777 lb. 8,288 in/min
4 20.89.415 15 791 lb. 8,288 in/min
HP Size 4 2 20.89.430 30 706 lb. 6,631 in/min
3 20.89.420 20 777 lb. 6,631 in/min
4 20.89.415 15 1,059 lb. 6,631 in/min
HT Size 4 2 20.89.530 30 706 lb. 6,631 in/min
3 20.89.520 20 777 lb. 6,631 in/min
4 20.89.515 15 1,059 lb. 6,631 in/min
HP Size 5 2 20.89.530 30 706 lb. 4,973 in/min
3 20.89.520 20 777 lb. 4,973 in/min
4 20.89.515 15 1,059 lb. 4,973 in/min
HT Size 5 4 20.89.615 15 1,059 lb. 4,973 in/min
4 20.89.630 30 2,225 lb. 9,946 in/min
5 20.89.612 12 1,059 lb. 4,973 in/min
HP Size 6 4 20.89.615 15 1,059 lb. 4,973 in/min
4 20.89.630 30 2,248 lb. 9,946 in/min
5 20.89.612 12 1,059 lb. 4,973 in/min
HT Size 6 5 20.89.715 15 1,695 lb. 6,216 in/min
6 20.89.713 13 1,847 lb. 6,465 in/min
6 20.48.713 15 2,496 lb. 7,460 in/min
HP Size 7 5 20.89.715 15 1,695 lb. 4,083 in/min
6 20.89.713 13 1,847 lb. 4,246 in/min
6 20.48.715 15 2,496 lb. 4,899 in/min

*Force ratings do not include any safety factors.  Drive forces vary depending on gearbox ratio selected.

ZTR

Another method to remove the backlash at the rack & pinion is to use two motor/reducer assemblies with dual pinions operating on the same rack in a master/slave setup.

One pinion drives the axis (the "master") while the second pinion is "preloaded" to remove the backlash (the "slave"). The preload is created electronically with a special motor controller; these systems can also be set up to drive together during cycle times when backlash is not critical.

Our new HighForce Planetary Drives, which can handle highly dynamic and heavy loads, are perfect for these applications. These reducers have backlash levels down to one arc-minute and ratios from 4:1 to 100:1.

The maximum drive force that each system can handle (with safety factor 1.0) is listed below; this should be compared to the application peak force, which can be calculated here, or by filling out our Application Sheet.

For dimensions, please click on the "Reducer Size" in the left column.

Reducer Size: Rack & Pinion
Module:
Pinion: # of Pinion
Teeth:
Maximum Drive
Force:*
Maximum Linear Speed
with 3,000 rpm Motor:
3 2 78.20.526 26 495 lb. 5,118 in/min
2 78.20.527 27 495 lb. 5,315 in/min
2 78.20.529 29 475 lb. 5,709 in/min
2 78.20.535 35 394 lb. 6,890 in/min
4 2 78.21.912 12 247 lb. 2,362 in/min
2 78.21.916 16 384 lb. 3,150 in/min
2 78.21.533 33 771 lb. 6,496 in/min
2 78.20.536 36 765 lb. 7,087 in/min
2 78.21.537 37 744 lb. 7,283 in/min
5 2 78.22.912 12 247 lb. 787 in/min
2 78.22.919 19 457 lb. 1,247 in/min
2 78.22.923 23 562 lb. 1,509 in/min
2 78.22.540 40 1,006 lb. 2,625 in/min
2 78.22.545 45 1,006 lb. 2,953 in/min
3 78.32.912 12 377 lb. 1,181 in/min
3 78.32.914 14 515 lb. 1,378 in/min
3 78.30.530 30 1,177 lb. 2,953 in/min
7 2 78.23.912 12 247 lb. 787 in/min
2 78.23.923 23 562 lb. 1,509 in/min
2 78.23.929 29 716 lb. 1,903 in/min
3 78.33.912 12 377 lb. 1,181 in/min
3 78.33.916 16 618 lb. 1,575 in/min
3 78.33.919 19 743 lb. 1,870 in/min
3 78.33.535 35 1,413 lb. 3,445 in/min
3 78.33.540 40 1,624 lb. 3,937 in/min
4 78.43.912 12 715 lb. 1,575 in/min
4 78.40.530 30 2,295 lb. 3,937 in/min
8 3 78.34.912 12 377 lb. 1,181 in/min
3 78.34.919 19 743 lb. 1,870 in/min
3 78.34.926 26 1,032 lb. 2,559 in/min
3 78.34.932 32 1,280 lb. 3,150 in/min
4 78.44.912 12 715 lb. 1,575 in/min
4 78.44.917 17 1,246 lb. 2,231 in/min
4 78.44.919 19 1,394 lb. 2,493 in/min
4 78.44.520 20 1,483 lb. 2,625 in/min
5 78.54.912 12 1,059 lb. 1,969 in/min
5 78.54.916 16 1,854 lb. 2,625 in/min
5 78.54.918 18 2,072 lb. 2,953 in/min
5 78.50.536 36 3,390 lb. 5,906 in/min
6 78.64.912 12 1,589 lb. 2,362 in/min
6 78.64.913 13 1,847 lb. 2,559 in/min
6 78.64.915 15 2,496 lb. 2,953 in/min
9
4 78.46.912 12 715 lb. 1,575 in/min
4 78.46.919 19 1,394 lb. 2,493 in/min
4 78.46.920 20 1,483 lb. 2,625 in/min
5 78.56.914 14 1,513 lb. 2,297 in/min
5 78.56.918 18 2,072 lb. 2,953 in/min
5 78.56.919 19 2,230 lb. 3,117 in/min
5 78.56.920 20 2,331 lb. 3,281 in/min
6 78.66.912 12 1,589 lb. 2,362 in/min
6 78.66.915 15 2,496 lb. 2,953 in/min
6 78.66.916 16 2,649 lb. 3,150 in/min
10
5 78.57.912 12 1,059 lb. 1,969 in/min
5 78.57.919 19 2,230 lb. 3,117 in/min
6 78.67.912 12 1,589 lb. 2,362 in/min
6 78.67.916 16 2,649 lb. 3,150 in/min
8 78.87.912 12 2,869 lb. 3,150 in/min
10+
10 Please consult the factory!
12

*Force ratings do not include any safety factors. Higher forces are possible depending on gearbox ratio selected.