Maintenance Info
  • 2021/08/10 8:00
    2021/08/12 18:00


This new type of drive unit for linear and rotary drives has been developed through our extensive experience with pin gear drives. It provides improved performance, easier installation, and a wider application range.


Pin gear drive unit consists of a pin gear and engaging pin rack (or pin wheel).


Easy installation, rough mounting allowed

  • ・All pins used in the pin rack and pin wheel are hollow pins, allowing you to easily install the unit using the holes.

Segmented unit configuration accommodates large size machines

  • ・By jointing the racks, the pitch distance can be maintained and the unit can be connected, enabling long distance linear drives.
  • ・Pin wheels for large machines are assembled in segments, so large diameter pin wheels are available by combining the segments.

Downsizing is possible compared to chain systems


The pin gear has specially-shaped teeth to continuously and smoothly engage rollers.
The tooth portion is hardened for additional strength and wear strength.

Tooth profile exclusively for pin gear

The pin gear tooth profile is based on an approximate involute curve, which enables smooth engagement with the pin rack/wheel, while also using a Tsubaki original tooth profile for further strength.

Usage examples   Video content

Usage examples

Trolley linear drive

Model No. example :PDU035-SPA500P/PDU035-SGB024T

Applications: automotive parts transfer
driving traverse trolley

Rough mounting accuracy and easy installation compared with gear racks

Drum drive

Model No. example :PDU055-GPF090P/PDU055-GGC021T090P

Application: driving drum turning

Switching from gears.
Easier installation than cylindrical gears

Table drive

Model No. example :PDU040-NPF240P/PDU040-NGB020T240P

Application: driving tables for parts assembly

Significant cost reduction compared to cylindrical internal gears

Turning drive


Application: driving diverging devices of powder transfer conveyors

Easier installation than chain method


You can select the pin gear drive unit specifications from between the standard series (steel type) and S series (stainless steel type) according to your operating environments.

Standard specifications
Frame No. Pitch
Allowable tangential load   kN
Steel type Stainless steel type
PDU020 20 4.7 0.8
PDU022 22 7.7 1.1
PDU030 30 12.8 1.9
PDU035 35 19.5 2.6
PDU040 40 27.3 4.1
PDU050 50 31.7 5.1
PDU055 55 52.9 7.0
PDU070 70 60.7 9.9
PDU080 80 71.5 12.0
PDU090 90 98.9 16.8
PDU120 120 122.5 ---
PDU150 150 240 ---
PDU180 180 347 ---
PDU240 240 525 ---
*The pitch of the pin wheel is a circular pitch.
*The allowable tangential loads will decrease depending on specifications/usage conditions.
  Steel type Stainless steel type
Max. operating speed Tangential velocity:50m/min
Operating environments Indoors (away from rain and water) Corrosive environments
Operating temperature ‐10℃~150℃ ‐20℃~400℃
Material Frame Rolled steel Austenitic stainless steel
Bush Alloy steel Precipitation hardened stainless steel
Roller Alloy steel Austenitic stainless steel
Pin gear Carbon steel (hardened teeth specifications) Austenitic stainless steel
Backlash (reference values) and distance accuracy between shafts
Frame No. Steel type Stainless steel type
Distance accuracy between shafts
Distance accuracy between shafts
PDU020 0.26~0.47 ±0.25 0.26~0.47 ±0.25
PDU022 0.32~0.57 ±0.3 0.32~0.57 ±0.3
PDU030 0.32~0.66 ±0.4 0.32~0.67 ±0.4
PDU035 0.33~0.88 ±0.5 0.33~0.88 ±0.5
PDU040 0.41~0.86 ±0.6 0.41~0.86 ±0.6
PDU050 0.53~0.98 ±0.7 0.53~1.08 ±0.7
PDU055 0.61~1.06 ±0.75 0.61~1.26 ±0.75
PDU070 0.86~1.24 ±0.9 0.86~1.61 ±0.9
PDU080 0.89~1.20 ±1 0.89~1.74 ±1
PDU090 0.97~1.42 ±1.2 0.97~1.92 ±1.2
PDU120 1.30~1.57 ±1.6 --- ---
PDU150 1.63~1.96 ±2 --- ---
PDU180 1.95~2.36 ±2.4 --- ---
PDU240 2.60~3.14 ±3.2 --- ---
* The above amount of backlash in mm is a calculated value and not a guaranteed value. Also note that the backlash amount varies due to wear of the pin gear drive unit and the pin gear.

Special backlash specifications *These specifications differ from standard allowable tangential loads.

Large backlash specifications

 Large backlash enables easy mounting.

Small backlash package

 Can reduce backlash. (2/3 of standard backlash, available frame no.: PDU020-PDU120)


Before operation, apply extreme pressure grease to the outer peripheries of all rollers. Inner surfaces of the pin wheel/pin rack rollers are pre-lubricated. Please contact Tsubaki when lubricating grease cannot be used in applications such as under-wate

Mounting method

Pin wheel & pin rack flat type

Using hollow pins, the holes can be used to fix the side face to another device with bolts.
On installation, you can decide the position by setting up a stopper or guide on the convex face.

Pin rack angle type

The angle-style straight line rack can be fixed to another device by using the tightening bolt holes for fastening.

Detailed Information

Use the link buttons below for detail information regarding pin wheel, pin rack and pin gear.