Sankyo Automation
Feel free to contact us. [937.498.4901]
Email us


Sankyo News

Overview
Features
Typical Applications
Specifications
Downloads
Related Products
RA Series
Overview
Rollerdrive RA Series

The RA Series has a lightweight aluminum housing, ideal for robot end of arm tooling. It’s zero-backlash reducer using our RollerDrive® Technology mechanism. Unlike gear/worm type friction drives, this revolutionary design combines preloaded rolling contact for high-efficiency and minimal wear. Packaged in a compact low profile housing, standard features include a large diameter output bore and mounting for any servo motor brand of your choice. An optional inline or right angle second reducer solves speed, torque, motor mounting or footprint challenges. Buy it only once, this versatile system can be programmed and repurposed for long or short term applications.

RollerDrive CNC Technology

Features

Zero Backlash
The RollerDrive uses a unique preload mechanism to completely eliminate backlash and deliver output motions that are faithfully true to input commands.
Positioning accuracy is particularly good with direction reversing motions.
Highest Level of Accuracy in the RollerDrive Series
Delivers good positioning accuracy and runout accuracy, which are otherwise difficult qualities to attain with a small reducer.
High Rigidity
The output shaft is a solid-piece cross roller bearing designed for durability against axial and radial loads.
High Speed
Max output speed 150 rpm (200 rpm for the RA40)
Choice of Motors
Dedicated fittings are available for mounting motors from various manufacturers.
High Efficiency, Direct Drive
Motor couples directly to the input shaft for a direct transfer of power with less transfer loss.
Lightweight, Compact
Features a compact aluminum-alloy housing for minimal footprint.
Typical Applications
Specifications

The RA Series standard lubrication is grease filed with maintenance-free and mounting in any position. Optional oil filled units are for high speed applications and one of the six housing mounting position must be specified (see catalog).

Grease Lubrication
* Made to order.

Model RA40 RA63 RA80 RA100 RA125
Gear Ratio 15 20 20 30* 20 30* 20 30*
Max Torque for Starts/Stops N·m 57.7 129.3 202.3 147.9 564.8 250.3 938.6 637.5
Maximum Allowable Input Speed rpm 3,000 2,500 2,000 1,600
Allowable Mean Input Speed rpm 900 800 700 600
Positioning Accuracy Max arcsec 90 60 40
Repeatability Max arcsec ±10 ±7 ±5
Surface Runout Max µm 10
Allowable Axial Load N 999 1,657 3,302 3,724 8,178
Allowable Radial Load N 669 1,359 2,819 3,109 7,452
Allowable Moment Load N·m 33 79 210 284 764
Product Weight kg 2.5 5.6 11.6 21.5 36.3
Oil Lubrication
* Made to order.

Model RA40 RA63 RA80 RA100 RA125
Gear Ratio 15 20 20 30 20 30 20 30
Max Torque for Starts/Stops N·m 71.0 159.2 249.0 182.1 695.4 308.2 1,155.6 784.8
Maximum Allowable Input Speed rpm 3,000
Allowable Mean Input Speed rpm 1,300 1,100 1,000 900
Positioning Accuracy Max arcsec 90 60 40
Repeatability Max arcsec ±10 ±7 ±5
Surface Runout Max µm 10
Allowable Axial Load N 999 1,657 3,302 3,724 8,178
Allowable Radial Load N 669 1,359 2,819 3,109 7,452
Allowable Moment Load N·m 33 79 210 284 764
Product Weight kg 2.5 5.6 11.6 21.5 36.3
Operating Precautions
Do not operate the RollerDrive under conditions where the surface temperature may rise above 60℃. Operation under high temperatures can degrade lubrication oil.
Downloads
>> Download the Rated Transfer Torque Capacity Table for rated torque values.
Product Catalogs
2D-CAD Data
3D-CAD Data
Inquiry Form
Related Products
>> RU Series
Small-large load
Quick indexing
~6x bending moment
>> AD (Alpha) Series
Hollow table output
Max 48 index stops
with built-in gearmotor

© Copyright 2017 Sankyo Automation. All rights reserved.