The ZERO-Backlash Positioner

RollerDrive

RollerDrive Product GuideRA series
RU series● RW series●●®

Zero-backlash Techno

Preload structure
OutputshaftO(turret)

RA series Product size: 40 to 125

Economicadva
nta
ge

Sp
ace
sav
ing

Input shaft (roller gear cam)

Hig
h-s
pe
ed
po
sit
ion
ing

Lo

ads

Performance

Po
sit
ion
ing
acc
uracy

Roller followers

Wedge-shaped ribs on input
shaft contact roller followers
under preload to eliminate
backlash completely.

Gear ratio

1/15〜1/30

Light-Weight・Ultra precision
90 arcseconds
or less※1

RU series Product size: 40 to 500

1/15〜1/150

High Rigidity・Versatility
90 arcseconds
or less※1

RW series Product size: 170 to 320

1/72〜1/360

Heavy loads・Ultra precision
φ1000 orlarger※1 Size of dots in ﬁgure denote overall accuracy.

※2 Maximum output refers to maximum torque at starts and stops.

60 arcseconds
or less※1

logy Delivers Unsurpassed Motion
The ZERO-Backlash Positioner
Ultimate Rotary Positioner.
Featuring a roller gear cam mechanism that offers accuracy, rigidity, and durability.
The most outstanding feature of the RollerDrive is its ability to deliver output motions faithfully true to the control input. This is theresult of the preload mechanism unique to roller gear cam mechanisms which eliminates all traces of backlash. Roller followers transfer power from the input shaft to the output shaft through rolling contact, which eliminates wear and also maintains the initial accuracyof the unit for prolonged periods of use. Also possible to stop instantly at the emergency and it has high durability against shocks for
instantaneous stop.
The RollerDrive encompasses the performance not available with a stand-alone motor in a small footprint. For instance, it can index athigh-speeds while delivering powerful torque and high precision, and it can position dynamically while offering noise resistance andself-clamping properties that stand up to machining loads while supporting work. All this is achieved through mechanical means. As forease of use, the thin compact form and large diameter output hollow hole serve as the concept of design, flexible mounting positions, onepart of models helps reduce totally the burden on designing the RollerDrive into equipment, such as the aluminum alloy housing which
offers excellent heat dissipation.
These excellent properties are the exclusive benefits of a mechanical design that makes the RollerDrive indispensable for robots, machining centers, and other state-of-the-art factory automation applications in the high-tech industries. Today, more than 20,000 RollerDrives
continue to boost the productivity of factory automation equipment all over the world. Our comprehensive lineup of RollerDrive products
offers the perfect solution for equipment, or on the production floor.

RollerDriveMajor Products
model featuring an array of RollerDrive
technology in an easy to use package.
RA High-end

all-purpose model is usable forvarious applications.
RU ThisRolling transfer

is high efficiency model for
Heavy loading Positioner.
RW ThisCross roller(RA Series, RW Series only)

Torque is transferred from theinput to the output by rolling
action of the roller followers.
Rolling contact holds initialaccuracy semi-permanently.

Output shaft bearing is a single
piece design with built-in crossroller bearings. Minimum
surface runout of Thin Compact
Form and Output Shaft.

Max output
torque [N·m]Positioning accuracy[arcseconds or less]

Rated output speed[min-1]

Allowable
axial load[N]

Allowable
moment load
[N·m]Profile height[mm]

Diameter of hollow
output shaft[mm]Casingmaterial

Weight ofmain unit [kg]55〜1,150※240〜90

20〜60

1,000
〜8,17030〜76070〜140

φ25〜115

Aluminum alloy

2.5〜36.3

100〜26,090※240〜90

12〜60

3,000
〜180,000

100〜200,000

100〜405

φ20〜600

Cast iron

9〜1,715

1,000〜8,000※230〜90

10〜35

61,000〜201,000

5,500〜10,700

210〜295

φ180〜360

Cast iron120〜650Applications

Inspection device（RA Series）

Automotive Welding and Assembly Process（RU Series）

Rotary Table for the use of Hollow Shaft（RW Series）

Turning, Oscillating Arm（RA Series）

Oversized Welding Positioner（RU Series）

Oversized Welding Positioner（RW Series）

Global network
Group Companies
Sankyo China Trading Co., Ltd.
Hangzhou Sankyo Machinery Co., Ltd.
Sankyo America Inc.
Italy

Sankyo Seisakusho Co.
Sankyo Shizuoka Seisakusho Co.
Sankyo Korea Co., Ltd.
TaiwanRodax Vietnam Co., Ltd.
Headquarters
Global Sales Offices
Production Facilities
International Distributors

India

Sankyo Works（Thailand）Co., Ltd.
Singapore
ThailandSankyo America Inc.
10655 State Route 47 Sidney, Ohio, 45365 U.S.A.
Phone： +1-(0)937-498-4901 Fax： +1-(0)937-498-9403
Email： sales@sankyoautomation.com
Sankyo Korea Co., Ltd.
1449-48 Seobu-ro, Gwonseon-gu, Suwon-si, Gyeonggi-do, 16643 Korea
Phone： +82-(0)31-895-5991 Fax： +82-(0)31-895-6607
Email： kr-sales@rollerdrive.com
Sankyo China Trading Co., Ltd.
[Shanghai Sales Office]Room 1103, Block B, No.391 Guiping Road,
Shanghai 200233 China
Phone： +86-(0)21-5445-2813 Fax： +86-(0)21-5445-2340
Email： sales@sankyochina-trading.com[Shenzhen Sales Office]Unit 19j, Tower B, Neo Building, No.6009 Shennan Avenue,
Futian District, Shenzhen China
Phone： +86-(0)755-8230-0270 Fax： +86-(0)755-8236-4605[Tianjin Sales Office]Room 1905, Pengzhanfeiwo Building A, Crossing Yale Road Yaolin Road,
Xiqing District, Tianjin 300380 China
Phone： +86-(0)22-2312-1005 Fax： +86-(0)22-2312-1007[Guangzhou Sales Office]Room 913, Xing Pu Buliding, No.12 Guan Hong Road,
Guangzhou Economic Development Zone, Huang Pu,
Guang Zhou 510670 China
Phone： +86-(0)20-8985-1846 Fax： +86-(0)20-8225-7346[Wuhan Sales Office]Room 2301, Taihe Square, No.134 Wusheng Road, Wuhan,
Hubei Province China
Phone： +86-(0)27-8568-5818 Fax： +86-(0)27-8568-2818
Sankyo Works (Thailand) Co., Ltd.
9/31 Moo 5, Phaholyotin Road, Klongnueng,
Klong Luang, Patumthani 12120 Thailand
Phone： +66-(0)2-516-5355 Fax： +66-(0)2-068-0931
Email： sales@sankyo-works.co.th

Contact us
Mon-Fri AM8:30-12:00 PM13:00-17:30 UTC + 09:00 (JST)（Except public holidays and company holidays）■Headquarters (International Sales Division)
3-37-3 Tabatashinmachi, Kita-ku, Tokyo, Japan 114-8538
Phone: +81-(0)3-3800-3330 Fax: +81-(0)3-3800-3380
Email: overseas@sankyo-seisakusho.co.jp
URL: http://www.sankyo-seisakusho.co.jp■Taiwan Sales Office
No.21, Ln.152, Jianxing Rd., Sanhe Vil., Daya Dist., Taichung City 42876, Taiwan (R.O.C.)
Phone: +886-(0)4-2359-4048 Fax: +886-(0)4-2359-4720
Email: tw-sales@rollerdrive.com

・Speciﬁcations and dimensions are subject to change without notice.
Consult Sankyo sales before ordering.

http://www.sankyo-seisakusho.co.jp

RD-2021/03E（DT）