RW series

RW series

RW series

Product catalog summary
Overview: The RollerDrive RW series is a high-speed rotary positioner designed for welding machines, known for its speed and durability. It can handle shocks from high-speed positioning and emergency stops of heavy loads. The design features an oversized hollow output shaft for easy wiring and plumbing, and a low-profile body for compact equipment design.
Key Features:
  • Super high-speed positioning with a 180° indexing time of 1.5 seconds for a 2000 kg load (RW320 model).
  • Oversized hollow shaft of 360 mm (RW320 model).
  • Thin-profile body of 295 mm (RW320 model).
  • Preload mechanism to eliminate backlash, ensuring precision and efficiency.
Theory of Operation: The RollerDrive Reducer uses a roller gear mechanism with an input shaft and a turret (output shaft) with roller followers. These followers are preloaded against the input shaft to eliminate backlash, ensuring zero backlash, precision, and efficiency while preventing wear.
Model Specifications:
  • Models: RW170, RW240, RW320.
  • Gear Ratios: 72, 120, 216, 360.
  • Allowable loading capacity: Up to 9000 kg for RW320.
  • Angular repeatability accuracy: ±0.05°.
  • Maximum speed: Up to 210°/sec.
Lubrication and Maintenance: The units use high-performance lubrication oil, which should be replaced every 3,000 hours of operation. The oil level should be checked when the unit is stopped and replaced if low or discolored.
Dimension Drawings: Detailed dimension drawings are provided for each model, specifying mounting positions, oil filling ports, and access holes for input reducers.
Global Service Network: Sankyo offers a global service network with offices in the USA, China, Korea, Thailand, Vietnam, Singapore, and Taiwan.
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Catalog excerpts

RW series-1

High-speed Rotary Positioner for Welding Machines ※With a moment of inertia of 600

 Open the catalog to page 1
RW series-2

Sankyo's Rotary Positioner for Welding Machines Offers Unsurpassed Speed and Durability The RollerDrive RW Series is a positioner for welding machines. It holds up against shocks that are caused by high-speed positioning and emergency stopping of heavy loads. The oversized hollow output shaft simplifies wiring and plumbing to the equipment to be mounted on the output shaft. The low-profile body allows for compact equipment design. Super high-speed positioning (180° indexing time) : 1.5 sec/2000 kg [RW320] ※With a moment of inertia of 600 kg/m 2. Oversized hollow shaft 360 mm [RW320] Tough against...

 Open the catalog to page 2
RW series-3

Model Code ©Position of input reducer access hole ©Mounting position RollerDrive Surfaces *The motor listed above comes with a brake. ©Connector position on servomotor

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RW series-4

Output shaft runout (axial/radial) Angular repeatability accuracy Rotating Angle Sizes Allowable loading capacity Allowable moment load output shaft Gear ratio Maximum Speed Internal moment of inertia on motor shaft ※Weight for RW320 (high gear ratio) Yaskawa Motor. These units use high-performance lubrication oil. The lubrication oil will remain chemically and thermally stable, but should be replaced every 3,000 hours of operation to prolong the life of the unit. Use the oil level gauge to check the condition of the lubrication. Check lubrication when the unit has stopped. If the oil appears...

 Open the catalog to page 4
RW series-5

Standard Gear Ratio Model [Gear ratio =72] Unit:mm Oil filling port Rc1/2 when using ⑤ as mounting surface Oil filling port Rc1/2 when using ① as mounting surface (4)φ18 THRU C-BORE φ32, 40DP (For mounting holes) Oil level gauge when using ① as mounting surface ※1 3×(2)Rc1/2 Motor base access holes (For mounting/removing motor) Oil level gauge when using ⑤ as mounting surface (Both sides) ※1 Motor base access holes are not provided on side R. ※2 Servomotor to be supplied by customer. High Gear Ratio Model Gear ratio=216] 〔 Unit:mm (2)φ12 +0.018, 20DP 0 (Reverse side) Oil level gauge when using...

 Open the catalog to page 5
RW series-6

Standard Gear Ratio Model [Gear ratio =120] Unit:mm (4)φ18 THRU (For mounting holes) ※1 3×(2)Rc1/2 Motor base access holes (For mounting/removing motor) Oil filling port Rc3/4 when using ① as mounting surface Oil filling port Rc3/4 when using ⑤ as mounting surface U Oil level gauge when using ⑤ as mounting surface (2)φ18 THRU (For mounting holes) +0.018 Oil level gauge when using ① as mounting surface ※1 Motor base access holes are not provided on side R. ※2 Servomotor to be supplied by customer. High Gear Ratio Model Gear ratio=360] 〔 Unit:mm ※1 3×(2)Rc1/2 Motor base access holes (For mounting/removing...

 Open the catalog to page 6
RW series-7

Standard Gear Ratio Model [Gear ratio=120] Unit:mm 794 684 590 ±0.06 (4)φ26 THRU (For mounting holes) ※1 3×(2)Rc1/2 Motor base access holes (For mounting/removing motor) Oil filling port Rc3/4 when using ① as mounting surface Oil level gauge when using ⑤ as mounting surface Oil filling port Rc3/4 when using ⑤ as mounting surface (2)φ26 THRU (For mounting holes) 310 Oil level gauge when using ① as mounting surface ※1 Motor base access holes are not provided on side R. ※2 Servomotor to be supplied by customer. High Gear Ratio Model Gear ratio=360] 〔 Unit:mm (976.5) ※1 3×(2)Rc1/2 Motor base access...

 Open the catalog to page 7
RW series-8

SANKYO CHINA TRADING CO., LTD. Group Company SANKYO AMERICA INC. 10655 STATE ROUTE 47 SIDNEY, OHIO, 45365 U.S.A. Phone: 1-937-498-4901 • Fax: 1-937-498-9403 E-mail: [email protected] HANGZHOU SANKYO MACHINERY CO., LTD. SANKYO SEISAKUSHO CO. TAIWAN SANKYO CHINA TRADING CO., LTD. (SHANGHAI HEAD OFFICE] RM 1103, BLK B, NO.391 GUIPING ROAD,SHANGHAI CHINA Phone:+86-21-5445-2813-Fax:+86-21-5445-2340 E-mail [email protected] (SHENZHEN BRANCH OFFICE] RM 721, SHENZHEN KERRY CENTRE, 2008 RENMINNAN ROAD, SHENZHEN 518001 CHINA PHONE: +86-755-8230-0270* FAX: +86-755-8236-4605 E-mail:[email protected] (TIANJIN...

 Open the catalog to page 8

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.