RollerDrive

RW

High-speed Rotary Positioner for Welding Machines

RollerDrive®

RW series

1.5 sec/180°※（2000kg）※With a moment of inertia of 600kg/m 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.

Features of the RW Series● 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]● Thin-profile body 295 mm [RW320]● Tough against impact from emergency stops

Theory of Operation
The RollerDrive is a positioner that uses a roller gear
mechanism, one of the ﬁnest motion control mechanisms
available. The unit consists of an input shaft (roller gear cam)and a turret (output shaft) that are equipped with roller
followers.
The roller followers are preloaded by the screw on the input
shaft, to eliminate backlash. Our proprietary adjustment
mechanism provides the optimum preload.
The roller followers in the turret use internal roller bearings totransfer torque while rotating.
This mechanism ensures zero backlash, precision, and eﬃciency
while preventing wear. It also provides long-term, consistentaccuracy.
The servomotor drive delivers unparalleled, ultimate motion
control.

Roller gear mechanism

Output shaft（Turret）

Roller followers

Input shaft

Preload mechanism
Output sshaft

Roller followers

C
Cam

Input shaft

1Model CodeModel CodeRW 240 - 120 R 1 T A R①① ModelRW②② Size③ Gear ratio

170

72
216

240
320

③

④

⑤

⑥

⑦

⑧

④ Position of input⑤ Mounting position ⑥ Servomotor position ⑦ Type of servomotor
reducer access hole

R
S
（High gear ratio※）V
W
120
Z : For gear ratios
360（High gear ratio※）
72 and 120

T：Standard
Mounts on right side
U：Mounts on left side

1

R：Special order
S：Special order
V：Special order
W：Special order

A
B
D
E
F
X

5
9：Special order⑧ Connector position
on servomotor

T：Standard
Mounts on right side

Z：Standard

Customer to mountservomotor※ Input gear reducer is mounted on models with high gear ratios.

③Input reducer
Manufacture
NIDEC-SHIMPO CORPORATION

Model No.

Gear ratio

WeightVRS-100C-3-S3-38KA35

1/3

8.1kg

1/3

17kg

V

W

VRS-140C-3-S3-48KA42※RW320/Special for Yaskawa Electric motors④Position of input reducer access hole
R

S

Z

S

S

V

V

For gear ratios 72 and 120
WRW

On side R

SVR

On side S

WR

On side V

On side W

RollerDrive Surfaces⑤Mounting position1

59Standard gear ratio model
V

SHigh gear ratio model

T
V

S

T

Special order※Ask Sankyo.

RW

W surface on bottom

Servomotor
Input reducer

Servomotor
Motor baseU

R surface on bottom

U

Motor base

R

RollerDrive bodyW

RollerDrive body

※ Shown with sevo motor on T surface⑦Type of servomotor
Code

Manufacture

Model
RW170
RW240
RW320
RW170
RW240
RW320
RW170
RW240
RW320
RW170
RW240
RW320
RW170
RW240
RW320
Same for all sizes

A

B

D

E

F
X

Yaskawa Electric（Σ-Ⅴ）

Yaskawa Electric (Σ-7)

Mitsubishi Electric (J4)

FANUC

Mitsubishi Electric (J5)

Model No.

Capacity（kw）

SGMGV-30A3A2E
SGMGV-44A3A2E
SGMGV-75A3A2E
SGM7G-30A7A2E
SGM7G-44A7A2E
SGM7G-75A7A2E
HG-SR352BJ
HG-SR502BJ
HG-SR702BJ
αiF12/4000-B（A06B-2243-B400)
αiF22/4000-B（A06B-2248-B400)
αiF30/4000-B（A06B-2253-B400)
HK-ST352WBJHK-ST502WBJ
HK-ST702WBJ
Motor not listed above

2.9
4.4
7.5
2.9
4.4
7.5
3.5
5.0
7.0
3.0
4.0
7.0
3.5
5.0
7.0

※The motor listed above comes with a brake.

⑧Connector position on servomotor
R

S

V

W

Z

S

S

V

V

Standard：
Customer tomount servomotor
R

W
R

V

Special order：
On side RRVSpecial order：
On side S

WSpecial order：
On side V

2

R

Special order：
On side W

RollerDrive Specifications
Sizes

RW170

RW240

RW320

Allowable loading capacity

kg

2000

5000

9000

Allowable moment load output shaft

N・m

5500

8800

10700

Output shaft runout (axial/radial)

μm or less

10

10

10

Angular repeatability accuracy

mm±0.05（R=1000mm）±0.05（R=1000mm）±0.05（R=1000mm）

Rotating Angle

deg

0〜360

0〜360

0〜360

72

Gear ratio

216

120

360

120

360

/sec） 8.3（50°/sec） 25（150°/sec） 8.3（50°/sec）
35（210°/sec）13.8（83.3°/sec） 25（150°

Maximum Speed

min−1Internal moment of inertia on motor shaft

kg･㎡

0.003880.00173

0.006140.00198

0.01180.00261

kg

120

128.1

400

408.1

650

658
※
（667）

Weight (Motor not included)※Weight for RW320 (high gear ratio) Yaskawa Motor.

RW170※Table size：1000mm×700mm

180°Indexing time

Weight of load

Moment of inertia

1.5sec700kg

86.9kg･㎡

2.0sec1000kg124.2kg･㎡

3.0sec2000kg248.3kg･㎡

RW240※Table size：1500mm×1000mm

180°Indexing time

Weight of load

Moment of inertia

1.5sec1200kg325kg･㎡

2.0sec2000kg541.7kg･㎡

3.0sec5000kg1354.2kg･㎡

RW320

●

※Table size：2000mm×1400mm

180°Indexing time

Weight of load

Moment of inertia

2.0sec2000kg993.3kg･㎡

3.0sec4000kg1986.7kg･㎡

4.5sec9000kg4470kg･㎡

Oil lubrication

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 low or discolored, change it with fresh oil regardless of the hours of operation. Occasionally, air bubbles may form in the oil
during operation but this is natural and not a quality concern.

※：Use the following lubricant for reﬁll.
Standard lubricant：Mobil SHC629 (VG150)
Use of diﬀerent oil can cause wearing or other problems.

Oil Volume by Mounting Positions
1

5

9

Mounting position

RW170

Special order

W surfaceon bottom

R surface on bottom

3ℓ

3ℓ

RW240

6ℓ

7ℓ

RW320

15ℓ

14ℓ

Ask Sankyo.

3

Dimension drawings
RW170 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)M12×1.75, 20DP
(For lifting)

Rc1/2
Air relief plug,
for adding oil

160
100±0.02
90(4)M12×1.75, 20DP
(For lifting)S, 15DP

C

70

70
C

+0.015(4)φ8 0

20

125
100

160
100±0.02
90C(4)φ18 THRU
C-BORE φ32, 40DP
(For mounting holes)

A+0.0 3409

320±0.05

V

φ3 +
5 0.0

100±0.02

T(4)M12×1.75, 24DP
Equally spaced on 200 BC

G.L.⑤
14

1

42

U

114

100±0.02
160 ±0.15

115

Oil level gauge when using① as mounting surface

304.5

54

445

0

φ239.9 −0.046

165
100
91.5 ±0.15
40±0.02 40±0.02
55

265
250
245

340

※1 3×(2)Rc1/2
Motor base access holes(For mounting/removing motor)

45 °Hollow bore φ180(8)M12×1.75, 18DP
Equally spaced on 215 BC+0.018(2)φ12 0, 20DP（Reverse side）

200
210

100
125
180

Oil level gauge when using⑤ as mounting surface(Both sides)

Drain
SFMS-M12(NBK)

100
125
360

50

480
0.2

2

196

A

+0.018R(2)φ12 0, 20DP+0.018(2)φ12 0, 20DP(For machining at Sankyo)

27

36

27± 0.1 5

146

146 ±0.03

37
(48)

(47)

100
2

120

G.L.①

Drain
Rc1/4

30

(4)M16×2, 30DP

W

35
300

※1 Motor base access holes are not provided on side R.
※2 *2: The customer must supply their own servo motor.

RW170 High Gear Ratio Model〔Gear ratio=216]
Unit：mm160
100 ±0.02
90

Oil ﬁlling port Rc1/2
when using ⑤ as mounting surface
Oil ﬁlling port Rc1/2
when using ① as mounting surface

160
100 ±0.02
90
S, 15DP

C

70
CC(8)M12×1.75, 18DP
Equally spaced on 215 BC

320±0.05

V

100
125
180

100
125

100
50

360

120

19

（163.5）2196

2（662.5）0.2

A+0.018R（47）(2)φ12 0, 20DP+0.018(2)φ12 0, 20DP

37（48）(For machining at Sankyo)

36

G.L.①
30

Drain
Rc1/4

27±0 .15

146 ±0.03

VRS-100C-3-S3-38KA35(NIDEC-SHIMPO CORPORATION)

146

Drain
SFMS-M12(NBK)(2)φ12 +0.018, 20DP
0（Reverse side）
Oil level gauge when using⑤ as mounting surface(Both sides)

27

200
210

+0.0 34
09 ）※3 Rc1/2
Input reducer
access hole
(For mounting/removing motor)

1

G.L.⑤
14

T

（φ
35 +0.0

100 ±0.02
114

115

100 ±0.02
160±0.15

42

U（φ114.3+0.047+0.012）（□180）

304.5

55

265
250
245

Oil level gauge
when using ① as
mounting surface((4)M12×1.75, 25DP)(Equally spaced on 200 BC)

54100
91.5 ±0.15
40 ±0.02 40 ±0.02

165※1 3×(2)Rc1/2
Motor base access holes(For mounting/removing input gear reducer)

）
5°
（4

340

445

0

φ239.9 −0.046

Rc1/2
Air relief plug,
for adding oil+0.015(4)φ8 0A

Hollow bore φ180(2)M12×1.75, 20DP
(For lifting)(4)M12×1.75, 20DP
(For lifting)

70

125
100

20

(4)φ18 THRU
C-BORE φ32, 40DP
(For mounting holes)

35
300

4

W

(4)M16×2, 30DP

※1 Motor base access holes are not provided on side R.
※2 *2: The customer must supply their own servo motor.
※3 Use the product code to specify the positionof the access hole for the input reducer. (Refer to P.2)

Dimension drawings
RW240 Standard Gear Ratio Model [Gear ratio =120]
Unit：mm

265
255

633

(4)φ18 THRU
(For mounting holes)

520(4)M16×2 THRU
(For lifting)

4

50
25

113

+0.018

φ12 0
THRU
φ18 THRU, 30DP

260
90

150

150
435 ±0.05
190
100
S

190
100

※1 3×(2)Rc1/2
Motor base access holes(For mounting/removing motor)

104(2)M16×2, 32DP
(For lifting)2
600 ±0.05

700
440
400
420 ±0.15

Oil ﬁlling port Rc3/4
when using ①
as mounting surface

320
249

620

0

φ350 −0.057

Hollow bore φ250

Rc1/4
Air relief plug,
for adding oil

T

45 °

R3

260
150
220

90

Oil ﬁlling port Rc3/4
when using ⑤
as mounting surface
U

90

34
+0.0.009
05+φ3(4)M12×1.75, 24DP
Equally spaced on 200 BC(2)φ12 +0.018, 25DP0

Oil level gauge when using⑤ as mounting surface

V

G.L.⑤

131

150 ±0.03
190
215 ±0.15240(2)φ18 THRU
(For mounting holes)

213+0.018

φ12 0
THRU
φ18 THRU, 30DP

150 ±0.03
190
240

R

Oil level gauge when using① as mounting surface

50
106(55.5)

80(12)M16×2, 3 2DP
Equally spaced on 300 BC

G.L.①

Drain
Rc1

W

※1 Motor base access holes are not provided on side R.
※2 The customer must supply their own servo motor.

RW240 High Gear Ratio Model〔Gear ratio=360]
Unit：mm※1 3×(2)Rc1/2
Motor base access holes(For mounting/removing input gear reducer)（815.5）
265
255
50
25

(4)φ18 THRU
(For mounting holes)
4(4)M16×2 THRU
(For lifting)Oil ﬁlling port Rc3/4
when using ⑤
as mounting surface

520

113

19

（163.5）

260
90

150
190
100

150
435 ±0.05
190
100
S

90

104

φ12 +0.018
TH RU
0φ18 THRU, 3 0DP(2)M16×2, 32DP
(For lifting)

420 ±0.15(2)φ12 +0.018, 25DP
0((4)M12×1.75, 25DP)(Equally spaced on 200 BC)

V(2)φ18 THRU
(For mounting holes)+0.018

φ12 0
THRU
φ18 THRU, 30DP
（55.5）

150 ±0.03
190
215 ±0.15240

150 ±0.03
190
240

R

Oil level gauge when using① as mounting surface

VRS-100C-3-S3-38KA35（NIDEC-SHIMPO CORPORATION）

50
106

131
213

）

80

Oil level gauge when using⑤ as mounting surface

34+0.0.009

5 +0※3 Rc1/2
Input reducer
access hole
(For mounting/removing motor)(12)M16×2, 32DP
Equally spaced on 300 BC
G.L.⑤

620

（□180）

2
700

3
（φ
440
400

Oil ﬁlling port Rc3/4
when using ①
as mounting surface

320
249

47
（φ114.3 +0.0
+0.012 ）

260
150
220

0

φ350 −0.057

Hollow bore φ250

Rc1/4
Air relief plug,
for adding oil

T

）
5°
（4

R3

600 ±0.05

90

U

G.L.①

Drain
Rc1

W

5

※1 Motor base access holes are not provided on side R.
※2 The customer must supply their own servo motor.
※3 Use the product code to specify the positionof the access hole for the input reducer. (Refer to P.2)

Dimension drawings
RW320 Standard Gear Ratio Model [Gear ratio=120]
Unit：mm
794
684
590 ±0.06(4)φ26 THRU
(For mounting holes)

6

50

110

φ479.9 −0.063

110
125

※1 3×(2)Rc1/2
Motor base access holes(For mounting/removing motor)(2)M16×2, 32DP
(For lifting)T(4)M12×1.75, 24DP
Equally spaced on 200 BC+00.03
.00 4
9

535
495
520 ±0.1587040760 ±0.06790

0Hollow bore φ360

415

Oil ﬁlling port Rc3/4
when using ①
as mounting surface
Oil level gauge when using⑤ as mounting surface

280

200
265
140
S

45 °

Oil ﬁlling port Rc3/4
when using ⑤
as mounting surface

φ12 +0.018
THRU
0φ18 THRU, 30DP

335
200
110
270

U

R3

Rc3/4
Air relief plug,
for adding oil

200
265
140

(4)M16×2 THRU
(For lifting)

17.5

110

335

(2)φ16 +0.018, 32DP
0

φ3
5 +

295
277

80

V

G.L.⑤

220 ±0.03
225
255(2)φ26 THRU
(For mounting holes)

150
252

φ12 +0.018
THRU
0φ18 THRU, 30DP

290±0.15
310

310
Oil level gauge when using① as mounting surface

R

33

125

(54.5)(16)M16×2, 32DP
Equally spaced on 440 BC

220 ±0.03
239
255

G.L.①

W

Drain
Rc3/4

※1 Motor base access holes are not provided on side R.
※2 The customer must supply their own servo motor.

RW320 High Gear Ratio Model〔Gear ratio=360]
Unit：mm（976.5）※1 3×(2)Rc1/2
Motor base access holes(For mounting/removing input gear reducer)

φ12 0
T HRU
φ18 THRU, 30DP((4)M12×1.75, 25DP)(Equally spaced on 200 BC)（φ
35 +0.0

φ12 +0.018
THRU
0φ18 THRU, 30DP

(16)M16×2, 32DP
Equally spaced on 440 BC

220±0.03
239
255
310

Oil level gauge when using① as mounting surface

T

R

110

40

（218）

※4 VRS-140C-3-S3-48KA42（Special for Yaskawa Electric motors）（NIDEC-SHIMPO CORPORATION）((4)M12×1.75, 25DP)(Equally spaced on 200 BC)

G.L.①

Drain
Rc3/4

W

6

34 ）
+0.0.009
042 +（φ※3 Rc3/4
Input reducer access hole
(For mounting/removing motor)

（4
5°
）

33

125

+0. 04 7（54.5）

220±0.03
225
255
290 ±0.15
310（φ114.3+0. 01 2 ）（□180）(2)φ26 THRU
(For mounting holes)(2)φ16 +0.018, 32DP
0

80

V

150
252

(2)M16×2, 32DP
(For lifting)790※3 Rc1/2
Input reducer access hole
(For mounting/removing motor)※4
VRS-100C-3-S3-38KA35（NIDEC-SHIMPO CORPORATION）

Oil level gauge when using⑤ as mounting surface

G.L.⑤

125

+0 34
.00
9）

870

40

0

φ479.9 −0.063

Hollow boreφ360

415+0.018110）
5°

Oil ﬁlling port Rc3/4
when using ①
as mounting surface
280

200
265
140
S

（4

Oil ﬁlling port Rc3/4
when using ⑤
as mounting surface

200
265
140

（□180）

U

R3

Rc3/4
Air relief plug,
for adding oil

110

335
200
110
270

(4)M16×2 THRU
(For lifting)

17.5

760 ±0.06

50

110 19 （163.5）684
590 ±0.06
335

04 7（φ114.3 +0.
+0. 01 2 ）(4)φ26 THRU
(For mounting holes)

6

535
495
520 ±0.15

295
277※1 Motor base access holes are not provided on side R.
※2 The customer must supply their own servo motor.
※3 Use the product code to specify the positionof the access hole for the input reducer. (Refer to P.2)
※4 The model number and dimensions of the input reducer
depends on the manufacturer of the motor. (Refer to P.2)

Date

Attention:
Our contact
person:Model Sizing Form for the RollerDrive RW series®

Customerʼs Company, Department

TEL

Address

FAX

Name

Email

A ）Application
B ）Overview drawing, loads, operating environment, etc.
（Draw a sketch of the table, workpieces, ﬁxtures, etc.,
to mount on the output shaft of the RW, and indicate
any loads that will occur during rotation.）

C ）Motion pattern

Table diameterIndex period (angle of rotation per cycle)[mm]Table mass[deg]Indexing time (time to move the indexing angle)

[kg]

[sec]
Dwell time

P.C.D of ﬁxtures
[mm]

[sec]
Cycle Time（Indexing time＋Dwell time）

Mass per ﬁxture
[kg]

[sec]
Allowable e-stop time or angle

Number of ﬁxtures

[deg]

[sec]

[pcs.]
P.C.D of workpieces

D ）Speciﬁed servomotor[mm]

Mass per workpiece□Yaskawa Electric（Σ-Ⅴ）□Yaskawa Electric (Σ-7)□Mitsubishi Electric (J4)[kg]
Number of workpieces□FANUC□Mitsubishi Electric (J5)[pcs.]□Other models（）

Total payload
Choose one[kg]
Total moment of inertia[kg・㎡]

RW-2021/05E-S

Group Companies

Global network

Sankyo 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 China Trading Co., Ltd.
Hangzhou Sankyo Machinery Co., Ltd.
Sankyo America Inc.
Italy

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

Sankyo Seisakusho Co.
Sankyo Shizuoka Seisakusho Co.
Sankyo Korea Co., Ltd.
Taiwan[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

Rodax Vietnam Co., Ltd.

Headquarters
Global Sales Offices
Production Facilities
International Distributors

India

Sankyo Works（Thailand）Co., Ltd.
Singapore
Thailand

Mon-Fri AM8:30-12:00 PM13:00-17:30 UTC + 09:00 (JST)（Except public holidays and company holidays）

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

Contact us■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

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 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■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

RW‐2021／05E（DT）