RollerDrive

RollerDrive®

RTB series
Tilting rotary table for small MCs

RTB

Tilting rotary table for small MCs

RollerDrive RTB series®

The RTB series is a compact, lightweight, tilted rotary table built to respond to the increasing number of machining variations with small MCs,
the increasing complexity and size of workpieces. Even for workpieces that require multiple processes, use of the RTB series, equipped with A
and C axes, enables process consolidation, efficient machining postures and optimized tool selection.
In addition, in order to meet the needs of unmanned machines and the introduction of robots, we have developed a rotary joint with up to 6
ports that can be used for automatic workpiece loading/unloading and seating confirmation. Further, the use of the RollerDrive mechanism
eliminates the need for clamping during machining, so the indexing time can be reduced by approximately one-third, compared with theconventional worm gear mechanism on rotary tables with a clamping operation. Since continuous operation only needs a lubrication oil change
from time to time, the RTB RollerDrive eliminates the need for periodic recalibration, unlike a conventional worm gear rotary table. This
contributes to an extended operating time for equipment. The RTB is ideal for small MCs, by providing improvements in automation andproductivity.

Features・No-backlash RollerDrive mechanism
・Clampless processing drastically increases the ratio of cutting to non-cutting time・Lightweight and compact, and can be mounted on the #30 vertical MCs
・Rotary joint up to 6 ports
・Routine maintenance is just an oil change, nothing else.

CNC ROTARY TABLE
RSR series

RCD series

RTD series

RTA seriesHigh productivity circular table withan installed rotary joint 12+1p model
for compact MCs

Standard model with improved
performance thanks to are-engineered design

A two-axis tilting rotary table securely
held at both ends achieves both a thin,compact body that is highly rigid

Large, high-power tilting rotary tablewith a dual-axis tilting drive.

1

RollerDrive RTB®

No Maintenance and Excellent Price Performance
Exclusive Backlash Zero Structure
Turret(output)Cam
followers

Input camMultiple roller followers, come into
contact from both sides (in pairs)
without gaps to provide efficientrolling transmission withoutbacklash.

PreloadCam followers

Roller gear cam (input)

Features・Clampless processing reduces positioning time.

・No backlash (play).

Rolling contact

・High accuracy and good efficiency. ・Accuracy does not deteriorate over timeand maintains initial accuracy for a long・Preloadable for high rigidity.
period of time.

Preload

Cost Comparison with a Worm Gear Rotary Table

Consistent long-term accuracy
without maintenance.

Offers Long-term Use without MaintenancePositioning Accuracy Aging Test

200

30

10

rm

Wo

r
ea

g

ary

rot

l

tab

)

ple

am

ex
e(

Roller gear rotary table

MaintenancePositioning Error↓

Drop in accuracy
over time

Worm gear rotary table

Maintenance↑High

Requires maintenanceat regular intervals（arc sec）

20

Initial Cost versus Annual Maintenance Costs

100

Cost becomes less than the worm
gear table in three years.

RollerDrive

Low

0

0

1 Million

2 Million

Consistent long-term accuracy
without maintenance.

3 Million

4 Million

0

5 Million

1

2

3

4

5

6

7

year

①Worm gear rotary tables require maintenance twice a year.
②Assumes an annual running cost of 3% (oil changes, etc.) for both types.

Operating cycles

Cost simulations are based on a table diameter of about 200 mm.

The RollerDrive graph is based on internal testing.
(Center distance of test unit: 170)

■ Worm gear models■ Worm gear models

Maintenance costs occur once or twice a year to adjust the backlash.

Accuracy declines over time. Requires maintenance toachieve initial accuracy.

■ RollerDrive■ RollerDrive

Long-term use is possible without any mechanical maintenance.
Beats the cost of a worm gear even after adding annual running costs
to the initial investment cost. Price performance continues thereafter.

Accuracy is consistent with no maintenance even after
5 million operation cycles.

Based on internal calculations.

Compared against a worm gear for over
5 million indexes.
■ Test conditions

・Table size: Output table diameter: 170 mm
・Load inertia: 0.5 kgm2
・Index period: 36°(unidirectional)・Indexing time: 0.35sec■ Results after 5 million indexes:
Item

Worm gear

RollerDrive

Variation in positioning accuracy

24.2sec

0.9sec18μm（15μm→33μm）

ーBacklash (measured at R60)

■ Variation in positioning accuracy
Variation in positioning accuracy [sec]Extended Accuracy

Based on internal testing data.

2

Variation after 5 million indexes:

30
25

Worm gear20

24.2sec

15
10RollerDrive

0.9sec5
0

1 Million

2 Million

3 Million

4 Million

5 Million

Product code
Rotary table
1

RTB170 -2

1

Servo Motor

5S
4

Connector position

6

F

1

5

6

Connector type

Table shape

Tilted axis side Support axis side

RTB100

A

A1

FANUC

S

Side

S

Side

F

Flexible

1

Tapped holes

RTB170B

B1

MITSUBISHI

B

Back

B

Back

R

Receptacle

2

T slotC−

External controller type

F

Front

D

−

SANYO (Brother type)

10

W

-

11

※1

Others（Custom）

-M

J

8

9

01

7

8

Option9
Mounting clamps

Guide blocks

Rotary joint

10

11

Motor

Standard/
CustomNumber of ports

1

For 14mm T-groove1

For 14mm T-grooveW

RTB100…3P

2

For 18mm T-groove2

For 18mm T-groove

Blank

RTB170…6P

0

Not included0

Not included

Supplied by
SankyoSupplied bycustomer

Blank

Standard

X

Custom…

None

X

Clamp block

…

Blank

4

3

With Without
brake brake※1

X

J

F

2

Model

7

3

A

A complete set of hardwares

Set of guide blocks

RTB100 RTB170
2 guide blocks

Hardwares

4 pcs.

4 pcs.

2 Allen-head bolts (M6)

T- slot nuts（M12）4 pcs.

6 pcs.

Hexagon bolt（M12）4 pcs.

4 pcs.

Washers（M12）4 pcs.

4 pcs.

Hexagon socket
head bolt (M12)−4 pcs.

Connector position
Tilting axis

Connector type

Table shape

Support axis

A
S

S

B

F
1
A

B

RTB100 （8）M5,10DP

B

B
φ76

RTB170 （8）M8,14DP φ140

RF

※1 Please contact us for details about external controller speciﬁcations.
※2 RTB100 is not available with a T-groove table.

3

2

The table dimension is
described in page #6.
※2

RollerDrive RTB®

Speciﬁcations
Speciﬁcation
RTB100Speciﬁcations

Rotary axis

RTB170Tilt axis

Rotary axis

Tilt axis

Tilting angle

deg−30 to +120

−30 to +120

Table diameter

mm

φ100

φ170

Table pilot bore diametermm

φ60 +0.03
0

φ60 +0.03
0Center height at tilted axis +90°

mm

135

185

Tabletop height at 0°tilted axis

mm

190

265

Guide block widthmm0
14 −0.0180
14 −0.018

Gear ratio

−

1/40

1/50

1/50

1/60

×10−4 kg・m2

2.20

1.30

2.96

5.11

Inertia at motor shaft ※1、※2

αiS2/5000
αiF8/3000
αiS2/5000
αiS4/5000（A06B-2212-B400）（A06B-2212-B400）（A06B-2215-B400）（A06B-2227-B400）−

Maximum table speed

min−1

100

100

70

50

Indexing accuracy

arc.sec

±15

±30

±15

±30

Repeatability

arc.sec

8

8

8

8

Net weight

kg

90

180

kg

35

110

kg

20

70

kg・m2

0.09

0.65

N・m

59

246

N

7800

9000

Continuous
holding torque ※2、※3

N・m

98

236

Maximum
output torque ※2、※3

N・m

177

362

Continuous
holding torque ※2、※3

N・m

122

512

Maximum
output torque ※2、※3

N・m

221

987

3

6

Allowable payload

Motor model（FANUC）

W

When horizontal

When tilted

W

J

Allowable workpiece inertia

L

Maximum eccentricload torque

W×L
W

F

F×L

L

L

F×L

Tilt axis

F

Rotary axis

Allowable load

F

Built-in rotary joint(number of ports)＊1. The speciﬁed motor shaft equivalent inertia does not include the inertia of the motor shaft.

＊2. The converted motor shaft inertia, and the continuous and maximum holding torque are the values when using a FANUC motor.
Please contact us if you want to use other motors.
＊3.Maximum holding torque shall be a maximum of 10 seconds at a 20% duty cycle.

4Dimensions
RTB100-AFSF1-J

Unit：mm

88.7

120

0°
12

190

φ7 6
R78

81.5

.5

92.5

102

A

3×φ8.2+0.05
0

291.4

3+0.050
1.4 ±0.05

80

393.4

95.5

5

B

C

φ
47

.5

（8）
M5,10DP

Detailed view of therotary joint outlets A to C

507.6
98.3

3 +0.05
0

75

R11

3

20

227.5

228

0°

12
B

190

φ21.5

135
φ50（rot ating p art）

C

30°
12

φ100
φ60H7

3×Rc1/8（rotating part）

A

65

0°

Rotary joint supply
outlets A to C.

183.6

100

77

R90

125.7

GL

32.5

0
14 −0.018

5
Oil level (tilted axis)

224

90

90

102

102

Oil level (rotating axis)＊The above dimensions are for a machine equipped with a FANUC motor.
＊Speciﬁcations and dimensions are subject to change without notice, so please check again when ordering.

Area for mounting workpieces
0°to 110°

0°to 120°

Table surface

60

90

82

58

36

30°

20°

15°

−30°to 0°360°to 105°

102

Tilting axis angle 0°to 90°

φ150

φ150

φ130

φ85

φ150

φ200

φ195

φ170

φ110

φ200

φ260

φ120

・Set parameter to avoid interference.

Hardware details

10

22

10

22.5

15

45

30

5

29

15.8

11.1

M12

8.5
13.5

30

40

50

0

M12

28.6

20

17

14 THRU

14−0.018

φ7

φ11

0
18−0.018

φ7

3

15

22

φ11

0

14−0.018

3

T-slot nut
T-slot nut（for 14 mm T-groove）（for 18 mm T-groove）

Clamping block

22.2

Guide key
Guide key（for 14 mm T-groove）（for 18 mm T-groove）

32

19.1

RollerDrive RTB®

RTB170-AFSF2-J

Unit：mm

5 +0.05
0

100

100

100

134.5

150

D

.5

Detailed view of therotary joint outlets A to F

203.6

105

φ170
φ60H7

R118

6×Rc1/4（back side）

5+0.05
0

R118

105

45°

Detailed view ofT-groove

646.1
158

φ
47

E
21

125

28.1

C

9

20

116

100

F

125

Rotary joint supply
outlets A to F.

B

12

117.5

35 55

95

R110

φ90

1.4 ±0.05

45°

A

190

535.5

(8)Φ14 THRU,
C-BORE Φ20, 13DP

6×φ8.2 +0.05
0

419.5

95.5

95.5

152.5

8

0
12

30°

°

A
B

R135
302.5

D
E

52.5
Oil level (rotating axis)

Oil level (tilted axis)

5

25

185

F

308

GL

0
14 −0.018
189.5

5

265

310

C

0
14 −0.018

116

116

＊The above dimensions are for a machine equipped with a FANUC motor.
＊Speciﬁcations and dimensions are subject to change without notice, so please check again when ordering.

Area for mounting workpieces

95

85

40

70

40

30°

20°

Table surface−30°to 0°

φ210

φ210

φ210

φ150

φ210

φ280

φ240

φ255

φ170

φ280

φ360

φ285

φ190

φ310

70

15°

0°to 120°40

0°to 110°115

0°to 105°

85

Tilting axis angle 0°to 90°

・Set parameter to avoid interference.

Hardware details

22

10

22

28

38

29

15
30

35

6

15.8

11.1

M12

8.5
13.5

0

19
10

M12

28.6

25

17

14 THRU

14 −0.018

φ7
φ11

0
18−0.018

φ7

3

φ11

0

14−0.018

3

T-slot nut
T-slot nut（for 14 mm T-groove）（for 18 mm T-groove）

Clamping block

22.2

Guide key
Guide key（for 14 mm T-groove）（for 18 mm T-groove）

32

19.1

Compatible Servomotor Models
With brake
FANUC

MITSUBISHISANYO (Brother type)

Rotary axis

αiS2/5000（A06B-2212-B400）−

R2AA08075FCRGYM6

Tilt axis

αiS2/5000（A06B-2212-B400）−

R2AA08075FCRGYM6Rotary axis

αiS4/5000（A06B-2215-B400）

HG105BS-S105010

R2AAB8100FCRGYM

Tilt axis

αiF8/3000（A06B-2227-B400）

HG104BSR2AAB8100FCRGYM

FANUC

MITSUBISHISANYO (Brother type)

Rotary axis

αiS2/5000(A06B-2212-B100)−−

Tilt axis

αiS2/5000(A06B-2212-B100)−−

Rotary axis

αiS4/5000(A06B-2215-B100)

HG105S-S105010−

Tilt axis

αiF8/3000(A06B-2227-B100)

HG104S−Model

RTB100

RTB170Without brake
Model

RTB100

RTB170＊1. If a motor brake control is not possible, select the code for a servo motor that doesn t have a brake.
However, please note that this mechanism does not self-lock, so the table may rotate depending on its posture in the event of a power failure.

Precision Rating
RTB100

RTB1700.015mmover full length

0.015mmover full length

Parallelism between table top andbottom surface of base0.015mm

0.015mm3

Runout of table top

0.01mm0.01mm4

Runout of table pilot bore

0.01mm0.01mm5

Parallelism between tilt axis center line
and bottom surface of base

0.02mmover full length

0.02mmover full length

6

Parallelism between table
top and guide block

0.02mm0.02mm7

Indexing accuracy

Rotary axis

±15arc.sec±15arc.sec

Tilt axis±30arc.sec±30arc.sec

8

Repeatability

Rotary axis

8arc.sec

8arc.sec

Tilt axis

8arc.sec

8arc.sec

No.

Measurement

1

Straightness of table top

2

Method7

RollerDrive RTB®

Precautions
Air supply
Sankyo's CNC rotary tables come standard equippedwith an air purge outlet. (Use it to blow out
condensation and coolant to prolong the life ofelectrical parts and prevent rust in the motor housing.)
Supply clean air for the air purge by referring to thedrawing shown.
(Do NOT block the exhaust outlet.)

Input pressure: 0.4 to 0.5 MPa
Consumption flow: Approx. 5L/min

Lubrication
Sankyo's CNC rotary tables use high-performance lubrication oil. Although the lubricant is chemically and thermallystable, it should be changed every 3,000 hours of operation in order to ensure longer product life. Even if operated
less than 3,000 hours, the oil should be changed once per year. The condition of the oil can be checked with the oillevel gauge while the unit is in the stop condition. Check the oil level and color. If the level is low or the color haschanged, change the oil regardless of the number of operation hours. Some air bubbles may form in the oil during
operation. This is normal and does not aﬀect quality.
* Be sure to use only the lubricant speciﬁed below. Otherwise service life may be reduced and parts may deteriorate.
Speciﬁed lubricant: Mobil SHC629 (VG150)

Use in grinding machines
When used in grinding machines, the seal device on the outer periphery of the table may become damaged.
The warranty does not cover such damage.

Maximum rotation speed
The maximum rotation speed for the table given in the speciﬁcations refers to the indexing speed. Consult withSankyo if the table is to be rotated continuously. Otherwise, the table will heat up and lose accuracy, causing
overload alarms with the servo motor.

Rotary joint
Use hoses for plumbing in the stationary sections. If oil ﬁlm leaks from the pneumatic circuit, it will cause a serious
problem. Install a bleed circuit between the two circuits. Avoid continuous rotation as it may cause heat buildup in
the internal seals. The gasket port mounting surface (O-ring seal surface) should be a ﬂat with a surface roughness
not higher than Rz 6.3. The ﬂuid used and the pressure must be within the following range.
Each RJ port: Hydraulic pressure; up to 6.0 MPa, pneumatic pressure; up to 0.7 MPa

General Precautions■ Under the Japanese trade regulation, RollerDrive CNC can be restricted to supply or export to a country which
may produce weapons or related products.
■ Dimensions and speciﬁcations are subjected to be modiﬁed without notice.
■ Contents of this catalogue is published in October 2023.
■ Whole or part of the contents, mechanisms, logos, drawings belongs to Sankyo-Seisakusho, Japan. No part of thecatalogue is allowed to copy or redistributed to the third party without the permission of Sankyo Seisakusho.

8

Technical information
Backlash, lost motion, hysteresis loss
General hysteresis graphyTorsion angle

Hysteresis loss

Rated torquex

Lost motion

Backlash

−

＋3％

−3％

＋
50％

Rated torque

Torque acting on output※ Backlash

Rotation angle which can arise even with zero torque (looseness)

Lost motion

Torsion angle of the midpoint of the hysteresis curve width which arises when applying ±3% rated torque

Hysteresis loss

Torsion angle where there is no complete return, when torque is applied in both forward and reverse directions

RollerDrive hysteresis graph®

0.0003

Torsion angle［rad.］0.0002

Table diameter φ250mm class0.00010.0000−0.0001−0.0002−0.0003
−100

−50

0

50

100

Torque acting on outpu［N・m］

For a general positioner, the hysteresis graph can be obtained by applying torque to the output
shaft, and plotting the generated torsion angle. Backlash, lost motion and hysteresis loss can eachbe deﬁned from the hysteresis graph, as indicated above. Lost motion and hysteresis loss dependon the material characteristics, and occur in all types of structures. Backlash, on the other hand,occurs only when there are gaps or looseness in the structure. Backlash has a major eﬀect on
accuracy, servo gain and similar factors, and must be minimized. With RollerDrive , backlash is®

completely eliminated using our unique preload structure, and lost motion and hysteresis loss arecontrolled to extremely small values due to the results of research on optimizing materials andstructures.

9RollerDrive RTB®

Eﬃciency
This indicates the percent of input power〈 Table diameter φ250mm class 〉

which is transmitted to the output.

Output rotation speed

100

The RollerDrive motion mechanism has high®

5 min-1
10 min-1
20 min-1
50 min-1

90

eﬃciency because it employs rolling contact.
Eﬃciency［％］

80

Eﬃciency varies depending on conditions suchas load torque, rotation speed and temperature.

70
60
50
40
30
20
10
0

0

200

400

Torque［N・m］

Durability

Output positioning accuracy［ arc.sec ］〈 Test of changes inpositioning accuracy over time 〉

30
Exactness, forward direction（CCW）
Exactness, reverse direction（CW）
Repeat accuracy, forward direction（CCW）
Repeat accuracy, reverse direction（CW）

20

10

0

0

620,000

1,320,000

1,500,000

2,000,000

2,700,000

3,000,000

4,000,000

5,000,000

Number of operations［Times］

Test conditions
RollerDrive size

RA125 class test machine

Output load weight

152 kg（φ500㎜）

Output load moment of inertia

4.69kg・㎡

Output rotation angle

0-345degree（Reciprocating

Output maximum rotation speed

100min−1

Acceleration time

0.100sec

Uniform speed time

0.475sec

Deceleration time

0.100sec

In the RollerDrive ®, all rotating elements operate in a state of rolling contact, and thus there is almost
no wear, or degradation in accuracy over time.
There is almost no change in positioning accuracy after testing operation 5 million times, and thisshows that the outstanding accuracy of the RollerDrive ® can be maintained over the long term.

10

Global network
Group Companies

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

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 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]Room101, Unit 2, No.159 Tianzhou 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.
TaiwanRodax Vietnam Co., Ltd.
Headquarters
Global Sales Offices
Production Facilities
International Distributors

India

Sankyo Works（Thailand）Co., Ltd.
Singapore
Thailand[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
Hangzhou Sankyo Machinery Co., Ltd.
No.2518 Jiang Dong 2 Road, Hangzhou Jiang Dong Industrial Park,
Xiaoshan Zone, Hangzhou, Zhejiang, China
Phone： +86-(0)571-8283-3311 Fax： +86-(0)571-8283-1133
Rodax Vietnam Co., Ltd.
Plot No. M1, Thang Long Industrial Park Ii
Di Su, My Hao, Hung Yen, Viet Nam
Phone： +84-(0)221-3-589701 Fax： +84-(0)221-3-589708
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)3-3800-3305
Fax: +81-(0)3-3800-3378
Email: overseas@sankyo-seisakusho.co.jp
URL: https://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

https://www.sankyo-seisakusho.co.jp
Speciﬁcations and dimensions are subject to change without notice.
Consult Sankyo sales before ordering.
Patent rights and copyrights for some mechanisms, trademarks, images,
drawings and other material in this catalog all belong to Sankyo Seisakusho Co.
"RollerDrive" is a registered trademark of Sankyo Seisakusho Co. in Japan.

RTB-2023／10E（DT）