• Couplings
  • Disk Type

XBS-39C2

Flexible Couplings - Single-Disk Type - Clamping Type

Safety PrecautionsGlossaryMounting/maintenance

RoHS Compliant

  • Zero Backlash
  • High torsional rigidity
  • High Torque
XBS-C/XBSS-C_CFlexible Couplings - Single-Disk Type

Dimension Drawing

XBS-CFlexible Couplings - Single-Disk Type - Clamping Type寸法図

Specs/CAD

Part Number ALWFGM Screw Tightening
Torque (N・m)		Standard Bore Diameter
D1-D2		 Price
(USD)		 CAD
Download		 Add to Cart Additional Modification
XBS-39C2 39 15 32.8 5 14.5 M4 3.5 - 95.82 CAD Cart       

Part Number Max. Bore Diameter
(mm)		 Rated
Torque＊1
(N・m)		Max. Rotational Frequency
(min-1)		 Moment of
Inertia
(kg・m2)＊2		Static
Torsional
Stiffness
(N･m/rad)		Max. Lateral Misalignment
(mm)		Max. Angular
Misalignment
(°)		 Max. Axial
Misalignment
(mm)		Mass
(g) ＊2
XBS-39C2 20 8 16000 9.8×10-6 4600 0.02 1 ±0.3 83

＊1：　Correction of rated torque due to load fluctuation is not required. For more detailed information, please refer to Selection Guidelines.

※ The shaft's slip torque may be smaller than the coupling's rated torque depending on the shaft bore. XBS-C

＊2：　These are values with max. bore diameter.

Part Number Standard Bore Diameter D1･D2
3 4 5 6 8 10 11 12 14 15 16 18 19 20 22 24 25 28 30 32 35 38 40 42 45 50
XBS-39C2 - - - - ● ● ● ● ● ● ● ● ● ● - - - - - - - - - - - -

● All products are provided with hex socket head cap screw.
● Recommended tolerance for shaft diameters is h6 and h7.
● Bore and keyway modifications are available on request. Please take advantage of our modification services.
● For the shaft insertion amount to the coupling, see Mounting/maintenance. ⇒Mounting and Maintenance


Part Number
Amount
Price（＄）

Check other products Cart

　　　　　　

Additional Modification Service

Modified Part Number

Enter the desired bore diameter and then click [Check Modified Part Number].

Standard bore diameter(D1) Standard bore diameter(D2) Modified Part Number Price Add to cart

unit:mm
Applicable Bore Diameter
D1D2		 keyway Key
b t Nominal Dimension
b×h
Standard Dimension Allowance
(JS9)		 Standard Dimension Allowance
6 7       2 ±0.0125 1.0 +0.1
0 		2×2
8 9 10     3 ±0.0125 1.4 3×3
11 12       4 ±0.0150 1.8 4×4
13 14 15 16 17 5 ±0.0150 2.3 5×5
18 19 20 22   6 ±0.0150 2.8 6×6
24 25 28 30   8 ±0.0180 3.3 +0.2
0 		8×7
32 35 36 38   10 ±0.0180 3.3 10×8
40 42 44     12 ±0.0215 3.3 12×8
45 48 50     14 ±0.0215 3.8 14×9
55 16 ±0.0215 4.3 16×10

unit:inch
Standard Inch Bore Diameter
D1D2		 Keyway
Wk T
Standard Dimension Allowance Standard Dimension Allowance
1/2 1/8 +0.002
  0		 0.560 +0.01
  0
9/16 1/8 +0.002
  0		 0.623 +0.01
  0
5/8 3/16 +0.002
  0		 0.709 +0.01
  0
11/16 3/16 +0.002
  0		 0.773 +0.01
  0
3/4 3/16 +0.002
  0		 0.837 +0.01
  0
13/16 3/16 +0.002
  0		 0.900 +0.01
  0
7/8 3/16 +0.002
  0		 0.964 +0.01
  0
15/16 1/4 +0.002
  0		 1.051 +0.01
  0
1 1/4 +0.002
  0		 1.114 +0.01
  0
1-1/8 1/4 +0.002
  0		 1.241 +0.01
  0
1-1/4 1/4 +0.002
  0		 1.367 +0.01
  0
1-3/8 5/16 +0.002
  0		 1.518 +0.01
  0
1-1/2 3/8 +0.002
  0		 1.669 +0.01
  0
1-5/8 3/8 +0.002
  0		 1.796 +0.01
  0
1-3/4 3/8 +0.002
  0		 1.922 +0.01
  0

Slip torque

As in the table below, the clamping types XBS-C and XBSS-C have different slip torque according to the bore diameter. Take care during selection.

Unit : N・m

Part Number Bore Diameter (mm)
3 4 6 8 10 11 14 15
XBS-15C2 1
XBS-19C2 1.6
XBS-34C3 5.2 6
XBS-44C2 15
XBS-56C3 25 32
XBS-68C5 80 100

These are test values based on the conditions of shaft dimensional allowance: h7, hardness: 34-40 HRC, and screw tightening torque of the values described in XBS-CXBSS-C dimension tables. They are not guaranteed values.
Slip torque changes with usage conditions. Carry out tests under conditions similar to actual conditions in advance.

Unit : N・m

Part Number Bore Diameter (mm)
4 6 8 10 11 12 14 15
XBSS-19C2A 1
XBSS-34C3A 5
XBSS-39C2A 5.5 8
XBSS-44C2A 4.5 6 10
XBSS-56C3A 9 13 18 25 28

Structure

Clamping TypeXBS-CXBSS-C

XBS-C Aluminum Alloy Hub
XBSS-C Made of All Stainless Steel

XBS-C/XBSS-C_CFlexible Couplings - Single-Disk Type


Material/Finish

XBS-C
Hub A7075＊1
Disk Fixing Bolts SCM435
Ferrosoferric Oxide Film (Black)
Disk SUS304
Collar SUS304
Hex Socket Head Cap Screw SCM435
Ferrosoferric Oxide Film (Black)

*1: Anodized products are also available. Please contact our customer service.


Characteristics

  • Recommended Applicable Motor
XBS-C XBSS-C
Servomotor ◎ ◎
Stepping Motor ◎ ◎
General-purpose Motor ● ●

◎: Excellent ○: Very good ●: Available

  • Property
XBS-C XBSS-C
Zero Backlash ◎ ◎
High Torque ○ ○
High Torsional Stiffness ◎ ◎
Allowable Misalignment ○ ○
Corrosion Resistance (All S.S.) - ◎

◎: Excellent ○: Very good

  • This is a disk type flexible coupling.
  • It has compact design with short entire length.
  • The stainless steel disk allows eccentricity, and angular misalignment, and end-play.
  • Wide variation of outside diameter φ 15 - φ 104 and bore diameter φ 3 - φ 50.
  • Extra super duralumin (A7075) featuring the highest strength among aluminum alloy is adopted for XBS-C hubs.
  • XBSS-Cis the all stainless steel type with stainless steel hubs.

Application

Actuator / Surface-mount machine / High precision XY stage / Index table

Selection

XBS-C/XBSS-C_CFlexible Couplings - Single-Disk Type

XBS-C/XBSS-C_CFlexible Couplings - Single-Disk Type

XBS-C/XBSS-C_CFlexible Couplings - Single-Disk Type

Selection Example

In case of selected parameters of shaft diameter of φ30 and load torque of 40 N•m, the selected size is XBS-68C5.

Selection Based on the Rated Output of the Servomotor

Rated Output
(W)		 Servomotor Specifications＊1 Selection Size
Diameter of Motor Shaft
(mm)		 Rated Torque
(N・m)		 Instantaneous Max. Torque
(N・m)		 XBW-C XBWS-C
Aluminum Alloy Hub Made of All Stainless Steel
10 5 - 6 0.032 0.096 XBS-15C XBSS-15C
20 5 - 6 0.064 0.19 XBS-15C XBSS-15C
30 5 - 7 0.096 0.29 XBS-19C XBSS-19C
50 6 - 8 0.16 0.48 XBS-19C XBSS-19C
100 8 0.32 0.95 XBS-19C XBSS-25C
200 9 - 14 0.64 1.9 XBS-27C XBSS-34C
400 14 1.3 3.8 XBS-34C XBSS-39C
750 16 - 19 2.4 7.2 XBS-39C XBSS-56C

＊1：　Motor specifications are based on general values. For details, see the motor manufacturer's catalogs. This is the size for cases where devices such as reduction gears are not used.


Thrust reaction force

XBS-C/XBSS-C_TTechnical Information

XBS-C/XBSS-C_TTechnical Information

XBS-C/XBSS-C_TTechnical Information


Change in static torsional stiffness due to temperature

This is a value under the condition where the static torsional stiffness at 20°C is 100%.
The change of XBS-C and XBSS-C in torsional stiffness due to temperature is small and the change in responsiveness is extremely small. If the unit is used under higher temperature, be careful about misalignment due to elongation or deflection of the shaft associated with thermal expansion.

XBS-C/XBSS-C_TTechnical Information


Static torsional stiffness comparison (single disc-type)

XBS-C/XBSS-C_TTechnical Information


Related Products

The Single-Disk type Flexible Coupling XHS-C is compatible with the servomotor with 350% instantaneous max. torque is available.
XHS-C

XBS-C/XBSS-C_CFlexible Couplings - Single-Disk Type


Related Services

Product List

XBS-104C8

XBS-15C2

XBS-19C2

XBS-25C2

XBS-27C2

XBS-34C3

XBS-39C2

XBS-44C2

XBS-56C3

XBS-68C5

XBS-82C5

XBS-94C7

XHW-C

Part Name

Flexible Couplings - Disk Type

Part Number

XHW-C

Feature

Zero Backlash
High Torque
High Torsional Stiffness

SPE-F

Part Name

Plastic Screw - Cross Recessed Flat Head Machine Screws - PEEK

Part Number

SPE-F

Feature

Chemical Resistance
Heat Resistance

XHS-C

Part Name

Flexible Couplings - Single-Disk Type

Part Number

XHS-C

Feature

Zero Backlash
High Torque
High Torsional Stiffness

SETS(INCH)

Part Name

Hexalobular Socket Head Cap Screw with Extra Low Profile (Inch Thread/Stainless Steel)

Part Number

SETS(INCH)

Feature

Hexalobular Socket
Extra Low Profile
Small Space
Inch Screws

Click here to see XBS-C

XBS-27C2

Part Name

Flexible Couplings - Single-Disk Type - Clamping Type

Part Number

XBS-27C2

Feature

Zero Backlash
High Torque
High Torsional Stiffness

XBS-34C3

Part Name

Flexible Couplings - Single-Disk Type - Clamping Type

Part Number

XBS-34C3

Feature

Zero Backlash
High Torque
High Torsional Stiffness

XBS-44C2

Part Name

Flexible Couplings - Single-Disk Type - Clamping Type

Part Number

XBS-44C2

Feature

Zero Backlash
High Torque
High Torsional Stiffness

XBS-56C3

Part Name

Flexible Couplings - Single-Disk Type - Clamping Type

Part Number

XBS-56C3

Feature

Zero Backlash
High Torque
High Torsional Stiffness

Click here to see Disk Type

XHW-AC

Part Name

Flexible Couplings - Disk Type - Adapter + Clamping Type

Part Number

XHW-AC

Feature

Zero Backlash
High Torque
High Torsional Stiffness

XBWS-C

Part Name

Flexible Couplings - Disk Type - Clamping Type

Part Number

XBWS-C

Feature

Zero Backlash
High Torque
High Torsional Stiffness

XHW-C-L

Part Name

Flexible Couplings - Disk Type - Clamping Type

Part Number

XHW-C-L

Feature

Zero Backlash
High Torque
High Torsional Stiffness

XBW-C

Part Name

Flexible Couplings - Disk Type - Clamping Type

Part Number

XBW-C

Feature

Zero Backlash
High Torque
High Torsional Stiffness

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