• Couplings
  • Bellows Type

MBB-C

Bellows-Type Flexible Coupling

Bellows-Type Flexible Coupling

  • Zero Backlash
  • High torsional rigidity
  • High Torque
  • Constant Velocity
  • Simple

Dimension Drawing

MBB-CFlexible Couplings - Bellows Type寸法図

Specs/CAD

Part Number ALWEFGM Wrench
Torque
(N·m)
Standard
Bore Diameter
D1・D2
Price
(USD)
CAD Add to Cart
MBB-19C 19 10.5 30 12 3 6.75 M2 0.5 - 70.11 CAD Cart
MBB-27C 27 12.5 35 17 3.5 10.25 M2.5 0.9 - 67.44 CAD Cart
MBB-32C 32 15.5 46 22 4.25 12 M3 1.5 - 89.99 CAD Cart
MBB-40C 40 16 51 28 5 15 M4
M3
3.5
1.5
- 110.03 CAD Cart

Part Number Max. Bore
Diameter
(mm)
Rated
Torque*1
(N・m)
Max.
Rotational
(min-1)
Moment*2
of Inertia
(kg・m2)
Static Torsional
Stiffness
(N・m/rad)
Max. Lateral
Misalignment
(mm)
Max. Angular
Misalignment (°)
Max. Axial
Misalignment
(mm)
Mass*2
(g)
MBB-19C 8 1.5 33000 8.6×10-7 170 0.15 1.5 ±0.5 16
MBB-27C 14 2.3 23000 3.6×10-6 800 0.15 1.5 ±0.5 32
MBB-32C 16 4.5 19000 1.1×10-5 1600 0.2 1.5 ±0.7 68
MBB-40C 5-20
22-24
10 15000 2.8×10-5 2700 0.2 1.5 ±1 110

*1: Correction of rated torque due to load fluctuation is not required. For more detailed information, please refer to Selection Guidelines.
*2: These are values with max. bore diameter.

Unit : mm

Part Number Standard Bore Diameter(mm)
D1・D2
3 4 5 6 8 10 12 14 15 16 17 19 20 22 24
MBB-19C
MBB-27C
MBB-32C
MBB-40C

Unit : inch

Part Number Standard Bore Diameter(inch)
D1・D2
1/8 3/16 1/4 3/8 1/2 5/8 3/4 7/8
MBB-19C
MBB-27C
MBB-32C
MBB-40C

All products are provided with hex socket head cap screw.
Recommended tolerance for shaft diameters is h6 and h7.

Slip torque

Concerning the sizes shown in the table, please note that the shaft's slip torque is smaller than the rated torque of MBB-C.

Unit : N・m

Part Number Bore Diameter(mm)
3 5 6
MBB-19C 0.8
MBB-32C 2 4.2
MBB-40C 9.8

These are test values based on the condition of shaft's dimensional allowance: h7, hardness: from 34-40 HRC, and screw tightening torque of the values described in MBB-C dimensional table.


Structure

Clamping Type

MBB-C Aluminum alloy hub

MBB-CFlexible Couplings - Bellows Type


Material/Finish

MBB
Hub A2017
Alumite Treatment
Bellows SUS304
Hex Socket
Head Cap Screw
SCM435
Ferrosoferric Oxide
Film (Black)

Characteristics

  • Applicable motors
MBB
Servomotor
Stepping Motor
General-purpose Motor -

◎: Excellent ○: Very good

  • Property
MBB
Zero Backlash
Allowable Misalignment

◎: Excellent ○: Very good

  • This is a bellows type flexible coupling.
  • The bellows allows eccentricity, angular misalignment, and end-play.
  • The bellows is stainless steel.

Application

Actuator / High precision XY stage / Semiconductor devices / Encoder

Selection

Selection Example

In case of selected parameters of shaft diameter of φ10 and load torque of 2 N・m, the selected size for MBB is MBB-27C.

MBB-CFlexible Couplings - Bellows Type


Eccentric Reaction Force

MBB-CFlexible Couplings - Bellows Type


Thrust reaction force

MBB-CFlexible Couplings - Bellows Type


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 MBB 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.

MBB-CFlexible Couplings - Bellows Type


Product List

MBB-40C

Customer Service

  • Usage Method
  • Technical Question
  • Customization Products

NBK America LLC

9:00 to 17:00 on weekdays, Eastern Standard Time