MFBS
Flexible Coupling – Bellows – type
Dimension Drawing
Dimensions/Specifications/CAD
| Part Number | A | L | W | E | F | M | Wrench Torque (N･m) |
|---|---|---|---|---|---|---|---|
| MFBS-12 | 12 | 7.5 | 23.5 | 7 | 2.5 | M2.5 | 0.5 |
| MFBS-16 | 16 | 9 | 26.5 | 9.5 | 3 | M3 | 0.7 |
| MFBS-20 | 20 | 10 | 32 | 12.5 | 3.5 | M3 | 0.7 |
| MFBS-25 | 25 | 12 | 36.5 | 15 | 4.5 | M4 | 1.7 |
| MFBS-32 | 32 | 13.5 | 42 | 21 | 5.5 | M4 | 1.7 |
| Part Number | Max. Bore Diameter (mm) | Rated Torque* (N・m) | Max. Torque * (N・m) | Max. Rotational (min-1) | Static Torsional Stiffness (N・m/rad) | Max. Lateral Misalignment (mm) | Max. Angular Misalignment (°) | Max. Axial Misalignment (mm) | Mass** (g) |
|---|---|---|---|---|---|---|---|---|---|
| MFBS-12 | 6.35 | 0.5 | 1 | 52000 | 100 | 0.1 | 1.5 | -1.2～+0.4 | 9.1 |
| MFBS-16 | 8 | 1 | 2 | 39000 | 150 | 0.1 | 1.5 | -1.2～+0.4 | 20 |
| MFBS-20 | 10 | 1.5 | 3 | 31000 | 220 | 0.15 | 2 | -1.8～+0.6 | 37 |
| MFBS-25 | 12 | 2 | 4 | 25000 | 330 | 0.15 | 2 | -1.8～+0.6 | 73 |
| MFBS-32 | 16 | 3 | 6 | 19000 | 490 | 0.2 | 2 | -2.5～+0.8 | 130 |
*Adjustment of rated and max. torque specifications for load fluctuations is not required.
For more detailed information, please refer to Selection Guidelines [PDF 171KB].
**Based on the max. shaft bores.
| Part Number | Stock Bores D1-D2 | |||||||
|---|---|---|---|---|---|---|---|---|
| 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | |
| MFBS-12 | ● | ● | ● | ● | – | – | – | – |
| MFBS-16 | – | ● | ● | ● | ● | – | – | – |
| MFBS-20 | – | – | ● | ● | ● | ● | – | – |
| MFBS-25 | – | – | – | ● | ● | ● | ● | – |
| MFBS-32 | – | – | – | ● | ● | ● | ● | ● |
●All products come with set screws (MFB/MFBS)..
●Hubs with shaft bore diameters of φ4 or less have one set screw.
●Tolerance of shaft bore on set screw type is H8.
●Recommended tolerance for shaft diameters is h6 and h7.
●Bore and keyway modifications are available on request. Please take advantage of our bore modification services.
For more information please refer to Custom Bore Modifications [PDF 495KB].
Material/Finish
| MFB/MFB-C | MFBS/MFBS-C | |
|---|---|---|
| Hub | A2017 Alumite Treatment | SUS303 |
| Bellows | C5191 | SUS316L |
| Hex Socket Set Screw | SCM435 Ferrosoferric Oxide Film | SUSXM7 |
| Hex Socket Head Cap Screw | SCM435 Ferrosoferric Oxide Film | SUSXM7 |
Structure
Set Screw ｔype
MFB Aluminum alloy hub MFB,MFBS,MFB-C,MFBS-C
MFBS Made of all stainless steel MFB,MFBS,MFB-C,MFBS-C
Clamping type
MFB-C Aluminum alloy hub MFB,MFBS,MFB-C,MFBS-C
MFBS-C Made of all stainless steel MFB,MFBS,MFB-C,MFBS-C
Characteristics
- Applicable motors
MFB MFBS Servomotor – – Stepping motor ○ ○ General-purpose motor – – ◎: Excellent ○: Very good
- Property
MFB MFBS Zero Backlash ◎ ◎ Allowable Misalignment ○ ○ Corrosion Resistance（All S.S.） – ◎ ◎: Excellent ○: Very good
- This is a bellows-type flexible coupling.
- The bellows allows the eccentricity, and angular misalignment, and end-play.
- Even if there is misalignment, the constant revolution is performed.
- There are two types of bellows: phosphor bronze type and stainless steel type.
Application
Encoder
Selection
The area bounded by the shaft diameter and rated torque indicates is the selection size.
Selection example
In case of selected parameters of shaft diameter of φ10 and load torque of 2 N・m, the selected size for MFBMFB-32.
