Standard Series F1B-***-B***
φ 10mm or over
This is the most standard flange mounting type. In this specification, bearings are installed in both sides.
For shaft diameter of 15mm or over, end face flat processing is not covered by this specification.
Choose from the options below to see other series with the same properties:
- Solid shaft (equipped with shaft)
- Shaft diameter: 10, 12, 15, 20, 25, 30
- Bearing arrangement: Standard (Both sides)
- Water cooling: Yes
- Shaft features: Round straight, Flat cut, Key groove

Explanation of the model designation
Product specification
F1B-010-B | F1B-012-B | F1B-015-B | F1B-020-B | F1B-025-B | F1B-030-B | |
---|---|---|---|---|---|---|
Inquiry | Inquiry | Inquiry | Inquiry | Inquiry | Inquiry | Inquiry |
A [mm] | $10g6^{-0.005}_{-0.014}$ | $12g6^{-0.006}_{-0.017}$ | $15g6^{-0.006}_{-0.017}$ | $20g6^{-0.007}_{-0.020}$ | $25g6^{-0.007}_{-0.020}$ | $30g6^{-0.007}_{-0.020}$ |
B [mm] | 112 | 112 | 128 | 144 | 148 | 169 |
C [mm] | 30 | 30 | 40 | 45 | 50 | 60 |
D [mm] | 57 | 57 | 58 | 67 | 61 | 61 |
E [mm] | $64f7^{-0.030}_{-0.060}$ | $64f7^{-0.030}_{-0.060}$ | $74f7^{-0.030}_{-0.060}$ | $84f7^{-0.036}_{-0.071}$ | $89f7^{-0.036}_{-0.071}$ | $89f7^{-0.036}_{-0.071}$ |
F [mm] | 8 | 8 | 8 | 10 | 12 | 12 |
H [mm] | 40 | 40 | 47 | 54 | 59 | 59 |
J | 6-Φ6.5PCD54 | 6-Φ6.5PCD54 | 6-Φ6.5PCD61 | 6-Φ9PCD70 | 6-Φ9PCD75 | 6-Φ9PCD75 |
O (O-ring used) | G35 | G35 | G40 | G45 | G50 | G50 |
Water cooling option | 2-Rc1/8 | 2-Rc1/8 | 2-Rc1/8 | 2-Rc1/8 | 2-Rc1/8 | 2-Rc1/8 |
G [mm] | 19 | 19 | 20 | 22 | 17 | 17 |
Shaft option1 | Key groove (both ends) | Key groove (both ends) | Key groove (both ends) | Key groove (both ends) | Key groove (both ends) | Key groove (both ends) |
S [mm] | 16 | 19 | 26 | 31 | 36 | 46 |
T [mm] | $2.5^{+0.1}_{0}$ | $2.5^{+0.1}_{0}$ | $2.5^{+0.1}_{0}$ | $3^{+0.1}_{0}$ | $4^{+0.1}_{0}$ | $5^{+0.1}_{0}$ |
U [mm] | $4^{+0.040}_{0}$ | $4^{+0.040}_{0}$ | $5^{+0.040}_{0}$ | $6^{+0.040}_{0}$ | $8^{+0.040}_{0}$ | $10^{+0.040}_{0}$ |
Shaft option2 | Flat cut (both ends) | Flat cut (both ends) | ||||
S [mm] | 15 | 18 | ||||
V [mm] | 1 | 1 | ||||
Max. rotation rate [rpm]1,2 (with water cooling) |
3200 | 3200 | 2200 | 1900 | 1300 | 1300 |
Rated rotation rate [rpm]1,3 (with water cooling) |
2600 | 3200 | 2200 | 1900 | 1300 | 1300 |
Allowable axial load [N]4 | 118 | 137 | 141 | 213 | 115 | 140 |
Allowable radial load [N]5 | 118 | 137 | 141 | 213 | 115 | 140 |
Mass [kg] | 0.7 | 0.7 | 1 | 1.5 | 1.9 | 2.2 |
Starting torque [N∙m]1,6 | 0.051 | 0.051 | 0.1 | 0.14 | 0.32 | 0.32 |
Allowable transmission torque [N∙m] | 9 | 13 | 30 | 60 | 140 | 210 |
¹This is the numerical value when a magnetic fluid of standard vacuum specification (A type) is used. The value is different when a magnetic fluid of anti-corrosion specification (F type) or low vapor pressure and anti-corrosion specification (U type) is used.
²The allowable rotation rate when no load is applied to the shaft.
³The allowable rotation rate when the allowable radial load is applied.
⁴The maximum axial load that can be applied to the center of magnetic fluid seal shaft.
If the load combined with the radial load is applied, or if the load point is off the center of the shaft, please contact us from the Inquiry Form for the magnetic fluid and describe the load conditions in the form.
⁵The maximum radial load that can be applied to the shaft end of magnetic fluid seal.
If the load combined with the axial load is applied, or if the load point is far from the shaft end, please contact us from the Inquiry Form for the magnetic fluid and describe the load conditions in the form.
⁶Starting torque is the maximum load torque upon starting of rotation. This is a reference value and not a guaranteed value. Recommended load torque for selecting a motor is about three times as high as the value described above.
Common specifications for standard products
Vacuum resistance | 1.0x10-6 Pa | |
---|---|---|
Leakage rate (He) | 9.9×10-11 Pa・m3/sec or less | |
Operating atmosphere¹ | In vacuum / in inert gas / in corrosive gas | |
Materials used | Housing | SUS 304 |
Shaft | SUS 630 | |
Pole piece | SUS 630 | |
Bearing | SUJ2 | |
O-ring | FKM | |
Bearing lubricant | Vacuum side: fluorine vacuum grease Atmosphere side: general-purpose grease with rust inhibitor |
|
Standard accessories² | O-ring Washer and nut (LSB Series) |
¹For application with corrosive gases, please specify a magnetic fluid of anti-corrosion specification or low vapor pressure and anti-corrosion specification. Also, some gas types and operating conditions require different support. Please contact our sales personnel to inform us of your operating environment.
²The size of O-ring supplied is described on the page for details of each model. Also, the LSB Series are supplied with mounting washer and nut.

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