New products are available now. These products are compatible with Ferrotec’s seals. Click on the following Cross Reference Sheet.
Standard Series NFT-***-B***
Hollow shaft (requiring shaft insertion)Shaft diameter ：50Shaft diameter ：75Shaft diameter ：10Shaft diameter ：12Shaft diameter ：15Shaft diameter ：20Shaft diameter ：25Shaft diameter ：30Shaft diameter ：40Bearing arrangement ：Standard (Both sides)Water cooling：No water cooling
Without clampWith clamp
Without clampWith clamp
This is a flange-less type, which is directly fit into a chamber wall and sealed with an O-ring.
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Product Specification
| NFT-010-B | NFT-012-B | NFT-015-B | NFT-020-B | NFT-025-B | NFT-030-B | NFT-040-B | NFT-050-B | NFT-075-B | |
|---|---|---|---|---|---|---|---|---|---|
| Inquiry | Inquiry | Inquiry | Inquiry | Inquiry | Inquiry | Inquiry | Inquiry | Inquiry | Inquiry |
| A [mm] | 10H7+0.015 0 |
12H7+0.018 0 |
15H7+0.018 0 |
20H7+0.021 0 |
25H7+0.021 0 |
30H7+0.021 0 |
40H7+0.025 0 |
50H7+0.025 0 |
75H7+0.030 0 |
| B [mm] | 60 | 60 | 69 | 63 | 65 | 71 | 72 | 84 | 94 |
| D [mm] | 58 | 58 | 67 | 61 | 63 | 69 | 70 | 82 | 92 |
| E [mm] | 40g6-0.009 -0.025 |
40g6-0.009 -0.025 |
49g6-0.009 -0.025 |
55g6-0.010 -0.029 |
63g6-0.010 -0.029 |
73g6-0.010 -0.029 |
83g6-0.012 -0.034 |
95g6-0.012 -0.034 |
126g6-0.014 -0.039 |
| O1 (O-ring used) | S36 | S36 | S45 | S50 | S60 | S70 | S80 | S90 | S120 |
| O2 (O-ring used) | S30 | S30 | S38 | S44 | S50 | S60 | G70 | G80 | G110 |
| O3 (O-ring used) | S10 | S12 | S15 | S20 | S25 | S30 | S40 | S50 | S75 |
| P [mm] | 17 | 17 | 20 | 30 | 35 | 40 | 50 | 60 | 90 |
| Q1 [mm] | 6 | 6 | 6 | 7 | 7 | 8 | 9 | 9 | 10 |
| Q2 [mm] | 8 | 8 | 9 | 9 | 10 | 11 | 11 | 11 | 14 |
| Q3 [mm] | 7 | 7 | 7 | 8 | 8 | 9 | 10 | 10 | 11 |
| Q4 [mm] | 9 | 9 | 10 | 10 | 11 | 12 | 12 | 12 | 15 |
| Shaft option | Clamp | Clamp | Clamp | Clamp | Clamp | Clamp | Clamp | Clamp | Clamp |
| W [mm] | 11 | 11 | 11 | 13 | 15 | 15 | 15 | 15 | 19 |
| X [mm] | 35 | 37 | 40 | 45 | 57 | 61 | 73 | 83 | 109 |
| Y (hexagon socket head bolt) | M4×10 | M4×10 | M4×10 | M4×10 | M6×12 | M6×12 | M6×16 | M6×16 | M8×20 |
| Max. rotation rate [rpm] (*1) (*2) | 2200 | 2200 | 1900 | 1300 | 1100 | 1000 | 800 | 600 | 400 |
| Rated rotation rate [rpm] (*1) (*3) | 2200 | 2200 | 1900 | 1300 | 1100 | 1000 | 800 | 600 | 400 |
| Allowable axial load [N] (*4) |
252 | 252 | 390 | 300 | 440 | 550 | 580 | 810 | 800 |
| Allowable radial load [N] (*5) |
252 | 252 | 390 | 300 | 440 | 550 | 580 | 810 | 800 |
| Mass [kg] | 0.5 | 0.5 | 0.8 | 1.0 | 1.3 | 1.9 | 2.3 | 3.3 | 5.8 |
| Starting torque [N∙m] (*1) (*6) |
0.1 | 0.1 | 0.14 | 0.32 | 0.43 | 0.56 | 0.88 | 1.3 | 2.8 |
| Recommended shaft diameter [mm] (*4) |
10f7-0.013 -0.028 |
12f7-0.016 -0.034 |
15f7-0.016 -0.034 |
20f7-0.020 -0.041 |
25f7-0.020 -0.041 |
30f7-0.020 -0.041 |
40f7-0.025 -0.050 |
50f7-0.025 -0.050 |
75f6-0.030 -0.049 |
| Recommended housing diameter [mm] (*4) |
40H7+0.025 0 |
40H7+0.025 0 |
49H7+0.025 0 |
55H7+0.030 0 |
63H7+0.030 0 |
73H7+0.030 0 |
83H7+0.035 0 |
95H7+0.035 0 |
126H7+0.040 0 |
- (*1): This 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.
- (*2): The allowable rotation rate when no load is applied to the shaft.
- (*3): The allowable rotation rate when the allowable radial load is applied.
-
(*4): The 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. -
(*5): The 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. - (*6): Starting 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 Specification for Standard Products
| Vacuum resistance | 1.0x10-6Pa | |
|---|---|---|
| Leakage rate (He) | 9.9×10-11Pa・m3/sec or less | |
| Operating atmosphere (*1) | 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 case with rust inhibitor |
|
| Standard accessories (*2) | O-ring Washer and nut (LSB Series) |
|
-
(*1): For 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. -
(*2): The 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.