Magnetic feedthrough is the ideal way to transfer rotational motion from atmosphere to vacuum or overpressure environment. Benefits are friction-less motion, high torque transmission, high speed (>10,000 rpm) capability, low drag torque, smooth motion and no particle generation withstand process operation without degrading.
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Our Product range includes standard and special feedthroughs. We also supply retrofits of conventional feedthroughs of other manufacturers.
We specialize in customized design to optimize performance at competitive price
| Standard Specification: | Specification for CF flange |
| Leak rate: 1 x 10-9 std. cc/sec, He | Leak rate: 1×10-11 std cc/sec, He |
| Vacuum range: 8 x 10-7 Torr | Vacuum range: 5×10-10 Torr |
| Max. operation pressure: 28 psi | |
| Bearing lubrication: Fomblin / Krytox |
| Standard ferrofluid | Reactive gas ferrofluid |
| Base oil: Hydrocarbon | Base oil: Perfluorinated Polyether |
| Max. operation temperature: 0-80 °C | Max. operation temperature: 0-90 °C |
Standard Feedthrough
Part Number system
| S | F | N | Shaft size | Cooling | Bearing | Mounting |
| S= solid shaft | F= flange | N= non-active | 025= 0.25″ | W= water cooling | N= ordinary | C133=CF1.33 |
| H= hollow shaft | B= base plate | A= active | 100= 1.00″ | N= no cooling | H= overload | C275=CF2.75 |
| T= thread | C= cantilever | O6=6″ flange w/o-ring | ||||
| C= cartridge | O= special | O7=7″ flange w/o-ring | ||||
| 516= 5/16-24 thread | ||||||
| 716= 7/16-20 thread | ||||||
| 100= 1″ mtg plate |
Solid Shaft – CF Flange
| VPC P/N | a (inch) | b (inch) | c (inch) | d (inch) | e (inch) | Torque [lb.in] |
| SFN025NN-C133 | 0.250 | 0.750 | 3.250 | 1.750 | 0.750 | 8.4 |
| SFN025NN-C275 | 0.250 | 1.500 | 4.060 | 2.560 | 0.750 | 8.4 |
| SFN025WN-C275 | 0.250 | 1.500 | 4.060 | 2.560 | 0.750 | 8.4 |
| SFN038NN-C275 | 0.375 | 1.500 | 4.060 | 2.560 | 0.750 | 54 |
| SFN038WN-C275 | 0.375 | 1.500 | 4.560 | 3.060 | 0.750 | 54 |
| SFN050NN-C275 | 0.500 | 2.375 | 8.656 | 4.906 | 2.500 | 107 |
Solid Shaft – O-Ring
| VPC P/N | a (inch) | b (inch) | c (inch) | d (inch) | e (inch) | B.C. | O-R face seal |
Torque [lb.in] |
| SFN050NN-O6 | 0.50 | 2.87 | 6.03 | 3.56 | 1.22 | 4.75 x 4 | V234 | 107 |
| SFN050WN-O6 | 0.50 | 2.87 | 6.03 | 3.56 | 1.22 | 4.75 x 4 | V234 | 107 |
| SFN050WN-O7 | 0.50 | 5.00 | 16.32 | 6.00 | 4.32 | 6.00 x 6 | V351 | 107 |
| SFN075WN-05 | 0.75 | 3.00 | 9.39 | 4.88 | 1.84 | 6.00 x 6 | V337 | 205 |
| SFN075NN-06 | 0.75 | 2.87 | 6.03 | 3.56 | 1.25 | 4.75 x 4 | V234 | 205 |
| SFN100WN-06 | 1.00 | 4.00 | 12.625 | 5.38 | 3.00 | 5.00 x 6 | V340 | 709 |
Solid Shaft – Thread Mount
| VPC P/N | a (inch) | b (inch) | c (inch) | d (inch) | e (inch) | B.C. | O-R face seal |
Torque [lb.in] |
| STN019NN-516 | 0.187 | 0.63 | 2.562 | 1.58 | 0.482 | 0.28 | V012 | 5 |
| STN025NN-716 | 0.25 | 0.75 | 3.437 | 1.937 | 0.75 | 0.375 | V015 | 6 |
| STN050NN-114 | 0.5 | 2.87 | 8.812 | 5.072 | 1.25 | 1.51 | V128 | 205 |
| STN050WN-114 | 0.5 | 2.87 | 8.812 | 5.072 | 1.25 | 1.51 | V128 | 205 |
| STN075NN-114 | 0.75 | 2.87 | 8.812 | 5.072 | 1.25 | 1.51 | V128 | 709 |
| STN075WN-114 | 0.75 | 2.87 | 8.812 | 5.072 | 1.25 | 1.51 | V128 | 709 |
Solid Shaft – Baseplate Mount
| VPC P/N | a (inch) | b (inch) | c (inch) | d (inch) | e (inch) | B.C. | O-R face seal |
Torque [lb.in] |
| SBN025NN-100 | 0.25 | 1.625 | 3.44 | 1.93 | 0.75 | 1.68 | V026 | 8 |
| SBN025NN-100e (inch) | 0.25 | 1.618 | 3.12 | 1.62 | 0.75 | 1.37 | V026 | 8 |
| SBN025NN-150 | 0.25 | 2.12 | 3.97 | 2.47 | 0.75 | 2.22 | V132 | 8 |
| SBN025NN-075 | 0.25 | 1.625 | 3.44 | 1.93 | 0.75 | 1.68 | V026 | 8 |
| SBN038NN-100 | 0.375 | 1.62 | 3.39 | 1.65 | 0.865 | 1.30 | V026 | 54 |
| SBN038NN-150 | 0.375 | 2.12 | 3.97 | 2.47 | 0.75 | 2.22 | V132 | 54 |
Hollow Shaft – Cartridge Mount
| VPC P/N | a (inch) | b (inch) | c (inch) | d (inch) | e (inch) | f (inch) | O-R OUTER |
O-R INNER |
Speed (RPM) |
| HCN050NN | 0.5025 | 1.9975 | 3.215 | 2.75 | 0.375 | 1.25 | V032 | V014 | 3100 |
| HCN100NN | 1.0025 | 2.6225 | 3.339 | 2.75 | 0.50 | 2.00 | V037 | V022 | 1500 |
| HCN150NN | 1.5025 | 3.2475 | 3.714 | 3.00 | 0.625 | 3.00 | V041 | V029 | 950 |
| HCN200NN | 2.0025 | 3.7475 | 3.966 | 3.25 | 0.625 | 3.50 | V153 | V033 | 760 |
| HCN300NN | 3.0025 | 5.2475 | 4.464 | 3.625 | 0.75 | 4.50 | V159 | V151 | 500 |
Hollow Shaft – O-Ring Flanged
| VPC P/N | a (inch) | b (inch) | c (inch) | d (inch) | e (inch) | f (inch) | O-R OUTER |
O-R INNER |
Speed (RPM) |
| HFN050NN-O6 | 0.5025 | 2.75 | 3.215 | 2.75 | 0.38 | 1.25 | V238 | V014 | 3100 |
| HFN050WN-O6 | 0.5025 | 2.75 | 3.215 | 2.75 | 0.38 | 1.25 | V238 | V014 | 6300 |
| HFN100NN-O7 | 1.0025 | 3.00 | 3.34 | 2.75 | 0.50 | 2.00 | V244 | V022 | 1500 |
| HFN100WN-O7 | 1.0025 | 3.00 | 3.34 | 2.75 | 0.50 | 2.00 | V244 | V022 | 2730 |
| HFN150NN-O7 | 1.5025 | 3.75 | 3.714 | 3.00 | 0.625 | 3.00 | V244 | V029 | 955 |
| HFN150WN-O7 | 1.5025 | 3.75 | 3.714 | 3.00 | 0.625 | 3.00 | V244 | V029 | 1600 |
| HFN200NN-O7 | 2.0025 | 4.18 | 3.966 | 3.25 | 0.625 | 3.50 | V244 | V033 | 764 |
| HFN200WN-O7 | 2.0025 | 4.18 | 3.966 | 3.25 | 0.625 | 3.50 | V244 | V033 | 1100 |
| HFN300NN-O10 | 3.0025 | 5.87 | 4.717 | 3.875 | 0.75 | 4.50 | V262 | V151 | 500 |
| HFN300WN-O10 | 3.0025 | 5.87 | 4.717 | 3.875 | 0.75 | 4.50 | V262 | V151 | 610 |
Part Number Cross Reference
Solid Shaft – CF Flange
| VPC P/N | LESKER P/N | FERROTEC P/N | Description |
| SFN025NN-C133 | KLFDCF025133 | FE103915 | 1/4″ shaft, CF1.33 flange |
| SFN025NN-C275 | KLFDCF025275 | FE103532 | 1/4″ shaft, CF2.75 flange |
| SFN025WN-C275 | KLFDCF025275W | FE103501 | 1/4″ shaft, CF2.75 flange, water cool |
| SFN038NN-C275 | KLFDCF037276 | FE103154 | 3/8″ shaft, CF2.75 flange |
| SFN038WN-C275 | KLFDCF037275W | FE103912 | 3/8″ shaft, CF2.75 flange, water cool |
| SFN050NN-C275 | KLFDCF050276 | FE103909 | 1/2″ shaft, CF2.75 flange |
Solid Shaft – O-Ring
| VPC P/N | LESKER P/N | FERROTEC P/N | Description |
| SFN050NN-O6 | KLFDOF05060 | FE103244 | 1/2″ shaft, 6″ flange w/o-ring |
| SFN050WN-O6 | KLFDOF05060W | FE103182 | 1/2″ shaft, 6″ flange w/o-ring, water cool |
| SFN050WN-O7 | KLFDOF05070W | FE103329 | 1/2″ shaft, 7″ flange w/o-ring, water cool |
| SFN075WN-O5 | KLFDOF07550W | FE103904 | 3/4″ shaft, 5″ flange w/o-ring, water cool |
| SFN075NN-O6 | KLFDOF07560 | FE103246 | 3/4″ shaft, 6″ flange w/o-ring |
| SFN100WN-O6 | KLFDOF10060W | FE103259 | 1″ shaft, 6″ flange w/o-ring, water cool |
Solid Shaft – Thread Mount
| VPC P/N | LESKER P/N | FERROTECH P/N | Description |
| STN019NN-516 | KLFDTM018516 | FE103971 | 3/16″ shaft, 5/16-24 |
| STN025NN-716 | KLFDTM025716 | FE103978 | 1/4″ shaft, 7/16-20 |
| STN0505NN-114 | KLFDTM050114 | FE103191 | 1/2″ shaft, 1″-14 |
| STN0505WN-114 | KLFDTM050114W | FE103204 | 1/2″ shaft, 1″-14, water cool |
| STN075NN-114 | KLFDTM075114 | FE103193 | 3/4″ shaft, 1″-14 |
| STN075WN-114 | KLFDTM075114W | FE103206 | 3/4″ shaft, 1″-14, water cool |
Solid Shaft – Baseplate Mount
| VPC P/N | LESKER P/N | FERROTECH P/N | Description |
| SBN025NN-10 | KLFDBP02510 | FE103237 | 1/4″ shaft, 1.0″ mtg plate |
| SBN025NN-10E | KLFDBP02510E | FE103519 | 1/4″ shaft, 1.0″ mtg plate |
| SBN025NN-15 | KLFDBP02515 | FE103979 | 1/4″ shaft, 1.5″ mtg plate |
| SBN025NN-075 | KLFDBP02575 | FE103236 | 1/4″ shaft, 0.75″ mtg plate |
| SBN038NN-10 | KLFDBP03710 | FE103664 | 3/8″ shaft, 1.0″ mtg plate |
| SBN038NN-15 | KLFDBP03715 | FE103991 | 3/8″ shaft, 1.5″ mtg plate |
Hollow Shaft – Cartridge Mount
| VPC P/N | LESKER P/N | FERROTECH P/N | Description |
| HCN050NN | KLFDHC050 | FE132405 | 1/2″ hollow cartridge |
| HCN100NN | KLFDHC100 | FE103319 | 1″ hollow cartridge |
| HCN150NN | KLFDHC150 | FE103320 | 1.5″ hollow cartridge |
| HCN200NN | KLFDHC200 | FE103321 | 2″ hollow cartridge |
| HCN300NN | KLFDHC300 | FE103322 | 3″ hollow cartridge |
Hollow Shaft – O-Ring Flanged
| VPC P/N | LESKER P/N | FERROTECH P/N | Description |
| HFN050NN-O6 | KLFDHOF05060 | FE103358 | 1/2″ hollow shaft, 6″ flange |
| HFN050WN-O6 | KLFDHOF05060W | FE105395 | 1/2″ hollow shaft, 6″ flange, water cool |
| HFN100NN-O7 | KLFDHOF10070 | FE103359 | 1″ hollow shaft, 7″ flange |
| HFN100WN-O7 | KLFDHOF10070W | FE105396 | 1″ hollow shaft, 7″ flange, water cool |
| HFN150NN-O7 | KLFDHOF15070 | FE103360 | 1.5″ hollow shaft, 7″ flange |
| HFN150WN-O7 | KLFDHOF15070W | FE103354 | 1.5″ hollow shaft, 7″ flange, water cool |
| HFN200NN-O7 | KLFDHOF20070 | FE103361 | 2″ hollow shaft, 7″ flange |
| HFN200WN-O7 | KLFDHOF20070W | FE103921 | 2″ hollow shaft, 7″ flange, water cool |
| HFN300NN-O10 | KLFDHOF30010 | FE133218 | 3″ hollow shaft, 10″ flange |
| HFN300WN-O10 | KLFDHOF30010W | FE133760 | 3″ hollow shaft, 10″ flange, water cool |