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Ferrotec direct replacements
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Magnetic fluid (ferrofluid) fills a small annular gap between a rotating shaft and a stationary magnetic pole piece. The gap is part of a high-energy magnetic circuit which includes the shaft and pole piece. The very large magnetic flux in the gap exerts a force on the fluid, holding it in place against pressure difference from atmosphere to vacuum, yielding a dynamic rotary seal in which there is no solid friction. Therefore, very long operating lifetimes are achieved.

Because the magnetic fluid has very low vapor pressure, it remains permanently in place for the entire lifetime of the seal, and does not contaminate the system. Some applications have special requirements (high temperature, highly reactive gases) which can be satisfied by selection of the optimum fluid from our family of fluid materials.

 
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Inch-based models; Ferrotec direct replacements

The unique Magnaseal design eliminates the grooved shafts found in competing products. These stronger and stiffer shafts provide higher torque ratings per shaft size and reduced gas bursting during rotation, especially if side loading is applied. Many models employ flanges and housings machined as a single piece for optimum vacuum integrity and alignment. Vacuum levels to 10-8 torr range are standard. Lower levels are optional. Operation temperatures above 85°C require water-cooled version.

These products are manufactured in the USA under Rigaku's US Patent 4,605,233. The balanced multi-magnet design covered by this patent means external magnetic fields are reduced.

Product cross reference—Ferrotec to Rigaku1

Solid shaft models

Ferrotec Rigaku
Part number
(50◊)
Model number Part number Model number
103971 MB-188-L-N-090 10C-8917-A FD-BS-0188
103915 MB-250-B-N-101 10C-8918-A FD-CFM-0250
103978 MB-250-K-N-089 10C-8917-B FD-BS-0250
103237 SB-250-A-N-086 10C-8908-A FD-LSR-0250-A
103982 SB-250-E-N-121 (Sloan) 10C-8920-B FD-LSR-0250-Sloan
103236 SB-250-G-N-085 10C-8909-B FD-LSR-0250-D
103979 SB-252-C-N-011 10C-8909-A FD-LSR-0250-C
104445 SB-253-A-N-010 10C-8908-B FD-LSR-0250-B
103532 SB-253-B-N-026 10C-8910-A FD-CF-0250
103501 SB-253-B-W-148 10C-8910-B FD-CF-0250-W
103990 SB-375-A-N-087 10C-8911-A FD-LSR-0375-A
108664 SB-375-A-N-176 10C-8912-A FD-LSR-0375-C
103154 SB-375-B-N-147 10C-8912-B FD-CF-0375
103912 SB-375-B-W-151 10C-8913-A FD-CF-0375-W
103991 SB-375-C-N-103 10C-8911B FD-LSR-0375-B
103994 SB-375-E-N-150 (MRC) 10C-8921-A FD-F1-0375-MRC
106063 SB-10MM-KF40 (Balzers) 10C-8922-A FD-KF-0394-Balzers
103191 SB-500-A-N-069 10C-8913-B FD-BS-0500
103204 SB-500-A-W-072 10C-8914-A FD-BS-0500-W
103909 SB-500-B-N-012 10C-8914-B FD-CF-0500
103244 SB-500-F-N-049 10C-8915-A FD-F1-0500
103182 SB-500-F-W-057 10C-8915-B FD-F1-0500-W
103193 SB-750-A-N-077 10C-8916-A FD-BS-0750
103206 SB-750-A-W-080 10C-8916-B FD-BS-0750-W

Heavy-duty cantilevered types, solid shaft

Ferrotec Rigaku
Part number
(50◊)
Model number Part number Model number
103904 HDSB-750-F-W-134 10C-8919-A FD-F1-0750-W
104259 HDSB-1000-F-W-135 10C-8919-B FD-F1-1000-W
103328 HDSB-1687-F-W-136 10C-8920-A FD-F1-1687-W

Hollow haft models

Ferrotec Rigaku
Part number
(50◊)
Model number Part number Model number
103318 SC-500-C 10C-8925-A FD-HS-0500-C
103358 SC-500-FC 10C-8926-A FD-F1-HS-0500-C
105395 SC-500-FWC 10C-8927-A FD-F1-HS-0500-W-C
103319 SC-1000-C 10C-8925-B FD-HS-1000-C
103359 SC-1000-FC 10C-8926-B FD-F1-HS-1000-C
105396 SC-1000-FWC 10C-8927-B FD-F1-HS-1000-W-C
103320 SC-1500-C 10C-8925-C FD-HS-1500-C
103360 SC-1500-FC 10C-8926-C FD-F1-HS-1500-C
103354 SC-1500-FWC 10C-8927-C FD-F1-HS-1500-W-C
103321 SC-2000-C 10C-8925-D FD-HS-2000-C
103361 SC-2000-FC 10C-8926-D FD-F1-HS-2000-C
103921 SC-2000-FWC 10C-8927-D FD-F1-HS-2000-W-C
103322 SC-3000-C 10C-8925-E FD-HS-3000
103362 SC-3000-FC 10C-8926-E FD-F1-HS-3000-C
105397 SC-3000-FWC 10C-8927-E FD-F1-HS-3000-W-C

Heavy-duty cantilevered types, hollow shaft

Ferrotec Rigaku
Part number
(50◊)
Model number Part number Model number
107426 HS-750-F-W-S 10C-8928-D3 FD-F1-HS-A-0750E
107423 HS-1000-F-W 10C-8928-A FD-F1-HS-A-1000
107427 HS-1250-F-W-S 10C-8928-E3 FD-F1-HS-A-1250-E
107424 HS-1500-F-W 10C-8928-B FD-F1-HS-A-1500
107428 HS-1500-F-W-S 10C-8928-F3 FD-F1-HS-A-1500-E
107425 HS-1750-F-W 10C-8928-C FD-F1-HS-A-1750

1 For products not listed in these tables, please inquire
2 ◊ may be A, B, C, or D
3 Includes Delrin shaft sleeve for electrical isolation

  • Repair and reconditioning of all units is available at reasonable cost
  • Inquire about application-specific products designed for optimum performance to customer specs
  • Widest range of products built on millimeter standard dimensions
  • See our RMS series products