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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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Product cross reference Ferrofluidics/Ferrotec to Rigaku

Ferrofluidics/Ferrotec Corp.

Rigaku

Part number1

Model

Product number

Model

Solid shaft models

103971

MB-188-L-N-090

10C-8917-A

FD-BS-0188

103915

MB-250-B-N-089

10C-8918-A

FD-CFM-0250

103978

MB-250-K-N-101

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-8911-B

FD-CF-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

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 Shaft Models

103318

SC-500-C

10C-8925-A

10C-8925-A

103358

SC-500-FC

10C-8926-A

10C-8926-A

105395

SC-500-FWC

10C-8927-A

10C-8927-A

103319

SC-1000-C

10C-8925-B

10C-8925-B

103359

SC-1000-FC

10C-8926-B

10C-8926-B

105396

SC-1000-FWC

10C-8927-B

10C-8927-B

103320

SC-1500-C

10C-8925-C

10C-8925-C

103360

SC-1500-FC

10C-8926-C

10C-8926-C

103354

SC-1500-FWC

10C-8927-C

10C-8927-C

103321

SC-2000-C

10C-8925-D

10C-8925-D

103361

SC-2000-FC

10C-8926-D

10C-8926-D

103921

SC-2000-FWC

10C-8927-D

10C-8927-D

103322

SC-3000-C

10C-8925-E

10C-8925-E

103362

SC-3000-FC

10C-8926-E

10C-8926-E

105397

SC-3000-FWC

10C-8927-E

10C-8927-E

Heavy-Duty Cantilevered Types, Hollow Shaft

107426

HS-750-F-W-S

10C-8928-D *

FD-F1-HS-A-0750-E

107423

HS-1000-F-W

10C-8928-A

FD-F1-HS-A-1000

107427

HS-1250-F-W-S

10C-8928-E *

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-F *

FD-F1-HS-A-1500-E

107425

HS-1750-F-W

10C-8928-C

FD-F1-HS-A-1750

Notes:

  • 1Part number may precede with 50 - A, B, C, or D

  • * = includes Delrin Shaft Sleeve for electrical isolation

  • For products not listed in these tables, please inquire

A wide range of other products and services are available. If items listed in this catalog are not suitable for your application, please contact Rigaku Vacuum Products.