Rigaku Americas -- Products -- Vacuum products -- Inch-based models -- Hollow shaft

Feedthroughs

Inch-based models

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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FD-HS style

FD-F1-HS style

FD (inch) series: hollow shaft rotary feedthroughs

Magnetic fluid sealing for high vacuum and other critical process applications

Ferrofluidics direct replacements

FD-HS style: Bore mount, no flange O-rings included
FD-F1-HS style: Flange mounting O-rings included

FD-HS style:

For use with shaft sizes indicated

Nominal	0.5	1.0	1.5	2.0	3.0
Recommended	0.501/0.498	1.001/0.998	1.501/1.498	2.001/1.998	3.001/2.998
Product No. Model	10C-8925-A FD-HS-0500-C	10C-8925-B FD-HS-1000-C	10C-8925-C FD-LHS-1500-C	10C-8925-D FD-HS-2000-C	10C-8925-E FD-HS-3000-C
Max RPM	6000	4500	3000	2500	1800
A (inch) B (inch) C (inch) D (inch) E (inch)	0.502/0.503 1.998/1.997 2.750 3.209 0.03	1.002/1.003 2.623/2.622 2.750 3.339 0.03	1.502/1.503 3.248/3.247 3.000 3.765 0.03	2.002/2.003 3.748/3.747 3.250 3.966 0.03	3.002/3.003 5.247/5.248 3.625 4.464 0.03
F (O-ring) G (O-ring)	2-032 2-014	2-037 2-022	2-041 2-029	2-153 2-033	2-159 2-151
FFC part no. FFC nodel no.	50A-103318 SC-500-C	50A-103319 SC-1000-C	50A-103320 SC-1500-C	50A-103321 SC-2000-C	50A-103322 SC-3000-C

FD-F1-HS style:

Flange mounting; O-rings included

Nominal ID	0.5	1.0	1.5	2.0	3.0
Recommended	0.501/0.498	1.001/0.998	1.501/1.498	2.001/1.998	3.001/2.998
Product No. Model	10C-8926-A FD-F1-HS-0500-C	10C-8926-B FD-F1-HS-1000-C	10C-8926-C FD-F1-HS-1500-C	10C-8926-D FD-F1-HS-2000-C	10C-8926-E FD-F1-HS-3000-C
Max RPM	6000	4500	3000	2500	1800
A (inch) B (inch) (hole pattern)	0.502/0.503 6.00 (4) x 0.75 dia on 4.750 B.C.	1.002/1.003 7.00 (4) x 0.75 dia on 5.500 B.C.	1.502/1.503 7.00 (4) x 0.75 dia on 5.500 B.C.	2.002/2.003 7.00 (4) x 0.75 dia on 5.500 B.C.	3.002/3.003 10.000 (8) x 0.87 dia on 8.500 B.C.
C (inch) D (inch) E (inch) F (inch) G (inch)	2.75 3.215 0.03 0.38 2.75	2.75 3.339 0.03 0.38 3.00	3.00 3.65 0.03 0.38 3.75	3.25 3.966 0.03 0.38 4.18	3.87 4.717 0.03 0.62 5.87
H (O-ring) J (O-ring)	2-238 2-014	2-244 2-022	2-244 2-029	2-244 2-033	2-262 2-151
FFC Part No. FFC model no.	50A-103358 SC-500-FC	50A-103359 SC-1000-FC	50A-103360 SC-1500-FC	50A-103361 SC-2000-FC	50A-103362 SC-3000-FC

To select a feedthrough for a new application, locate the table for the appropriate shaft mounting style (through-hole, flanged, or bore mount). Dimensional and performance information is tabulated and keyed to an outline drawing.

To identify the Magnaseal direct replacement for a Ferrofluidics Corp. product, locate the FFC Part Number/Model Number at the bottom of each column of tabulated data. For FFC products not listed, or for application engineering assistance or information beyond the scope of the tabulated data, please contact Rigaku Vacuum Products.

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