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Feedthroughs

Metric RMS 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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RMS-BS series

RMS-LS series

RMS-F1 series

RMS-F2 series

RMS (metric) series: Solid shaft rotary feedthroughs

Magnetic fluid sealing for high vacuum and other critical process applications

Direct Ferrotec replacements

RMS-BS series: Metric solid shaft, nose mount
RMS-LS series: Metric solid shaft, base plate through hole
RMS-F1 and F2 series: Metric solid shaft, flange mount

RMS-BS series: Metric solid shaft, nose mount

Bearing location

Shaft end shape

Model	BS-5		BS-6		BS-10		BS-20
Product No.	10C-9020- G010		10C-9020- G020		10C-9020- G030		10C-9020- G040
Transmission torque	1 N-m		1.6 N-m		8 N-m		60 N-m
Max speed (rpm)	15000		15000		12000		7000
A (mm)	5	-0.010 -0.022	6	-0.010 -0.022	10	-0.013 -0.028	20	-0.020 -0.041
B (mm)	32		42		52		60
C (mm)	6		10		30		34
D (mm)	12.5		15		23		36
E (mm)	15		15		23		36
F (mm)	16		28		38		54
G	M8 × 1		M12 × 1.75		M25 × 1.5		M40 × 1.5
I (mm)	1.5		2		3		3
P (mm)	10		18		30		42
Q (mm)	2.1		2.1		2.7		2.7
X (mm)	23.5		32.5		61.5		83
Y (mm)	22.2		28		35		37
O-ring (fluororubber)	S10		S18		S30		S42
Bearing type	695		636		6200		6004
Nut U / R (mm)	15 / 3		22 / 5		34 / 6		54 / 12
Washer T / S (mm)	16 / 1		28 / 2		38 / 2		54 / 3
Shaft end shape	K		L		M		M
a (mm)	—		10		20		32
b (mm)	—		0.5		1.8		3.5
c (mm)	—		—		3	+0.025 0	6	+0.030 0

RMS-LS series: Metric solid shaft, base plate through hole

Bearing location

Shaft end shape

Model	LS-5		LS-6		LS-10		LS-12
Product No.	10C-0-20- M010		10C-0-20- M020		10C-0-20- M030		10C-0-20- M040
Transmission torque	1 N-m		1.6 N-m		8 N-m		13 N-m
Max speed (rpm)	15000		15000		12000		10000
A (mm)	5	-0.010 -0.022	6	-0.010 -0.022	10	-0.013 -0.028	12	-0.016 -0.034
B (mm)	26		40		44		54
C (mm)	6		8		8		10
D (mm)	15		15		23		30
E (mm)	15		15		23		30
F (mm)	28		42		48		58
G	M18 × 1.5		M28 × 2		M36 × 1.5		M45 × 1.5
H (mm)	4		6		6		6
I (mm)	1		3		3		3
J (mm)	18	0 -0.2	28	0 -0.2	36	0 -0.2	45	0 -0.2
P (mm)	4		6		6		6
Q (mm)	1		3		3		3
O-ring (fluororubber)	S20		S32		S40		S50
Bearing type	695		636		6200		6201
Nut U / R (mm)	28 / 5		42 / 5		46 / 8		58 / 10
Washer T / S (mm)	28 / 2		42 / 2		46 / 3		58 / 2
Shaft end shape	K		L		M		M
a (mm)	—		10		20		20
b (mm)	—		0.5		1.8		2.5
c (mm)	—		—		3	+0.025 0	4	+0.030 0

RMS-F1 and F2 series: Metric solid shaft, flange mount

Shaft end shape

Model	F1 (F2) -5		F1 (F2) -6		F1 (F2) -10		F1 (F2) -12		F1 (F2) -20		F1 (F2) -30		F1 (F2) -40
Product No.	10C-9020- K010 (L010)		10C-9020- J020 (K020)		10C-9020- J030 (K030)		10C-9020- J040 (K040)		10C-9020- J050 (K050)		10C-9020- J060 (K060)		10C-9020- J070 (K070)
Transmission torque	1 N-m		1.6 N-m		8 N-m		13 N-m		60 N-m		210 N-m		500 N-m
Max speed (rpm)	15000		15000		12000		10000		7000		6000		4000
A (mm)	5	-0.010 -0.022	6	-0.010 -0.022	10	-0.013 -0.028	12	-0.016 -0.034	20	-0.020 -0.041	30	-0.020 -0.041	40	-0.025 -0.050
B (mm)	26		40		44		54		52		68		75
C (mm)	6		8		8		10		10		12		15
D (mm)	15		15		23		40		36		50		60
E (mm)	15		15		23		30		36		50		60
F (mm)	36		52		70		80		114		114		140
G (mm)	16	-0.1 -0.2	28	-0.1 -0.2	36	-0.1 -0.2	40	-0.1 -0.2	60	-0.1 -0.2	68	-0.1 -0.2	84	-0.1 -0.2
H	6- φ 4.3 PB28		6- φ 4.5 PD40 (43)		6- φ 6.7 PD58.7		6- φ 7.0 PD65.0		8- φ 8.5 PD92.2		8- φ 8.5 PD92.2		8- φ 11 PD115
P (mm)	18		24 (30)		42		45		70		70		90
Q (mm)	2.1		2.7		2.7		2.7		2.7		2.7		2.7
X (mm)	20		28.5		51.5 (31.5)		52 (42)		51		65.5		76
Y (mm)	22.7		28		35		43		37		54		63
O-ring (fluororubber)	S18		S24 (S30)		S42		S45		S70		S70		S90
Bearing type	695		636		6200		6201		6004		6006		6908
Shaft end shape	K		L		M		M		M		M		M
a (mm)	—		10		20		25		32		35		40
b (mm)	—		0.5		1.8		2.5		3.5		4		5
c (mm)	—		—		3	+0.025 0	4	+0.030 0	6	+0.030 0	8	+0.036 0	12	+0.043 0

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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