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New products are available now. These products are compatible with Ferrotec’s seals. Click on the following Cross Reference Sheet.

Standard Series FMB-***-B (φ8mm or less)

Solid shaft (equipped with shaft)Shaft diameter ：4 Shaft diameter ：5 Shaft diameter ：6 Shaft diameter ：8 Bearing arrangement ：Standard (Both sides)Water cooling：No water cooling
Round straight Flat cut

This type is based on the F1B type and has a tap hole processed for a motor mount. Motor connection is easy.
Key groove shaft processing is not covered by this specification.

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Product Specification

	FMB-004-B	FMB-005-B	FMB-006-B	FMB-008-B
Inquiry	Inquiry	Inquiry	Inquiry	Inquiry
A [mm]	4g6^{-0.004 -0.012}	5g6^{-0.004 -0.012}	6g6^{-0.004 -0.012}	8g6^{-0.005 -0.014}
B [mm]	60	64	72	85
C [mm]	18	20	22	24
D [mm]	32	32	37	45
E [mm]	35f7^{-0.025 -0.050}	35f7^{-0.025 -0.050}	39f7^{-0.025 -0.050}	48f7^{-0.025 -0.050}
F [mm]	4	4	6	6
H [mm]	29f7^{-0.020 -0.041}	29f7^{-0.020 -0.041}	33f7^{-0.025 -0.050}	42f7^{-0.025 -0.050}
I [mm]	17	17	20	29
J	4-Φ4.5PCD27	4-Φ4.5PCD27	4-Φ4.5PCD31	6-Φ4.5PCD40
K	4-M4PCD22	4-M4PCD22	4-M4PCD25	4-M4PCD34
L [mm]	4	4	5	6
O (O-ring used)	P14	P14	P18	G25
Shaft option	Flat cut (both ends)	Flat cut (both ends)	Flat cut (both ends)	Flat cut (both ends)
S [mm]	8	10	10	12
V [mm]	0.5	0.5	0.5	1
Max. rotation rate [rpm] (1) (2)	7600	7600	6400	4800
Rated rotation rate [rpm] (1) (3)	4000	4000	4000	4000
Allowable axial load [N] (*4)	12	22	35	72
Allowable radial load [N] (*5)	12	22	35	72
Mass [kg]	0.09	0.1	0.16	0.34
Starting torque [N∙m] (1) (6)	0.009	0.009	0.013	0.022
Allowable transmission torque [N∙m]	0.6	0.7	1.4	3.6

(*1): This is the numerical value when a magnetic fluid of standard vacuum specification (A type) is used. The value is different when a magnetic fluid of anti-corrosion specification (F type) or low vapor pressure and anti-corrosion specification (U type) is used.
(*2): The allowable rotation rate when no load is applied to the shaft.
(*3): The allowable rotation rate when the allowable radial load is applied.
(*4): The maximum axial load that can be applied to the center of magnetic fluid seal shaft.
If the load combined with the radial load is applied, or if the load point is off the center of the shaft, please contact us from the Inquiry Form for the magnetic fluid and describe the load conditions in the form.
(*5): The maximum radial load that can be applied to the shaft end of magnetic fluid seal.
If the load combined with the axial load is applied, or if the load point is far from the shaft end, please contact us from the Inquiry Form for the magnetic fluid and describe the load conditions in the form.
(*6): Starting torque is the maximum load torque upon starting of rotation. This is a reference value and not a guaranteed value. Recommended load torque for selecting a motor is about three times as high as the value described above.

Common Specification for Standard Products

Vacuum resistance	1.0x10^-6Pa
Leakage rate (He)	9.9×10^-11Pa・m³/sec or less
Operating atmosphere (*1)	In vacuum / in inert gas / in corrosive gas
Materials used	Housing	SUS 304
	Shaft	SUS 630
	Pole piece	SUS 630
	Bearing	SUJ2
	O-ring	FKM
	Bearing lubricant	Vacuum side: fluorine vacuum grease Atmosphere side: general-purpose case with rust inhibitor
Standard accessories (*2)	O-ring Washer and nut (LSB Series)

(*1): For application with corrosive gases, please specify a magnetic fluid of anti-corrosion specification or low vapor pressure and anti-corrosion specification.
Also, some gas types and operating conditions require different support. Please contact our sales personnel to inform us of your operating environment.
(*2): The size of O-ring supplied is described on the page for details of each model.
Also, the LSB Series are supplied with mounting washer and nut.

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