Oil seal OS-N21

Oil Seal FKM (Pressure version) Type: OS-N21

Dimensions: 10 x 16 x 6
Part number: 540976
Delivery time: 3-5 days
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Oil Seal FKM (Pressure version) Type: OS-N21

Dimensions: 10 x 19 x 7
Part number: 135138
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Oil Seal NBR (Pressure version) Type: OS-N21

Dimensions: 10 x 19 x 7
Part number: 326860
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Oil Seal FKM (Pressure version) Type: OS-N21

Dimensions: 10 x 20 x 6
Part number: 6525912
In Stock
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Oil Seal NBR (Pressure version) Type: OS-N21

Dimensions: 10 x 20 x 6
Part number: 198609
In Stock
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Oil Seal NBR (Pressure version) Type: OS-N21

Dimensions: 10 x 20.7 x 4
Part number: 6525916
Delivery time: 4 weeks
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OS-N21

Description

Pressure loadable radial shaft seal
Elastomer-coated OD, flat
Short spring-loaded sealing lip
Protective lip against entry of contamination from outside (dust, dirt,...)

Special features

Pressure loadable due to special sealing lip design
Reliable static sealing inside housing
For housings with high thermal expansion, e.g., light metal housing
For split housings
For housings with increased surface roughness
For sealing thin-body and gaseous media
No risk of fretting corrosion
Efficient protection against air side contaminations

Applications e.g.:

Rotating / pressurized applications
Pressurized units such as pumps or hydraulic motors

For housings with increased surface roughness

Materials

Standard material

Elastomer	NBR 80 blue
Spring	Spring steel according to DIN EN 10270-1
Metal case	Carbon steel according to DIN EN 10139

Special materials

Elastomer	FKM
	Silicone
	ACM
	HNBR
	CR
	EPDM
Spring	Stainless steel 1.4301
Metal case	Stainless steel 1.4301

Application parameters

For the standard materials combination

Temperature	-40°C to +100°C
Pressure	acc. to table „Operating parameters for rotary shaft seals“
Shaft speed	acc. to chart „Operating parameters for rotary shaft seals“
Media	Mineral oil based lubricants, synthetic lubricants

When synthetic lubricants are used for which there is no empirical experience, test the compatibility in the laboratory or - better even - in practical trials. The operating temperature should not exceed 80°C.

Design information

Shaft

Tolerance	ISO h11
Hardness	min. 45 HRC
Roughness	Ra = 0,2 - 0,8 μm
Rz	1-5 μm
Rmax	≤ 6,3 μm
Surface finish	free of orientation (lead free)

Housing bore

Tolerance	ISO H8
Roughness	Ra = 1,6 - 6,3 μm
Rz	= 10 - 20 μm
Rmax	≤ 25 μm

Installation

Please read our installation instructions.