Oil seal OS-ST18

OS-ST18

Description

Cassette seals, also available in other types
These seals are highly robust and rigid sealing systems
Often used in heavy dutp applications and dirty environments

Bijzondere eigenschappen

Cassette seals are fully encapsulated and on the inside they form a grease-filled labyrinth with several sealing and dirt lips (radial and axial)
The main sealing lip is spring-energised, In this way the penetration of dirt, mud, water and dust is effectively prevented
The grease filling reduces wear, increases service life and thereby extends maintenance intervals for heavy-duty applications
The cassette seals also contain a fully pre-treated sealing contact surface
This means that the shaft does not have to be specially hardened and grounded
Additional dirt seals are not required either

Applications e.g.:

agricultural forestry
construction machinery
material handling equipment

Materials

Standard material

Elastomer	NBR 70 black
Spring	Spring steel according to DIN EN 10270-1
Metal case	Carbon steel according to DIN EN 10139

Speciale materialen

Elastomer	FKM
	Silicon
	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
Druk	Drukloos, max. 0,05 MPa
Shaft speed	max. 5 m/s, acc. to chart in „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.