SEAL TM4

The TM4 profile is a special seal for motorcycles and bicycles shock absorbers, composed of an external metal core with an internal rubber coating, especially suitable for protecting the casing from erosive fluid.

CHARACTERISTICS

High radial rigidity, particularly suitable for large diameters.
Excellent stability after installation, effectively preventing any rebound effect.
Sealing for low- and high-viscosity fluids
Modern primary sealing lip with reduced radial forces.
Protection against unwanted airborne contaminants
Interior coating that protects the housing from erosive fluids.

See our Installation guide for oil seals to perform a correct installation of the seal.

ø	ºC	bar	m/s
15-100 mm	-30ºC / 100ºC	≤ 6.5 bar	≤ 1,5 m/s

MATERIALS

Elastomer

NBR 80-90 Shore A

HNBR 80-90 Shore A

XNBR 80-90 Shore A

Metal casing

AISI 1060-90 - AISI 304 - AISI 316

Spring

AISI 1060-90 - AISI 302 - AISI 304 - AISI 316

TOLERANCES FOR THE OUTSIDE DIAMETER OF THE OIL SEAL

Housing diameter	Metal cage	Elastomeric coating	Housing with grooves
≤50.0	+0.10 / +0.20	+0.15 / +0.30	+0.20 / +0.40
<50.0 ≤80.0	+0.13 / +0.23	+0.20 / +0.35	+0.25 / +0.45
<80.0 ≤120.0	+0.15 / +0.25	+0.20 / +0.35	+0.25 / +0.45
<120.0 ≤180.0	+0.18 / +0.28	+0.25 / +0.45	+0.30 / +0.55
<180.0 ≤300.0	+0.20 / +0.30	+0.25 / +0.45	+0.30 / +0.55
<300.0≤500.0	+0.23 / +0.35	+0.30 / +0.55	+0.35 / +0.65
<500.0 ≤630.0	+0.23 / +0.35	+0.35 / +0.65	+0.40 / +0.75

TOLERANCE FOR THE INNER DIAMETER OF THE SEAL

The inner diameter of the sealing lip is always smaller than the shaft diameter. Depending on the shaft size, the sealing lip diameter is generally between 0.8 and 3.5 mm smaller than the shaft diameter.

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