SKF Nitrile Rubber (NBR) Radial Shaft Seal, 28 mm ID, 40 mm OD, 7 mm

Subtotal (1 pack of 10 units)*

$36.16

(exc. GST)

$39.78

(inc. GST)

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10 +$3.616$36.16

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RS Stock No.:
266-9107
Mfr. Part No.:
28X40X7 HMS5 RG
Brand:
SKF
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Brand

SKF

Inside Diameter

28mm

Product Type

Radial Shaft Seal

Outside Diameter

40mm

Seal Type

Rotary Shaft Seal

Thickness

7mm

Seal Material

Nitrile Rubber (NBR)

COO (Country of Origin):
CN

SKF Radial Shaft Seal, 28mm Inside Diameter, 40mm Outside Diameter - 28X40X7 HMS5 RG


This radial shaft seal provides a rotary sealing solution for shafts, designed to retain fluids and exclude contaminants in rotating assemblies. It is manufactured from nitrile rubber and suited for applications requiring a resilient lip seal with standard sealing geometry.

Features and Benefits:


• Nitrile rubber composition offering chemical resistance and elasticity
• Rotary lip design maintaining dynamic sealing under rotation
• 7mm cross-section supporting stable axial contact pressure
• 28mm internal bore ensuring firm shaft fit for concentricity
• 40mm external diameter enabling secure housing seating

Applications


• Suitable for small gearbox shaft sealing tasks
• Ideal for sealing pump rotary shafts in light machinery
• Used with motor shafts requiring oil retention
• Can be used for bearing housing contamination exclusion
• Appropriate for general industrial maintenance replacements

What material properties affect temperature and fluid compatibility?


The nitrile rubber compound provides balanced resistance to common oils and moderate operating temperatures while retaining elasticity.

How should one confirm correct radial fit during installation?


Measure shaft and housing diameters precisely and ensure interference tolerances match the seal’s internal and external dimensions.

What inspection criteria indicate seal replacement is needed?


Look for hardened or cracked material, deformed sealing lip, or loss of elasticity as signs that replacement is required.

How does the seal maintain sealing under rotation?


The rotary lip geometry generates a pressure-assisted contact with the shaft, preserving fluid retention during shaft movement.

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