Industrial seal self study guide - SKF.com

For best seal performances, use:
• Arbor or hydraulic press
• Wooden block
• Soft-faced hammer or mallet
Installation tools in order of preference:
• Tools tailor-made for seal installation
• Standard driving plug
• Old bearing cup
• Wooden block
Sealing damage may result when using:
• Steel hammer
• Drift or punch
• Chisel or screwdriver
• Direct hammer blows on the face of the seal
• Starting seal into the bore at an angle (cocked)
Installation Checklist
1. Check the bore. Remove any burrs from the leading edge.
Be sure there is a rounded corner or chamfer (fig. 8d).
2. Check the shaft. Remove burrs, surface nicks, grooves and spiral
machine marks (machine lead).
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3. Check the shaft end. Remove burrs or sharp edges. If the shaft
enters the seal against the sealing lip, its end must be chamfered
or a special installation tool must be used.
4. Check splines and keyways. Sharp edges should be covered
with a lubricated assembly sleeve, shim stock or tape to protect
the seal lip.
5. Check the dimensions. Make sure that shaft and bore diameters
match those specified for the seal selected.
6. Check for part interference. Watch out for other machine parts that
might rub against the seal and cause friction and damaging heat.
Remember to check shaft and bore
surfaces and pre-lube the seal
before installation (fig. 8d).
7. Check the seal. Damage may have occurred before installation.
A sealing lip that is turned back, cut or otherwise damaged should
be replaced.
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