What is an interference (shrink) fit?
 Which methods used and precautions must be concerned with when using shrink fit methods?

asked 01 Jun '17, 01:27

June 1, 2017, 1:27 a.m.
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edited 01 Jun '17, 04:51


Answer:

When hub of bearing inner diameter equal to the shaft outer diameter fitting it requires some force to fit. This case of fitting called interference or shrink fit. To put detail on the shaft thermal expansion/shrinking effect could be used. "Inner" part of assembly (usually shaft) could be frozen in freezer or with dry ice. "Outer" (bearing/hub) could be heated in hot oil bath or induction heater. Temperature difference will provide sufficient difference between inner and outer diameter for fitting. Be careful in direct heat - protect heat treating of metal. Use soft punch, brass when forcing hub or bearing onto the shaft. Keep parts clean and free from grit and keep smooth.


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answered 01 Jun '17, 05:03

June 1, 2017, 5:03 a.m.
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