ovality

[rmsr]

Hi,
i am working in kellenberger external cylindrical grinding
m/c, i grind valve parts which is very precise.

i face ovality problem(using expansion mandrels) as the wall thickness is about 5-8mm, does any of u faced this,
please share ur ideas..

 

[ornerynorsk]

Are your mandrels being over-applied or tightened?

 

[rmsr]

dear ornerynorsk,

we apply minimum pressure as well as we tried other type of clamping too, still we r getting ovality of .001 to .002 mm

ragavan

 

[Don039]

Have you tried to use an hydraulic arbor?