Bearing effective interference
Bearing effective interference
(OP)
Hello,
do anyone have an idea about :
how to calculate value of bearing effective interference ?
what is the difference between bearing internal clearance and effective interference ?
Thanks,
do anyone have an idea about :
how to calculate value of bearing effective interference ?
what is the difference between bearing internal clearance and effective interference ?
Thanks,





RE: Bearing effective interference
http://www.nsk.com.br/upload/file/NSK_CAT_E1102m_A...
SKF does here -
http://www.skf.com/us/products/bearings-units-hous...
RE: Bearing effective interference
I've seen NSK cataloge before , im already using their equations however , when i tired to get value of effective interference i got a negative value ,which is not acceptable for my calculations i need a positive value...please correct me if im wrong...effective interference = red. in interference due to used fit -(red. in interference due to acting load + red. due to temperature change + red. due to surface finish ) ?
alos, i do have 2 more questions concerning calculation of red. in interfernce due to temperature change :
1-
2- when calculating value of effective interference between housing and bearing outer ring, shall i use red. in interference equation = (α1-α2).ΔT. De or (α1-α2).ΔT.D?
Where De is mean outer race way diameter , D is outer ring diameter.
Thanks again for your help
RE: Bearing effective interference
What do you reckon is the ΔT of your inner ring/shaft in operation?
What do you reckon is the ΔT of your outer ring/housing in operation?
RE: Bearing effective interference
- type of used fit between shaft and inner ring : interference fit. while, that between housing and bearing outer ring : transition fit
"What do you reckon is the ΔT of your inner ring/shaft in operation?"- ΔT is the difference in temperature between shaft and bearing inner ring during inner ring/ shaft operation (10° C)
"What do you reckon is the ΔT of your outer ring/housing in operation?"RE: Bearing effective interference
A hotter housing tends to reduce the effective interference.
A cooler housing tends to increase ( tighten ) it. To the point playing a cooling fan on a hot bearing housing to cool it off can result in excessive interference and possibly dangerously reduced internal clearance.