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FIT series
SLIDE BUSH + SHAFT, Right-Fit Adjustment


FIT SERIES
NB's FIT Series takes advantage of Nippon Bearing's high accuracy technology to achieve a target clearance.
【Applicable products】
SLIDE BUSH, SLIDE BUSH BLOCK SERIES, SLIDE ROTARY BUSH, STROKE BUSH
 
 
 problem
 
FIT Series
Have you ever experienced these?                                   

> difficulty in matching fit?

Due to the combined tolerances of the bush's
 
bore and the shaft's diameter, accuracy can
be affected by 'clearance' or increased
dynamic friction caused by preloading.

> obtaining the proper fit?
 

In some extreme cases, designs have been
sacrificed over to other 'types' of linear
products to prevent excessive radial
clearance or preload resulting
in higher production component costs.
 
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part number structure
 
Part numbering
 
 
 
 
 
 
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Clearance
 
 
Depending on the application the range varies. The chart below is a guideline.
Clearance limits
 
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 Clearance(-) Limit
 
 
Negative clearance is opted to reduce backlash. Please refer to the below chart for the recommended
negative clearance (preload) limit.
 
Size 3~8 10~13 16~25 30~35 40 50~60
Radial Clearance Limit -3μm -4μm -6μm -8μm -10μm
-13μm
 
The off-center of the housing causes uneven loading on the Slide Bush. Please pay special attention to the centering of the housing especially when negative clearance is required
Please contact NB for details on the radial clearance such as when extra preload is required for other part numbers like SRE, SR, etc.