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How to inspection slide bearings, oilless bushings, plain bearings,wrapped bushes?
Plain bearings and wrapped bushes are produced according to ISO3547 standard, so inspection ways, data also included in this standard.
ISO 3547-1:2006 Part 1: Dimensions
ISO3547-2:2006 Part 2: Test data for outside and inside diameters
1. Outer Diameter
Tools: Outer diameter of bush is tested by Ring Gauges, there are two Ring Gauges made according to the tolerance limits of OD.
Operation: When testing, push the bush through hole of Ring Gauge:
- Up limit of OD Ring Gauge: Go = OK ; (the bush OD is too big if NO GO)
- Down limit of OD Ring Gauge: NO GO = OK ; (the bush OD is too small if GO)
2. Flange Diameter (only flanged bushes required)
Tools: Flange diameter of bush is tested by vernier caliper
Operation: When testing, put the bush into Ring Gage, then measure by vernier caliper
3. Inner Diameter
Tools: Plug Gauge and Housing(or Ring Gauge), there is a Ring Gauge made according to the tolerance limits of ID.
Operation: Put the bush into a block housing with certain pressure or Ring Gauge first:
- Up limit of ID Plug Gauge: NO GO = OK ; (the bush ID is too big if GO)
- Down limit of ID Plug Gauge: GO = OK ; (the bush ID is too small if NO GO)
Here is the pressure list for split type housing
4. Height
Height is measured by vernier caliper directly
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