SKF
Gauges (Super-Precision)
SKF supplies a range of precision gauges specifically for measuring the critical parameters of bearing seats on shafts and in housings before mounting super-precision bearings. These include air gauges, dial indicators, and special dimension-measuring fixtures for checking bore diameter, taper angle, roundness, and runout. Proper gauging ensures that the shaft and housing meet the exacting tolerance and geometric requirements necessary to achieve the bearing’s rated accuracy. Using SKF gauges as part of the mounting procedure prevents the installation of precision bearings onto out-of-spec seats, which would compromise runout, preload, and service life. These measuring tools are an integral part of quality assurance in spindle manufacturing and repair.
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Trusted by Industry Leaders
Verification of Seat Accuracy
Check tolerances to P4/P2 requirements.
Portable and Robust
Designed for workshop and on-site spindle repair.
Taper Measurement
Specifically for tapered shafts in cylindrical roller bearing mounting.
High Resolution
Indication to 0.001 mm or better.
Prevent Mounting Errors
Catch seat issues before bearing installation.
Documented Quality
Provides traceable measurement records.
Measuring Tapered Shaft Seats for NN 3000 K Series Bearings
The correct taper angle and diameter are critical for the radial clearance reduction method. SKF provides special caliper gauges that measure the shaft diameter at a specific reference distance, ensuring the bearing will achieve the intended clearance or preload after drive-up.
Why Seat Geometry Matters for Super-Precision Bearings
Out-of-roundness or taper error in the shaft seat is transferred through the thin inner ring to the raceway, causing sub-micron runout errors. SKF gauges help identify and correct these issues before the bearing is mounted, preserving spindle accuracy and preventing premature replacement.