Bearing Fit Tolerance Tool2026

Offline fit tolerance tool for mechanical design, machining and maintenance. Check shaft-hole tolerances, bearing fits, clearance and interference fast.

Bearing Fit Tolerance Tool is a fully local mechanical assembly calculator that requires no login and no account. It is designed for mechanical design, machining inspection, equipment maintenance and on-site assembly work.

Core features include:

1. Shaft-hole fit lookup: enter the basic size, hole tolerance zone and shaft tolerance zone to view upper and lower deviations and tolerance ranges.
2. Clearance and interference calculation: automatically calculate maximum clearance, minimum clearance, maximum interference and minimum interference, with fit type identification.
3. Bearing fit reference: save common fit recommendations for inner ring rotation, outer ring rotation, load direction, housing bore and shaft journal scenarios.
4. Assembly project records: store dimensions, measured values, fit conclusions and notes for each part for later review.
5. Units and error warnings: switch between mm and μm display, with clear marks when measured values are out of tolerance.

All data stays on your device. The app needs no account, does not connect to the internet and uploads no records, making it suitable for one-time purchase and long-term offline use.