Tolerance Mate
ISO 286 tolerance calculation, fit analysis and PDF reports in one app.
- ISO 286-1 / 286-2
- Fit analysis
- PDF report
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Engineering Catalog
On Google Play: Gear, Bearing, Torque, DXF, STL
A pocket technical database for bolts, keys, gears, bearings and seals.
Get it onGoogle PlayLast updated: July 24, 2026
- ISO / DIN / ANSI
- Taper and keys
- DXF / STL
- PDF report
Screenshots
What does it do?
Engineering Catalog is a comprehensive technical database and calculation tool for anyone working in machine design and manufacturing. It brings the dimension tables and calculations you need in the workshop and design office into one app.
It covers bolt, nut and washer dimensions to ISO, DIN and ANSI, taper and key calculations, tightening torques by property class, and DXF and STL output.
Features
Taper and slope
- End diameter from start diameter, slope ratio and length
- Narrowing and widening taper options
- Quick checks for turning and milling
Keyway engineering
- Standard key sizes by shaft diameter
- Keyway depths
- Torque capacity of keys
Standards archive
- Hex bolts, socket head screws, nuts and washers
- Bearings, pistons, circlips, gears and seals
- ISO 286 tolerance values
Torque and reports
- Tightening torque in Nm for 8.8, 10.9 and 12.9
- PDF report of data and results
- DXF and STL output
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Bearing Catalog
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- Widget
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- PDF output
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Engineering Torque Calculator
Five calculators for bolt preload, motor torque, shaft diameter and unit conversion.
- 5 calculators
- Live results
- Nm / lb-ft
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