Taper Ring Gages

Taper ring gages check the external taper — the shank of a tool, arbor or spindle that seats into a tapered bore. The ring verifies the rate of taper and the seating position, so the mating parts make full contact rather than bearing on one end.

Taper standards we supply

• Morse — machine-tool shanks for drills, reamers and centres.
• Jarno — constant taper rate across the numbered series.
• Brown & Sharpe — shallow taper for milling collets and arbors.
• National Machine — steep taper for quick, clean tool release.

How they are supplied

Every gage ships with a certificate of accuracy traceable to NIST, with final inspection completed in an environmentally controlled ISO/IEC 17025 accredited laboratory. Plug gages for the mating internal taper are on the Taper Plug Gages page.