WESTport involute spline ring gages inspect external splined shafts for full-form composite error and functional diameter, confirming the shaft mates correctly with its internal spline.

Standards & setup

Manufactured to ANSI B92.1, ANSI B92.2M, ISO 4156, DIN 5480, and related involute standards, or to your print. Compatible with taper master plug gages for setup and verification.

Certification & quality

• Designed, ground, and hand lapped in-house for accuracy and long service life
• Certificate of Accuracy, NIST-traceable — included with every gage
• Calibrated in our ISO/IEC 17025 accredited laboratory; Long Form Certificate available on a 5–7 business day turnaround

Request a quote, or inspect internal bores with the Involute Spline Plug Gage.