WESTport helical spline plug gages provide Go/No-Go inspection of internal helical splines, built to your helix angle and hand. They verify composite error, tooth form, and effective/actual size on helical splined bores.

Made to your specification

Manufactured to major involute spline standards or to your drawing. Specify helix angle, hand, module/diametral pitch, and number of teeth on your request.

Certification & quality

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

Request a quote with your spline data.