Full Range—Designed and machined to match machine shaft ends.
Taper Contact 90% to 95% guaranteed with bluing tapes provided.
Meets or Exceeds API 671 and ISO 10442 requirements.
Made from UNS860 Tool Steel, A6 Tool Steel or 440C Stainless Steel.
Minimum gage hardness of 58 HRc. Double thermal stabilized for longevity.
Calibration, Certification and Storage services available.
Lapping Tools Provided:
- Full coverage of mating & female tapers.
- Can be machined matched to existing tapers.
- Guaranteed minimum of 90% taper contact with confirming bluing tapes supplied with certification report.

Riverhawk has designed a full range of plug and ring gages developed specifically for the rotating machinery used in the petrochemical industry. Our gages are supplied with a certification and calibration traceable to N.I.S.T. They meet of exceed all API 671 and ISO 10442 requirements.