65 products
RTD / RTDM Series Rethreading Dies
A damaged shaft thread is usually why a locknut will not run down square, and a cocked nut is why the bearing fails again. RTD (inch) and RTDM (metric) rethreading dies clean and repair bearing shaft threads in place — chasing burrs, nicks and corrosion back to the original profile without cutting new material and without pulling the shaft. Sizes correspond directly to the Whittet-Higgins locknut thread series.
RTD / RTDM Series Specifications
- Part numbers: RTD-00 through RTD-40; RTDM-00 through RTDM-38 (65 sizes stocked)
- Bore / shaft size (inch): 0.391 in to 4.716 in
- Bore / shaft size (metric): 10 mm to 120 mm
- Material & temperature: Case-hardened carbon steel; 300°F maximum operating temperature
- Standards: RTD to ANSI/ABMA 8.2-1999, RTDM to ISO 2982-2:2013; made in USA
Applications
Shaft thread repair during bearing replacement, spindle rebuild and field service, especially after a nut has been driven with a hammer and drift.
Related Whittet-Higgins Series
- N / AN Series Bearing Locknuts – Inch, SAE
- KM Series Bearing Locknuts – ISO Metric
- BAS Series Bearing Assembly Sockets – Inch
- NE Series Bearing Locknuts – Inch, 11 TPI
Apollo is an authorized Whittet-Higgins distributor. Every part on this page is genuine Whittet-Higgins, manufactured in the USA. Need a size that is not listed, or help matching a locknut to its lockwasher and assembly socket? Contact our team.

