“ Gear quality can only be assured through the use of accurate, dependable testing instruments and gages „

Are you in the market for a "Double Flank Roll Tester" upgrade? Look no further!

Geartrology offers complete rebuilding and retrofitting of your instrument with the industry's best in electronic components and custom software.

Mechanical rebuilding: a complete disassembly of the instruments, rescraping the axis, replacing worn components with new and repainting with industrial grade epoxy.

Electronics: National Instruments, a globally recognized superior quality electronics platform.

Software: Geartrology software was custom designed specifically for the NI platform, using Labview PC-based application for data acquisition.

Gear Measuring Instruments

If you own a double flank roll tester that does not have current technology, Geartrology offers a complete remanufacture of your instrument fitted with today’s state of the art electronics and Geartrology’s elaborate and sophisticated yet simple and user-friendly double flank gear analyzer software.  Special gear measurement fixtures are available upon request.  Please send inquiry.

Instrument Accessories

Geartrology offers new replacement parts for your double flank gear roll tester.
Master spindle
         AGMA standard
         FELLOWS standard
Outboard support
Upper and lower centers
         Bull nose

Contact Geartrology with any special requirements.

Master Gears / Spline Gages

Geartrology offers AGMA/ISO certified master gears and spline gages.  Send your requirement for a quote.

Inspection / Reverse Engineering Services

Geartrology offers simple to complex reverse engineering of gears and/or gear trains.  Basic gear data can be reverse engineered and provided, or complex information can be reconstructed in order to obtain FAA PMA certification.  Send your requirement for a quote.  Gear analytical inspection services are available upon request.  Please send inquiry.

Geartrology offers remanufacturing of "Double Flank Roll Testers" by most OEM manufacturers!


Typical upgrade/retrofitted model numbers:

Fellows Corporation; Type: 4 Fine Pitch, 4RL, 20M, 24RL & 600RL