Axle generator, to install on the axle of a locomotive, measures speed and wheel slip conditions for better tractive effort



TMV Axle Generators, manufactured in-house with stringent tolerances,
precisely generate signals to serve as a reliable reference in capturing true wheel speed.



In addition to their high degree of accuracy in matching axle rotation, TMV Axle Generators are meticulously constructed with superior materials for durability – all within a compact profile at an affordable price.  


The result: customers can count on correct wheel speed that can be conveyed to the control system,
so that proper adjustments can be made to minimize wheel slip and maximize adhesion.


Details on the TMV 3-wire Axle Generator:

The axle generator operates on a 10-20 VDC supply from an isolated source.  This power supply is typically provided from the TMV TECU at 12VDC.  A single cable, carrying power and the output signal, connects to the generator via a Military Specified (MILSPEC) type connector.

Types Available:

  • 60 ppr
  • 120 ppr
  • Magnetic Axle Gen in 20ppr or 60 ppr


Black TMV axle gen Magnetic Passive 2 wire sophisticated design
TMV’s Magnetic Axle Gen

Magnetic Axle Gen

top view of TMV magnetic axle gen to show its ultra slim profile low profile design
TMV Magnetic Axle Gen has an UltraSlim profile

TMV offers a direct replacement to 2-wire, Passive axle generators. These magnetic axle gens reliably measure wheel rotation and wheel speed at 20ppr (20 pole) and 60ppr (60 pole) output designations.

Older locomotives, such as pre-1990’s locomotives, often require this 2-wire magnetic axle alternator to communicate with their onboard computers, control systems, speedometers, speed recorders, event recorders, and other devices that require speed data.

The new TMV magnetic axle gen is a simple but sophisticated device designed for easy install and all things familiar. Oil free, with a standard driveshaft, easy access to bolts for install, this is the straightforward and clear choice for those wishing to save time and money.


WheelSlip Testing Video – Notice how the TMV wheel gains speed more evenly and progressively, resulting in a higher speed sooner with less slip.

LTEX Locomotives Website – click here

Axle Gens on Locomotives


Ask us about PTC applications!
Click here to email TMV sales.
Click here to fill out an information request form. 





Technical Information and Photos:

TMV manufactures 60 pulse (PPR) Part # T-17102/01 and 120 pulse (PPR) Part # T-06102/00 active axle generators which can serve as direct replacements to other brands of axle generators.

  • Showing TMV axle generator with low profile and bracket for connecting to locomotive
  • TMV axle generator rear view with cable and bracket
Installed Axle Generator from TMV, brand new and shiny to modernize for better control and calculated adhesion
Installed Axle Generator
  • Brand X vs. TMV profile
  • Brand X vs. TMV profile

Click here to see Knoxville Locomotive Works website page Locomotives that Emit Less, Consume Less, and Do More

speed probe wire suited for speed probe port on traction motor for speed evaluation this one has three wires and no delicate resistor more robust
TMV Speed Probe


If your locomotive has traction motors fitted with speed probe ports,
or if you prefer the no-profile safety of a speed probe, click here.