TechTorque™ Inertia Drives - Assuring 100% Engagement
TDI Has Improved Drive Performance and Reliability With the Next Generation of Inertia Drives

When a fire-pump, emergency gen set, or other critical application has to start every time, the solution is always inertia-engagement. And no offers more reliability in inertia drives than TDI.
The next generation Tech Torque Drive from TDI has been refined and improved at almost every component level, resulting in the world’s best performing and most reliable inertia drives. Design and manufacturing improvements include:
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Ability to yield more consistent torque values across the entire operating range of TDI starters through better dimensional control in the “stack-ups” and controlled assembly process.
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Reduction in number of parts by 22%
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New internal clutch loading spring prevents possible damage during handling
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Better resistance to contaminants of all kinds – no control air required
TechTorque Inertia Drives are more rugged, more resistant to contaminants, and deliver a very narrow bandwidth of torque values. That means improved reliability for TurboTwin Air Starters, and improved reliability for anyone who chooses TechTorque as an OEM component.
TechTorque drives are now completely manufactured by TDI meaning inventory, parts, lead times, and minimum quantity orders have also been improved, as well our cost to manufacture which allows us to actually charge less for an improved product.
Inertia Engagement vs. Pre-Engagement:
An Engineering Shift is Taking Place
Conventional mechanical engineering thinking used to be that pre-engaged engine starting was simply more reliable. Conventional conclusions have now given way to critical engineer thinking and today almost all fire pumps, emergency gen sets, and all engine starting at nuclear power plants require inertia engagement.
Why?
Inertia engagement will engage immediately and will engage 100% of the time. It’s all in the mechanics. Fewer moving parts, only one air line, and no delay waiting for the pinion and/or turbine to come to a complete stop before starting.
This reliability is also why almost all packagers, system integrators, and knowledgeable aftermarket purchasers have made inertia-engagement their clear choice.
See TechTorque Drive engagement. Click here to view video clip.