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Nothing Impacts Starter Reliability Like the Clutch
More Contact Points Deliver Better Engagement Reliability
TDI’s proprietary sprag clutch design is the industry’s most reliable because of its ability to handle high torque and its operational characteristics which provide the longest service life intervals of any air starter. What we’ve done is pack 22 contact points which evenly disperses the torque through the clutch vs. the 3 or 13 points common on other style clutches. The result is more load carrying members, greater contact area and the ability to handle torque loads that could cause other clutches to fail. In addition, when the TDI clutch is disengaged (during engine operation) the sprags will actually lift off the inner race thus eliminating any contact and therefore virtually eliminating wear during the normal engine run hours during operation.

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