20T Worm Gear Replacement for 40 to 42 Inch Snowblowers as a Go-To Fix 1-7/8 Inch OD Fits Craftsman Cub Cadet Troy-Bilt Sears and More with Part Numbers 717-0528A 717-04449 917-0528 917-04861 717-04861

Reliable 20 Tooth Worm Gear Replacement for 40-42 Inch Snowblowers
✔️ 20 teeth, 1-7/8 inch OD, 3/4 inch ID, 5/8 inch width, 3/16 inch keyway

This worm gear acts as a direct drive component in snowblower auger systems and fits many 40 to 42 inch machines from common brands.

✅ 20 teeth cut for smooth power transfer to the auger
✅ 1-7/8 inch outer diameter matches standard snowblower shafts
✅ Keyway slot accepts a woodruff key for secure fit on the output shaft
✅ Works as replacement for part numbers 717-0528A and similar

💡 What is a worm gear used for in snowblowers? A worm gear transfers power from the engine to the auger in a compact and efficient way. - It keeps the auger spinning steadily through heavy snow - The design reduces slippage and handles torque without extra parts - Compatible units slide onto existing shafts using the built-in keyway

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