1 Inch To One Eighth Inch Gas Engine Crank Shaft Sleeve Adapter With One Quarter Inch Step Key Kit For Pulley Bore Reduction Gear Box And Belt Drive Compatibility Converts Smaller Cranks To Fit Larger Pulleys And Sheaves Plug And Play

Crank Shaft Sleeve Adapter Kit for Pulley Size Upgrade
✔️ Converts 1 inch crank to 1 1/8 inch bore with 1/4 inch key sleeve

This compact sleeve kit lets you adapt a gas engine crank shaft from 1 inch to 1 1/8 inch so you can fit larger pulleys or gearboxes. It's ideal for belt drive setups, hobby projects, and workshop upgrades that require shaft diameter changes. Pack size: 1 kit.

Dimension	Inches	Millimeters
Crank shaft bore range	1.000" to 1.125"	25.4 to 28.58
Step key size	1/4"	6.35

✅ Sleeve range: 1.000" to 1.125" bore (25.4-28.58 mm)
✅ Includes 1 x 1 in to 1 1/8 in sleeve and 1/4 in step key
✅ Fits gas engine crank shafts, pulleys, and gearboxes requiring larger bore
✅ Plug-and-play installation with secure fit

💡 What is a crank shaft sleeve adapter used for?

Handy for adapting shaft diameters so you can run different pulleys and gearboxes on small gas engines.
- Converts shaft size for pulley and gearbox compatibility
- Handy for quick belt drive changes in DIY projects
- Uses the 1/4 inch step key for secure fit
- Works with 1 inch to 1 1/8 inch crank shafts for upgrades