Extended 1 to 1 1/ 8 inch 1/4" Key Gas Engine Pulley Crank Shaft Sleeve Adapter

Crank Shaft Sleeve Adapter

This extended gas engine pulley crank shaft sleeve adapter converts a 1-inch shaft to a 1-1/8-inch diameter while maintaining a 1/4-inch keyway interface.

Overview

This extended gas engine pulley crank shaft sleeve adapter is engineered to bridge diameter differences between engines and driven accessories. By enlarging the crank diameter, this extended gas engine pulley crank shaft sleeve adapter allows standard pulleys to slide securely onto mismatched shafts. Mechanical builders and technicians will find this extended gas engine pulley crank shaft sleeve adapter extremely useful for custom machinery builds.

Built For Performance

• Precision-machined steel alloy provides excellent concentricity and strength.
• Integrated keyway slot maintains alignment for standard 1/4-inch keys.
• Extended length design ensures full engagement inside deep pulley hubs.
• Corrosion-resistant surface finish prevents seizing over long-term outdoor operation.

On-The-Job Use

• Adapting replacement utility engines to legacy drive pulleys.
• Converting crank diameters during custom lawnmower engine repower projects.
• Fitting oversized pulley clutches to standard industrial water pumps.

Specs At A Glance

Good To Know

Q: Is the key stock included with this adapter? A: Yes, the matching step key or straight key stock required for installation is included in the kit.

Q: Can this be used on high-RPM engines? A: Yes, the precision machining allows it to handle standard utility engine operating speeds without balance issues.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.