Overview
The Martin Sprocket SD-1-5/8 QD quick disconnect bushing is a precision-engineered shaft coupling component designed for mounting pulleys, sheaves, and sprockets in industrial drive systems. This Martin SD quick disconnect bushing is made of ductile iron and is used for mounting a quick disconnect pulley, sheave, or sprocket on a drive shaft. The SD-1-5/8 model serves as a reliable foundation for power transmission assemblies requiring secure, repeatable mechanical engagement without welding or permanent fastening.
Key Features
- Split-Taper Design: It is split through the flange and taper to provide strong clamping on the shaft.
- Ductile Iron Construction: The bushing is made of ductile iron for greater strength than gray cast iron and resistance to wear, galling, and corrosion.
- Keyed Shaft Interface: It is keyed to the shaft to prevent the shaft from rotating in the bushing, and it has a set screw over the keyway to help keep the key in place on vertical shafts and with vibrating loads.
- Quick Disconnect Capability: QD (quick detachable) bushings are designed for conventional mounting or reverse mounting.
- Flanged Design: These bushings have a flange.
Technical Specifications
- Bore Size: 1-5/8″
- Keyway: 3/8″ x 3/16″
- Material: Ductile Iron
- Bushing Type: SD (Standard QD)
- Weight: 1.050 lb
- Split Design: Yes, through flange and taper
- Keyway with Set Screw: Yes
Typical Applications
The Martin SD-1-5/8 is suitable for a broad range of industrial applications including conveyor systems, agricultural equipment, construction machinery, pump drives, fan assemblies, and general power transmission where pulley or sprocket mounting requires tool-free engagement and disengagement. The quick-disconnect format enables rapid changeovers without shaft removal or structural modifications.
Compatibility & Replacements
Compatible With
- Martin QD pulleys with 1-5/8″ bore tapered hubs
- Martin QD sprockets with 1-5/8″ bore tapered hubs
- Martin QD sheaves with 1-5/8″ bore
- Standard 1-5/8″ metric and inch-bore shafts
- Drive shafts fitted with 3/8″ x 3/16″ keyways
Replaces / Drop-In Replacement For
- Martin SD-1-5/8 (original/previous production lots)
- Functionally equivalent to TB Woods and other industry-standard 1-5/8″ split-taper QD bushings
Works With
- Martin power transmission component ecosystems (pulleys, sprockets, sheaves)
- Standard keystock and fastening hardware for QD bushing assembly
- Pull-up bolt and torque-wrench installation procedures as specified in Martin QD bushing mounting documentation
