Overview
The Martin Sprocket 50BTB28 is an ANSI #50 roller chain sprocket with a taper-lock bushing (2012) pre-bored for quick installation onto your shaft. This taper-bushed configuration uses hex head set screws instead of traditional bolts, allowing the tapered bushing to compress tightly onto the shaft for secure, slip-free power transmission. The 50BTB28 is ideal for industrial drives, conveyors, and machinery requiring reliable chain drive performance.
Key Features
- Taper-Lock Design: Tapered bushing bolted into taper bore compresses onto shaft when tightened, eliminating shaft slippage and drift
- #50 Chain Compatible: Fits ANSI #50 roller chain (5/8″ pitch) for standard industrial power transmission
- 28-Tooth Configuration: Provides optimal speed and torque characteristics for mid-range drive ratios
- 2012 Bushing Size: Standard 2012 taper bushing bore for common shaft diameters and straightforward field replacement
- Hex Head Set Screws: Simplified installation using standard wrenches; no bolts required
- Industrial-Grade Build: Martin manufactures to tight tolerances and industry standards for durability and long service life
Technical Specifications
- Manufacturer: Martin Sprocket & Gear
- Part Number: 50BTB28
- Chain Type: ANSI #50 Roller Chain
- Chain Pitch: 5/8″ (0.625″)
- Tooth Count: 28
- Bushing Type: Taper-Lock 2012
- Weight: 1.34 lbs
- Material: Gray Iron or Steel (per application)
- Standard Stock Bore Sizes: Check with supplier for available bore range
- Installation Method: Hex head set screws with alternating torque procedure
Typical Applications
- Industrial conveyor systems and material handling equipment
- Power transmission in machinery drives and pump applications
- Mid-range speed reduction drives requiring sturdy chain coupling
- OEM equipment requiring ANSI #50 chain drive configuration
- Retrofit and replacement of worn or damaged taper-bushed sprockets
Compatibility & Replacements
Compatible With
- ANSI #50 Roller Chain (5/8″ pitch, single-strand or multi-strand)
- Martin 2012 Taper Bushing (included or available separately)
- Shafts bored to 2012 bushing standard bore sizes
- Industrial power transmission drives and conveyor systems
- Equipment originally specified with 50BTB28 sprockets
Replaces / Drop-In Replacement For
- Other Martin 50BTB28 units in service or surplus inventory
- Equivalent OEM #50 taper-bushed sprockets with 28 teeth and 5/8″ pitch
- Worn or damaged 50 chain sprockets requiring taper-bushing upgrade
Works With
- Martin taper bushing installation tooling and removal procedures
- Standard mechanical power transmission assemblies
- Field-adjustable hex head set screws and standard wrenches
- Industrial plant maintenance and retrofit programs
