Overview
The Martin 80BS15-1-3/8 is a Type B finished bore sprocket designed for reliable engagement with #80 roller chain (1″ pitch). This bored-to-size sprocket arrives complete with a machined 1-3/8″ bore, integrated keyway, and two setscrews—enabling immediate installation on a shaft without additional boring, keying, or machining. Martin 80BS15-1-3/8 sprockets deliver the efficiency and durability that mechanical power transmission systems demand.
Key Features
- Finished bore with integral keyway and dual setscrews for direct shaft mounting
- High carbon steel construction for strength and long service life
- Type B hub (B-hub, one side) design optimizing hub diameter and clamping performance
- Single strand, 15-tooth configuration matched to #80 chain pitch
- 5.305″ outside diameter and 4.81″ pitch diameter for precise engagement
Technical Specifications
- Chain Type: ANSI #80 Roller Chain
- Chain Pitch: 1″ (1.000″)
- Number of Teeth: 15
- Bore Diameter: 1-3/8″ (1.375″)
- Outside Diameter: 5.305″
- Pitch Diameter: 4.81″
- Hub Outside Diameter: 3-13/16″ (3.8125″)
- Hub Type: B-Hub, One Side
- Keyway: Yes (5/16 × 5/32″)
- Setscrews: Two (5/16-18 × 5/16″)
- Material: High Carbon Steel
- Strand Count: Single
- Teeth Hardened: No
Typical Applications
Martin 80BS15-1-3/8 sprockets are well-suited for low-power transmission applications including:
- Conveyors and material handling systems
- Agricultural and food processing equipment
- Light industrial machinery and equipment drives
- Blowers, pumps, and compressor drives
- Belt and chain reduction assemblies
Compatibility & Replacements
Compatible With
- #80 ANSI single-pitch roller chain
- Standard 1-3/8″ diameter shafts
- Systems using 1″ pitch chain (80A, 80B, and 80H sprocket series)
- Equipment designed for Type B finished bore sprockets
Replaces / Drop-In Replacement For
The Martin 80BS15-1-3/8 directly replaces any sprocket with equivalent specifications: 15-tooth, 1-3/8″ bore, Type B, #80 chain, 1″ pitch. Verify your original part number and bore diameter before ordering.
Works With
- All #80 ANSI standard roller chain
- Shafts with compatible keyway dimensions (5/16 × 5/32″)
- Existing power transmission systems using 1″ pitch chain drives
- Standard mechanical mounting hardware (bolts, spacers)
