Overview
The Martin 35BS15HT 3/4 is a finished-bore roller chain sprocket engineered for standard industrial power transmission. This Type BS (bored-to-size) unit is pre-machined with a 3/4″ diameter bore, integral keyway, and set screws, eliminating the need for additional boring or hub components. Manufactured from high-carbon steel, it delivers consistent performance in low- to medium-power applications.
Key Features
- Bored-to-Size Design: Pre-machined bore and keyway allow direct shaft mounting without additional components
- High-Carbon Steel Construction: Provides strength and durability in demanding drive systems
- Integral Set Screws & Keyway: Two 1/4-20 set screws and 3/16″ × 3/32″ keyway for secure shaft attachment
- Single-Strand Compatibility: Designed for No. 35 ANSI roller chain at 3/8″ pitch
- Hub Extension: One-side hub extension ensures stability and enables full-depth keyway seating
Technical Specifications
- Bore Diameter: 3/4″ (0.750″)
- Number of Teeth: 15
- Chain Pitch: 3/8″ (0.375″)
- Pitch Diameter: 1.804″
- Outside Diameter: 1.989″
- Hub Diameter: 1-11/32″ (1.344″)
- Hub Length Through Bore: 3/4″
- Keyway Size: 3/16″ × 3/32″
- Set Screws: Two 1/4-20 × 1/4″
- Material: High-carbon steel
- Hardening: Not hardened (standard)
- Strand Configuration: Single strand
- Weight: Approximately 0.25 lb
Typical Applications
Martin 35BS15HT sprockets are widely used in low-power conveyors, packaging machinery, agricultural equipment, and light industrial drives. The finished-bore design suits applications where the shaft diameter and speed are moderate and durability requirements are moderate.
Compatibility & Replacements
Compatible With
- ANSI No. 35 roller chain (3/8″ pitch)
- Shafts with 3/4″ diameter bore
- Low- to medium-power industrial drives
- Electric motors and gearbox outputs using standard roller chain transmission
Replaces / Drop-In Replacement For
- Martin 35BS15 3/4 (equivalent designation)
- Other 15-tooth, 3/8″ pitch No. 35 chain sprockets with 3/4″ bore (verify hub length and set screw placement)
Works With
- ANSI B29.1 standard roller chain
- No. 35 chain links and connecting pins
- Standard industrial shaft couplings and motor flanges
- Industrial power transmission systems requiring ANSI-spec chain drives
