Overview
The Martin 16B25 roller chain sprocket is a metric Type B simplex sprocket designed for power transmission applications. Martin 16B25 is manufactured from high-carbon steel and provides reliable engagement with ISO 16B-1 metric roller chain (0.375 inch / 25.4 mm pitch). This sprocket features a Type B hub design with a single strand configuration, making it suitable for driver or driven sprocket applications in industrial machinery.
Key Features
- 25 teeth with consistent pitch diameter for smooth chain engagement
- Type B hub design provides stability and accommodates standard keyways and setscrews
- High-carbon steel construction delivers strength and durability for heavy-duty applications
- Reboreable – standard plain bore ready for boring to metric or standard shaft sizes
- ANSI standards compliant – meets or exceeds American National Standards Institute specifications
Technical Specifications
- Part Number: 16B25
- Sprocket Type: Type B Simplex (Single Strand)
- Chain Number: 16B-1 (ISO 16B-1, Metric 80)
- Teeth Count: 25
- Chain Pitch: 25.4 mm (0.375 inch / 1.00 inch)
- Pitch Diameter: 202.66 mm
- Minimum Bore: 25.02 mm
- Maximum Bore: 75 mm
- Material: High Carbon Steel
- Teeth Hardening: Without Hardened Teeth (Standard)
- Bore Style: Standard keyway and setscrew over keyway accommodation
Typical Applications
The Martin 16B25 sprocket is used in:
- Metric roller chain drive systems for industrial conveyors and transfer equipment
- Power transmission in machinery requiring ISO 16B-1 chain engagement
- OEM equipment and retrofit applications in manufacturing, packaging, and processing industries
- Systems requiring metric pitch chain (25.4 mm) in mid-range speed and torque applications
Compatibility & Replacements
Compatible With
- ISO 16B-1 metric roller chain (BS 228/15 standard)
- Metric 80 chain designation
- Chain pitch 25.4 mm (0.375 inch)
- Industrial machinery using metric sprocket configurations
- Driver and driven sprocket positions in chain drive systems
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The Martin 16B25 is a stock specification; confirm bore and keyway requirements match your existing installation.
Works With
- ISO 16B-1 metric roller chain standard
- Standard keyseat and setscrew mounting configurations
- Metric bore sizes (25.02 mm minimum to 75 mm maximum)
- Custom boring to accommodate specific shaft diameters
- Martin chain drive systems and third-party compatible chains meeting ISO 16B-1 specifications
