Overview
The Martin 18L050 JA QD timing pulley is a professional-grade synchronous drive component engineered for reliable power transmission in industrial applications. Built to exact specifications with 18 teeth and a 0.375-inch (3/8″) pitch, this L-series pulley drives trapezoidal-tooth timing belts smoothly and without slip. The EF-1 flanged design with double flanges resists side thrust and maintains belt contact under load, while the JA quick-disconnect bushing bore allows tool-free shaft installation and removal for faster maintenance cycles.
Key Features
- Trapezoidal tooth form: Trapezoidal tooth form engages positively with matching belt teeth—no slip, no creep
- Non-slip toothed drive: Non-slip toothed drive with no metal to metal contact. No lubrication needed
- EF-1 Flanged construction: Double flanges on the pulley resist side thrust and maintain belt contact
- JA QD bushing bore: Quick-disconnect bushing system for fast assembly and disassembly without tools
- High carbon steel: Made of high carbon steel for tensile strength and hardness
- Precision machining: Precise machining and processes ensure consistent finish and high quality
Technical Specifications
- Number of Teeth: 18
- Belt Pitch: 0.375 in (3/8″)
- Belt Type / Series: L050 (for 1/2″ wide belts)
- Belt Width: 0.5 in (1/2″)
- Pitch Diameter: 2.149 in
- Outside Diameter (OD): 2.119 in
- Bore Type: Reboreable / Minimum Plain Bore
- Bore Diameter Range: 0.5 to 1.1875 in
- Face Width: 3/4 in (0.75″)
- Flange OD: 2.3906 in
- Hub Diameter: 1.5625 in (1 11/16″)
- Hub Projection: 0.625 in (5/8″)
- Overall Length: 1.375 in (1 3/8″)
- Material: Steel (high carbon)
- Pulley Type: EF-1 Flanged
- Bushing Type: JA Quick Disconnect (QD)
- Weight: 0.4 lbs
Typical Applications
The Martin 18L050 Timing Belt Pulley is a dependable choice for synchronous drive applications, designed with a 0.375-inch pitch and 18 teeth for precise power transmission. Common uses include:
- Printing and paper machinery
- Packaging and labeling equipment
- Conveyor and material handling systems
- Automation and light-duty transmission drives
- Office equipment and textile machinery
- Any application requiring many of the best features of chain drives and belt drives
Compatibility & Replacements
Compatible With
- L-series timing belts, 3/8″ pitch, 1/2″ wide (L050)
- Trapezoidal-tooth synchronous belt drives
- JA quick-disconnect bushings (bushings sold separately)
- Standard timing belt drive layouts and machinery
Replaces / Drop-In Replacement For
- Martin 18L050 DF-1 (solid bore version, with bushing adaptation)
- Other 18-tooth, 3/8″ pitch pulleys in equivalent L-series applications
Works With
- L050 timing belts (0.375″ pitch, 1/2″ wide)
- JA series quick-disconnect bushings
- Standard shaft-mounting hardware and keyways
- Industrial power transmission systems requiring synchronous drive
