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Description
The QD Sprocket 50CH 15TH JA (commonly designated by industry part number 50JA15 or 50JA15H) is a high-performance, single-strand Quick Detachable (QD) roller chain sprocket. It is precision-machined to pair with #50 standard roller chain (5/8" pitch) and features 15 teeth. It requires a JA-series tapered QD bushing (sold separately) to secure it tightly to a drive shaft.
Product Specifications
- Industry Part Number: 50JA15 / 50JA15H (Hardened variant)
- Compatible Chain Size: #50 (ANSI 5/8" Pitch)
- Tooth Count: 15 Teeth
- Required Bushing Type: JA Quick Detachable Bushing
- Bushing Bore Capacity: Accommodates shaft diameters from 3/8" up to 1-1/4" max bore
- Pitch Diameter (PD): 3.006 inches (76.35 mm)
- Outside Diameter (OD): 3.320 inches (84.33 mm)
- Hub Diameter: 2-1/16 inches (52.4 mm)
- Approximate Weight: 0.60 lbs (excluding the bushing)
Key Features
- Quick Detachable (QD) Design: Utilizes a split-tapered JA bushing system that uses mounting bolts to compress uniformly onto the shaft, delivering an exceptionally tight grip that minimizes keyway wear and shaft slippage.
- Induction-Hardened Teeth ("H" Models): Variants like the Martin 50JA15H feature induction-hardened tooth profiles, significantly extending operational life in abrasive environments or high-torque applications.
- Premium Manufacturing Standards: Fabricated from high-carbon steel to meet or exceed strict ANSI criteria, ensuring concentric alignment, parallel chain paths, and smooth engagement to reduce vibration.
- Versatile Sizing Changes: The QD setup allows you to easily switch out the sprocket size without purchasing a completely new bushing or remachining the system shaft.
Common Industry Applications
This drive component is heavily utilized across automated industrial conveyor tracks, sorting systems, packaging machinery, heavy agricultural implements, and specialized power transmission gearboxes.
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