We offer sprockets for clarifier scraper systems: integrally molded HMAX 720-type sprockets with a UHMW tooth profile and a split polyurethane hub, non-metallic sprockets with shear-pin overload protection, and jaw clutch assemblies. HMAX sprockets are available in 23-, 19-, and 17-tooth configurations and run with non-metallic as well as steel or cast-iron 720-series chains. Shear-pin assemblies protect the collector drive from the consequences of an overload: if the system jams, the shear pin breaks and the extending trip pin can work with a limit switch, shutting off the motor or triggering an alarm. All sprockets are maintenance-free — they require no lubrication and do not corrode in the wastewater environment.
Last updated: 12 July 2026
720-style sprockets in a three-piece, integrally molded design. Teeth of extreme wear resistance, split polyurethane hub.
Non-metallic sprocket with urethane hub and Nylon 6 teeth, with a shear-pin assembly protecting the drive from overload.
Heavy-duty jaw clutch / shear-pin assembly with cast nylon bodies and shear protection. Omni-directional hub for smooth drive engagement.
Under overload (e.g., a jammed scraper), the aluminum shear pin breaks in a controlled way, disconnecting the drive before the chain, shaft, or gearbox is damaged. The extending trip pin can additionally actuate a limit switch to stop the motor or trigger an alarm.
Yes — HMAX 720 sprockets work with cast-iron, steel, and non-metallic 720-series chains. You can use them in a phased upgrade: sprockets first, chain later (or the other way around).
Shear-pin sprockets are available with bores from 20 to 80 mm, standard in an 11-tooth configuration (other sizes on request). HMAX 720 sprockets come in 23-, 19-, and 17-tooth configurations with a glass-reinforced nylon bore.
No. The polyurethane hub and nylon/UHMW teeth run maintenance-free for their entire service life — no grease fittings and no lubrication lines, which eliminates inspection costs.
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