812737 Gear Reducer SK72-W 3.86:1 1750/453 RPM

The 812737 Gear Reducer by Blackmer is a mechanical power transmission component designed specifically for pump applications. 

Constructed with durable materials such as cast iron and high-strength steel, the gear reducer features precise machining for reliable gear alignment and long-term operation. Its robust construction includes sealed bearings and corrosion-resistant finishes, suitable for demanding industrial environments.

The physical dimensions of the 812737 Gear Reducer include a flange-mounted design with dimensions compatible with standard pump shafts. It provides an input shaft diameter of approximately 1.25 inches and an output shaft compatible with models requiring a 1.25-inch shaft, with overall dimensions around 8 inches in length and 6 inches in height. It weighs approximately 15 kilograms (33 pounds), making it suitable for mounting on various pump configurations.

The gear reducer offers a gear ratio of 3.86:1, effectively converting an input speed of 1750 RPM to an output speed of approximately 453 RPM, which optimizes pump performance while maintaining torque levels. It features a sealed, oil-lubricated gear assembly, with a standard mounting pattern for easy installation. The reducer includes a breather, oil seal, and oil fill port, facilitating maintenance and operational reliability.

Use cases for the 812737 gear reducer include controlling pump speed and torque in industrial fluid transfer systems, particularly with positive displacement and sliding vane pumps. It is ideal for applications requiring precise speed reduction to enhance pump longevity, performance, and efficiency. The 812737 gear reducer is suitable for industries such as chemical processing, water treatment, and food production, where reliable pump operation is critical. Its design minimizes budget impact by providing durable, long-lasting performance, fitting within a range of cost-conscious applications.

The package includes the gear reducer unit with mounting hardware, oil fill, and breather. Not included are the motor and pump components, which must be selected to match the reducer specifications.

Maintenance of the 812737 gear reducer involves regular oil checks, lubrication per manufacturer guidelines, and periodic inspection of seals and fasteners. The unit requires oil change approximately every 2000 hours of operation or as specified in the maintenance manual. It comes with a standard one-year warranty covering manufacturing defects and material failures, provided proper care and maintenance are observed.