812440 Gear Reducer SK871.1Z 3.42:1, 210TC

The 812440 Gear Reducer by Blackmer is a high-precision mechanical  component designed for efficient power transmission in pump systems.

Constructed with durable metal gearing and corrosion-resistant coatings, the 812440 Gear Reducer features a 3.42:1 reduction ratio and an industry-standard 210TC motor interface. Its robust construction ensures reliable operation under demanding conditions, including positive displacement and sliding vane pump applications. The reducer's housing and internal components are engineered for long service life and minimal maintenance, supporting continuous system performance.

The unit measures approximately 10 inches in length, 6 inches in width, and 8 inches in height, with a weight of around 12 kilograms (26.5 pounds). The 210TC interface accommodates motors with a 1.1-inch shaft diameter and keyway, compatible with standard motor mounting patterns. It is suitable for motors operating at up to 1750 RPM, providing a controlled lower output speed to optimize pump performance and protect system components. The gear reduction ratio ensures torque multiplication and speed reduction essential for demanding pump tasks.

Key features include a precision-ground gear train for smooth operation, sealed input and output shafts to prevent lubricant leakage, and a require lubricant recommendation of high-quality gear oil per manufacturer specifications. The design allows for straightforward installation with correct alignment—minimizing angular and parallel misalignment—and requires compatible coupling or belt drive for connection to the motor and pump. Regular inspection of oil levels, alignment, and fasteners is advised for optimal longevity. The unit is designed for easy maintenance, with access to internal components for periodic service.

The 812440 Gear Reducer is ideal for use in industrial fluid handling, chemical processing, and municipal pumping systems. It is recommended for users seeking a reliable, long-lasting gear reducer that ensures consistent pump operation, reduces maintenance costs, and improves overall system efficiency. It is especially suitable for applications where precise speed and torque control are critical, and for those on a budget looking for durable, cost-effective components.

Included in the package is the gear reducer assembly, with mounting hardware and input/output shafts. Not included are motors, couplings, or lubrication oils, which must be purchased separately. The unit requires periodic lubrication, and maintenance should follow manufacturer guidelines for gear oil type and change intervals. The gear reducer is covered by standard warranties, typically one year, provided proper care and installation procedures are followed.