812391 Gear Reducer SK771.1Z 5.41:1, 210TC

The 812391 Gear Reducer by Blackmer, model SK771.1Z, is a high-quality gear reduction component designed for pump systems requiring precise speed control and torque enhancement.

Constructed with durable alloy steel gears and sealed housing for corrosion resistance, this gear reducer features a 5.41:1 reduction ratio and a 210TC motor frame interface standard. The housing measures approximately 12 inches in length, with a width of 6 inches and a height of 8 inches, and weighs approximately 15 pounds, making it suitable for installation in compact pump assemblies. Its input and output shafts are both 1.125 inches (28.6 mm) in diameter, with a keyway width of 0.25 inches (6.35 mm) to ensure secure coupling. The unit is designed for continuous duty in industrial environments, providing reliable, efficient power transmission for positive displacement and sliding vane pumps.

Key features include a precision-machined gear set with helical teeth for smooth operation, sealed bearings to prevent ingress of dust and moisture, and an oil bath lubrication system that requires periodic checking to maintain optimal performance. The reducer's standard mounting pattern facilitates straightforward installation onto compatible pump and motor assemblies, provided the proper alignment and coupling methods are used. The device is suitable for use in applications where accurate torque transmission, durability, and vibration reduction are necessary, particularly for pump systems operating within medium to high power ranges.

The 812391 Gear Reducer is suitable for use in chemical processing, water treatment, and industrial fluid transfer systems. It effectively reduces motor speed to match pump requirements, making it ideal for scenarios where precise control over pump operation is needed, and where budget considerations are essential without compromising reliability. Its compatibility with 210TC motors enhances versatility for various pump configurations.

The gear reducer ships with the housing, gears, bearings, and mounting hardware. It does not include the motor or coupling components, which must be purchased separately. To ensure longevity, routine maintenance includes checking and replenishing the lubrication oil, inspecting the seals, and verifying fastener tightness. The unit's sealed construction provides resistance to environmental contaminants, and it is warranted for parts and workmanship through Blackmer's standard warranty policies.