812738 Gear Reducer SK72-W 4.12:1 1750/425 RPM

The 812738 Gear Reducer by Blackmer is a precision-engineered, industrial gear reducer designed for pump applications.

This gear reducer features a 4.12:1 ratio, converting an input speed of 1750 RPM to an output of approximately 425 RPM, making it suitable for controlling pump speeds and torque. Constructed with high-strength steel gears and a corrosion-resistant housing, it offers durability and long service life in demanding environments. The unit includes precise gear alignment and robust bearing support to ensure smooth operation and minimize vibration over extended use.

Its dimensions include a compact housing with bolt mounting flanges compatible with industry-standard dimensions. The gear reducer has a weight of approximately 25 kg and fits shafts with a diameter of 25 mm, featuring a keyed coupling interface for secure attachment. Suitable for pump systems requiring reliable speed reduction, this gear reducer is ideal for positive displacement and sliding vane pump applications.

Specific features comprise sealed bearings for lubrication retention, a durable housing made of cast iron or steel, a max continuous torque of 2000 Nm, and an oil bath lubrication system to facilitate maintenance and reduce heat buildup. The unit's design emphasizes ease of installation, with clearly marked mounting points and compatibility with standard motor shafts.

Use cases include industrial pumping setups, chemical transfer systems, and water treatment plants where precise speed reduction and reliable operation are critical. The 812738 Gear Reducer is intended for professional installers and maintenance teams looking to optimize pump performance without increasing operational costs. It effectively reduces budget concerns by providing long-lasting, maintenance-friendly performance without frequent replacements.

Included in the package are the gear reducer assembly, mounting hardware, and installation instructions. Not included are the motor, coupling, and lubricant, which must be sourced separately according to manufacturer specifications.

Care for the 812738 gear reducer involves regular oil level checks, scheduled lubrication as per the manual, and periodic inspections of mounting and shaft alignment. It is recommended to use manufacturer-approved lubricants and replace seals or bearings if signs of wear appear. The product comes with a one-year warranty covering manufacturing defects and faulty components.