Browning 1027853 Single Groove Sheave 2.5in Od 7/8in Bore

Product Description

The BROWNING 1027853 is a finished bore single groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical power transmission applications. Manufactured from cast iron, this sheave features a 2.5-inch outer diameter and a pre-finished 0.875-inch bore, eliminating the need for additional machining before installation. With a belt pitch diameter of 1.9 inches for 4L or A-type belts and an overall bore length of 1.0625 inches, the 1027853 is a compact, ready-to-mount drive component suited for blower assemblies, fan drives, and other belt-driven equipment. Licensed HVAC technicians and mechanical contractors typically install this component during motor or blower drive maintenance.

This sheave is intended for use with 4L or A-type V-belts in single-groove drive configurations. Common applications include residential and light commercial air handler blower drives, exhaust fan assemblies, and small motor-driven equipment where a compact 2.5-inch OD sheave is required. The finished bore is sized at 0.875 inches, making it a direct drop-in for shafts of that diameter without additional boring or keying work beyond standard setscrew installation.

Key Features

• Finished 0.875-inch bore — no additional machining required
• Cast iron construction for durability in belt-drive service
• Single groove profile accepts 4L or A-type V-belts
• 2.5-inch outer diameter suits compact blower and fan drive assemblies
• 1.9-inch pitch diameter for accurate belt speed ratio calculations
• Groove width of 0.8125 inches provides proper belt seating

Compatibility

Designed as an OEM-style replacement or service sheave for single-groove V-belt drive systems using 4L or A-type belts on 0.875-inch diameter shafts.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out all power to the motor and driven equipment before removing or installing any sheave. Align the sheave properly with the mating pulley using a straightedge before tightening setscrews to avoid premature belt and bearing wear. Verify belt tension and alignment after installation per standard drive system practices.