Browning 1027820 Single Groove Sheave 2.5in Od Cast Iron

Product Description

The BROWNING 1027820 is a finished bore single groove sheave designed for use in belt-drive power transmission systems. With a 2.5-inch outer diameter and a 0.5-inch finished bore, this cast iron sheave accepts standard 4L or A-type V-belts with a pitch diameter of 1.9 inches. The groove width measures 13/16 inches, and the overall length through bore is 1-1/16 inches. Cast iron construction provides the rigidity and wear resistance required in commercial and light industrial drive applications. Licensed HVAC techs, mechanical contractors, and millwrights typically encounter this component on belt-driven fan assemblies, blowers, and motor drives.

This sheave is suited for residential and light commercial belt-drive applications where compact, small-diameter pulleys are required. Common install scenarios include replacement of worn or damaged sheaves on belt-driven blower assemblies, fan decks, and auxiliary motor drives. The finished bore is ready to install on a 0.5-inch shaft without additional machining. The 13/16-inch groove width is dimensioned for standard 4L or A-section V-belts, making replacement belt sourcing straightforward in the field.

Key Features

• Finished 0.5-inch bore — installs directly onto a 0.5-inch shaft with no additional machining
• Single groove design accepts 4L or A-section V-belts
• 1.9-inch belt pitch diameter for accurate drive ratio calculations
• 13/16-inch groove width dimensioned for standard A or 4L belt cross-sections
• Cast iron construction for rigidity and durability in belt-drive service
• Compact 2.5-inch OD suitable for space-limited motor and blower configurations

Compatibility

Designed as an OEM-style replacement or aftermarket sheave for belt-driven blower and fan assemblies using 4L or A-section V-belts on a 0.5-inch shaft.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Disconnect and lock out power to the drive system before removing or installing any sheave. Ensure the bore fits the shaft within proper tolerance and secure the sheave with an appropriate set screw or bushing before reinstalling the belt. Check belt tension and sheave alignment after installation to prevent premature wear.