Browning 1033281 Two Groove Cast Iron Sheave 3.55 in Od

Product Description

The BROWNING 1033281 is a finished bore, two-groove cast iron sheave designed for V-belt drive applications in HVAC, industrial, and mechanical power transmission systems. It features a 3.55-inch outer diameter and a 5/8-inch finished bore, ready to mount without additional machining. The belt pitch diameter measures 2.8 inches for 4L or A-type belts, and the overall length through the bore is 1-31/32 inches. Weighing 2.92 pounds, this sheave is built for durability in belt-driven fan, blower, and pump assemblies. HVAC technicians and mechanical contractors install this component when replacing or upgrading sheaves on motor or driven-shaft ends in multi-belt drive setups.

This sheave is suited for residential and light commercial belt-drive systems where 4L or A-series V-belts are used. Common applications include air handling units, belt-drive blowers, exhaust fans, and pump drives that require a two-groove pulley configuration. The finished bore and standard dimensions make it a direct-fit replacement in many existing drive assemblies without the need for custom boring or bushing modification.

Key Features

• Two-groove design accommodates dual 4L or A-type V-belts for increased power transmission capacity
• Finished bore at 5/8 inch — no additional machining required at installation
• Cast iron construction provides wear resistance and dimensional stability under load
• 3.55-inch outer diameter with 2.8-inch belt pitch diameter for accurate belt sizing
• Overall bore length of 1-31/32 inches suits standard shaft configurations
• Compact weight of 2.92 pounds simplifies handling during overhead or confined-space installs

Compatibility

Designed as an OEM-style replacement two-groove sheave for belt-drive systems using 4L or A-series V-belts with a 5/8-inch shaft diameter.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Always de-energize and lock out the motor before removing or installing sheaves. Ensure the shaft is clean and free of burrs before sliding the sheave into position, and verify belt alignment and tension per the belt manufacturer's guidelines after mounting. Consult applicable mechanical and electrical codes for drive system service requirements in your jurisdiction.