Browning 1033638 Two Groove Sheave 1-1/8 Bore 4.95 Od

Product Description

The BROWNING 1033638 is a finished bore two groove sheave designed for V-belt drive systems in HVAC, industrial, and mechanical equipment applications. Built from cast iron, this sheave features a 1-1/8 inch finished bore and a 4.95 inch outer diameter, making it a direct-mount option that requires no secondary boring or machining. The belt pitch diameter measures 4.6 inches, and the pitch diameter for 4L or A-type belts is 4.2 inches. The overall length through the bore is 1-15/32 inches. HVAC technicians and mechanical contractors install this type of sheave on blower and fan assemblies where precise belt alignment and consistent drive ratios are critical.

This two groove sheave is suited for residential and light commercial air handling units, belt-driven blowers, and similar rotating equipment where dual V-belt configurations are used. It accommodates standard B-section and A-section V-belts. The finished bore design means the part is ready for installation onto standard keyed or set-screw shafting without additional machining. It is commonly installed on motor shafts or driven equipment shafts in forced-air HVAC systems and ventilation equipment.

Key Features

• Finished 1-1/8 inch bore — no additional machining required
• Two groove configuration supports dual V-belt drive setups
• Cast iron construction for durability and dimensional stability under load
• Compatible with 4L and A-type V-belts with a 4.2 inch pitch diameter
• B-section belt pitch diameter of 4.6 inches
• Overall bore length of 1-15/32 inches suits standard shaft lengths

Compatibility

Designed as an OEM-style replacement or direct-install two groove V-belt sheave for belt-driven blower and fan assemblies using standard A-section or B-section V-belts on 1-1/8 inch shafting.

Installation Notes

Installation should be performed by a qualified HVAC technician or mechanical contractor. Always disconnect and lock out power to the equipment before removing or installing sheaves. Ensure the shaft is clean and free of burrs before sliding the sheave into position, and verify proper belt tension and alignment before returning the system to service. Consult applicable mechanical and HVAC codes for drive system service requirements.