Product Overview

Dial in belt speed on fractional horsepower equipment with this U.S.-made variable speed pulley from Chicago Die Cast. Precision high‑pressure zinc die casting provides strength and balance, while the adjustable sheave design lets you fine‑tune belt position to vary the drive ratio for your application. Sized at 3‑3/4" outside diameter with a 1/2" bore, this variable speed pulley is built for small electric motors and light machinery where smooth, reliable speed control is needed. No keyway.

3-3/4" OD × 1/2" bore variable speed (variable pitch) pulley
High‑pressure zinc die casting for durability and balance
Adjusts belt ride height to fine‑tune output speed
Intended for fractional HP electric motors
No keyway; made in the USA

Key Features

Variable Speed/Pitch: Adjust sheave spacing to change effective pulley diameter and output speed
Durable Construction: High‑pressure zinc die‑cast body
Fractional HP Use: Ideal for small motors and light machinery
No Keyway: Plain bore design (verify your hub retention method/set screws)
Made in USA: Consistent quality and performance

Specifications

Brand: Chicago Die Cast
Model/Mfr#: 375VP5
Type: Variable speed (variable pitch) pulley
Outside Diameter (OD): 3-3/4 in
Bore Diameter: 1/2 in
Material: Zinc die cast
Motor Class: Fractional horsepower
Keyway: None (plain bore)
Country of Origin: USA

Compatibility & Applications

For fractional HP electric motors on light machines, fans, blowers, small tools, and shop equipment.
Belt Type: Verify belt section compatibility and width with your equipment/belt manufacturer before use.
Shaft Fit: 1/2" round shaft; no keyway. Confirm retention method (e.g., set screws, collar) on your application.