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Variable Speed Drives Hexadrive Series

Overview

1/3 through 3 HP Wide Variable Speed Belts

Hexadrive Series Typical V-Flat Drive Typical V-V Drive Hexadrive pulleys are the most durable variable speed pulleys available. The hexagon-shaped center shaft efficiently transmits torque through the six hex flats for maximum performance and long life. Internal drive keys, which tend to wear and shorten pulley life, are not required. In addition, because a resilient elastomer covers the shaft and eliminates metal to metal contact, no lubrication is necessary. The flanges are made of cast iron to provide a long- wearing belt contact area, and are precision-balanced for smooth operation.

Features

â–  Two styles available: one-side moveable for V-Flat drives and two-side moveable for V-V drives Uses variable speed belts â–  â–  Sizes range from 6 inches up to 12-1/2 inches in diameter â–  Maximum rating of 30 HP @ 1,750 RPM â–  Spring-loaded models have an easy removal feature. Hexadrive pulleys are available for adjustable center as well as fixed center drives. This is the ultimate product for applications in hostile environments. Some typical applications include: agricultural equipment, food packaging machines, air handling systems, textile spinning frames, foundry snag grinders, mixers, and pumps.

Belt Selection

Hexadrive pulleys offer optimum speed ratios because they are used with wide variable speed belts. The pulley flanges are designed to match standard belt angle and width, so each pulley model must be matched to the correct belt to insure full speed range and maximum torque capacity.

Adjustable Center Drives

An adjustable center drive system consists of a spring-loaded Hexadrive pulley, a fixed diameter companion sheave and bushing, an adjustable motor base, and a variable speed belt. Two types of drive packages are available— the V-V and the V-Flat drives. The V-V drive includes a two-side moveable Hexadrive pulley driving to a grooved companion sheave. The V-Flat drive utilizes a one-side moveable Hexadrive pulley driving to a flat-faced companion sheave. For a complete explanation of V-V and V-Flat drives, refer to page VSD-4, and to order bushings, see page SF-17. Generally, a V-V drive offers greater torque capacity, while a V-Flat drive is more compact and economical.
VSD

Fixed Center Drives

Fixed center, or compound, drives offer greater driven speed range in a compact space. There are three mechanically-adjustable Hexadrive pulley models available which, when combined with a spring-loaded Hexadrive pulley, provide drive packages ranging from 3/4 up to 30 horsepower. There is also a “non-Hex” adjustable pulley, the Model M-007, which can be teamed with a Hexadrive spring-loaded pulley for 1/2 and 3/4 HP motors. This package is unique because it is a two-side moveable fixed center drive.

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VSD-43