Overview
Pratt Burnerd is a leading manufacturer of chucks and chucking systems, offering a range of products designed for precision and durability. Their products are widely used in various high-speed applications and grinding operations.

4 Jaw Independent Chucks
These chucks are precision manufactured with a high-strength nodular iron body. They feature a unique jaw and jaw-way design that enhances the chuck's life and rigidity. The chucks come with hardened operating screws and solid reversible hard jaws. They are easy to mount with front mounting holes and are compatible with a wide range of adaptor plates for common spindle noses.

Super Precision Chucks
Ideal for high-speed applications, these chucks are made from high-strength nodular iron with hardened and ground jaw strips. They exceed ISO 3089: 1991 (E) Class I standards and are suitable for use on manual lathes.

3 Jaw Griptru Chucks
These chucks allow for re-alignment of the front body to increase accuracy within 0.005mm. They are often used in grinding operations and can grip subsequent workpieces within 0.013mm accuracy. They also exceed ISO 3089: 1991 (E) Class I standards.

Standard Accuracy Chucks
These chucks serve as an economical alternative to Super Precision chucks, suitable for older lathes where high speed and super accuracy are less critical. They meet ISO 3089: 1991 (E) Class II standards.

6 Jaw Griptru Chucks
Designed to reduce distortion in thin-walled components, these chucks spread gripping force evenly, improving finish in grinding operations. They offer increased accuracy and can be used as normal chucks by centering the front body.

Specifications and Adaptors
The document provides detailed specifications for various chuck models, including dimensions, weight, capacity, and maximum speed. It also lists available adaptors for different chuck sizes and spindle nose types.

Note
Illustrations and specifications are subject to change without notice, and additional adaptor types are available upon request.