• Pratt Burnerd America

Pratt Burnerd America is in the business of supplying quality Workholding products throughout North America. Based in Kalamazoo, MI they are equipped with a full service shop to repair, rebuild and perform manufacturing and warehousing.
Pratt Burnerd America also markets Workholding products labeled Atlas Workholding. Atlas Workholding is Workholding products sourced from around the world, including the USA, and are built to our specifications for the North American market.  Combined they have one of the largest varieties of Workholding products in the world, with Power Chucks, Manual Chucks, Collet Chucks, Collets, Special Chucks, Rotating Cylinders, and Workholding Accessories.
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Pratt Burnerd America Logo PMI CNC Tooling Automation
Lathe Chucks & Accessories

​3977 Emerald Drive
Kalamazoo, MI 49001
Tel: 800.253.0820

Atlas Air Powered Front Mount Pull Back QUICK CHANGE Collet Chucks

This unit accepts any competitors quick change collets and easily converts any lathe or grinder into a production machine with the ​42BZI & 65BZI collet chuck
  • No Hydraulic System Required
  • No Draw Tube or Air Feed Tubes Restricting Spindle Bore
  • No Rear Cylinders and Cylinder Adapters
  • Ideal for Rotary Table Applications
  • Easy Change from Collet Chuck to Standard Chuck
  • High Speed 2500 RPM
  • High Accuracy Less Than .001” TIR
  • Pull Back Design

Atlas Stationary Dead Length Collet Chucks

The ATL225-5C can be used for Pallets, Tombstones, Machining Centers, Standard Mills and Drill Presses.
  • Powered by Air and/or Hydraulics
  • Small Footprint
  • Low Cost & Easily to Install
  • Repeatability Plus Minus .0015″
  • Dead Length Design
  • Lever or Foot Pedal Actuated
  • Low Maintenance with Oil Mist Lubrication System

Constant Grip Quick-Change and Non-Quick Change VTL Power Chucks

These closed center power chucks with chip ejecting discharge chutes in the chuck body face for reducing chip build-up to near zero, is designed for use on Vertical Turning Lathes.
  • ±.0005″ Repeatability
  • 3-Point Adjusting Feature in the chuck body permits indicating in to zero. Increase Soft Jaw Life by using adjustment feature. Reduce or eliminate re-boring of Soft Jaws.
  • High RPM … up to 5,000 using standard top jaws … without loss of gripping force, due to internally counter-balanced design.
  • Quick Change Master Jaws, 2 sets supplied with each chuck permits offline pre-assembly of top tooling for next job reducing traditional setup time by 95%.
  • SAFE Visual Indicator shows when Master Jaws are in the unlocked mode.
  • Utilize existing top tooling by selecting style of master jaws from 1.5 x 60, 1/16 x 90, Am. Std. Acme, Am. Std Tongue & Groove and Square Serrations or substitute mono block jaws. Sets can be mixed styles.
  • Doubles as collet chuck as master jaws have keyed radius in front that accept standard W & S collet pads. Eliminate time wasted on switching over to collet chuck
  • Utilize the machine’s existing actuating cylinder – including Japanese types
  • Easy Installation – removable blank sleeve in the chuck allows the customer to bore and thread the sleeve of the chuck to match existing drawtube of drawbar. PBA can supply chuck sleeve prethreaded on request, at a nominal charge
  • Optional Jaw Setting Fixture (as shown) for presetting top jaws off the machine for the next job, while the machine is still running. A real timesaver!
  • Sizes 6″, 8″, 10″, 12″, 15″, 18″, 20″, and 24″ diameters.. Jaw Presetting Fixture Order Number 1009-07090 for use with 6″, 8″, 10″, 12″, 15″, 18″ and 20″ sizes Standard Bore and King Bore Models Quick Change Jaw Power Chucks.
17 May 2023