Workholding Chuck has drawbar activated design.

Press Release Summary:




Along with centered pilot for optimized accuracy and repeatability, 4 in. dia drawbar-actuated, pull-down chuck features spring-loaded funnel-shaped base that goes into chuck body with zero clearance sliding fit. Operator pushes part down into funnel, and 2 spring-loaded ball plungers hold part in place. Precision centering power air and diaphragm chucks are available for lathe and milling operations. Accuracies of 0.001-0.00001 in. are guaranteed.



Original Press Release:



Specialty Drawbar Activated Workholding Chuck



Northfield Precision Instrument Corporation is a leader in the design and manufacture of precision workholding air and diaphragm chucks. Northfield manufactures precision air chucks with a guarantee of accuracy within millionths. We have come to be the precision workholding source for air and diaphragm chucks with workholding leadership in accuracy, reliability, repeatability, concentricity, productivity and customer service. Northfield introduces an enhanced chuck with centered pilot for outstanding accuracy and repeatability.

o Northfield 4" diameter pull down chuck is engineered to help customers solve tough workholding problems. When a special chuck was needed to hold an unusually shaped automotive part, Northfield was asked for ideas. The machining operation was basic, hard turn a straight bore that is case-hardened to 85/63 rockwell "C". The complicating factor was the shape of the part; it was not round or concentric. The straight bore must be machined concentric to a cone-shaped hub and perpendicular to a larger offset rectangular flange. Chief engineer Paul DeFeo realized that the most accurate way to hold the part was to grip it by the cone and bank off the flange. The solution was to design a special drawbar-actuated, pill-down chuck with a spring-loaded funnel-shaped base that was a female version of the cone shape on the part. This base fits into the chuck body with a zero clearance sliding fit. The operator pushes the part down into the funnel, two spring-loaded ball plungers hold the part in place. Precision centering power air and diaphragm chucks are available for lathe and milling operations.

Northfield Precision designs and manufactures the world's most accurate workholding precision pneumatic Air and Diaphragm Chucks for any lathe, boring machine or grinder or VMC. Available in SAE or metric, in chuck sizes from 3" (76mm) to 18" (457mm). Accuracies of 0.001" to 0.00001" (0.254m) guaranteed.

We have come to be the Precision Workholding Source for air & diaphragm chucks with workholding leadership in accuracy, reliability, repeatability, concentricity, productivity and customer service. Quick change, thru-hole and coolant-thru chucks are available with engineered workholding consultation services for all your OEM applications. One competitive price for complete workholding system including chuck, top jaws, custom made air tube assembly, rotary joint, hoses, operating valve and accessory kit. No hidden extras.

Custom workholding chucks and jaws are available and FREE engineering and technical assistance is offered. Contact Northfield Precision Instrument Corp., 4400 Austin Blvd., P. O. Box 550, Island Park, NY 11558-0550. Call Toll Free 1-800-810-2482 - Fax(516) 431-1928; or visit our website at www.northfield.com.

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