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Micro Tool Company, Inc.    284 Brodhead Road   Bethlehem, PA  18017    610.882.3740  fax  610.882.3776

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SEMI-AUTOMATIC SHOTGUN BOLT HEAD PRODUCED BY MICRO TOOL COMPANY

With over 50 years of experience, our extensive knowledge of modern CNC Swiss Machining and special processes gives us a competitive advantage.  This project required us to precisely control the geometry and tolerance of this critical firearm component to allow for multiple post machining special processes which all affect the finished part size.   These included austemper heat treating, shot-peening, and an electroless Nickel/Teflon final coating.   Even with these three post machining processes we were still able to demonstrate a Process Capability (Cpk) of better than 1.33

Semi-Automatic Shotgun Bolt Head

Product Description

Bolt Head for a Semi-Automatic Shotgun

Processes/Capabilities Applied

CNC Swiss Turning, drilling, boring, milling, heat treating, shot peening, nickel/teflon coating

Equipment Used to Manufacture Part

32mm CNC Swiss-Turn machine tool

Part Dimensions

1.070" OD x 1.410" long

Tightest Tolerances

+-.0005"

Material Used

AISI 4340 Alloy Steel

Surface Finish Requirements

32 micro inch RA

Special Processes

Austemper Heat Treat, Shot-Peening, Nickel/Teflon coating

Production Run Volume

6000pcs

Notes of Interest

Demonstrated Process Capability of better than 1.33 Cpk
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