Our 98% acceptance rate in quality and delivery is exhibited by multiple awards and recognitions by our customers as star supplier and preferred vendor.
Parts manufactured at our facility include those used in aircraft, torpedoes, fuel pumps, and smoldering guns to burner systems. We also manufacture such items as retention knobs (pull studs / retention studs), specialized washers, brake parts for aircraft, navy nuclear, and assemblies for the machine tool industry. Read more about our products.
Product Categories of
J & M Machine, Inc.
Balancing Machines
Data Collection Devices for Gaging, SPC, etc.
Drills
Gundrills
Inserts, Indexable (Carbide, etc.) & Tool Inserts
Retension Knobs
Tool Holders & Adapters
Trade Names
Taper Shank Test Fixture
The Survivor
As seen in MMS
The Knob Problem
The retention knob is an unmistakably critical component of the machining process. However, the tightening of the knob itself can lead to the toolholder not seating securely in the machine. You may be losing tool life to knob tightness without even knowing it.
This footage illustrates how the toolholder taper is measured in a test designed to capture the retention knob’s effect on the shape of the toolholder taper.