JM Performance Products, Inc.

1234 High Street

Fairport Harbor, OH 44077 US


As Seen In Modern Machine Shop

side by side spindle comparison

Overcoming Toolholder Deformation with High-Torque Retention Knobs
At Hansen Engineering Co., toolholder expansion reduced spindle contact, causing a variety of production issues. High-torque retention knobs from JM Performance Products increased productivity and reduced downtime.

JM Performance Products knobs

Retention Knobs Prevent Toolholder Distortion
JM Performance Products will feature its high-torque retention knobs, which are designed to prevent toolholder distortion.

Retention Knobs Prevent Toolholder Distortion
Manufactured from 9310 steel, JM Performance Products’ high-torque, high-strength knobs are said to be 40-percent stronger than standard knobs.

High-Torque Retention Knobs Constructed of High-Strength Steel
JM Performance Products offers high-torque retention knobs in high-strength 9310 steel. 

Retention knob high-torque design

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.

Test fixture

Video: Retention Knob Tightening And Toolholder Deflection
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.

Product Categories of JM Performance Products, Inc.

Data Collection Devices for Gaging, SPC, etc.
Gages - Digital
Milling Machines, Universal
Retention Knobs
Tool Conditioning Equipment
Tooling Systems, Modular and/or Quick-Change
Training of All Types, Including Audiovisual/Internet

Trade Names

ClampForce Drawbar Gage
High Torque Retention Knob
Taper Shank Test Fixture