Dennis Cattell


The Minster Machine Co.
240 W. Fifth St.
Minster, OH 45865


Phone: 419-628-2331
www.minster.com
Contact via email

Stamping | Articles

Ask the Stamping Expert: Is it necessary to balance a die in a press?

May 31, 2016 | By Dennis Cattell

Q: I always try to balance my single-stage and progressive dies in our presses. However, with some new dies coming in, I have no room to move them in the press to a balanced condition. Is it necessary to balance a die in a press? A: To give you a better understanding of the subject, we should...

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Stamping | Articles

Ask the Stamping Expert: How can I increase press speed without constant production stoppage

May 31, 2016 | By Dennis Cattell

Dennis Cattell advises that the centerlines of the press, bolster, feed, straightener, and reel might not be in line and the coil material guide settings might not be correct.

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Stamping | Articles

Ask the Stamping Expert: How can I avoid die crashes?

May 31, 2016 | By Dennis Cattell

Q: I am a die setter and press operator who works with progressive dies that run up to 120 SPM. For die and press protection, we have: Strip material location with pilots. Pilot protection with limit switches. Four double-material-thickness stripper sensors in case of slug pull-up. Sensor on...

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Stamping | Articles

Ask the Stamping Expert: Do we really need die safety blocks for die setting?

May 27, 2016 | By Dennis Cattell

Dennis Cattell answers this question with a resounding "Yes!"

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Stamping | Articles

Ask the Stamping Expert: Do die repairs require full lockout/tagout?

April 18, 2016 | By Dennis Cattell

Editor’s Note: Regular readers of this column might recognize that Mr. Cattell answered a similar question in the May/June 2010 issue of STAMPING Journal®. Since this question reflects a common concern among stampers—and is asked of Mr. Cattell quite frequently in his work—we felt it would be beneficial to address the issue again.

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Stamping | Articles

Ask the Stamping Expert: How can I get a die to run in two different presses?

April 11, 2016 | By Dennis Cattell

Q: When I move a die from one press to another, the die runs fine in the first press but will not run in the second press. The presses are the same size, stroke, and speed range, although one is a few years older than the other. What can I do to ensure the die runs in both presses. A: There are...

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Stamping | Articles

Ask the Stamping Expert: Is there a check list for setting progressive dies?

April 1, 2016 | By Dennis Cattell

Q: We are new to die setting. Do you have a check list that could help us with different progressive dies? Can you recommend any literature on the subject? A: First, I do not know of any comprehensive literature. Most literature tends to focus on an individual subject rather than cover the overall...

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Stamping | Articles

Ask the Stamping Expert: How can I reduce snap-through condition effects?

March 31, 2016 | By Dennis Cattell

In the May/June 2012 “Ask the Expert” column, you discussed the causes of the large vibrational energy wave that must be dissipated by the press structure beyond the shear loads. Is there any way to reduce the vibration? A: Many lamination and blanking dies incorporate moveable stripper...

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Stamping | Articles

Ask the Stamping Expert: Why do press and die problems occur at lower-than-capacity press speeds?

March 31, 2016 | By Dennis Cattell

Q: To improve efficiency and reduce cost in our newly acquired high-speed blanking operation, we have increased press speeds from 225 SPM to 450 SPM. After several successful months, we are experiencing a high number of new press and die problems. The presses are capable of speeds higher than 500...

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Stamping | Articles

How do I calculate tonnage in progressive stamping?

January 27, 2009 | By Dennis Cattell

This article the complete STAMPING Journal® Ask the Expert column, as answered by columnist Dennis Cattell of The Minster Machine Co., and published in the Jan/Feb 2009 issue:

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Mechanical press diagram

Stamping | Articles

Stamping 101: Anatomy of a Mechanical Press

January 15, 2008 | By Dennis Cattell

Stamped components are made by forming, drawing, trimming, blanking, or piercing metal—in sheet or coil form—between two halves (upper and lower) of a press tool, called a die. The upper member (or members) are attached to slide (or slides) of the press, and the lower member is clamped or bolted to the bed or bolster. The die is designed to create the shape and size of a component. The two halves of the die are brought together in the press. Both force (load) and accuracy are required to achieve the repeatability and tolerance demands.

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