How to Calculate Thread Rolling Penetration Rate on CJWinter Pneumatic Attachments

Over the course of our 60 years of providing thread rolling solutions CJWinter has fielded a number of questions about the process — including dies, attachments, and other related tooling.

One of the most common questions we receive is: “How should I calculate thread rolling penetration rate?”

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Enjoy Easier Thread Roll Ordering on CJWinter’s New Online Catalog

CJWinter’s premium selection of thread rolling products is now easier to access than ever before.

We are excited to announce the launch of our new online product catalog, filled with features that simplify the procurement of thread rolling tools and replacements for virtually any industry.

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Engineering Bulletin: Thread Gaging

All threaded fasteners, fittings and connectors must be measured using accurate gaging methods to ensure the highest quality.

Blank specifications vary on straight threads and tapered pipe threads. When rolling a straight thread, machine the part's blank diameter to the maximum pitch diameter - .002 inch. Roll the thread until the pitch diameter is within specification — between the pitch diameter's maximum and minimum — and adjust the blank diameter until the major diameter is within specification — between the major diameter's maximum and minimum.

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Engineering Bulletin: Blank Design

An incorrectly sized blank diameter can result in thread rolling issues like tapered threads, slivers and flakes, and off-size threads.

Blank design, therefore, is an important consideration in the thread rolling process to ensure parts are manufactured to the highest quality.

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5 Solutions to Common Thread Rolling Problems

Working in the thread rolling industry for over 60 years, CJWinter has seen its fair share of thread rolling problems of all types.  

Blank diameter, material type, and rate of penetration all play major roles in the performance of your thread rolling solution. Over the years, we identified the most common thread rolling issues and developed a series of solutions to address any challenge.

Of all the thread rolling problems we see on a regular basis, the following five represent the most common issues — and our recommended solutions to address them.  

1. Slivers / Flakes 

The appearance of slivers or flakes within threads can indicate a number of potentially problematic causes. First , check to see if rolls are mismatched, overfilled, or of the incorrect diameter. It’s possible that rolls need to be resynchronized or the blank diameter needs to be reduced to correct the problem.
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Missed the National Tech Conference?   Join CJWinter in Ohio

After recently presenting at the 2016 PMPA National Technical Conference, CJWinter will now head to northern Ohio to share thread rolling troubleshooting tips.

CJWinter will join PMPA's Northern Ohio Chapter on May 10, 2016, for an "All Things Threading" session in Brecksville, Ohio. 

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Engineering Bulletin: Extra Tooth Height Form

CJWinter designs a special tooth form that allows more material to be rolled into the root of the roll and a sharper crest on the part.

For US and Metric threads, this delivers additional adjustability between the major and pitch diameter specifications.

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Why Are More Manufacturers Choosing Thread Rolling?

More manufacturers in the automotive, fastener, plumbing, aerospace and other industries are choosing thread rolling over the traditional thread cutting process.

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New Website Offers Instant Data for Thread Rolling Solutions

CJWinter has pioneered the thread rolling sector throughout our 60 years in the industry. Today, we are proud to introduce our latest innovation: a brand new website with instant data and a streamlined ordering process.

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Engineering Bulletin: Use Easy Metal Flow Tooth Form to Eliminate Flaking

Learn how CJWinter's Easy Metal Flow Tooth Form eliminates flakes during the thread rolling process

Different materials have different forming characteristics during the thread rolling process. High sulfur, for example, can create flakes and slivers, thereby hindering the thread finish during cold forming.

The solution: Easy Metal Flow Tooth forms — a special form that concentrates forces at the root of the thread form, which helps plow material more efficiently during the cold form process. Ultimately, the increased and concentrated force minimizes, and in most cases eliminates, flakes from being produced when rolling brass, high sulfur, and other materials prone to flaking.

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