CJWinter Wins PMPA’s Technical Member Participation Award

At CJWinter, we’re proud to be part of a vibrant manufacturing community — and we’re equally proud to maintain active membership in various industry associations. From the American Petroleum Institute (API) to the Business Council of New York State, Inc., we hold memberships across a range of prominent groups.

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Live From PMTS 2017: Metalforming Solutions from CJWinter

CJWinter releases new content on metalforming solutions for all major machine types. 

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PMTS 2017: Get First Look at New CJWinter and Davenport Tools

Thread rolling and screw machine experts CJWinter and Davenport Machine Tool Company will once again showcase at this year’s Precision Machining Technology Show (PMTS 2017). 

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Eco Brass: Thread Rolling for Lead-Free Alloy Now Available

Thread rolling hard materials isn’t always impossible.

Because hardened metals don’t flow easily to fill die threads, they often require a thread cutting process to manufacture.

There’s also the risk of breakage — some materials, especially aerospace metals, are simply too brittle to be thread rolled.

Typically, 150 kilopounds per square inch is the cutoff for thread rolling. These materials are just too strong. However, new alloys are changing the way thread rolling works.

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Avoid Flaking and Damage When Thread Rolling Thin-Walled Parts

When thread rolling screws and fasteners, it’s important to maintain minimum wall thickness.

This can be a challenging task, particularly when designing and manufacturing thin-walled parts, including bolts and screws, that require thread rolling.

If your design includes walls that are thin, thread rolling parts can become problematic during production, as distortion can occur. Distortion not only causes flaking and non-uniform thread geometry on a completed part, but it can also lead to the tearing or collapse of a part’s threaded portion during the thread rolling process.

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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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