Since the company’s incorporation in 1956, the team at CJWinter developed a reputation for the fast and efficient production of thread rolled products. Our top priority is giving customers a competitive advantage, which we do by leveraging experienced engineers, superior customer support, and online resources.
An Introduction to Thread Rolling
Thread rolling is a cold forming or cold metal forming process that creates threads using precision thread rolling dies that are the mirror image of the thread being produced. This process is different from other processes like metal cutting, grinding, and chasing because it does not remove any metal to create the desired profile. Instead, these hardened steel thread rolls move and mold ductile metals quickly and very precisely into desired thread form.
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.
CJWinter releases new content on metalforming solutions for all major machine types.
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).
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.
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.
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?”
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.
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.