CDRG Threading Machine (Roll Threading Machine)

Introduction – CDRG Threading Machine (Roll Threading Machine)

A CDRG Threading Machine—also known as a Roll Threading Machine—cold forms external threads on bolts, studs, rebar and special fasteners using a matched pair of profiled CDRG rollers. Unlike cutting, roll threading plastically displaces material to generate precise, high-strength threads with excellent surface finish and repeatability. Built for continuous-duty production, our machines enable tight pitch control, stable flank geometry and superior throughput for automotive, construction, energy and general engineering industries.

Working Principle & Process Flow

During operation, the workpiece blank is positioned between two synchronized CDRG rollers. Under calibrated pressure and feed, the blank is cold formed so metal flows into the roller grooves, creating the thread profile. The result is work-hardened threads with higher tensile and fatigue strength versus cut threads. Typical process: material prep ? blank chamfering & straightness check ? machine setup (center distance, axial alignment, pressure) ? roll threading with coolant/lubricant ? in-process gauging (PD, lead, flank) ? final inspection & packing.

Applications & Benefits

Key Features

Where to Buy in India

Searching for a reliable CDRG Threading Machine (Roll Threading Machine) that delivers accurate threads, high throughput and reduced downtime? Leo Industries supplies application-engineered roll threading solutions—machine, roller sets and setup support—tailored to your thread form, material and production targets, with quick delivery and technical assistance across India.

Maintenance & Safety Tips

FAQs — CDRG Threading Machine (Roll Threading Machine)

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