Thread Rolling is Superior

Thread rolling is widely accepted as the fastest and preferred method of economically producing uniform smooth, precise threads of superior physical qualities.

This process is also capable of performing non-threading operations such as burnishing, knurling and rolling of helical and annular grooves of various forms.

Thread rolling utilizes hardened steel rolls to produce external threads. The working surfaces of the rolls have a thread form which is the reverse of the thread to be produced. In penetrating the surface of the blank, the rolls displace material to form the thread roots, and force the displaced material radically outward to form the thread crests.

Material Savings

The diameter of the blank is between the major and minor diameters of the threads and varies with the material, type of thread and thread specifications.

Approximate Percentage of Material Saved by Thread Rolling vs. Cut Threading

Strength

Cold working of metal during thread rolling improves thread form physical characteristics and mechanical properties. When thread is rolled, the structure is deformed and the surface is hardened. Increased surface hardness results in thread form properties that are superior to those of the original material.

The above diagram shows how grain structure is maintained with rolled threads, in continuous unbroken lines following contours, increasing tensile and shear strength.

Improved Finish

The smooth flanks of rolled threads provide better surface contact with mating threads. The burnished roots and flanks are free from chatter, tearing or cutter marks that can serve as a focal point or stress and starting point for fatigue failures.

Accuracy

Rolled threads maintain consistently closer tolerances and uniformity than cut thread. Thread rolling is unique in its ability to maintain accuracy of the original set up during long runs of high-speed production. Dies do not change appreciably during the life of the rolls. They do not wear like other types of threading tools.

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Keystone Threaded Products
P.O. Box 31059 • Cleveland, Ohio 44131
e-mail: keystone@keystonethreaded.com
800-862-2263 • Tel: 216-524-9626 • Fax: 216-524-7132

Keystone Threaded Products provides a broad line of threaded rod, acme rod threaded, acme screw, acme threads screw, worm gears, acme lead screw, acme threads, roll forming, thread rolling, linear motion, screw jacks, jack screws, threaded rods and threaded studs. B7 threaded rod, alloy threaded rod, alloy threaded bars, Acme, Acme Screws, Rods, Bars, Stub,Acme Threaded Bars, Acme Threaded Rods, Actuators, Mechanical, Electrically Operated, Bars, Bolts, Double End, Roll Thread, Special, Stud, Continuous Thread, Fastener,
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