Trapezoidal Lead Screw and nuts are power transmission […]
Trapezoidal Lead Screw and nuts are power transmission screw threads similar to the Acme series but made to metric dimensions and standards. One such standard is the German Metrisches ISO-Trapezgewinde DIN 103 which has been adopted by the International Organization for Standards (ISO). Sometimes misnamed “metric Acme” or “metric M series Acme” Trapezoidal lead screws look like Acme screws and have the same stout thread form and the same robust and durable features as the Acme series.
Trapezoidal single start thread designations are the letters “TR” followed by the Major Diameter in mm and then the pitch in mm separated by an “X”. Thus, a “TR 14 x 3” Trapezoidal thread has a major diameter of 14 mm and a pitch of 3 mm. The separator “X” is commonly enunciated as “by” so one would communicate this size verbally as “Trapezoidal fourteen by three”.
Roton’s rolled thread Trapezoidal screws and high performance Trapezoidal nuts are combined to provide the optimum performance available in this type of power screw. The highly burnished surface finish of the screw and low friction bronze and plastic nuts yield a smoother, less abrasive action than conventional cut Trapezoidal screws. Improved wear and surface properties insure users a longer service life and quieter operation, requiring less power in a wide variety of applications.
All Trapezoidal lead screws, 44 mm in diameter and larger, are made of special quality medium carbon steel. Screws smaller than 44 mm are made from special quality low carbon steel. Alternate screw materials are 304 type stainless steel, alloy steels, high machinability grades of carbon steel and aluminum alloys.
Trapezoidal lead screws are cold formed using a unique, highly accurate thread rolling process which guarantees a smooth, high quality thread. Roton’s thread rolling process eliminates the interrupted grain flow of conventional cut threads, thereby increasing yield, ultimate, and fatigue strengths.