![]() ![]() This ensures high-quality marks on all parts, including those with flanges that vary by up to 0.25 inch, curvatures that exceed 10 percent and inconsistently shaped couplings. The machine uses the D2D, or diameter-to-diameter, method to produce even marking pressure on round diameter parts. Martin says that this method is recommended for applications where the marking surface is delicate or might be damaged by the pressure applied with a typical impact marking press.Ī train-bearing manufacturer recently installed Columbia’s all-electric Model 960 servo-driven roll marking machine to imprint part and serial numbers, a date code and the phrase “Made in the USA” on its wheel bearings. Pressure applied by the marking machine to the die face leaves a permanent impression on the metal surface. Roll marking, a variation of hand stamping, involves rolling a round die over a flat metal part, or rolling a round part past a flat die. The exact-fit stamps were inserted into existing sheet metal dies that cut the burner bases. The two-part stamps reconfigured the lettering of the words off, high and low and produced a lightning bolt graphic and company logo. created separate custom embossing stamps for Sunbeam Products’ GrillMaster and Coleman production lines. Larger stamps are used to mark consumer products like outdoor grills. Small hand stamps are often used to mark stainless steel knives, notes Matt Martin, director of sales and marketing at Durable Technologies. Complex dies can even automatically advance digits to create consecutive serial numbers. Metal stamps come in all shapes and sizes and are easily customizable with nearly any text, logo, or symbol. It can be directly struck with a hammer, placed in a hand holder to ensure even indentation, or mounted in a press. The hand stamp is just a rectangular piece of metal with one or more characters engraved on one end. In fact, some automotive manufacturers still hand stamp their logos on engines and other proprietary parts.” “Nonetheless, it is often used by quality control people to mark parts that have passed final inspection. “Hand stamping metal parts remains a cost-effective and permanent marking method, but it is labor intensive,” notes Krembel. After the man removed the stamp, an indented Roman numeral VII was revealed to be part of the logo of the show’s producer, Mark VII Limited. The demo involved a man using a hammer to strike a stamp twice against a sheet of metal. It also gave them a quick demonstration of manual metal stamping after each episode. The weekly Dragnet television show of the 1960s did more than just entertain its viewers. ![]() ![]() Equally important factors include the application requirements, environmental factors (such as moisture or chemical exposure), budget and production demands. The type of metal being marked often dictates which method is best. Manual stamping, impact machines, chemical etching, ink-jet printing and lasers also produce quality markings on steel, stainless steel, aluminum, titanium, brass and copper. Dot-peening and scribing are two of several methods available to manufacturers for marking metal parts. ![]()
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