North American Tool has a long-standing commitment to quality and service in the production of special taps and popular
special taps. Since 1986, the company has offered a complete line of made-to-order industrial, metal-cutting taps
referred to as special taps.
What makes special taps special?
Basically, a special tap is a cutting tool that cuts internal threads and is manufactured with specifications that vary from ANSI standards (American National Standards Institute) - in diameter, thread combinations and/or blank dimensions. Blank dimensions refer to the steel cylindrical blank from which a tap is manufactured. The manufacture of special taps may also vary from (U.S. or ANSI) standard tap design criteria as it regards thread form and geometry, number of pitches or threads per inch, or any number of design variables -- from left-hand taps to piloted taps...from interrupted thread taps to special shank and drive dimensions. In addition, taps manufactured to METRIC DIN or ISO (International Organization of Standards) dimensions are usually considered special taps.
Another factor would be the material from which a tap is manufactured. A standard tap would typically be manufactured using H.S.S. or high speed steel. However, a special tap may be manufactured from any number of materials best suited to the tapping application at hand, such as carbide, particle metal steel (PM), or HSS-E (high speed steel ‘exotic'), with a higher concentration of premium steel alloy such as cobalt or vanadium to add strength to H.S.S.. The taps may also be coated with various tool coatings that would significantly increase the tool‘s hardness and wearability.
Manufacturing engineers will often specify special thread forms or thread tool designs to meet their design criteria, depending on the product being manufactured. North American Tool can manufacture special taps designed to precisely meet these customer requirements.
North American Tool offers the following types of Special Taps (but is not limited to the following list):