A-A-51167A
3. SALIENT CHARACTERISTICS
3.1 General requirements. The cutting heads of type I rotary files shall meet the minimum requirements for standard high-speed steel described in the annex of ASTM A600 - 92a when tested in accordance with ASTM A370. The cutting heads of type II rotary files shall be manufactured from tungsten carbide with a hardness of not less than 91.2 and not greater than
92.5 on the Rockwell "A" scale when tested in accordance with ASTM B294. The cutting heads of type II rotary files shall have a density of 14.6 to 15.1 grams per cubic centimeter when tested in accordance with ASTM B311. Type II rotary files shall have a transverse rupture strength of 220,000 pounds per square inch when tested in accordance with ASTM B406.
3.2 Fluting. The fluting of the rotary file shall be either right-hand spiral, right-hand spiral with chipbreaker, double cut, diamond cut, or straight cut, depending upon the style specified. The style A rotary files shall have right-hand spiral fluting consisting of a right hand helix.
The helix angle measured from the centerline of the cutter head shall be between 15 and 35 . Style B rotary files shall have right-hand spiral fluting with a left-handed spiral chipbreaker along the periphery of the cutting teeth. Style C rotary files shall have double cut fluting consisting of a series of left-hand spirals in conjunction with right-hand spirals that result in a wedge or chisel form cutting tooth. The number of left-hand spirals shall be from 40 to 60 percent of the number of right-hand spirals. Style D rotary files shall have diamond cut fluting consisting of a series of left-hand spirals in conjunction with right-hand spirals that result in a pyramidal form cutting tooth. The number of left-hand spirals shall be from 70 to
90 percent of the number of right-hand spirals. Style E rotary files shall have straight fluting that meets at the conical cutting surface.
4. REGULATORY REQUIREMENTS
4.1 Recycled, recovered or environmentally preferable materials. The offeror/contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR).
5. QUALITY ASSURANCE PROVISIONS
5.1 Product conformance. The product provided shall meet the salient characteristics of this commercial item description; conform to the producer's own drawings, specifications, standards, and quality assurance practices; and be the same product offered for sale in the commercial market. The government reserves the right to require proof of such conformance.
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