A-A-54327
Hardness. The drills shall have a Rockwell hardness of C56 to C58 in accordance with ASTM Designation E18 or E92 and E140.
Runout. The total indicated runout of the drills shall not exceed 0.001 inch. One drill of each size shall be placed and held in a “V” block or precision chuck, and rotated slowly. A dial indicator sensitive to 0.0002 inch and equipped with a knife-edge foot, or a shadow graph or other suitable equipment of equal accuracy, shall be employed. If a dial indicator is perpendicular to the axis of the drill, and so positioned that the foot contacts the drill at the point of smallest diameter. The maximum and minimum readings obtained during one complete 360-degree rotation of the drill shall be measured and recorded to the nearest 0.0005 inch. The difference between these two readings shall be taken as the total indicated runout.
Sterilization. The drills shall be capable of withstanding repeated sterilization via steam, ethylene oxide or long term, 10 hour soaking in cold sanitization solution. The drills shall show no evidence of corrosion when autoclaved as specified herein.
Finish. The finish of the drills shall be smooth, bright and uniform, except the operative ends shall have a fine honed finish with sharp cutting edges.
Marking. The use of a trademark is acceptable. The type of marking or placement of the marking shall not adversely affect or interface with fit, function and operation of the drill with the Jacob chuck type hand and power drills. The marking shall be distinguishable to the unaided eye.
Instructions. Adequate and accurate instructions shall be furnished on the use and care of the twist drills. Instructions shall also include the type of solutions, both suitable and unsuitable for cold sanitization of the drills.
Workmanship. The drills shall be free from defects such as cracks, pits, jagged edges or burrs which detract from their appearance or impair their serviceability.
Unit. Each (EA). One twist drill of the size specified, constitutes one unit.
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