A-A-51563
28 July 1986
COMMERCIAL ITEM DESCRIPTION
ARBOR AND BAND SET, Dental Handpiece
The General Services Administration has authorized the use of this commercial item description in preference to Interim Federal Specification GG-A-00671C.
This commercial item description covers an arbor and band set suitable for use with straight type dental handpieces or with dental latches, in the grinding and finishing of dental prosthetic appliances.
Salient characteristics:
The arbor and band set shall be an assembly consisting of an arbor, sleeve, band with outer surface of silicon carbide, and screw. The component of the arbor and band set shall conform to figure 1. Washers shall be used only with the large sleeve in assembly. The arbors, screws and washers shall be made from corrosion-resisting steel, or carbon steel, nickel or chromium plated. The arbor, screws and washers shall be of proper temper and suitable for the purpose intended.
The sleeve shall be made from natural or synthetic rubber of suitable grade with a hardness of 50A to 60A durometer. The resiliency of the rubber sleeve shall remain suitable for the use intended when subjected to the accelerated aging test in accordance with method 7221 of FED-STD-601. As an alternate, the sleeves shall remain flexible and suitable for the use intended for not less than (5) years from date of delivery to the Government when stored at 50° to 90° Fahrenheit. The sleeve shall be capable of expanding when the arbor screw is tightened, in order to hold the abrasive band firmly in place.
The abrasive band shall consist of an inner and outer band fastened together, by a suitable adhesive, to form a closed circular band. The inner band shall be jeans cloth. The outer band shall be jeans cloth having its outer surface closed coated with 60 or 880 grit silicon carbide. The jeans cloth shall have a thread count of 96 warp by 64 filling per inch. The joints of both the inner and outer bands shall be of the 45 ± 5 degree angle, butt type, bonded with a good quality animal hide glue or equivalent adhesive. The joint of the inner band shall be positioned diagonally and diametrically opposite the joint of the outer band. The abrasive band shall be of such flexibility as to withstand the required operating procedures.
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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