A-A-51189 Socket, Taper, Reducing SleeveThis commercial item description CID establishes the government acquisition requirements for reducing sleeve taper sockets used to adapt small taper shank tools to larger size spindles.

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A-A-51189A

3.  SALIENT CHARACTERISTICS.  The socket design shall be similar to the configuration shown in figure 1.  A drift (tang) slot shall penetrate the tapered bore.  The material quality shall be sufficient to ensure product compliance with the requirements of this document.

E

D                        B                                                A

FIGURE 1.  Socket, taper, reducing sleeve.

3.1  Dimensions.  The internal taper (A) and external taper (B) shall be selected from table I.  The gage line diameter (C) and tang slot (D) shall comply with the taper dimensions specified in American Society of Mechanical Engineers (ASME) B5.10, "Machine Tapers (Self Holding and Steep Taper Series)" (DoD adopted).  Unless otherwise specified in the acquisition order (see 7.3(c)), socket length (E) shall be the standard length.

3.2  Concentricity.  The external taper shall be concentric with the internal taper within 0.002 inch total indicator reading (TIR) projected five inches from the socket mouth.

3.3  Hardness.  Unless otherwise specified in the acquisition order (see 7.3(d)), socket hardness shall not be less than "30" on the Rockwell "C" hardness scale when tested in accordance with the American Society for Testing and Materials (ASTM) E 18, "Standard Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials" (DoD adopted).

3.4  Finish.  The external taper shall have a ground finish.

3.5  Special use (broken tool).  If specified in the acquisition order (see 7.3(e)), the socket provided shall have a flattened surface on the inner taper to allow the socket to be used with small taper shank tools with broken tangs and flattened shanks.

3.6  Marking.  The socket shall be permanently marked with the manufacturer's name or with a well- known trademark.  The socket shall also be permanently marked with the American Society of Mechanical Engineers (ASME) numbers (see table I) designating the socket internal and external tapers.

4.  REGULATORY REQUIREMENTS

4.1  Recovered material.  The offeror or contractor is encouraged to use recovered materials to the maximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR).

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