1、I lNCH/POUND II IA-A-2558A.hrh 22,2003SUPERSEDINGA-A-2558February 14,1988I COMMERCIAL ITEM DESCRIPTIONDRILL, RATCHET (REVERSIBLE)The General Services Administration has authorized the use of this commercial item descriptionby all federal agencies.1. SCOPE. This commercial item description covers han
2、d-operated, reversible ratchet drills withAmerican standard self-holding taper sockets.2. CLASSIFICATION. Not applicable3. SALIENT CHARACTERISTICS.3.1 Design. The ratchet drills shall consist essentially of a handle and head, body, ratchet mechanism,feed screw, pawl, and feed pin. Ratchet drills sha
3、ll be furnished with a short spindle with feed screwwhich enables ratchet to be converted into a boiler ratchet or adapter, to use square taper shrink drills.Ratchet drills, when tested as specified, shall be capable of withstanding the applicable torque loads.Handles and tapered sockets shall show
4、no indication of permanent set, cracks, or flaws and the ratchetmechanism and ratchet reverse control pawl engaging surfaces shall show no damage.AFigure 1. Reversible ratchet drill, American Standard self-holding taper socketBeneficial comments, recommendations, additions, deletions, clarifications
5、, etc. and any other datawhich may improve this document should be sent to: General Services Administration, FederalSupply Service, Hardware SuperStore (6FEE), 1500 Barmister Rd. Bldg. #6, Kansas City,I Missouri. 64131. IFSC 5110Provided by IHSNot for ResaleNo reproduction or networking permitted wi
6、thout license from IHS-,-,-A-A-2558A3.2 Handle and head, The handle and head shall be either integral, threaded or the head shall be weldedsecurely to the handle. The handle shall be either a straight, round steel bar, or steel tubing smoothlyfinished to afford a comfortable handgrip. The head shall
7、 be drop-forged steel or malleabIe iron and aIlsurfaces that bear or mate with the body shall have a satin finish.3.3 The body shall be drop-forged steel with a minimum often (1O) teeth or notches on theoutside diameter to assure ratcheting with the handle having a swing of 36 degrees or less. The i
8、nsidetapered hole shall be either American Standard taper or bitstock taper to accommodate drill shankswithin the capacity of the drill. The tapered hole shall be smooth y finished and shall be concentric withthe bearing surfaces on the outside diameter. The outside diameter of the spindle or the en
9、d opposite thetapered hole shall be threaded to accommodate a body nut, or other means provided for securely holdingthe body in tbe head. The body shall form a part of the ratchet mechanism. The taper square hole shallbe smooth and concentric with the bearing surface on the outside diameter.3.4 Sock
10、ets. Sockets for ratchet drills shall have a standard self-holding taper in accordance withASME B5.1O,3.5 Ratchet Mechanism. The ratchet mechanism shall be enclosed in the head and secured in such amanner as to minimize loosening during extreme usage. The ratchet mechanism shall be reversible bymove
11、ment of a shifting lever, knurled button, or equal means which permits ratcheting operation of thebody in either direction of rotation. The shifting lever or button shall be steel and shall be located in thehead or at tbe handgrip end of the handle.3.6 Feed Screw. The feed screw shall be alloy steel
12、. The outside diameter of the screw shall bethreaded with a class 3 thread for engaging the spindle end of the body. One end of the screw shall havea knurled collar with at least four (4) ho es equally spaced at right angles to the axis to provide meansfor applying pressure to the drill. Tbe knurled
13、 end of the screw shall be provided”with an integral orremovable hardened-steel center.3.7 The pawl shall be hardened alloy steel. The paw shall be firmly attached to a rod or pinsuitable for reversing the action of the ratchet. A spring OTother means shall be provided for applyingthe proper tension
14、 on the paw when engaged in the teeth or notches of the body.3.8 Feed Pin. The feed pin shall be steel, suitable for regulating the feed screw in order to applypressure to the drill.3.9 Screw Threads. The screw threads used with the ratchet drills shall be in conformance with thescrew-thread standar
15、ds of FED-STD-H28.3.10- All exposed metal surfaces of the ratchet drills shall have one of the coatings specifiedbelow. All external surfaces shall be free from pits, nodules, forge flash, cracks, burrs, and otherdetrimental defects.3,10.1 Bri.zht Chromium Plate. The coating shalI be electro-deposit
16、ed metals consisting of nickelfollowed by chromium. The minimum thickness shall be 0.0002 inch for nickel and 0.00001 inch forchromium.3.10.2 Bright Znc Plate. The coating shall be electro-deposited nickel. The minimum thickness shall be0.0002 inch.2Provided by IHSNot for ResaleNo reproduction or ne
17、tworking permitted without license from IHS-,-,-.A-A-2558A3.10.3 Zinc Plate. The coating shall be electro-deposited zinc and shall be subjected to a chemical 01electrochemical chromating. The minimum thickness shall be 0.0003 inch.3.10.4 Hot Phosphate. The coating shall consist of chemically produce
18、d phosphate, followed by acoating of preservative.3.10.5 Oxide Coating. The coating shall consist of chemically produced oxide, followed by a coating ofpreservative.13.11 Identification Marking, Each drill shall be etched or stamped in permanent and legible mannerwith the manufactures name or identi
19、fying symbol of such known character that the source maybereadily identifiable, part number, and country of origin.3.12 Workmanship. All drills shall be free from imperfections which may affect their safety,appearmce, serviceability, or durability.NSN Size Height Length Length American Size of Drill
20、 TorqueNumber of head of feed of handle Standard inch Load(max) (rein) (rein) Taper (rein)inch inch inch Socket pound-Number inch5110-00-555-1784 1 5 2 9 1 1/16 to 9/16 25005110-00-223-5028 8 6-314 2-112 15 3 59/64 to 1-1/4 5500Table L American Standard self-holding taper socket4. REGULATORY REQUIRE
21、MENTS.4.1 Recovered Material. The offeror/contractor is encouraged to use recovered materials to themaximum extent practicable, in accordance with paragraph 23.403 of the Federal acquisition Regulation(FAR).5, PRODUCT CONFORMANCE.5.1 Product Conformance. The product provided shall meet the salient c
22、haracteristics of thisCommercial Item Description, conform to the producers own drawing, specifications, standards, andquality assurance practices, and be the same product offered for sale in the commercial market. Thegovenunent reserves the right to require proof of such conformance.5.2 Responsibil
23、ity for Inspection. Unless otherwise specified, the contractor is responsible for theperformance of all inspection requirements and may use any commercial facilities (including thecontractors own facilities) suitable for performance of the inspection requirements, unless disapprovedby the Government
24、. The Government reserves the right to perfomr any of the inspections deemednecessary to assure the item conforms to the specified requirements.6. PACKAGING. Preservation, packaging and marking shall be as specified in the contractor order.7. NOTES. This section contains information of a general or
25、explanatory nature that is not mandatory.7.1 Source of Documents.3Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.“A-A-2558AAmerican Society of Mechanical Engineers (ASME) Manuel Gutierrez, Managing Director, 3 ParkAvenue, New York, NY 10016.Federal
26、 standards are available from U.S. Government Printing Office, Washington, DC 20401-9371.Federal Acquisition Regulation (FAR): Government Printing Office, Superintendent of Documents,Washington DC, 20401-9371.7,2 Ordering data. Purchasers should select the preferred options permitted herein and shou
27、ld includethe following information in procurement documents.a. Title; number and date of Commercial Item Description.b. National Stock Number and size number.c. Packaging requirements.MILITARY INTERESTS:NONE: DoD has no registered interestin revisions and amendments to thisCommercial Item Description until furthernotice.Preparing Activity:GSA-FSS4Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
