1、 - A-A-55525 9018054 000320Y 857 A-A-55525 1 INCH-POUND A-A-55525 10 SEP 1998 SUPERSEDING MIL-L-14576F March 24,1989 COMMERCIAL ITEM DESCRIPTION LATHE, ARMATURE, AND UNDERCUTTER The General Services Administration has authorized the use of this Commercial Item Description (CID) for all federal agenc
2、ies. 1. SCOPE. This CID covers armature lathes with an undercutter attachment used in the reconditioning of the commutator part of electric motor armatures. 2. CLASSIFICATION. The lathes shall be of the same type and of the sizes specified in the contract or order. 2.1 SIZE Size 1 -12.5 inches. Size
3、 2- 22.5 inches. 3. SALIENT CHARACTERISTICS 3.1 Desian. The lathe shall be designed for bench top mounting and shall include all components, parts, and features required to meet the specified performance requirements. The lathe shall consist of a bed, an electric motor, headstock, tailstock, a movab
4、le tool carriage, and mica undercutter. The tailstock shall be repositionable along the bed to accommodate various lengths of motor armatures. The tool carriage shall permit movement of the armature cutting tool along the entire surface of the commutator. The lathe shall be fully adjustable to compe
5、nsate for wear, and the components shall be accessible for repair without the necessity to modify the lathe. 3.1 .I Tool Carriaae. The tool carriage longitudinal feed shall be provided by a lead screw, which shall be actuated by a ball crank handle or a handwheel. 3.1.2 Tool Holder. The tool carriag
6、e shall be equipped with a tool holder and a cutting bit ground for commutator turning. The tool holder shall be provided with means for adjusting the depth of cut and a locking device for locking the tool at any setting. The depth of cut shall be continuously adjustable over its range. Adjustment s
7、hall be provided by a graduated thumbscrew or feed wheel. FSC 4940 Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Defense Supply Center Columbus, AlTN: DSCC-VAI, Columbus, Ohio 4321 6-5000. Provided by
8、IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - A-A-55525 m 901r8054 0003205 793 m Size 1 2 . - A-A-55525 * 3.2 Measurement Svstem. The US inch system shall be used for the specifications, dimensions and operator controls. Distance between Type of undercutter
9、 Chuck capacity Swing over bed chucks (Inches) (Drive mechanism) (Inches) (Inches)(min) 12.5 Uses undercutter 1.047 to 1.063 6 22.5 Electric Motor 1 .o47 to 1 .o63 6 Drive Belt 3.3 Lubrication. The lathe shall be equipped with a lubrication system that permits application of the necessary lubricants
10、 without disassembly of lathe components. 3.4 Requ ired Accuracv. The lathe shall be capable of machining a turned cylindrical surface, of the armature undergoing reconditioning, within 0.0005 inch total indicator reading runout, withno more than 0.005 i taper per linear inch. The machined surface s
11、hall have a roughness value of not more than 63 microinches, arithmetical average, IAW ANSI EM6.1. 3.5 Lathe Canacity. The lathe shall have the capacity to rotate an armature with a diameter of 6 inches. The lathe shall be able to support armatures 13 inches long (including the shaft length) with a
12、shaft diameter up to 1 .O63 inches. It shall be capable of machining and undercutting commutators that have a maximum diameter of 3.313 inches and a maximum length of 2.5 inches. 3.6 Undercutter Capacity. The undercutter shall be capable of removing the mica between all bars of the commutator to a d
13、epth of 0.031 3 t 0.005 in. The undercut shall be parallel to the centerline of the lathe within 0.005 in. The undercutter shall be mechanically driven. 3.7 Lathe Components. The lathe shall be equipped with the following accessories: a. Thrust plugs for the head and tailstock b. Removable hardened
14、steel centers for the head and tailstock c. A cutting tool ground for commutator turning d. Undercutting tools 0.01 5,0.020, and 0.025 inches wide. e. Self centering head and tailstock chucks with removable jaws and a capacity from 0.203 to 1 .O63 inches. 3.8 Machinina Adiustments. Both the commutat
15、or turning tool and the mica undercutter shall have depth of cut adjustments, which are lockable at any point over their range of motion. 3.9 Armature Drive. The armature shall be rotated via a belt encircling the core of the armature. The belt shall be driven by an electric motor. The drive system
16、shall be adjustable to accommodate a variety of 3.1 O Electrical reauirements. The lathe shall be designed to operate on single phase, 1 1 O volts, 60-Hertz (Hz)current. Any power cord (s) shall be 8 long and will comply with the manufacturers already approved UL listed cords. . armatures per paragr
17、aph 3.6. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I A-A-55525 = 90LB054 000320b b2T A-A-55525 3.10.1 Motors. Motors shall be rated for continuous duty. Each motor shall have a drip proof enclosure. Unless otherwise specified the manufacturer
18、s standard motor shall be provided. 3.1 1 Standard eaubment. All standard equipment normally provided with the manufacturers commercial lathe shall be furnished. 3.1 2 Examination and test. 3.12.1 Examination. Each lathe shall be visually examined to determine compliance with all requirements of thi
19、s commercial item description. 3.12.2 Operational test. Each lathe shall be tested in accordance with the manufacturers own internal test procedures. Proper operation of all controls, motors, adjusting mechanisms, and accessories shall be verified during the test. 3.1 2.3 Performance test. Each lath
20、e shall be operated at its maximum dimensional capacity to verify that the resulting machined armature complies with the tolerances specified in 3.5. Operation shall be conducted without making any adjustments to or performing any maintenance on the lathe. Proper operation of all controls, motors, a
21、djusting mechanisms, and accessories shall be verified during the test. 3.12.4 Alianment test. Each lathe shall be tested in accordance with the manufacturers own internal test procedures to determine compliance with the alignment requirements specified in paragraph 3.5. 3.1 3 Data plates. All stand
22、ard data plates normally provided with the manufacturers standard commercial lathe shall be furnished. Any additional data plates shall be as specified and fully described by the procuring activity. 3.1 4 Safety. Safety devices shall be provided as necessary. Any guards shall be removable for easy a
23、ccess to guarded parts. The Lathe shall comply with the general safety provision of 29CFR 1910 that are applicable. 3.1 5 Metric products. Products manufactured to metric dimensions shall be considered on an equal basis with those manufactured using inch-pound units. Metric products shall be conside
24、red so long as they fall within specified tolerances using conversion tables contained in the latest revision of FED-STD- 376, and all other requirements of this commercial item description are met. 4. REGULATORY REQUIREMENTS 4.1 Recovered materials. The offeror/contractor is encouraged to use recov
25、ered 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 products provided shall meet the salient characteristics of the CID, conform to the producers own drawings,
26、 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. 5.2 Market acceDtabilii. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted witho
27、ut license from IHS-,-,- A-A-55525 Size 1 2 A-A-55525 MFGR NSN CID P.N. PIN 6-1 O 4940-00-263-3077 A-A-XXXM-1 SP-B15 4940-01-375-731 1 A-A-XXXM-2 M 9038054 0003207 5bb = a. The company producing the item must have been producing a product meeting the requirements of the CID for at least 5 years. b.
28、The company must have sold at least 25 units meeting the requirements of the CID over the past 2 most recent procurement years. 6. PACKAGING. Preservation, packing, and marking shall be as specified in the contract or order. 7. NOTES. 7.1 The following patt identification numbering procedure is for
29、government purposes and does not constitute a requirement for the contractor. A-A-XXXXX y Size: (Table i) 1- 12.5 inches 2- 22.5 inches CID number 7.3 n. 7.3.1 Federal Standards, FED-STD-376 is available from the Standardization Documents Order Desk, Building 40,700 Robbins Avenue, Philadelphia, PA
30、191 1 1-5094. 7.3.2 OSHA, 29 CFR 1 91 O is available from the Superintendent of Documents, U.S. Government Printing ffice, Washington, DC 20402-0001. 7.3.3 ANSI 846.1 is available from the American National Standards Institute, ATTN: Sales Dept., 1430 Broadway, New York, NY 1 O01 8. 4 Provided by IH
31、SNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- a A-A-55525 OL8054 0003208 4T2 A-A-55525 7.3.4 The Federal Acquisition Regulation (FAR) 23.403 may be obtained from the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402. 7.4 Intende
32、d use. Lathes covered by this commercial item description are for use in machining the commutator part of an electric motor armature in repair and maintenance shops. MILITARY INTEREST Custodians: Army - AL Navy - SH Air Force - 99 CIVIL AGENCY COORDINATION ACTIVITY: GSA - FSS Preparing activity : DLA - CC (Project 4940-0723) Reviewers: Air Force - 84 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
