1、- - A-A-50457A 51 M 7777774 00427b2 7 A-A-50459A April 14, 1989 SUPERSEDING May 24, 1983 A-A-50459 COMMERCIAL ITEM DESCRIPTION SHEARS, METAL CUTTING, ELECTRIC (PORTABLE) Abstract. This commercial item description (CID) covers two types of portable electric shears for straight and/or contour cutting
2、of ferrous and nonferrous sheet materials: - Salient characteristics. 1. Types and sizes: Types and sizes shall be in accordance with table 1 and as follows: Type I shears shall be manually held and guided type, single shear action with a pair of blades, one the stationary blade, the other blade wit
3、h reciprocating movement. Type II shears shall be hand guided double shear action with one cutting blade pivoted to operate between two stationary blades producing double shear action, and shall be provided with a swivel head having a locking device to fix the head in one of several positions. TABLE
4、 I. Requirements. I I I I I I I I I l I Capacity I I I I I I Steel I Cutting I Cutting I Overall I Weight I I Manufacturers (thickness1 Rate I radius I length Iw/o cable( Si ze I gage I(approx.)l (min.) I ( min.) I ( max.) I ( max.) I I Inch I Ft Min I Inches I Inches 1 Pounds I 18 - I 0.048 I 15 I
5、1 I 12 I 10 I I I I 11 21 16 - I 0.060 I 15 I 1-1/21 14 I 12 I 31 12 - I 0.105 I 15 I 2-1/21 15 I 16 I 41 18 - I 0.048 I 151 3 1131 5 I 51 14 - I 0.075 I 10 I 3/4 I 11 i 51 18eneficial comments (recommendations, additions, deletions, clarifications, I !etc., and any other data which may improve this
6、 document should be sent by I Iletter to: Commanding Officer, Naval Construction Battalion Center I I(Code 156), Port Hueneme, CA 93043-5000). I FSC 5130 DISRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. 1 THIS DOClJ!WJT CONTAI b. Insulation resistance; c. Dielectric s
7、trength; d. Current input; and e. Temperature ri se. Cutting blades. steel with Rockwell C scale hardness of 57 to 60 for type I shears and 55 to 60 for type II. to the operator to enable the operator to follow the line to be cut. Cutter blades shall be mounted for convenient adjustment and replacem
8、ent. Cutting blades shall be of heat treated alloy tool The reciprocating cutter blades shall be visible Switch. quick break design. Self-releasing switches shall return to the “OFF” position when pressure is removed and shall be provided with a locking pin for locking in ilOM1l position. type shall
9、 be marked to indicate iOW1l and llOFF1l positions. shall comply with the requirements of UL 45. Shears shall be provided with a conveniently located switch of Switches other than self-releasing Switches Wiring. All wiring, flexible cord, attachment plug cap and grounding means shall be in accordanc
10、e with Ut 45. The cord shall have an attachment plug cap and unless otherwise specified, a minimum free length of 9 feet measured from point of entry into the shears. Housings. Housings shall be of a material of suitable characteristics to withstand stresses imposed by normal usage. Housings shall i
11、nclude the motor case, gear and cam and reciprocating mechanism housing. Gears and shafts. Gears shall be alloy steel. Where worm gearing is used, the gearing shall consist of a steel worm and bronze worm wheel. Gears shall have machine cut or formed teeth and be designed and supported to efficientl
12、y transmit imposed loads. alloy steel supported by at least two bearings to prevent deflection. Gears and shafts shall be fully enclosed. Shafts shall be of Bearings. Armature shafts shall be mounted in ball or roller bearings. Rotating shafts, other than the armature shaft, shall be mounted in ball
13、, roller or needle roller bearings. Reciprocating shafts may be mounted in bronze sleeve bearing. Roller or needle roller bearings which are designed primarily for radial loads shall not be used to absorb trust loads. Steel inserts may be omitted in the mounting of between bearing outer diameter and
14、 housing is provided. Bearings shall be of the dustproof sealed type or shall be mounted in a dustproof housing. Ball, roller and needle roller bearings shall conform to ANSI 83.5 for tolerances, 83.6 for dimensions and 83.8 for mounting requirements for the type and size bearings used and (AFBMA St
15、andard Section No. 5) for identification. bearings when sufficient contact area and a suitable fit 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A -A -504 59A 19. 20 21. 22. 23. 24. 25. 26. 27. a - Yoke. lhe yoke shall contain the stationary cutt
16、er blade and shall be attached to the reciprocating cutter housing. material and cross-sectional area suitable to maintain cutter blade adjustment and alignment. The yoke shall be of a Handles. Type I shears shall be equipped with a comfortable closed double grip handle. Type II shears shall have a
17、pistol grip handle. I Swivel head. Type II shears shall be provided with a swivel head having a locking device to fix the head in one of several positions. The swivel head shall contain the cutting blades. Electromagnetic interference. When specified, each shear shall be electromagnetic interference
18、 free in accordance with the requirements of MIL-STD-1331 for class II 6 equipment. If electromagnetic interference suppression is required the manufacturer shall provide certification that the electromagnetic suppression network in the shears offered is identical to that of the shears previously te
19、sted and approved. Moisture-and-funsus-resistant-treatment, When specified in the contract, electrical components of shears covered by this specification shall be moisture-and-fungus-resistant treated with material conforming to and applied as required by MIL-T-152 and WIL-V-173 as applicable. Ident
20、ification plate. A corrosion resistant nameplate, permanently, and legibly marked to include the following information shall be securely attached to the shear: o a. Manufacturers name, model or serial number. b. Mild steel cutting capacity. c. Voltage. d. Rated-load amperes. Instruction book. Unless
21、 otherwise specified in the contract, the manufacturer shall furnish one copy of his standard instruction book and parts list with each shear. Accessories. Each shear shall be furnished with one extra set of cutting blades and such accessories and other extra parts as normally furnished commercially
22、. Workmanshie. Workmanship of the shears shall be of the quality prevailing among manufacturers normally producing shears of the type and sizes specified herein. Contractor certification. The contractor shall certify and maintain substantiating evidence that the product offered meets the salient cha
23、rcteristics of this and that the product conforms to the producers own drawings, specifications, standards and quality assurance practices. The Government reserves the right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisi
24、ons of the contract. . 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. - A-A-50457A 51 7797774 O042766 6 A-A-50459A Metric products, Products manufactured to metric dimensions will be considered on an equal basis with those manufactured using inc
25、h-pound units, provided they fall within specified tolerances using conversion tables contained in the latest revision of Federal Standard No. 376, and all other requirements of this Commercial Item Description are met. If a product is manufactured to metric dimensions and those dimensions exceed th
26、e tolerances specified in the inch/pound units, a request should be made to the contracting officer to determine if the product is acceptable, The contracting officer has the option of accepting or rejecting the product. Regulatory requirements. recovered materials in accordance with Public Law 94-5
27、80 to the maximum extent practicable. The ofFeror/contractor is encouraged to use Preservation. packaging, packing and marking. 1. Preservation, packaging, packing and marking shall be in accordance with the requirements of MIL-H-15424 for portable electric grinders. Levels of preservation, packagin
28、g and packing shall be as specified in the contract or order. 2. Marking. a. Military agencies. In addition to any special marking required or herein, interior and exterior be marked in accordance with by the contract, or order shipping containers shall b, Civil agencies. in addit in the contract or
29、 order. MIL-STD-129. on to any special marking specified each unit and intermediate package and shipping container shall be marked in accordance with Fed. Std. Mo. 123. CID base part identifying number (PIN). The PIN to be used for shears acquired to this Commercial Item Description are created as f
30、ollows: X A 50459 - X - I I I I I I Type Number Size Number CID Number I I I 1 I I CID Notes. Purchasers should select the perferred options permitted herein and include the following information in procurement documents: 1. Title, number and date of this specification. 5 Provided by IHSNot for Resa
31、leNo reproduction or networking permitted without license from IHS-,-,-A -A -504 59A 2. Type and size required. 3. Length of cord, if different from standard 9 ft. 4. Electromagnetic interference, when specified. 5. Moisture-and-fungus-resistant treatment when required. 6. Instruction book requireme
32、nts, if different. 7. Levels of preservation, packaging and required. American National Standards are available from the American Nationa Institute, Inc, 1430 Broadway, New York, New York 10018. Standards Anti-Friction Bearing standards are available from the Anti-Friction Bearing Manufacturers Asso
33、ciation, 60 East 42nd Street, New York, MY 10017. National Motor Freight Classification standards are available from the Amercan Trucking Associations Inc., Traffic Department, 1616 P Street, W.W., Washington, DC 20036. National Bureau of Standards (NBS) Handbook are available from superintend of do
34、cuments Government printing office Washington, D.C. 20402. , UL standards are available from the Underwriters Laboratories, Inc, 333 Pfingsten Road, Northbrook, IL 60062. Uniform Freight Classification standards are available from the Uniform Classification Committee, Suite 1106, 222 South Riverside
35、 Plaza, Chicago, IL 60606. MILITARY INTERESTS: CIVIL AGENCY COORDINATING ACTIVITIES: Custodians GSA - FSS Navy - SH Air Force - 99 Review Activity PREPARING ACTIVITY: Navy - YD Project No. 5130-0320 Air Force - 84 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
