GSA A-A-1011-1983 CASTER SWIVEL (CHAIR)《转头铸机(椅式)》.pdf

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1、“ I A-A-101 1 January 6, 1983 COMMERCIAL ITEM DESCRIPTION CASTER, SWIVEL (CHAIR) The General Services Administration has authorized the use of This commercial item description in preference to Federal Specification FF-C-82. This description covers commercial quality swivel casters suitable for use o

2、n metal and wood office chairs. Salient characteristics: Types - The ball bearing swivel chair casters shall be of the following styles and sizes, as specified: Style A - plain stem Style C - flat plate Size A - 1-518 or 1-314 inch diameter wheel Size B - 2 inch diameter wheel Dimensions - See table

3、 I for the size and mounting dimensions of style A and C casters. +El- FIGURE I TABLE I Size (inches) C (5 1/16) D (min) E (min) F (rnax) G (rnax) H (rnax) I(+ 1/32) J (2 1/32) K (2 1/32) A 1-518 or 23/32 314 2-518 1-3/16 1-9/16 13/16 1-9/16 13/64 1-314 B 2 23/32 1-3/16 3 1-3/16 2-318 13/16 1-9/16 1

4、3/64 FSC 5340 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-LOLL 53 W 777777q OOOL70b b W F I A-A-1011 Note: If dimensions are required for Style C casters that are other than those specified in table I, the contract or purchase document should

5、 state that as an exception to this CID the dimensions shall be as specified and the required dimensions should be clearly defined. Wheel, The core shall be high quality, impact resistant hard rubber. The cushion tread shall be high quality, Hardness. The Durometer Hardness in accordance with ASTM D

6、 2240 shall be as follows: Hard rubber 75 - 85 nonstaining and shitable for use on smooth hard floors. Shore D; Soft rubber 70 - 85 Shore A. Adhesion. The core and the tread shall be permanently molded together. Bearing, The core shall have a securely attached, self-lubricating, oil impregnated cyli

7、ndrical bushing. The Axle. The axle shall be the nut and bolt or solid rivet type. The axle shall be keyed or otherwise fixed to the Swivel. Swivels shall be of shielded construction and shall b single, split or double level, double ball bearing, or Raceways. Raceways shall be formed or machined and

8、 shall be smooth, hardened, and plated to prevent Ball bearings, Ball bearings shall be hardened, but not work hardened, and shall be polished and plated to resist Lubrication. The swivel assembly shall be prelubricated at the assembly point with a water repellent grease. Yoke. The yoke shall be for

9、med and hardened to assure strength and durability at the specified design load. Stem. Style A casters shall have cold drawn stems which shall be a minimum of 3/8 inch or a minimum of 7/16 inch in diameter as specified, To permit independent swiveling of the yoke, the stem shall be permanently faste

10、ned in the swivel. Wood chair socket. The socket shall be designed to grip the Style A caster stem and anchor in the mounting Metal chair socket. When required with the plain stem Style A caster, the socket shall have a separate spring Friction ring. When required, the stem shall be equipped with a

11、separate spring material holding device. Finish. The caster shall be nickel, chrome or zinc plated or otherwise protected against corrosion as specified. Identification. Each yoke or horn shall be permanently and legibly identified with the manufacturers name and Floor marking test. A chair with ide

12、ntical casters shall be loaded to sour times the manufacturers rating of the individual caster. The chair shall be cycled through six wheel revolutions in each direction. Visible marks left on a hardwood or concrete floor shall be considered evidence of a failure. bushing shall be of powdered metal

13、and shall have a high bronze content. horn to prevent turning the wheel, loosening or binding. other as specified, Operation shall be smooth and nonbinding. corrosion. corrosion. surface. type gripping device. Axles and nuts shall be zinc or cadmium plated. trademark. Caster durability test. Four id

14、entical casters shall be tested for serviceability in accordance with ANSI X5.1, Workmanship. The caster shall be free from imperfections which may impair durability or serviceability. The issues of ASTM D 2240 and ANSI X5.1 in effect on the date of the solution shall be used to determine Section 17

15、. compliance with these requirements. Notes: The purchaser should specify the style and size of casters required. Purchaser should state if dimensions other than specified for Style C casters are required. Purchasers should specify required minimum diameter of stem for style A casters. Preservation,

16、 packaging, packing, labeling, and marking. The preservation, packaging, packing, labeling, and marking shall be as specified in the contract or order. 2 p-7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-LOLL 53 W 777777Lt OOOL707 B A-A-1011 AS

17、TM Standard D 2240 is available from the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103. ANSI Standard X5.1 is available from the American National Standards Institute, 1430 Broadway, New York, NY 10018. MILITARY INTERESTS: CIVIL AGENCY COORDINATING ACTIVITIES:

18、Coordinating Activity Army - AR Custodians Army - AR Navy - YD Air Force - 99 Review Activities DSC - IS Army - ME Navy - MC User Activities Navy - YD, MC NASA - 3FK VA - VOC PREPARING ACTIVITY: GSA - FSS Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-