1、KKK-L-370D 25 W 7779774 0033667 5 K-c?-/h I FEDERAL SPECIFICATION LINING, FRICTION, (CLUTCH AND Ba, METALLIC, METAL-CERAMIC AND SEYIMETALLIC) KKK-L-370D 16 June 1988 SUPERSEDING KKK-L-370C AMENDMENT 2 28 JANUARY 1966 This specification was approved by the Commissioner, Federal Supply Service, Genera
2、l Service Administration, for the use of all Federal agencies. 1. SCOPE 1.1 Scope. This specification covers metallic, metal-ceramic, and semimetallic friction linings that are for replacement of clutch and brake linings (see 6.1). Linings include continuous ring, ring segment button type, and cylin
3、drical segment or block type linings. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US Army Tank-Automotive Command, ATTN: AMSTA-GDS, Warren, MI 48397-5000, by using the self-addressed Standar
4、dization Document Improvement Proposal (DD Form 1426) appearing at the end - of this document, or by letter. AMSC NIA FSC 2520 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. THIS DOCUMENT CONTAINS 14 PAGES. P Provided by IHSNot for ResaleNo reproduction or networki
5、ng permitted without license from IHS-,-,-KKK-L-370D 25 W 7997774 00L3bb 7 W - KKK-L- 3 7 OD 1.1.1 Federal specification coverage. Federal specifications do not include all types of the commodityc indicated by the titles of the specifications, but are intended to cover only those most generally used
6、 by the Federal Government. 1.2 Classification. 1.2.1 - Types. The linings covered by this specification shall be of the following types as specified (see 6.2): Type I - Copper or bronze-base lining surface. Type II - Iron-base lining surface. Type III - Metallic-ceramic lining surface. 2. APPLICABL
7、E DOCUMENTS 2.1 Government documents. The following documents, of the issues in effect on date of invitation for bids or request for proposal, form a part of this specification to the extent specified herein. SPECIFICATIONS FEDERAL PPP-B-566 PPP-B-601 PPP-B-62 1 PPP-B-636 PPP-B-676 STANDARDS FEDERAL
8、 FED-STD-102 FED-STD-123 - Boxes, Folding, Paperboard. - Boxes, Wood, Cleated-Plywood. - Boxes, Wood, Nailed and Lock-Corner. - Box, Fiberboard. - Boxes, Setup. - Preservation, Packaging, and Packing - Marking For Shipment (Civil Agencies). Levels (Activities outside the Federal Government may obtai
9、n copies of Federal specifications, standards, and commercial item descriptions as outlined under General Information in the Index of Federal Specifications, Standards and Commercial Item Descriptions. The Index, which includes cumulative bimonthly supplements as issued, is for sale on a subscriptio
10、n basis by the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402 ) (Single copies of this specification, and other Federal specifications and commercial item descriptions required by activities outside the Federal Government for bidding purposes, are available withou
11、t charge from General services Administration Business Service Centers in Boston, MA; New York, NY; Philadelphia, PA; Washington, DC; Atlanta, GA; Chicago, IL; Kansas City, MO; Fort Worth, TX; Houston, TX; Denver, CO; San Francisco, CA; Los Angeles, CA; and Seattle, WA.) I 2 Provided by IHSNot for R
12、esaleNo reproduction or networking permitted without license from IHS-,-,-KKK-L- 3 7 OD (Federal Government activities may obtain copies of Federal standardization documents and the Index of Federal Specifications, Standards and Commercial Item Descriptions from established distribution points in th
13、eir agencies.) SPECIFICATIONS MILITARY MIL-P-116 MIL-B-117 MIL-P-4 6 O9 3 - Preservation, Methods of. - Bags, Sleeves and Tubing - Interior - Primer Coating, Synthetic (For Brake Packaging. Drums ) . STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for MIL-STD- 129 - Marking for Shipm
14、ent and Storage. MIL-STD-130 - Identification Marking of US Military Property. MIL-STD-1186 - Cushioning, Anchoring, Bracing, Blocking, and Waterproofing, with Appropriate Test Methods. MIL-STD-45662 - Calibration Systems Requirements. Inspection by Attributes. (Copies of Specifications and Standard
15、s required by contractors in connection-with specific acquisition functi-ons should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Other publications. The following documents form a part of this specification to the extent specified herein. Unless otherwis
16、e specified, the issues of the documents which are DOD adopted shall be those listed in the issue of the DODISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS shall be the issue of the nongovernment documents which is current on the date o
17、f the solicitation. AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B312 ASTM D3951 - Green Strength for Compacted Metal Powder - Commercial Packaging, Practice for. Specimens, Test Method for. (Application for copies should be addressed to American Society for Testing and Materials, 1916 Rac
18、e Street, Philadelphia, PA 19103.). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-KKK-L-370D 25 7777774 00L3b70 5 KKK-L- 3 7 OD 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references cited here
19、in (except for associated detail specifications, specification sheets or MS standards), the text of however, shall supersede applicable laws and regulations unless a specific exemption has been obtained. , this specification shall take precedence. Nothing in this specification, I 3. REQUIREMENTS 3.1
20、 First article. Unless otherwise specified (see 6.2), the contractor shall furnish sample units of each type of lining material (see 1.2.1) which shall be subjected to first article inspection (see 4.4). First article inspection samples, properly marked with identifying information shall be represen
21、tative OE the types to be furnished to the Government. All subsequent lining material delivered to the Government shall conform to these samples . 3.2 Materials. Materials used in the fabrication of linings shall be as specified herein and in accordance with referenced specifications and drawings (s
22、ee 4.8.1). I 3.2.1 Recycled, virgin and reclaimed materials. There are no requirements for the exclusive use of virgin materials. or reclaimed (recovered) materials is acceptable provided that all other requirements of this specification are met (see 4.8.1 and 6.4.1). The use of recycled 3.3 Design
23、and construction. The design and construction of the linings shall be as specified (see 6.2) or in accordance with applicable drawings. Each lining shall be fabricated with or without a backing layer. surfaces shall be fabricated as follows (see 4.8.1 and 4.8.2): Wearing a. Full metallic type: Iron
24、or copper base binder with b. Semimetallic type: Resinous binder with copper. C. Metallic-ceramic type: Copper or iron matrix combined with ceramic ingredients and other friction-modifying additives. friction-modifying fillers. 3.3.1 With backing layer. - Each lining shall consist of two layers desi
25、gnated as a wearing layer and a backing layer (see 3.3.3, 3.3.4 and 4.8.2). 3.3.1.1 Types I and II. The linings of types I and II shall consist of a metallic wearing layer either fused directly and continuously to a metal backing layer, or contain an integral woven, expanded, stabbed, or perforated
26、metal reinforcing member at or near the back surface. 3.3.1.2 Type III. The linings of type III shall consist of a metal-ceramic wearing layer retained by a metal cup, a sintered metal backing layer, or both; or brazed to a flat-steel backing member. 4 - . d) Provided by IHSNot for ResaleNo reproduc
27、tion or networking permitted without license from IHS-,-,-KKK-L-370D 25 W 777997q OOL3671 7 W KKK-L-3 7 OD I a 3.3.2 Without backing layer. For replacement of similar linings used as original equipment, types I and II linings may be furnished without a backing layer (see 4.8.2). 3.3.3 Wearing layer
28、(see 4.8.1). 3.3.3.1 Type I. The wearing layer for type I linings shall be a porous mixture of not less than 65 percent (%) nor more than 90% copper or bronze with materials such as iron, tin, lead, and graphite uniformly distributed through it to obtain the specified physical properties. 6.2), the
29、percentage of free iron shall not exceed 5%. When specified (see 3.3.3.2 -1_ Type II. The wearing layer for type II linings shall be a porous material having not less than 60% nor more than 99% iron with other materials such as tin, lead, silica, and graphite uniformly distributed through it to obta
30、in the specified physical properties. 3.3.3.3 Type III. Type III linings shall have a wearing layer with a metallic content of not less than 40% when measured by weight. 3.3.4 Backing layer. The thickness of the backing layer shall be not less than 25% nor more than 66% of the total facing thickness
31、 for disc-type clutch facings and brake linings; and not less than 12.5% for shoe or band-type clutch facings and brake linings (see 4.8.2). 3.3.4.1 - Type I. The backing layer for type I linings shall be rolled plate or sheet of either copper, steel, or sintered iron. molded reinforcement shall be
32、made of perforated, woven, stabbed, or expanded ferrous or nonferrous metal. The integrally 3.3.4.2 Type II. The backing layer of type II linings shall be rolled plate or sheet of either copper, steel, or sintered iron. molded reinforcement shall be made of perforated, woven, stabbed, or expanded fe
33、rrous or nonferrous metal. The integrally 3.3.4.4 Type III. The backing layer for type III linings shall be rolled plate or sheet of either copper, steel, or sintered iron. 3.3.5 Interchangeability. The linings shall be interchangeable with, and suitable as replacement for, linings supplied as origi
34、nal equipment on commercial vehicles and tractors without requiring alteration of existing clutch or brake parts or any shaping or bending operations of the lining (see 4.8.2). 3.3.6 Application construction. Unless otherwise specified (see 6.2), linings up to and including 18 inches (in) outside di
35、ameter shall be made in a complete ring; linings having an outside diameter greater than 18 inches shall be made in segments. Linings shall also be suitable for use on so-called “cushion type“ clutches where steel springs are used behind the facings to give smoother operation (see 4.8.2). 5 Provided
36、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-KKK-L-370D 25 7777774 OOl13672 7 KKK-L- 3 7 OD 9 3.3.7 Functional construction. When specified (see 6.2), linings for externally contracting and internally expanding band-type clutches shall be furnished in con
37、tinuous strips up to 16 inches in length, of stated width, thickness, and radius of curvature (see 4.8.2). 3.4 Performance. 3.4.1 Ferrous or nonferrous metal backing layer. All backing linings shall show no separation of layers or break in the bond between the backing and wearing layers after being
38、bent through an angle of 90 degrees (O) with the backing layer on the inside of the bend and with the radius of bend sufficiently small to cause cracks and fractures in the wearing layer (see 4.8. 3.1) 3.4.2 Sintered-iron backing layer. All linings shall show no separation of layers or break in the
39、bond between the backing and wearing layers after being chiseled into the wearing layer at an angle of approximately 30“ (see 4.8.3.2). 3.4.3 Wearing layer transverse rupture. The linings of types I and II, without backing, shall have a transverse rupture strength of not less than 4000 pounds per sq
40、uare inch (psi) when tested for green strength in accordance with ASTM B312 (see 4.8.3.3). 3.4.4 Coefficient of friction. Coefficient of friction of the wearing layer of the lining against smooth cast iron shall be as specified in 3.4.4.1 and 3.4.4.2 at pressures from 20 to 200 psi and temperatures
41、from O to 900 degrees Fahrenheit (OF) (see 4.8.3.4). 3.4.4.1 Kinetic. The kinetic (sliding) coefficient of friction shall be not less than 0.22 at surface speeds of 4000 to 6000 feet per minute (fpm) and no less than 0.25 at surface speeds of less than 3000 fpm. Coefficient at surface speeds between
42、 3000 and 4000 fpm and over 6000 fpm shall be at comparable ratios (see 4.8.3.4.1). 3.4.4.2 Static. The static coefficient of friction shall be no less than 0.30 (see 4.8.3.4.2). 3.5 Hardness. The Brinell hardness number of the wearing layer, using a 10millimeter (mm) ball with a 500-kilogram (kg) l
43、oad, at 72OF and a 30-second (sec) test duration shall be not less than that specified in table I for the wearing layer thickness (see 4.8.4). TABLE I. Wearing layer hardness. - Minimum Brinell 1/16 and less Over 1/16 to 3/32 Over 3/32 20 17 12 c 6 _ _- _L_- -. Provided by IHSNot for ResaleNo reprod
44、uction or networking permitted without license from IHS-,-,-e- - Ounces per cubic inch minimum maximum Type I 2.5 4. O Type II 1.5 3 b c , KKK-L-370D 25 m 9979774 0033673 O m KKK-L-3 7 OD 3.6 Density. The density, weight per cubic inch, of the wearing layer shall be as specified in table II (see 4.8
45、.5). TABLE II. Wearing density. 3.7 Identification markings. The identification marking shall be in accordance with MIL-STD-130 and clutch lining shall be marked with a number, letter, or symbol which will adequately identify the manufacturer and material. Segments of combination sets shall be ident
46、ified for the clutches or brakes on which they are to be used. Identification marks shall appear on every piece of lining and on each piece in a set. The same identification symbol shall apply to linings of different sizes, widths and thickness. The material of all linings submitted under the same i
47、dentification mark shall have the same properties, as closely as the best commercial practices permit (see 4.8.2). 3.7.1 Special military marking. For Department of Defense purchases the specification number and type number of the lining shall also be included in the identification markings. 3.8 Wor
48、kmanship. Workmanship shall be of a quality that meet all specified requirements and shall assure that linings are free of defects that would affect serviceability, interchangeability, and performance (see 4.8.2). 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise sp
49、ecified in the Except as contract or purchase order (see 6.2), the contractor is responsible for the performance of all inspection requirements as specified herein. otherwise specified in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. the inspections set forth in the specification
