1、(INCH-POUND I MIL-C-52712B(ME) 24 August 1990 SUPERSEDING MIL-C-52712A(ME) 16 August 1982 MILITARY SPECIFICATION CONVEYOR, BELT, PORTABLE, ELECTRIC CASTER MOUNTED This specification is approved for use within the USA Belvoir Research, Development and Engineering Center, Department of the Army, and i
2、s available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a portable, electric motor driven conveyor equipped with a flat belt and caster mounts. 2. APPLICABLE DOCUMENTS 2.1 Government documents 2.1.1 SPeci fi cat ions and s banda
3、rdS. The fol 1 owing speci fi cat i ons anc standards form a part of this document to the extent specified herein. otherwise specified, the issues of these documents are those listed in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cite
4、d in the solicitation (see 6.2). Unless SPECIFICATIONS FEDERAL QQ-S-781 - Strapping, Steel and Seals. TT-P-664 - Primer Coating, Synthetic, Rust-Inhi biting, Lacquer- Resisting. TT-V- 12 1 - Varnish, Spar, Water Resisting. PPP-B-601 - Boxes , Wood , Nai 1 ed and Lock-Corner. PPP-P-40 - Packaging and
5、 Packing of Hand Tools. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: USA Belvoir Research, Development, and Engineering Center, ATTN: STRBE-TSE, Fort Belvoir, VA 22060-5606 by using the self-
6、addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or bv letter. AMSC NIA DISTRIBUTION STATEMENT A. Approved for pub1 ic release, distri but FSC 3910 on is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted withou
7、t license from IHS-,-,-MI L ITARY MIL-P-116 MI L-B- 12 1 MI L-P-514 MI L-T-704 MIL-T-22085 MIL-B-26195 STANDARDS FED ERAL FED-STD-595 MILITARY MIL-STD-105 MIL-STD-129 MIL-STD-209 MIL-STD-889 MIL-STD-1186 MI L-STD- 1190 MI L-STD- 1366 - Preservation , Methods of. - Barrier Materi al , Greaseproofed,
8、Waterproofed, - Plates, Identification, Instruction and Marking, - Treatment and Painting of Material. - Tape, Pressure-Sensitive, Adhesive, Preservation and - BOX, Wood-cleated, Skidded, Load-bearing Base. F1 exi bl e. B1 ank. Seal i ng . - Colors. - Sampl i ng Procedures and Tab1 es for Inspecti o
9、n by Attributes. - Marking for Shipment and Storage. - Slinging and Tiedown Provisions for Lifting and Tying Down Military Equipment. . - Di ssimi 1 ar Metal s. - Cushioning, Anchoring, Bracing, Blocking and Waterproofing; with Appropriate Test Methods. - Minimum Guidelines For Level C Preservation,
10、 Packing and Marking. - Materiel Transportation System Dimensional and Weight Constraints, Definition of. (Unless otherwise i dicated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue,
11、 Philadelphia, PA 19120-5094.) 2.2 Non-Government Dub1 ications. The following document(s) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation.
12、 Unless otherwise specified, the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) Safety Standards for Conveyors and Related Equipment (ANSI B 20.1). (Application for copies should be addres
13、sed to the American National Standards Insti tute, 1430 Broadway, New York, NY 10018.) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI L-C-52712B (ME) AMERICAN SOCIETY OF MECHANICAL ENGINEERS (ASME) Boiler and Pressure Vessel Code, Section IX, W
14、elding and Brazing Qualification. (Application for copies should be addressed to the American Society of AMERICAN WELDING SOC I ETY (AWS) Mechanical Engineers, 345 East 47th Street, New York, NY 10017.) Dl.1 - Structural Welding Code - Steel D1.3 - Structural Welding Code - Sheet Steel (Application
15、for copies should be addressed to the American Welding Society, CASTER AND FLOOR TRUCK MANUFACTURERS ASSOCIATION (CFTMA) 550 N.W. LeJune Road, P.O. Box 351040, Miami, FL 33135.) Industrial Wheel Standard, Manually Operated or Power Drawn at No More Than 3 MPH Wheel Types. (Application for copies sho
16、uld be addressed to the Caster and Floor Truck Manufacturers Association, 1717 Howard Street, Evanston, IL 60202.) SOCIETY OF AUTOMOTIVE ENGINEERS, INC (SAE) SAE Handbook (Application for copies should be addressed to the Society of Automotive Engineers, Inc. , 400 Commonwealth Drive, Warrendale, PA
17、 15096.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. also may be available in or through libraries or other informational servi ces. ) These documents 2.3 Order of precedence. In the event of a conflict betw
18、een the text of this document and the references cited herein, (except for re1 ated associated detail specifications, specification sheets or MS standards), the text of this document takes precedence. Nothing in this document , however, supersedes applicable laws and regulations unless a specific ex
19、emption has been obtained, 3. REQUIREMENTS 3.1 DescriDtion. The portable conveyor is a continuous belt type with steel sl ider pl ates ,. el ectri c-motor-driven i tem used to move materi al s horizontally or up an incline. a belt width of 18 inches and shall weigh not more than 500 pounds, than 45
20、pounds per linear foot when the conveyor is level and not less than 3.1.1 Dimensions. The conveyor shall have a nominal length of 19 feet with 3.2 CaDacitv and speed. The conveyor shall have a capacity of not less 0 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without licen
21、se from IHS-,-,-c MIL-C-52712B 37 7979706 044615b 8 m MI L-C-527128 (ME) 300 pounds total when the conveyor is operated at an angle of 30 degrees. Belt speed shall be not less than 100 feet per minute (FPM) . 3.2 Standard product. Except as otherwise specified herein, the conveyor belt shall be the
22、standard product of the contractor. The conveyor belt shall be new and unused except to the extent required to perform the tests specified herein . 3.2.1 Certification of commercial item. When specified (see 6.2), the contractor shall certify that the product offered to the Government meets the sali
23、ent characteristics of this conveyor belt and that the product conforms to the contractors own drawings, specifications, standards, and quality assurance practices and is the same product as the manufacturers current product which is offered by the contractor in the commercial marketplace for at lea
24、st one year preceding the solicitation. right to require proof of such conformance prior to first delivery and thereafter as may be otherwise provided for under the provisions of the contract. The Government reserves the 3.2.2 Small business. A small business that cannot meet the certification- of-c
25、ommercial-item requirement of this document, may make an offer under the solicitation and, if such small business is the apparent successful offeror, the Government may require the small business to submit a conveyor belt. such conveyor belt may be evaluated for the solicitation if time to contract
26、award permits. Such evaluation would be to determine conformance to all requirements of this name of item and to determine equivalency to conveyor belt available in the commercial marketplace in the areas of performance durability, human factors engineering and safety. It should be noted that sample
27、s are not required unless specifically requested by the contracting officer. Note: The Government may elect not to evaluate a sample from an apparent low bidder for award in an ongoing solicitation if a determination of urgency is made by the contracting officer. evaluated prior to future solicitati
28、on for comparable items. evaluation establishes equivalency with the commercial items, a letter of equivalency will be issued by the contracting officer for use in response to future solicitations for conveyor belts, Any The sample would then be If the 3.3 First article. When specified (see 6.2), a
29、sample shall be subjected to first article inspection (see 6.2) in accordance with 4.3. 3.4 Material. Material shall be as specified herein. Used, rebuilt or remanufactured components, pieces, and parts shall not be incorporated in the conveyor. Federal , Military or National Technical Society, Asso
30、ciation or Institute specification or standard. Materials not definitely specified shall be in accordance with a 3.4.1 Material deterioration prevention and control. The conveyor shall be fabricated from compatible materials, inherently corrosion resistant or treated to provide protection against th
31、e various forms of corrosion and deterioration that may be encountered in any of the applicable operating and storage environments to which the conveyor may be exposed. 3.4.2 Dissimilar metals. Dissimilar metals shall not be used in intimate contact with each other unless protected against galvanic
32、corrosion. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Dissimilar metals and methods of protection are defined and detailed in MIL- STD-889. 3.4.3 Identification of materials and finishes. The contractor shall identify the specific material, ma
33、terial finish or treatment for use with component and subcomponent, and shall make information avail able upon request to the contracting officer or designated representative. Drain holes shall be provided to prevent collection or entrapment of water or unwanted fluids. 3.4.4 Drain holes. 3.5 Safetv
34、. The conveyors shall incorporate all safety features and design characteristics of ANSI Standard B20.1. An anti-runway brake or back to stop devi ce shall be provided to prevent personnel in jury. Emergency stop devi ces shall be provided at all operator locations. All rotating, reciprocating, or h
35、igh temperature parts which are located as to be hazardous to operating or maintenance personnel shall be provided with guards. 3.6 Frame. The conveyor frame shall be aluminum. Tubular handles shall be provided near the head and tail end to assist in moving and positioning the conveyor. maximum diam
36、eter of 1.5 inches. Other handle dimensions shall be in accordance with the preferred dimensions of SAE 5185, figure 3. The casters shall be bolted to the conveyor frame, two near the head end and two near the tail end. with foot operated brakes. shall accommodate the specified wheel. fittings. The
37、handles shall have a minimum diameter of 0.75 inches and a 3.6.1 Mounting. Each conveyor section shall be mounted on four casters. 3.6.2 Casters. Casters shall be heavy duty, swivel plate, scaffold type They shall be equipped with ball bearings and Swivels shall be provided with grease 3.6.3 Caster
38、wheels. Caster wheels shall be rubber tired and a minimum of 6 inches in diameter by 2 inches rim width. operational load ratings of the CFTMA standard for industrial wheels. wheels shall be mounted on ball or roller bearings. They shall conform to the The 3.7 Pulleys, idlers and rollers. 3.7.1 moun
39、ted. adjuster with positive locking means shall be provided on the head and tail pul 1 eys. Pulleys. Head pulley, tail pulley and drive pulley shall be bearing Bearings shall be the lubricated for life type. A screw type 3.7.2 3.7.3 Take-up rollers. Take-up rollers shall be bearing mounted, Bearings
40、 Id1 er rol 1 ers. Id1 er rol 1 ers shall be bearing mounted. shall be the lubricated for life type. shall be the lubricated for life type. A screw type adjuster with positive locking means shall be provided. provided. Bearings 3.7.4 Convevor belt. A rubber, rough top type, conveyor belt shall be It
41、 shall be an 18 inch wide continuous belt with alligator type 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I . MIL-C-527I2B 37 m 77947Ob 044bI5 I 1 MI L-C-52712B (ME) lacing. Means for adjusting belt tracking shall be provided. Conveyor belts fu
42、rnished to the Government shall be not more than 12 months old from date of cure of the rubber to date of acceptance by the Government. 3.8 Drive train. The drive train shall be gear or roller type chain and sprocket. When chain drive is furnished, a spring loaded chain tensioner and idler sprocket
43、shall be provided to maintain constant chain tension, 3.9 Electrical eauiDment. The conveyor shall be equipped with an electric motor, a system of electric wiring and controls and a power supply cable. It shall have a magnetic start and a push button start-stop switch. shall be wired for 230 VAC, 60
44、 hertz, single phase power. The conveyor 3.9.1 Electric motor. The conveyor belt shall be driven by an electric motor rated for 1 horsepower minimum, 115/230 volts, 60 hertz, single phase AC. 3.9.2 Starter. Starter shall be of the magnetic reversing type with manual reset over1 oad re1 ay. 3.9.3 Con
45、trols. Push button start and stop controls shall be provided near the head end and the tail end of the conveyor. have means for locking in the stop position. forward switch shall be mounted near the tail end, The controls shall be labeled as to function and with the basic information needed to prope
46、rly actuate the control. The characters on the label shall have a height of 0.18 inches, a stroke width of 0.025 to 0.03 inches, a width of 0.11 inches (except for My W, and I which have widths of 0.14, 0.14 and 0.03 inches respectively). The minimum space between words on the label shall be 0.11 in
47、ches and between characters shall be 0.03 inches. The pushbutton controls shall have a diameter of 0.375 to 1.00 inches, an actuating force of 10 to 40 oz, and a minimum spacing of 2 inches, The buttons shall be provided with a channel or cover guard to prevent accidental actuation. Both stop push b
48、uttons shall In addition, a reverse-stop- 3.9.4 Power cable. A 40 foot, No. 12 AWG, three wire, type S.O. electrical cord with a three prong male connector shall be provided and shall be connected to the starter. with the male connector shall be supplied with each conveyor. 3.10 Lubrication. Lubrica
49、tion means shall be provided for all moving parts that require lubrication. The types of lubricants shall be selected from, and be in accordance with, SAE 5754. All initial fills of lubricants shall be limited to the types approved by the component manufacturers and compatible with military equivalents. Grease lube fittings shall conform to SAE 5534. A mating three wire female receptacle compatible 3.11 Identification marking. Each conveyor section shall be identified with
