1、Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any otherdata that may improve this document should be sent to: Defense Supply Center Columbus (Attn:DSCC-VAI), 3990 East Broad Street, Columbus, Ohio 43213-5000.FSC 4910I NCH-POUNDA-A-5955218 July 2001SUPERSEDINGOO
2、-G-686C22 February 1985COMMERCIAL ITEM DESCRIPTIONGRINDING MACHINES, VALVE FACEThe General Services Administration has authorized the use of thiscommercial item description (CID) for all federal agencies.1. SCOPE. This (CID) covers grinding machines used for reconditioning intake and exhaustvalves o
3、f internal combustion engines by wet grinding.2. CLASSIFICATION.2.1 Styles . The grinding machines shall be of the following styles:Style A - For bench mounting.Style B - For cabinet mounting. Cabinet available as an optional accessory.3. SALIENT CHARACTERISTICS.3.1 Design . The grinding machine sha
4、ll be designed specifically for regrinding the faces ofintake and exhaust valves of internal combustion engines. Additionally, accessories for therelated operations of valve butt and push rod grinding (flat face only), rocker arm grinding and thegrinding of tappets (flat face only), and adjustable s
5、crew faces must be available for each grindingmachine.3.2 Capacities and accuracies . The grinding machine must be capable of grinding valves to thefollowing specifications;Stem and head diameter(inches)Angular capacity(degrees)Accuracy(degrees)Stem - 9/32 to 11/16,Head - 1 to 4 15 to 45To within on
6、e degree lessthan the indicated angle andwithin one-half degree persetting3.3 Chuck(s) . The chuck(s) or collets shall be of the self-centering, quick-opening, quick-closingtype and shall provide the accuracy and capacity as specified above. The gripping or releasingaction shall be controlled by a h
7、andwheel, lever, or air.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5955223.4 Coolant system . Each grinding machine shall be provided with a coolant system, which shallbe an integral part of the machine. The coolant system shall consist of a
8、 storage tank thatpermits the settling out of grinding residue, a pump, piping, nozzles, valves, and channelsnecessary to deliver and adjust the flow of coolant to the points of contact between the work andthe grinding wheel(s) and return the coolant to the storage tank. The storage tank must beremo
9、vable for cleaning.3.5 Grinding wheel(s) . The grinding machine shall be provided with, or be available for purchasewith, two types of grinding wheels: one for the grinding of the stellite valve faces and one for thechamfering and squaring of the valve stem ends. Wheel hoods or guards shall be provi
10、ded.3.6 Grinding wheel dresser . The grinding machine shall be equipped with a grinding wheeldressing fixture and a diamond dressing stone designed to perform all necessary truing anddressing operations.3.7 Rocker-arm grinding attachment . The rocker-arm grinding attachment shall be provided orbe av
11、ailable for purchase as an optional item or accessory with each grinding machine. Thisattachment shall be designed to facilitate refinishing the radii of the rocker arms of engines havingvalves within the capacity of the grinding machine.3.8 Valve stem grinding attachment . A valve stem grinding att
12、achment shall be provided or beavailable for purchase as an optional item or accessory with each grinding machine. Thisattachment shall enable the grinding of valve butts, flat-faced push rods, flat-faced tappets, andadjustable screw faces.3.9 Light fixture(s) . The grinding machine shall be equippe
13、d with a shaded work light(s). Thework light(s) position shall be adjustable to the extent necessary to provide illumination for allgrinding operations.3.10 Motors . All motors shall be continuous duty type. The grinding wheel drive motor shallhave ball bearings. Splash guards or other means shall b
14、e provided to preclude entry of coolantinto the motor.3.10.1 Available voltages . Grinding machines shall be capable of operating on at least one ofthe following voltages:115 - 120 volt, 60 Hz, single phase220 - 240 volt, 60 Hz, single phase220 - 240 volt, 60 Hz, three phase.220 - 240 volt, 50 Hz, s
15、ingle pha se.3.11 Mounting . Grinding machines shall be capable of being mounted and used on either a workbench or an optional mounting cabinet (see 2.1).3.12 Operating manual(s) . Each machine shall include a manual(s) that depicts the operation ofthe grinding machine. It shall be in sufficient det
16、ail for typical maintenance technicians to safelyand efficiently operate the equipment.3.13 Maintainability . Design and assembly of the grinding machine and the placement ofadjusting features shall ensure that the operational maintenance capability will be reduced to thesimplest form of procedures
17、requiring a minimum of skills and common tools. Instructions for thedisassembly, repair, assembly, and adjustment shall be clear, concise and definitive in amanual(s) supplied with each grinding machine. Parts shall be clearly identified in an illustrationthat depicts part number, description, and q
18、uantity per assembly and reflects the relationship ofan individual part to the complete assembly.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5955233.14 Safety devices . Each grinding machine shall be equipped with the necessary safetydevices
19、found on like commercial items.3.15 Material . Materials shall be of a quality commensurate with commercial practice within theproducing industry and shall be suitable for the intended purpose and use. Materials shall be freefrom defects that would adversely affect the performance or maintainability
20、 of the grindingmachine. When dissimilar metals are used in contact with each other, suitable protection againstgalvanic corrosion shall be applied in accordance with existing commercial practices.3.16 Workmanship . The grinding machines shall be fabricated and finished using commerciallyacceptable
21、workmanship standards.4. REGULATORY REQUIREMENTS. The offeror/contractor is encouraged to use recoveredmaterials to the maximum extent practicable, in accordance with paragraph 23.403 of the FederalAcquisition Regulation (FAR).5. PRODUCT CONFORMANCE.5.1 Product Conformance . The valve grinding machi
22、nes provided shall meet the salientcharacteristics of this CID; conform to the producers own drawings, specifications, standards andquality 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.
23、2 Market Acceptability . The grinding machines offered must have been sold to the governmentor commercial market for a minimum of one year.6. PACKAGING. Preservation, packing, and marking shall be as specified in the contract ororder.7. NOTES.7.1 Intended use . The grinding machines covered by the C
24、ID are intended for use inreconditioning intake and exhaust valves and other valve train components; e.g. rocker arms,push rods, tappets and adjustable screw faces of internal combustion engines.7.2 Source of Documents .7.2.1 The Federal Acquisition Regulation (FAR) may be obtained from the Superint
25、endent ofDocuments, US Government Print Office, Washington, D.C. 20402.7.3 Part or Identification Number (PIN) . The following part or identification numbering procedureis for government purposes and does not constitute a requirement for the contractor.AA59552 - A 1 A 1A = Bench MountB = Cabinet Mou
26、nt1 = 110 Volts AC2 = 220 Volts ACA = 60 HzB = 50 Hz1 = Single Phase2 = Three PhaseProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-5955247.4 Ordering data . Acquisition documents must specify the following:a. Number, title and date of this CID.b.
27、 Style required (A or B) (see 2.1 and 7.3).c. Operating voltage required (see 3.10.1 and 7.3).d. Available accessories and options required.e. Quantity ordered.f. Preservation, packing, and marking requirements (see 6.1).7.4 Key words .ValveRefaceGrindingIntakeExhaustRocker armMILITARY INTERESTS: CIVIL AGENCY COORDINATING ACTIVITY:Custodians: GSA FSSArmy ARAir Force 99 Preparing activity:DLA CC DLA CCReview activities: (Project 4910-0828)Army ATAir Force - 82Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
