1、Designation: E784 89 (Reapproved 2011)Standard Specification forClamps, Utility, Laboratory, and Holders, Buret and Clamp1This standard is issued under the fixed designation E784; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers clamps and clamp holders foruse in securing laboratory apparatus to support stands.
3、1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.2. Referenced Documents2.1 ASTM Standards:2A48/A48M Specification for Gray Iron CastingsA276 Specification for Stainless Steel Bars and ShapesB30 Specification for Copper Allo
4、ys in Ingot FormB85 Specification for Aluminum-Alloy Die CastingsB86 Specification for Zinc and Zinc-Aluminum (ZA) AlloyFoundry and Die CastingsB139/B139M Specification for Phosphor Bronze Rod, Bar,and ShapesB247 Specification for Aluminum and Aluminum-AlloyDie Forgings, Hand Forgings, and Rolled Ri
5、ng Forgings2.2 Federal Specifications:3UU-P-553 Paper, Wrapping, TissuePPP-B-566 Boxes, Folding, PaperPPP-B-601 Box, Wood, Cleated-PlywoodPPP-B-621 Box, Wood, Nailed and Lock CornerPPP-B-636 Box, Shipping, FiberboardPPP-B-676 Boxes, SetupPPP-F-320 Fiberboard, Corrugated and Solid, Sheet Stock(Contai
6、ner Grade) and Cut Shapes2.3 Federal Standard:3Fed. Std. No. 123 Marking for Shipment (Civil Agencies)2.4 Military Specifications:3MIL-P-116 Methods of Preservation-PackagingMIL-STD-1188 Commercial Packaging of Supplies andEquipment2.5 Military Standard:3MIL-STD-105 Sampling Procedures and Tables fo
7、r Inspec-tion by Attributes3. Classification3.1 Types, Sizes, and ClassesThe clamp and clamp hold-ers covered by this specification shall be of the types, classes,and sizes as specified in 3.2-3.6 (see S3.1).3.2 Type IClamp holders:3.2.1 Class 1Fixed jaw.3.2.2 Class 2Swivel jaw.3.2.3 Class 3All posi
8、tion jaw.3.3 Type IITwo-pronged clamps:3.3.1 Class 1Fixed, with holder.3.3.1.1 Size 1Small clamp expands to 38 mm (112 in.).3.3.1.2 Size 2Large clamp expands to 64 mm (212 in.).3.3.2 Class 2Swivel with holder.3.3.2.1 Size 1Small clamp expands to 38 mm (112 in.).3.3.2.2 Size 2Large clamp expands to 6
9、4 mm (212 in.).3.3.3 Class 3Swivel, duplex.3.4 Type IIIExtension clamps:3.4.1 Class 1Two-pronged.3.4.1.1 Size 1Small clamp expands to 38 mm (112 in.).3.4.1.2 Size 2Large clamp expands to 64 mm (212 in.).3.4.2 Class 2Three-pronged.3.4.2.1 Size 1Small clamp expands to 25 mm (1 in.).3.4.2.2 Size 2Large
10、 clamp expands to 98 mm (378 in.).3.4.3 Class 3Universal.3.4.3.1 Size 1Small clamp expands to 51 mm (2 in.).3.4.3.2 Size 2Large clamp expands to 76 mm (3 in.).3.5 Type IVThermometer clamp, swivel with holder.3.6 Type VClamp, double buret holder.4. Materials4.1 Base MetalClamps and clamp holders shal
11、l be manu-factured from aluminum-base alloy, zinc-base alloy, or castiron. Aluminum base alloy metal shall conform to alloy1This specification is under the jurisdiction of ASTM Committee E41 onLaboratory Apparatus and is the direct responsibility of Subcommittee E41.01 onApparatus.Current edition ap
12、proved Oct. 1, 2011. Published November 2011. Originallyapproved in 1981. Last previous edition approved in 2005 as E784 89 (2005)1.DOI: 10.1520/E0784-89R11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of AS
13、TMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Naval Publications and Forms Center, 5801 Tabor Ave.,Philadelphia, PA 19120.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United Stat
14、es.number A380 of Specification B85. Zinc-base alloy shallconform to AG 40A of Specification B86. Cast iron shallconform to Specification A48/A48M, Class 20.4.2 Metal FittingsFittings such as screws, nuts, and rivetsfor clamps and clamp holders shall be forged aluminum orchemical-resistant alloy for
15、 either aluminum-base alloy orzinc-base alloy clamps and clamp holders. In addition zinc-base alloy clamps and clamp holders may have copper alloyfittings. Forged aluminum fittings shall conform in composi-tion to 2014 of Specification B247. Copper alloy fittings shallconform to composition to Speci
16、fication B30.4.3 SpringsComponent springs of clamps shall be phos-phor bronze or corrosion-resistant steel. Phosphor bronze shallconform to Composition C51000 of Specification B139/B139M. Corrosion-resistant steel shall conform to Class 202 or302 of Specification A276.4.4 SleevesComponent sleeves of
17、 clamps may be rubber,plastic, fiber glass, non-hazardous minerals, or replaceableplastic. Unless otherwise specified by the procuring agency,rubber sleeves shall be supplied with clamps (see S2.1).4.4.1 RubberRubber for sleeves shall conform to Type R,class optional of MIL-STD-147.4.4.2 PlasticWhen
18、 plastic sleeves are specified, they shallbe bonded firmly to the clamp jaw. The plastic sleeve shall beformed by hot dipping the clamp jaw in a vinyl plastisolconforming to Type II of MIL-P-20689.4.4.3 MineralWhen mineral sleeves are specified, theyshall be nonraveling and woven from high-quality m
19、ineralyarn.4.4.4 Fiber GlassWhen fiber glass sleeves are specified,they shall be nonraveling and woven.4.4.5 Replaceable PlasticWhen replaceable plasticsleeves are specified, they shall be durable enough not to breakdown in sand blasting, shot blasting, painting or coatingoperations. Application sho
20、uld be quick and the resulting fit besnug and conforming.5. Dimensions, Mass, and Permissible Variations5.1 Fitting ThreadsThumbscrews, wingnuts, and holdersshall be threaded in accordance with Screw Thread Standardsfor Federal Services, Unified National Coarse Thread Series.45.1.1 Metric threads ca
21、n be used if specified.5.2 DimensionsThe dimensions and tolerances shall be asshown in Table 1.5.3 ConstructionThe illustrations shown in Figs. 1-5 arefor the convenience of identification and shall not precludeclamps and clamp holders otherwise in accordance with thisspecification.5.3.1 Type IClass
22、 1 clamp holders shall be of one-piececonstruction, consisting of two V-grooved areas at right anglesto each other. Class 2 clamp holders shall consist of twoseparate V-grooved sections freely movable through an angleof 360 in parallel planes and position fixed by means of a setscrew. Class 3 clamp
23、holders shall consist of two V-groovedareas connected to each other by a double plate joint whichkeeps the V-grooved areas in planes permanently set at 90 toeach other. The plate joints have friction disks which alloweach V-grooved area full movement through an angle of 360within each plane. The V-g
24、rooved areas of each class are fittedwith thumbscrews for attachment to support rods or anchoringclamp shafts. All clamp holders shall be capable of directattachment to rods up to 13 mm (12 in.) in diameter without thenecessity of passing the clamp holders over the ends of therods. All clamp holders
25、 shall be capable of attachment to rodsup to 17 mm (1116 in.) in diameter by passing the clamp holderover the ends of the rods.5.3.2 Type IIClass 1 and Class 2 two-pronged clampsshall consist of a V-grooved holder fitted with thumbscrews forattachment to support rods and a spring type clamp. The cla
26、mpshall have two jaws that spread under spring tension and shall4NIST Handbook 100, National Bureau of Standards, is available from theNational Technical Information Service, Port Royal Road, Springfield, VA 21161.TABLE 1 Dimensions and Tolerances for Clamps and Clamp HoldersClassificationMaximum di
27、ameter of opening,mm (in.)Overall length,mm (in.)Tolerance,6mm (6 in.)Type of JawType Class Size Clamp Holder Clamp HolderI 1 . .1116 (17) 127 (5) 6 (14) . VI 2 . .1116 152 (6) 6 (14) . VI 3 . .1116 127 (5) 3 (18) . VII 1 1 38.1 (112)1116 178 (7) 6 (14) round VII 1 2 63.5 (212)1116 178 (7) 6 (14) ro
28、und VII 2 1 38.1 (112)1116 178 (7) 6 (14) round VII 2 2 63.5 (212)1116 191 (712)614) round VII 3 . 38.1 and 63.5 . 216 (812 (14) round .(112 and 212)AIII 1 1 38.1 (112) . 203 (8) 6 (14) round .III 1 2 63.5 (212) . 228 (9) 6 (14) round .III 2 1 25.4 (1) . 152 (6) 6 (14) prong .III 2 2 (378) . 267 (10
29、12)1312) prong .III 3 1 50.8 (2) . 203 (8) 6 (14) prong .III 3 2 76.2 (3) . 242 (912)614) prong .IV . . 3 (18)to13(12)1116 152 (6) 6 (14) clip VV . .B 1116 254 (10) 6 (14) finger VAClamp on each end, one small and one large sized.BClamp shall be capable of holding micro to 100-mL size burets, 5 to 2
30、0 mm in diameter.E784 89 (2011)2be adjustable to the maximum opening shown in Table 1 bymeans of a single screw and wingnut. Class 1 two-prongedclamps shall be of one-piece construction. Class 2 two-prongedclamps shall be of two-piece construction capable of beingextended approximately 25 mm (1 in.)
31、. The clamp section shallbe adjustable through 360 and position-fixed by means of athumbscrew or locknut on the extension shaft. Class 3 two-pronged clamps shall consist of 2 two-pronged clamps con-nected by means of a threaded shaft capable of being extendedapproximately 25 mm (1 in.), adjustable t
32、hrough 360, andposition-fixed by means of a locknut on the extension shaft.5.3.3 Type IIIExtension clamps shall consist of a spring-type clamp fixed to an extension arm for insertion andpositioning in a Type I clamp holder. Class 1 extension clampshall have a two-pronged jaw that spreads under sprin
33、g tensionand be adjustable to the maximum opening shown in Table 1Class 1 Class 2Class 3FIG. 1 Type IClamp HoldersClass 1 Class 2Class 3FIG. 2 Type IITwo-Pronged ClampsE784 89 (2011)3by means of a single screw and wingnut. Class 2 extensionclamp shall have a two-pronged jaw and a one-pronged jaw,eac
34、h independently adjusted by means of a separate thumb-screw. The one-pronged jaw shall be so located that it isequidistant from both prongs of the two-pronged jaw. Class 3extension clamp shall be three-pronged (of similar constructionto Class 2) or four-pronged (two two-pronged jaws, one jawbeing sm
35、aller than the other so that the smaller jaw passesbetween the prongs of the larger jaw) fitted to the extensionarms by means of a thread swivel and wingnut for positioningthe clamp at any angle.5.3.4 Type IVThermometer clamps shall consist of aV-grooved holder and a spring clip having a wingnut for
36、tightening the thermometer in the clip. The holder and clipshall be connected by means of a threaded shaft capable ofbeing extended approximately 25 mm (1 in.), adjustablethrough 350, and position-fixed by means of a locknut on theextension shaft.5.3.5 Type VClamps, double buret holder shall be con-
37、structed of a one-piece H-frame with the vertical arms curvedoutward. The ends of each arm shall have a suitable curvedfinger at right angles to the frame. Two spring-actuatedgripping arms, each with a suitable curved finger at right angleto the arm, shall be attached to each side of H-frame andalig
38、ned with the curved frame arms to form double clamps forsupporting two burets ranging in diameter from 5 to 20 mm.Burets shall be firmly gripped at two points by the clamps thusformed without sideslipping or obscuring any of the buretgraduations. Insertion, adjust-ment, and removal of burets shallbe
39、 accomplished by applying pressure on the spring-actuatedarms; each side of the buret holder will operate separately. Theburet holder shall be fitted with a setscrew, centrally located,for fastening the holder to the support rod.6. Workmanship6.1 All clamp and clamp holders shall be free of imperfec
40、-tions that affect their serviceability. All parts shall be con-structed of suitable gauge material to prevent deformationwhen used extensively in the laboratory. Edges and cornersshall be free of burrs and fins.7. Keywords7.1 clamps; holders; laboratory; utilityClass 1Class 2FIG. 3 Type IIIExtensio
41、n ClampsFIG. 4 Type IVThermometer ClampE784 89 (2011)4SUPPLEMENTARY REQUIREMENTSThe following supplementary requirements are binding when this specification is used by theDepartment of Defense and the Federal Government for the procurement of clamps.S1. SamplingS1.1 Sampling shall be conducted in ac
42、cordance with MIL-STD-105.S2. Ordering InformationS2.1 Procurement documents should specify the following:S2.1.1 Title, number, and date of this ASTM specification,S2.1.2 Level of packaging and packing required,S2.1.3 Type, class, and size required,S2.1.4 If clamps desired with sleeves other than ru
43、bber, andS2.1.5 Number of unit packages per intermediate packageand number of clamps or clamp holders per pack required.S2.2 Suppliers ResponsibilityThe supplier is responsiblefor the performance of all inspection requirements as specifiedherein. Except as otherwise specified, the supplier may use h
44、isown or any other inspection facilities and services acceptableto the government. Inspection records of the examination andtests shall be kept complete and available to the government asspecified in the contract or order. The government reserves theright to perform any of the inspections set forth
45、in thespecification where such inspections are deemed necessary toensure that supplies and services conform to prescribed re-quirements.S3. Lotting and SamplingS3.1 A lot shall consist of those clamp and clamp holders ofthe same type, same class, and same size made by onemanufacturer and submitted f
46、or delivery at one time.S3.2 Sampling shall be conducted in accordance with S1.1.S4. InspectionS4.1 ExaminationSamples of clamps or clamp holdersand Level A and examination of packaging for deliveryrequirements shall be examined in accordance with the classi-fication of defects and with MIL-STD-105.
47、S4.2 Classification of defects shall be in accordance withTable S1 and Table S2.S5. Rejection CriteriaS5.1 The sample must pass all the physical and chemicalrequirements when tested as specified to be accepted. Any testfailure will result in the rejection of the lot.S6. CertificationS6.1 Compliance
48、with all stipulations of this specificationregarding fill, closure, marking, and other requirements notinvolving tests will be certified by the supplier.S7. MarkingS7.1 Civil AgenciesIn addition to any special markingrequired by the contract or order, unit and intermediatepackages and exterior shipp
49、ing containers shall be marked inaccordance with Fed. Std. No. 123.S7.2 Military AgenciesIn addition to any special markingrequired by the contract or order, unit and intermediatepackages and exterior shipping containers shall be marked inaccordance with MIL-STD-129. All containers shall bear thename of the item, national stock number, and quantity con-tained therein.FIG. 5 Type VClamp, Double Buret HolderTABLE S1 Classification of Defects of Clamps or Clamp HoldersCategor
