ASME B107.8:2003 pdf free download ADJUSTABLE WRENCHES
1 sCOPE
This Standard provides performance and safetyrequirements for open-end adjustable wrenches,withrack and worm adjustment, generally used on both hex-agonal and square bolts and nuts.Inclusion of dimen-sional data in this Standard is not intended to imply
that all products described herein are stock productionsizes.Consumers are requested to consult with manufac-turers concerning lists of production sizes.
2 CLASSIFICATIONS
Adjustable wrenches shall be of the following types:Type I: standard openings
Type II: wide openings
3 NORMATIVE REFERENCES
The following documents form a part of this Standardto the extent specified herein.At the time of publication,
the editions indicated are valid.All standards are subjectto revision, and parties to agreements based on this
Standard are encouraged to investigate the possibilityof applying the most recent editions of the publications
listed below.
ASTM B 117-1997,Standard Practice for Operating SaltSpray (Fog) Apparatus
AsTM B 571-1997,Standard Practice for QualitativeAdhesion Testing of Metallic Coatings
ASTM B 537-1997, standard Practice for Rating of Elec-troplated Panels Subjected to Atmospheric Exposure
ASTM D 968-1993, Standard Test Methods for AbrasionResistance of Organic Coatings by Falling Abrasive
ASTM E 18-2000,Standard Test Methods for RockwellHardness and Rockwell Superficial Hardness of Metallic Materials
Publisher: American Society for Testing and Materials(ASTM),100 Barr Harbor Drive, West Conshohocken,PA 19428-2959
Guide to Hand Tools: Selection, Safety Tips, and ProperUse and Care
Publisher: Hand Tools Institute (HTI),25 North Broad-way, Tarrytown,NY 10591 4DEFINITIONS
See Fig. 1 as applicable.
adjustable jaw: movable portion of the wrench that con-tacts the fastener.
adjusting worm: portion of the wrench used to adjust theclearance between the fixed and adjustable jaw.
fixed jaw: portion of the frame that contacts the fastener.frame: portion of the wrench containing the fixed jawand handle.
handle.: portion of the wrench by which the tool is held.
proof torque: predetermined test torque to which a sampleis subjected.
worm pin: pin used to retain the adjusting worm in theframe.
worm spring: spring used to induce friction between theframe and adjusting worm for holding the adjustingworm in any preset position.
5REQUIREMENTS
The figures in this Standard are descriptive and notrestrictive, and are not intended to preclude the manu-facture of wrenches that are otherwise in accordancewith this Standard.
5.1 Materials
The materials used in the manufacture of the
wrenches shall be such as to produce tools conformingto this Standard.The frame,adjustable jaw, adjustingworm, and worm pin shall be steel.
5.2 Marking
Wrenches shall be marked in a legible and permanentmanner with the manufacturer’s name or with a trade-mark of such known character that the source of manu-facture and country of origin may be readily determined.5.3 Hardness
The frame (fixed jaw and handle) and adjustable jawshall show a hardness of not less than 40 HRC nor morethan 50 HRC when tested as specified in para.6.1.
5.4 Proof Torque
Wrenches shall withstand the proof torque specifiedherein for the appropriate size without failure or perma-nent deformation (set) that might affect the durability
ASME B107.8:2003 pdf free download
