ASME B107.17:2020 pdf free download

ASME B107.17:2020 pdf free download.Gages and Mandrels for Wrench Openings.
3 REFERENCES
The following document is referenced in this Standard. The latest edition Shall be used.
ASTM El 8. Standard Test Methods for Rockwell I lardness ol Metallic Materials
Publisher: Anwrican Society for Testing and Materials
(ASTM International), 100 Barr Harbor Drive, P.0,
Box C700, West Conshohocken, PA 19428-2959 (Www.astm.org)
4 REQUIREMENTS
The gages shall be similar to those showmi in Figure 4- I for hex gages and Figure ‘1—2 [or square g.Iges. Dimensions in inch series tables are in inches, and dimensions in metric series tables .ire in millimeters, except as specified.
4.1 Material
4.1.1 Gages. The gages shall be itiade of steel, suitable for the purpose intended, and hardened to 60 H R:
minimum. The hardness shall be tested using procedures outlined in ASTM Hill.
4.1.2 Mandrels. The mandrels shall he made o steel, suitable torthe purpose intended, and hardened to 56 H RC minimum. The hardness shall be tested using procedures outlined in ASTM Hill.
4.2 Gage Use and Design
The gages shall he of the sizes and tolerances given in Tables 4.2-1, 42-tM, 4.2-2, 42-2M, 4.2-3. and 4.2-3M. Formulas are provided or sizes not listed.
The gages shall be used in accordance with acceptedpractices. Manufacturers may use gages with tighterdimensions than those shown herein.
The size for all limits (G0 and No GO) gages shall notexceed the extreme limits specified herein.All variations(manufacturing tolerance, calibration error, wear allow-ance, etc.) in the gages, whatever their cause or purpose,shall bring these gages within the extreme limits of thegage size specified within this Standard.Thus a gagethat represents a minimum limit may be larger, butnever smaller, than the minimum size specified; likewise,the gage that represents a maximum limit may be smaller,but never larger, than the maximum size specified.
4.2.1 Rounding Method.A rounding method shall beused for determining dimensions for gages.When the nextdigit beyond the last digit to be retained is
a) less than 5, the last digit to be retained is notchanged
b) 5 or more,the last digit to be retained is increasedby one
4.3 Mandrels Use and Design
4.3.1 Mandrels for Nut End Socket Openings.Thehexagon mandrels shall be of the size and tolerancesgiven in Tables 4.3.1-1 and 4.3.1-1M.The square mandrelsshall be of the size and tolerance given in Table4.3.1-2.Themandrel shall be inserted into the nut end socket openingto the depth indicated in the applicable table.
4.3.2 Mandrels for Wrench Openings.The hexagonmandrels shall be of the size and tolerances given inTables 4.3.1-1，4.3.1-1 M,and 4.3.1-2.The mandrel shallbe fully engaged to the thickness of the wrench head.