ASME B107.17-2020 pdf free
ASME B107.17-2020 pdf free.Gages and Mandrels for Wrench Openings.
The following document is referenced in this Standard. The latest edition shall be used ASTM E18, Standard Test Methods for Rockwell Hardness of Metallic Materials Publisher: American Society for Testing and Materials (ASTM International), 100 Barr Harbor Drive, P.O.Box C700, West Conshohocken, PA 194282959 (www.astm.org)
4 REQUIREMENTS
The gages shall be similar to those shown in Figure 4-1 for hex gages and Figure 4-2 for square gages. Dimensions in inch series tables are in inches. and dimensions in metric series tables are in millimeters. except as specified.
4.1 MateriaL
4.1.1 Gages. The gages shall be made of steel, suitable for the purpose intended, and hardened to 60 HRC minimum. The hardness shall be tested using procedures outlined In ASTM E18.
4.1.2 MandreLs. The mandrels shall be made of steel, suitable for the purpose intended, and hardened to 5611 RC minimum. The hardness shall be tested using procedures outlined in ASTM E18.
4.2 Gage Use and Design
The gages shall be of the sizes and tolerances given in Tables 4.2-I. 4.2-IM, 4.2-2. 4.2-2M, 4.2-3, and 4.2-3M. Formulas are provided for sizes not listed.
The gages shall be used in accordance with accepted practices. Manufacturers may use gages with tighter dimensions than those shown herein.
The size for all limits (GO and NO GO) gages shall not exceed the extreme limits specified herein. All variations (manufacturing tolerance, calibration error, wear allowance, etc.) in the gages, whatever their cause or purpose, shall bring these gages within the extreme limits of the gage size specified within this Standard. Thus a gage that represents a minimum limit may be larger, but never 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 be used for determining dimensions forgages, When the next digit beyond the last digit to be retained is
(a) less than 5. the last digit to be retained is not changed
(b) 5 or more, the last digit to be retained is increased by one
4.3 MandreLs Use and Design
4.3.1 Mandrets for Nut End Socket Openings. The hexagon mandrels shall be of the size and tolerances given in Tables 4.3.1-1 and 4.3.1- 1M. The square mandrels shall be ofthe size and tolerance given in Table 4.3.1-2. The mandrel shall be inserted into the nut end socket opening to the depth indicated in the applicable table.
4.3.2 MandreLs for Wrench Openings. The hexagon mandrels shall be of the size and tolerances given in Tables 4.3.1-1, 4.3.1-1M. and 4.3.1-2. The mandrel shall be fully engaged to the thickness of the wrench head.ASME B107.17 pdf download.
