ASME B107.17-2015 pdf – Gages and Mandrels for Wrench Openings
ASME B107.17-2015 pdf – Gages and Mandrels for Wrench Openings.
ASME B107.17 establishes final inspection gage sizes and test mandrel sizes for wrench openings and spark plug wrench openings for inch and metric sizes. This Standard does not cover every available size, but only those most commonly manufactured.
The gages covered by this Standard shall be used to ensure the manufacture of conforming products in inch and metric sizes.
The following documents are 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 19428-2959
The gages shall be similar to those shown in Fig. 1 for hex gages and Fig. 2 for square gages. Dimensions in inch series tables are in inches, and dimensions in metric series tables are in millimeters, except as specified.
4.1.1 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 56 HRC 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 1, 1M,2, 2M, 3, and 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 this 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. Rounding method is to be used for determining dimensions for gages. 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 Mandre(s Use and Design
4.3.1 Mandrels for Nut End Socket Openings. The
hexagon mandrels shall be of the size and tolerances given in Tables 4 and 4M. The square mandrels shall be of the size and tolerance given in Table 5. 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, 4M, and 5. The mandrel shall be fully engaged to the thickness of the wrench head.