1、 WORLDWIDE FASTENER STANDARD WB 900 Appendix F Date: 2013-05-23 Printed copies are uncontrolled Copyright 2012, Ford Global Technologies, LLC Page 1 of 7 Enhanced hexalobular internal driving feature for bolts and screws 1 Scope This Ford Motor Company standard specifies the shape and basic dimensio
2、ns of enhanced hexalobular internal driving feature for bolts and screws including the gauging method. The curvature of the contour of the enhanced hexalobular internal driving feature is defined by the gauges specified in Tables 3, 4 and 5. Additional information which may be used when drawing the
3、contour is given in the informative annex A. 2 Basic dimensions See Figure 1 and Table 1 Counterbore c: 0.13 mm maximum for socket No. 6 IP through 15 IP, 0.25 mm maximum over socket No. 15 IP Penetration depth t: see relevant product standard NOTE: The contour of the bottom of the socket beyond the
4、 gauge is at the option of the manufacturer. WORLDWIDE FASTENER STANDARD WB 900 Appendix F Date: 2013-05-23 Printed copies are uncontrolled Copyright 2012, Ford Global Technologies, LLC Page 2 of 7 Table 1 Basic Dimensions Dimensions in millimeters Hexalobular Socket No. Nominal Dimensions A (ref) B
5、 (ref) 6 IP 1.75 1.27 8 IP 2.39 1.75 10 IP 2.82 2.05 15 IP 3.35 2.4 20 IP 3.94 2.85 25 IP 4.52 3.25 30 IP 5.61 4.05 40 IP 6.76 4.85 45 IP 7.92 5.64 50 IP 8.94 6.45 55 IP 11.33 8.05 60 IP 13.44 9.6 Table 2 Enhanced Hexalobular Internal Drive Tolerances Dimensions in millimeters Socket No. A B Ea Eb F
6、a Fb Drive Size Max Min Max Min Ref Ref Ref Ref 6 IP 1.7842 1.7416 1.3877 1.3454 0.1245 0.2313 0.0775 0.1843 8 IP 2.4241 2.3818 1.8653 1.823 0.1651 0.3051 0.1181 0.2581 10 IP 2.8508 2.8008 2.1802 2.1302 0.1969 0.359 0.145 0.3082 15 IP 3.3842 3.3342 2.612 2.562 0.2222 0.4233 0.1714 0.3725 20 IP 3.968
7、4 3.9184 3.0946 3.0446 0.2476 0.4945 0.1968 0.4437 25 IP 4.5649 4.4899 3.4981 3.4231 0.3023 0.565 0.2388 0.5015 30 IP 5.6571 5.5821 4.3973 4.3223 0.3505 0.6979 0.287 0.6344 40 IP 6.8134 6.7124 5.2894 5.1884 0.4229 0.8385 0.3467 0.7623 45 IP 7.9818 7.8808 6.2952 6.1942 0.4635 0.9839 0.3874 0.9077 50
8、IP 8.9978 8.8968 6.9861 6.8851 0.5448 1.0964 0.4686 1.0202 55 IP 11.3854 11.2844 9.0842 8.9832 0.6236 1.4048 0.5347 1.3159 60 IP 13.4424 13.3418 10.5214 10.4208 0.7912 1.6518 0.6769 1.5375 Note: Min A & B dimensions are the max tool dimension +0.05mm to accommodate for max coating thickness Max A &
9、B dimensions are the Min A & B dimensions + the standard hexalobular drive tolerance E & F are reference values using max go-gage radius WORLDWIDE FASTENER STANDARD WB 900 Appendix F Date: 2013-05-23 Printed copies are uncontrolled Copyright 2012, Ford Global Technologies, LLC Page 3 of 7 3 Gauging
10、3.1 Principle The enhanced hexalobular internal driving feature shall allow the GO gauge to enter freely to the penetration depth t as specified in the relevant product standards. The NO GO gauges shall not enter the enhanced hexalobular internal driving feature to a depth greater than the fallaway
11、allowance specified in Table 3. If the gage penetrates the internal drive feature outside of the specified fallaway allowance the part will be deemed unacceptable. Table 3 Fallaway Allowance Dimensions in millimeters Socket No. 6 IP 8 IP 10 IP 15 IP 20 IP 25 IP 30 IP 40 IP 45 IP 50 IP 55 IP 60 IP Fa
12、llaway Allowance f 0.35 0.48 0.56 0.67 0.79 0.90 1.12 1.18 1.39 1.56 1.98 2.35 All gauging is performed with reference to the top surface of the head. In the case of oval or round top heads, measurements are taken from the actual intersection of the top surface of the head and the hexalobular intern
13、al driving feature counter bore. When using a dial penetration gauge, this should be adjusted to zero while the gauge is pressed against a flat surface thereby compressing the plunger to make it flush with the gauge reference surface. See Figure 2. Figure 2 Penetration gauge in zero position WORLDWI
14、DE FASTENER STANDARD WB 900 Appendix F Date: 2013-05-23 Printed copies are uncontrolled Copyright 2012, Ford Global Technologies, LLC Page 4 of 7 3.2 GO gauge The GO gauge shall have dimensions within the limits specified in Table 4. Figure 3 Dimensions of the GO gauge Table 4 Limiting sizes of dime
15、nsions of the GO gauge Dimensions in millimeters Socket A B Ea Eb Fa Fb H Num. Min Max Min Max Min Max Min Max Min Max Min Max 0.25 6 IP 1.7018 1.7094 1.3056 1.3132 0.1207 0.1245 0.2275 0.2313 0.0737 0.0775 0.1805 0.1843 2.79 8 IP 2.3419 2.3495 1.7831 1.7907 0.1613 0.1651 0.3013 0.3051 0.1143 0.1181
16、 0.2543 0.2581 2.79 10 IP 2.7610 2.7762 2.0904 2.1057 0.1892 0.1969 0.3514 0.3590 0.1384 0.1460 0.3006 0.3082 2.79 15 IP 3.2944 3.3096 2.5222 2.5375 0.2146 0.2222 0.4157 0.4233 0.1638 0.1714 0.3649 0.3725 2.79 20 IP 3.8786 3.8938 3.0048 3.0201 0.2400 0.2476 0.4868 0.4945 0.1892 0.1968 0.4360 0.4437
17、3.81 25 IP 4.4501 4.4653 3.3833 3.3985 0.2946 0.3023 0.5574 0.5650 0.2311 0.2388 0.4939 0.5015 4.19 30 IP 5.5423 5.5575 4.2824 4.2977 0.3429 0.3505 0.6902 0.6979 0.2794 0.2870 0.6267 0.6344 4.70 40 IP 6.6726 6.6878 5.1486 5.1638 0.4153 0.4229 0.8309 0.8385 0.3391 0.3467 0.7547 0.7623 5.33 45 IP 7.84
18、10 7.8562 6.1544 6.1697 0.4559 0.4635 0.9763 0.9839 0.3797 0.3874 0.9001 0.9077 5.97 50 IP 8.8570 8.8722 6.8453 6.8605 0.5372 0.5448 1.0888 1.0964 0.4610 0.4686 1.0126 1.0202 6.22 55 IP 11.2446 11.2598 8.9433 8.9586 0.6159 0.6236 1.3972 1.4048 0.5271 0.5347 1.3083 1.3159 6.48 60 IP 13.3020 13.3172 1
19、0.3810 10.3962 0.7836 0.7912 1.6441 1.6518 0.6693 0.6769 1.5298 1.5375 7.92 WORLDWIDE FASTENER STANDARD WB 900 Appendix F Date: 2013-05-23 Printed copies are uncontrolled Copyright 2012, Ford Global Technologies, LLC Page 5 of 7 3.3 NOT GO gauges 3.3.1 Gauging the fallaway dimensions The fallaway ga
20、uge dimension limits are specified in Table 5. Figure 4 Dimensions of the fallaway gauge Table 5 Limiting sizes of dimensions of the fallaway gauge Dimensions in millimeters Socket Num. A K Fa Fb H V R -0.0000 +0.0076 Max -0.0000 +0.0038 -0.0000 +0.0038 0.25 +0.0000 -0.0038 Rad. 6 IP 1.7856 1.1834 0
21、1156 0.2224 2.79 0.1894 0.03 8 IP 2.4257 1.5945 0.1562 0.2962 2.79 0.2632 0.03 10 IP 2.8524 1.8652 0.1841 0.3463 2.79 0.3133 0.05 15 IP 3.3858 2.2192 0.2095 0.4106 2.79 0.3776 0.05 20 IP 3.9700 2.6102 0.2349 0.4818 2.79 0.4487 0.05 25 IP 4.5669 2.9822 0.2896 0.5523 2.79 0.5066 0.05 30 IP 5.6591 3.7
22、122 0.3378 0.6852 4.70 0.6394 0.05 40 IP 6.8148 4.4673 0.4102 0.8258 5.33 0.7674 0.05 45 IP 7.9832 5.2636 0.4509 0.9712 5.97 0.9128 0.05 50 IP 8.9992 5.8920 0.5321 1.0837 6.22 1.0253 0.05 55 IP 11.4122 7.5562 0.6109 1.3921 6.48 1.3210 0.05 60 IP 13.495 8.8605 0.7658 1.6264 7.92 1.5552 0.05 WORLDWIDE
23、 FASTENER STANDARD WB 900 Appendix F Date: 2013-05-23 Printed copies are uncontrolled Copyright 2012, Ford Global Technologies, LLC Page 6 of 7 Table 6 Socket Gauging Penetration Tolerances Dimensions in millimeters I=Recess Gauge Penetration Head Type Pan 90 Raised Countersunk 90 Flat Countersunk A
24、 B C Recess Ref. Suitable screw sizes for head forms and recess specified Head form dimensions as specified in: WB900 or WD900 Head form dimensions as specified in: WB900 or WD900 Head form dimensions as specified in: WB900 or WD900 Dimension (I) Dimension (I) Dimension (I) Max. Min. Max. Min. Max.
25、Min. 6 IP M2 0.81 0.68 0.72 0.6 0.72 0.6 10 IP M3 1.3 1.1 1.16 0.96 1.16 0.96 15 IP ST3.5 1.54 1.31 1.37 1.14 1.37 1.14 20 IP M4, ST4.2 1.81 1.54 1.62 1.34 1.62 1.34 25 IP M5, ST4.8 2.08 1.76 1.85 1.54 1.85 1.54 30 IP M6,ST6.3 2.58 2.19 2.3 1.91 2.3 1.91 40 IP M8 3.11 2.64 2.76 2.28 2.77 2.3 50 IP M
26、10 4.11 3.49 3.67 3.04 3.67 3.04 55 IP M12 5.21 4.58 NA NA NA NA WORLDWIDE FASTENER STANDARD WB 900 Appendix F Date: 2013-05-23 Printed copies are uncontrolled Copyright 2012, Ford Global Technologies, LLC Page 7 of 7 Annex A (Informative) Representation of enhanced hexalobular internal driving feature contour NOTE: The correlations of dimensions given in Figure A.1 are intended to support the drawing of the driving feature only, e.g. when using a CAD system. Scale to socket nominal dimension per Table 1 as needed. Figure A.1 Representation of enhanced hexalobular internal driving feature
