1、FORD WORLDWIDE FASTENER STANDARDDate: 1993-01-01Engineering Standards & 1 of 3 Printed copies are uncontrolled .Systems Engineering (ESSE)WH 903General Requirements and Physical Properties for Slotted Spring Pins - Heavy Series1. SCOPE. This standard specifies the general requirements for gauging an
2、d physical properties for heavyseries slotted spring pins intended for general use.1.1 R EFERENCES.ISO 3670 - Blanks for plug gauges and handles (taper lock and trilock) and ringgauges -Design and general dimensions.ISO 6507/1 - Metallic materials - Hardness test - Vickers test.ISO 6508 - Metallic m
3、aterials - Hardness test - Rockwell test.WSD-M1A283-B38/B39/ B50/B51/B52/B55 - Steel, cross references for standard parts.2. GENERAL REQUIREMENTS.2.1 DIAMETER. Pin diameters shall be inspected using Go/No Go ring gauges. Dimensions shownin Table 1. with the thickness as specified in ISO 3670.Table 1
4、.Dimensions in mmPin Size 2 3 4 5 6 8 10Go Gauge 2.4 3.5 4.6 5.6 6.7 8.8 10.82.41 3.51 4.61 5.61 6.71 8.81 10.81No Go 2.29 3.29 4.39 5.39 6.39 8.49 10.49Gauge 2.3 4.4 5.4 6.4 8.5 10.52.2 STRAIGHTNESS. Straightness of pins shall be within limits necessary to permit pins to fallthrough a ring gauge by
5、 their own weight. Ring gauge dimensions are shown in Table 2.Table 2.Dimensions in mmPin Length Gauge Length Gauge Hole Dia. *Max. Min. Min. Max.Up to and Specified Pin Dia. Maxplus plusincluding 25 25.12 24.35 0.20 0.21Over 25 to 50 50.15 49.35 0.40 0.42Over 50 75.15 74.35 0.60 0.63* Gauge Hole Di
6、ameter = Max. pin diameter plus indicated values.3. MATERIAL AND HEAT TREATMENT.3.1 MATERIAL. Steel to WSD-M1A283-B38/39/50/51/52/55.3.2 HEAT TREATMENT. Harden and Temper HV420 - 520 or Austemper HV420 - 560.4. PHYSICAL PROPERTIES.4.1 HARDNESS TESTING. The hardness testing shall be performed in acco
7、rdance with the followingprocedures:Vickers Hardness to ISO 6507/1 and 2:10 kg load.Rockwell Hardness to ISO 6508.NOTE: In case of dispute the Vickers Hardness test is decisive for acceptance.FORD WORLDWIDE FASTENER STANDARDDate: 1993-01-01Engineering Standards & 2 of 3 Printed copies are uncontroll
8、ed .Systems Engineering (ESSE)WH 903General Requirements and Physical Properties for Slotted Spring Pins - Heavy Series4.2 PERFORMANCE. Pins shall be capable of withstanding the double shear loads specified in Table3. The shear test shall be performed in a fixture in which the pin support member and
9、 the memberfor apply the load shall have holes with diameters as recommended for the pins and shall have ahardness of HV 700 minimum. The clearance between the supporting members and the loadmember shall no exceed 0.15mm and the shear plane shall be at least one pin diameter away fromeach end and at
10、 least two diameters apart. Pins too short to be tested in double shear shall be testedby shearing two pins simultaneously in single shear. Speed of testing shall not exceed13mm/minute. Pins shall be tested to failure. The maximum load applied to the pin coincidentwith or prior to pin failure shall
11、be recorded as the double shear strength of the pin. Pins tested forshear strength shall show a ductile shear without longitudinal cracks.Table 3.Dimensions in mmNominal Pin Size 2 3 4 5 6 8 10Min. Double Shear Strength -kN2.82 6.32 11.24 17.54 26.04 42.76 70.16FORD WORLDWIDE FASTENER STANDARDDate:
12、1993-01-01Engineering Standards & 3 of 3 Printed copies are uncontrolled .Systems Engineering (ESSE)WH 903General Requirements and Physical Properties for Slotted Spring Pins - Heavy SeriesTypical Spring Pin Shear Test Fixtures4. DEFECTS. Pins shall be free from burrs. loo se scale, seams, notches, sharp edges and corners and anyother defects affecting serviceability.5. RECOMMENDED APPLICATION HOLE SIZES. See Table 4.Table 4.Dimensions in mmNominal Pin Size 2 3 4 5 6 8 10Hole Dia. max. 2.1 3.1 4.12 5.12 6.12 8.15 10.15min. 2 3 4 5 6 8 10
