BS-SP-31 32-1951.pdf
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1、BRITISH STANDARD BS SP 31 and 32:1951 (Replacing A.G.S. 213) Incorporating Amendment Nos. 1 and 2 Specifications for Split taper pins for aeronautical purposes Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:18:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
2、 SP 31 and 32:1951 These British Standards, having been approved by the Aircraft Industry Standards Committee and endorsed by the Chairman of the Engineering Divisional Council, were published under the authority of the General Council of the Institution on 30 March 1951 BSI 05-2000 ISBN 0 580 34443
3、 6 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document compris
4、es a front cover, an inside front cover, pages i and ii, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.
5、Date of issueComments 1275October 1951 1799August 1975Indicated by a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:18:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS SP 31 and 32:1951 BSI 05-2000i Contents Page 1Scope1 2Material1 3Di
6、mensions1 4Finish1 5Protective treatment1 6Bend test1 7Number of bend tests1 8Identification1 Figure 1 Bend Test1 Figure 2 Split Taper pin2 Figure 3 Alternative form of pin with conical end, at the option of the manufacturer2 Table 1 British Standard numbers and materials1 Table 2 Dimensions and par
7、t references2 Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:18:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: London South Bank University, London South Bank University, Sat Dec 09 03:18:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI B
8、S SP 31 and 32:1951 BSI 05-20001 1 Scope These British Standards Specify the materials, dimensions and finish of split taper pins for aeronautical purposes. 2 Material The pins shall be manufactured from the appropriate material specified in Table 1. 3 Dimensions The pins shall conform to the dimens
9、ions and limits specified in Table 2. The nominal size of the pin is the nominal fractional diameter at the small end. The large end of the pins shall be domed in shape, or, at the option of the manufacturer, may be in the form of a cone as shown in Figure 3. The small end of the pins may be plain,
10、dimpled or slotted, at the option of the manufacturer. The pins shall be split and not sawn. 4 Finish The pins shall have a smooth machined or ground finish and shall be free from defects. 5 Protective treatment Pins complying with BS SP 31 shall be cadmium plated in accordance with Ministry of Supp
11、ly aircraft process specification D.T.D. 904.1) 6 Bend test Sample pins, selected as specified in Clause 7 shall, when cold, satisfy the following test: Each wing of the pin shall be bent outwards round a former radiused equal to one-quarter of the mean diameter of the pin, and situated at a positio
12、n approximately two-thirds of the length of the split from the small end of the pin, through an angle of 45, the two wings forming an included angle of 90 as shown in Figure 1, and shall not fracture. 7 Number of bend tests Two pins, or more at the discretion of the inspector, shall be selected at r
13、andom from each parcel of 3 gross or less. If either of the pins selected fails in the bend test four further pins shall be taken at random from the same parcel and tested. Should all the second samples pass the test the whole parcel from which the samples were selected shall be accepted. If any of
14、the second samples fail to pass the test, the whole parcel may be deemed not to comply with these standards. 8 Identification The pins shall be identified for ordering by the number of the British Standard as shown in Table 1, together with the appropriate part reference shown in Table 2, for exampl
15、e, a 1/8 11/2 in. pin in stainless steel is SP. 32 H. 12. Table 1 British Standard numbers and materials 1) Latest issue. NOTEIt is recommended that, in use, the wings of split pins should not be opened out beyond an included angle of 90. Figure 1 Bend Test British Standard Numbers Material Descript
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