1、BRITISH STANDARD BS SP 113: 1954 Incorporating Amendment Nos. 1, 2 and 3 Specification for Cadmium plated close tolerance shear pins For aircraftBSSP 113:1954 This British Standard, having been approved by the AircraftIndustry Standards Committee and endorsed by theChairman of the Engineering Divisi
2、onal Council, was publishedunder authority of the General Council of the Institutionon 10June1954 BSI 02-2000 ISBN 0 580 34426 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. Compli
3、ance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorp
4、orated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date of issue Comments 2098 February 1955 4080 February 1961 1223 July 1973 Indicated by a sideline in the marginBSSP 113:1954 BSI 02-2000 i Contents Page 1 Scope 1 Section 1
5、. General requirements 2 Manufacture 1 3 Dimensions 1 4 Finish 1 5 Freedom from defects 1 6 Protective treatment 1 7 Tolerance on straightness of pins 1 8 Identification and marking 1 Section 2. Particular requirements for pins machined from bar 9 Material 1 Section 3. Particular requirements for pi
6、ns cold-headed from wire 10 Manufacture 1 11 Heat treatment 1 12 Selection of mechanical test samples 2 13 Mechanical tests 2 14 Re-tests 2 15 Hardness test 2 16 Magnetic flaw detection 2 Table 1 Maximum permissible bow 1 Table 2 Dimensions of close tolerance shear pins 3 Table 3 Bearing lengths “L”
7、, overall lengths “E” and part numbers of close tolerance shear pins 4ii blankBSSP 113:1954 BSI 02-2000 1 1 Scope This British Standard specifies the materials, dimensions and finish of close tolerance shear pins for aircraft, cadmium plated to be suitable for insertion in aluminium alloy materials.
8、 Requirements applicable to all pins covered by this standard are stated in Section1; Sections 2 and 3 contain particular requirements for pins machined from bar and those produced by a cold-heading process. Section 1. General requirements 2 Manufacture The pin heads shall be concentric with the axi
9、s of the shanks and the radius under the heads shall run smoothly into the face of the head and shank without any stop or discontinuity. Split pin holes shall be drilled clean and free from burrs. 3 Dimensions All finished pins, after the application of the anti-corrosion coating, shall conform to t
10、he dimensions and limits specified in Table 1, Table 2 and Table 3, except that, as a provision to meet possible difficulties in plating, the diameter of the shank after coating may be0.0003in. greater than the maximum dimension specified inTable 2 4 Finish The pins, before coating, shall have a smo
11、oth machined or ground finish. 5 Freedom from defects a) The pins shall be free from harmful defects. b) Pins may be rejected at any time for faults in, or revealed by, manufacture, although they have been made from steel passed previously for chemical composition and mechanical properties. 6 Protec
12、tive treatment All finished pins shall be uniformly coated with cadmium in accordance with the latest issue of Ministry of Defence (Procurement Executive) aircraft process specification D.D.T.904. 7 Tolerance on straightness of pins The bow shall be measured by feeler gauges after placing the shank
13、of the pin on a flat surface, and shall not exceed the dimensions given inTable 1. Table 1 Maximum permissible bow 8 Identification and marking a) All pins of 0.1898 in. nominal size and over shall have the appropriate part number seeClause8 c) applied on the upper face of the head. b) All pins unde
14、r 0.1898 in. nominal size shall be made into parcels which shall have the number of this British Standard and the appropriate part number seeClause8 c) clearly stated on the labels. c) The British Standard number shall not be applied on the pins, but shall be used for the purpose of specifying pins
15、on drawings and for ordering the parts. For example, the complete part reference number for a 1 / 4in. pin of lengthL= 0.55in. for ordering etc. is BSSP113 E5 1 / 2but the corresponding markingon the pin will be E5 1 / 2 . Section 2. Particular requirements for pins machined from bar 9 Material The
16、pins shall be machined from high tensile steel bars complying with the requirements of the latest issue of BSS94, BSS96, BSS114, or BSS117. Section 3. Particular requirements for pins cold-headed from wire 10 Manufacture The pins shall be made by an approved cold-heading process from wire complying
17、with the latest issue of BSS105, “Carbon steel.” 11 Heat treatment a) All pins shall be hardened and tempered to meet the mechanical test requirements of Clause13. Nominal size of pin Maximum permissible bow 1 / 8in., 5 / 32in., 3 / 16in. and0.1898in. 0.0015 per inch of pin length plus a constant of
18、 0.001 in. 1 / 4in. 0.0012 per inch of pin length plus a constant of 0.001 in. 5 / 16in. and 3 / 8in. 0.0010 per inch of pin length plus a constant of 0.001 in. 7 / 16in. 0.0007 per inch of pin length plus a constant of 0.001 in. 1 / 2in. 0.0005 per inch of pin length plus a constant of 0.001 in.BSS
19、P 113:1954 2 BSI 02-2000 b) No pins shall be re-hardened more than twice. 12 Selection of mechanical test samples a) Pins hardened and tempered by a continuous process. During each period of continuous heat treatment not exceeding8 hours, at least one test sample shall be selected. This test sample
20、shall be either one of the pins of the largest diameter that have been heat treated during this period, or a length of wire from which these pins have been made and which has been hardened and tempered with the pins represented. b) Pins hardened by a continuous process or in batches, and tempered in
21、 batches comprising one tempering furnace charge. Sufficient test samples shall be hardened with the pins to enable at least one test sample to be tempered with each batch. This test sample shall be either one pin of the largest diameter from the tempered batch, or a length of wire from which the la
22、rgest pins in the tempered batch have been made. c) The test samples shall be tested in accordance with Clause13. 13 Mechanical tests a) All tests shall be carried out to the satisfaction of the Inspecting Authority. b) The test pieces and the method of testing shall be in accordance with the requir
23、ements of the latest issue of BSA4, “Test pieces and test methods for aircraft metallic materials.” For all pins the tests shall be made on a machined test piece or on a sample of full diameter, at the option of the manufacturer. c) The mechanical properties of the material shall be as follows: d) W
24、hen the dimensions of a test sample are such that an impact test cannot be made from it, a nicked fracture test shall be made instead. The test shall be made as follows: The test sample shall be nicked or sawn so that the area of the portion to be fractured is not less than one-half of the original
25、sectional area and shall be broken by the least possible number of blows. The fractured surfaces shall be free from defects. 14 Re-tests If any test piece fails to meet the mechanical test requirements, two further samples, selected as in Clause12, shall be submitted to the mechanical tests specifie
26、d in Clause13. If either of these test pieces fails to meet the mechanical test specified the pins represented may be rejected or, at the request of the manufacturer, shall be re-heat treated and re-tested in accordance with Clauses12 and 13 15 Hardness test a) A Brinell or a diamond pyramid hardnes
27、s test shall be made on the test sample and on selected heat treated pins from each period or tempered batch, in order to verify the uniformity of the heat treatment. The number of hardness tests, and the results obtained, shall be to the satisfaction of the Inspecting Authority. b) The Brinell test
28、 shall be carried out in accordance with BS240 1)and the diamond pyramid test shall be carried out in accordance with BS427 2) . All tests on the same batch shall be made by the same method and under the same conditions of loading. 16 Magnetic flaw detection All the pins, or a selected percentage of
29、 them, as determined by the Inspecting Authority, shall be subjected to electro-magnetic flaw detection to the satisfaction of the Inspecting Authority. The presence of any crack shall involve rejection of thepin. 0.1 per cent proof stress . not less than 43 tons/sq. in. Ultimate tensile stress . no
30、t less than 55 tons/sq. in. not more than 65 tons/sq. in. Elongation on 4 . not less than 18 per cent. Izod impact value. . not less than 40 ft. lb. area 1) BS240-1. “Methods and tables for Brinell hardness testing”. BS240-2. “Steel balls for Brinell hardness testing”. 2) BS427. “Tables of diamond p
31、yramid hardness numbers”.BS SP 113:1954 BSI 02-2000 3 Table 2 Dimensions of close tolerance shear pins For bearing length “L” and overall length “E” see Table 3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Nominal size Diameter of parallel portion of shank A Width across flats Width across corners Thickness of
32、head Split pin hole Diameter of alternative head Before plating After plating a(Design diameter) B C D F G H min. max. min. max. min. max. max. min. max. Drill size Dia. Bar size (except a ) in. in. in. in. in. in. in. in. in. in. in. in. in. 1 / 8 5 / 32 3 / 16 0.12385 0.15510 0.18635 0.12435 0.155
33、60 0.18685 0.12425 0.15550 0.18675 0.12475 0.15600 0.18725 0.1890 0.2430 0.2430 0.1930 0.2480 0.2480 0.220 0.290 0.290 0.065 0.070 0.075 0.070 0.075 0.080 No. 52 No. 52 No. 52 0.0635 0.0635 0.0635 0.170 0.170 0.170 1 / 4 5 / 16 5 / 16 0.1898 1 / 4 5 / 16 0.18865 0.24885 0.31115 0.18915 0.24935 0.311
34、65 0.18905 0.24925 0.31175 0.18955 0.24975 0.31225 0.3190 0.3700 0.4305 0.3240 0.3750 0.4375 0.370 0.433 0.505 0.075 0.075 0.100 0.080 0.085 0.110 No. 52 No. 52 No. 41 0.0635 0.0635 0.0960 0.170 0.170 0.200 3 / 8 0.43 a 1 / 2 3 / 8 7 / 16 1 / 2 0.37365 0.43615 0.49865 0.37415 0.43665 0.49915 0.37425
35、 0.43675 0.49925 0.37475 0.43725 0.49975 0.4930 0.5545 0.6795 0.5000 0.5625 0.6875 0.577 0.650 0.794 0.100 0.100 0.100 0.110 0.110 0.110 No. 30 No. 30 No. 30 0.1285 0.1285 0.1285 0.230 0.230 0.230 9 / 16 5 / 8 3 / 4 a See Clause 3.BSSP 113:1954 4 BSI 02-2000 Table 3 Bearing lengths “L”, overall leng
36、ths “E” and part numbers of close tolerance shear pins 1 / 8in. 5 / 32in. 3 / 16in. Part No. L + 0.010 0 E + 0.010 0 Part No. L + 0.010 0 E + 0.010 0 Part No. L + 0.010 0 E + 0.010 0 in. in. in. in. in. in. A3 A3 1 / 2 A4 0.30 0.35 0.40 0.47 0.52 0.57 B3 B3 1 / 2 B4 0.30 0.35 0.40 0.47 0.52 0.57 C3
37、C3 1 / 2 C4 0.30 0.35 0.40 0.47 0.52 0.57 A4 1 / 2 A5 A5 1 / 2 0.45 0.50 0.55 0.62 0.67 0.72 B4 1 / 2 B5 B5 1 / 2 0.45 0.50 0.55 0.62 0.67 0.72 C4 1 / 2 C5 C5 1 / 2 0.45 0.50 0.55 0.62 0.67 0.72 A6 A6 1 / 2 A7 0.60 0.65 0.70 0.77 0.82 0.87 B6 B6 1 / 2 B7 0.60 0.65 0.70 0.77 0.82 0.87 C6 C6 1 / 2 C7
38、0.60 0.65 0.70 0.77 0.82 0.87 A7 1 / 2 A8 A8 1 / 2 0.75 0.80 0.85 0.92 0.97 1.02 B7 1 / 2 B8 B8 1 / 2 0.75 0.80 0.85 0.92 0.97 1.02 C7 1 / 2 C8 C8 1 / 2 0.75 0.80 0.85 0.92 0.97 1.02 A9 A9 1 / 2 A10 0.90 0.95 1.00 1.07 1.12 1.17 B9 B9 1 / 2 B10 0.90 0.95 1.00 1.07 1.12 1.17 C9 C9 1 / 2 C10 0.90 0.95
39、 1.00 1.07 1.12 1.17 A11 1.10 1.27 B11 1.10 1.27 C11 1.10 1.27BSSP 113:1954 BSI 02-2000 5Table 3 Bearing lengths “L”, overall lengths “E” and part numbers of close toleranceshearpins 0.1898 in. 1 / 4in. 5 / 16in. Part No. L + 0.010 0 E + 0.010 0 Part No. L + 0.010 0 E + 0.010 0 Part No. L + 0.010 0
40、E + 0.010 0 in. in. in. in. in. in. X3 X3 1 / 2 X4 0.30 0.35 0.40 0.47 0.52 0.57 E3 E3 1 / 2 E4 0.30 0.35 0.40 0.47 0.52 0.57 G3 G3 1 / 2 G4 0.30 0.35 0.40 0.50 0.55 0.60 X4 1 / 2 X5 X5 1 / 2 0.45 0.50 0.55 0.62 0.67 0.72 E4 1 / 2 E5 E5 1 / 2 0.45 0.50 0.55 0.62 0.67 0.72 G4 1 / 2 G5 G5 1 / 2 0.45 0
41、.50 0.55 0.65 0.70 0.75 X6 X6 1 / 2 X7 0.60 0.65 0.70 0.77 0.82 0.87 E6 E6 1 / 2 E7 0.60 0.65 0.70 0.77 0.82 0.87 G6 G6 1 / 2 G7 0.60 0.65 0.70 0.80 0.85 0.90 X7 1 / 2 X8 X8 1 / 2 0.75 0.80 0.85 0.92 0.97 1.02 E7 1 / 2 E8 E8 1 / 2 0.75 0.80 0.85 0.92 0.97 1.02 G7 1 / 2 G8 G8 1 / 2 0.75 0.80 0.85 0.9
42、5 1.00 1.05 X9 X9 1 / 2 X10 0.90 0.95 1.00 1.07 1.12 1.17 E9 E9 1 / 2 E10 0.90 0.95 1.00 1.07 1.12 1.17 G9 G9 1 / 2 G10 0.90 0.95 1.00 1.10 1.15 1.20 X11 1.10 1.27 E11 E12 E13 1.10 1.20 1.30 1.27 1.37 1.47 G11 G12 G13 1.10 1.20 1.30 1.30 1.40 1.50 E14 E15 E16 1.40 1.50 1.60 1.57 1.67 1.77 G14 G15 G1
43、6 1.40 1.50 1.60 1.60 1.70 1.80 G17 G18 1.70 1.80 1.90 2.00BSSP 113:1954 6 BSI 02-2000Table 3 Bearing lengths “L”, overall lengths “E” and part numbers of close toleranceshearpins 3 / 8in. 7 / 16in. 1 / 2in. Part No. L + 0.010 0 E + 0.010 0 Part No. L + 0.010 0 E + 0.010 0 Part No. L + 0.010 0 E + 0
44、.010 0 in. in. in. in. in. in. J3 J3 1 / 2 J4 0.30 0.35 0.40 0.53 0.58 0.63 L3 L3 1 / 2 L4 0.30 0.35 0.40 0.53 0.58 0.63 N3 N3 1 / 2 N4 0.30 0.35 0.40 0.53 0.58 0.63 J4 1 / 2 J5 J5 1 / 2 0.45 0.50 0.55 0.68 0.73 0.78 L4 1 / 2 L5 L5 1 / 2 0.45 0.50 0.55 0.68 0.73 0.78 N4 1 / 2 N5 N5 1 / 2 0.45 0.50 0
45、.55 0.68 0.73 0.78 J6 J6 1 / 2 J7 0.60 0.65 0.70 0.83 0.88 0.93 L6 L6 1 / 2 L7 0.60 0.65 0.70 0.83 0.88 0.93 N6 N6 1 / 2 N7 0.60 0.65 0.70 0.83 0.88 0.93 J7 1 / 2 J8 J8 1 / 2 0.75 0.80 0.85 0.98 1.03 1.08 L7 1 / 2 L8 L8 1 / 2 0.75 0.80 0.85 0.98 1.03 1.08 N7 1 / 2 N8 N8 1 / 2 0.75 0.80 0.85 0.98 1.0
46、3 1.08 J9 J9 1 / 2 J10 0.90 0.95 1.00 1.13 1.18 1.23 L9 L9 1 / 2 L10 0.90 0.95 1.00 1.13 1.18 1.23 N9 N9 1 / 2 N10 0.90 0.95 1.00 1.13 1.18 1.23 J11 J12 J13 1.10 1.20 1.30 1.33 1.43 1.53 L11 L12 L13 1.10 1.20 1.30 1.33 1.43 1.53 N11 N12 N13 1.10 1.20 1.30 1.33 1.43 1.53 J14 J15 J16 1.40 1.50 1.60 1.
47、63 1.73 1.83 L14 L15 L16 1.40 1.50 1.60 1.63 1.73 1.83 N14 N15 N16 1.40 1.50 1.60 1.63 1.73 1.83 J17 J18 J19 1.70 1.80 1.90 1.93 2.03 2.13 L17 L18 L19 1.70 1.80 1.90 1.93 2.03 2.13 N17 N18 N19 1.70 1.80 1.90 1.93 2.03 2.13 J20 J22 2.00 2.20 2.23 2.43 L20 L22 L24 2.00 2.20 2.40 2.23 2.43 2.63 N20 N22
48、 N24 2.00 2.20 2.40 2.23 2.43 2.63 L26 L28 2.60 2.80 2.83 3.03 N26 N28 N30 2.60 2.80 3.00 2.83 3.03 3.23 N32 N34 3.20 3.40 3.43 3.63blankBS SP 113: 1954 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStand
49、ards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this BritishStandard would inform the Secretary of the technical committee resp
