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1、BRITISH STANDARD BS 2485:1987 Specification for Tee slots, tee bolts, tee nuts and tenons UDC 621.9 229.311:621.882 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1987 This British Standard, having been prepared under the direction
2、of the Machine Engineers and Hand Tools Standards Committee, was published under the authority of the Board of BSI and comes into effect on 31 December 1987 BSI 02-2000 First published June 1954 First revision January 1969 Second revision April 1973 Third revision December 1987 The following BSI ref
3、erences relate to the work on this standard: Committee reference MTE/1 Draft for comment 86/70342 DC ISBN 0 580 16359 8 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Machine, Engineers and Hand Tools Standards Committee (MTE/-) to Tech
4、nical Committee MTE/1 upon which the following bodies were represented: Advanced Manufacturing Technology Research Institute Cranfield Institute of Technology Department of Trade and Industry Mechanical Engineering and Manufacturing Technology Division (Mmt) Health and Safety Executive Institution o
5、f Production Engineers Ministry of Defence University of Aston in Birmingham Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1987 BSI 02-2000i Contents Page Committees
6、 responsibleInside front cover Forewordii 1Scope1 2Designation of tee slots1 3Dimensions of tee slots, tee bolts, tee nuts and tenons1 4Dimensions of tee slots used as tenon slots1 5Positioning of tee slots in rectangular tables1 6Tee bolts and tee nuts1 7Tenons1 8Marking1 Figure 1 Tee slot profile2
7、 Figure 2 Tee nut3 Figure 3 Tee bolt3 Figure 4 Tenon3 Table 1 Dimensions of tee slot profile2 Table 2 Tolerances on pitches of tee slots3 Table 3 Dimensions of tee bolts and tee nuts4 Table 4 Dimensions of tenons5 Publications referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na,
8、Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1987 ii BSI 02-2000 Foreword This British Standard has been prepared under the direction of the Machine, Engineers and Hand Tools Standards Committee and implements agreements of the International Organization for Standardization
9、 (ISO). This edition supersedes BS 2485:1973, which is withdrawn. It has been prepared to take account of the revision of ISO 299 “Tee slots for machine tools” and the dimensions of the tee slots given are technically equivalent to those in ISO 299. This standard varies from ISO 299 in the following
10、 respects. Inch dimensions. In accordance with the UK policy of metrication, the inch dimensions given in ISO have not been included in this British Standard. Tee slot pitches. ISO 299 states that if values of pitch greater or less than those given in Table 1 are essential, they should be chosen fro
11、m the values of the R 10 series of preferred numbers and that if intermediate values are required they should be chosen from the values of the R 20 series. In the interests of rationalization, this standard does not permit these choices. However, in order to facilitate interchangeability of equipmen
12、t throughout a given manufacturers complete range, this standard provides for the choice of any pitch given in the standard (see clause 5) rather than restricting given pitches to given sizes of tee slots as in ISO 299. Tee bolts. Full dimensions and material requirements are given whereas ISO 299 g
13、ives only the dimensions of the bolt head. In Table 3, dimension E has been retained from the 1973 edition of this standard as it is more appropriate. This standard gives dimensions for tee nuts and tenons. A British Standard does not purport to include all the necessary provisions of a contract. Us
14、ers 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 comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, an inside back cover and
15、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. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1987
16、 BSI 02-20001 1 Scope This British Standard specifies dimensions for tee slots for use in machine tools and their auxiliary equipment, and dimensions for tee bolts, tee nuts and tenons to be used in the tee slots. It also specifies a range of pitches between tee slots in machine beds and materials f
17、or tee bolts, tee nuts and tenons. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Designation of tee slots The tee slot and the corresponding bolt shall be designated by the nominal size of the bolt thread, e.g. M10. 3 Dimensions of tee slots,
18、tee bolts, tee nuts and tenons The dimensions of tee slots, tee bolts, tee nuts and tenons shall be as given in Table 1 (see also Table 2), Table 3 and Table 4 respectively. 4 Dimensions of tee slots used as tenon slots The dimensions of tee slots used as tenon slots shall be as given in Table 1 and
19、 the tolerances on the width of the throats of the slots given in column 4 shall apply rather than those given in column 3. 5 Positioning of tee slots in rectangular tables 5.1 One slot shall be designated as a reference slot. NOTEThe centre line of the reference slot should lie along the centre lin
20、e of the machine table. If there is an even number of slots, the reference slot shall be clearly marked on the machine table itself. 5.2 The pitches of the slots, i.e. the dimensions between centres, shall be as given in Table 1 and the tolerance on pitches given in Table 2 shall apply. In addition
21、to the corresponding pitches for a tee slot given in Table 1, pitches that are multiples of the corresponding pitches may be used provided that these multiples are among the pitches listed in Table 1. For example, for an M10 tee slot, pitches of 50 mm, 100 mm (50 2), 200 mm (50 4) etc. are allowed,
22、but a pitch of 150 mm (50 3) is not allowed since it does not appear in column 14 of Table 1. 6 Tee bolts and tee nuts Tee bolts shall be cold forged and shall have square heads. NOTEA suitable material is steel 945M38 as specified in BS 970-1 or one having at least equivalent mechanical properties.
23、 Tee nuts shall be manufactured from steel 945M38 as specified in BS 970-1 or one having at least equivalent mechanical properties. The dimensions of tee bolts and tee nuts shall be as given in Table 3. The load bearing faces of the heads of tee bolts and tee nuts shall be nominally square with the
24、axis of the shank, and the head shall be nominally central with the shank. The tolerances on the squareness of the heads that are used commercially by the manufacturers of the steel bars shall apply. 7 Tenons Tenons shall be manufactured from steel 045M10 as specified in BS 970-1 or one having at le
25、ast equivalent mechanical properties. The dimensions of tenons shall be as given in Table 4. The faces of the locating surfaces of tenons shall be square and/or parallel with the vertical axis of the tenon and shall be central with the shank where applicable. NOTEIf desired unstepped tenons may be u
26、sed; in which case the feature provided by dimension W is omitted, but P is unchanged. 8 Marking The following information shall be permanently and legibly marked on tee nuts and tenons: a) the number and date of this British Standard, i.e. BS 2485:19871); b) the designation (see clause 2). NOTESimi
27、lar marking of tee bolts is subject to agreement between the manufacturer and the purchaser. 1) Marking BS 2485:1987 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the st
28、andard. The accuracy of the claim is therefore solely the responsibility of the person making the claim. Such a declaration is not to be confused with third party certification of conformity, which may also be desirable. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006,
29、 Uncontrolled Copy, (c) BSI BS 2485:1987 2 BSI 02-2000 Table 1 Dimensions of tee slot profile (in mm) (see Figure 1) Figure 1 Tee slot profile 1234567891011121314 Designation of tee slot Width of throat, A1 Width of recess, B1 (see note 1) Depth of recess, C1 (see note 1) Overall depth of tee slot,
30、H Chamfer 45 or radius Pitch, P (see note 2 and for tolerances Table 2) Nominal Ordinary tolerance H12a For use as tenon tolerance H8a KFG min. max. min. max. min. max. max. max. max. M45+0.12+0.01810113.54.5810202532 M56001112.5561113253240 M68+0.15+0.02214.5 16781518 1 0.6 1324050 M810001618172140
31、5063 M1012 +0.18 0 +0.027 0 1921892025(40)506380 M121423259112328(50)6380 100 M16183032121430361.6(63)80 100 125 M2022+0.21+0.033374016183845 1.6(80) 100 125 160 M24280046502022485612.5100 125 160 200 M3036 +0.25 0 +0.039 0 566025286171125 160 200 250 M3642687232357485 2.51.64160 200 250 320 M424880
32、853640849526200 250 320 400 M4854 +0.30 0 +0.046 0 9095404494106250 320 400 500 NOTE 1The limits of size of the recess B1 and C1 have been selected to obtain reasonable service from tee slot cutters. The maximum dimensions given in columns 6 and 8 are the dimensions that new cutters should be design
33、ed to give; cutters should not be ground so as to give dimensions less than the minimum dimensions given in columns 5 and 7. NOTE 2The pitches shown in parentheses should be avoided owing to the smaller thickness of material between the tee slots (Pmin B1 max). a See BS 4500-1. Licensed Copy: sheffi
34、eldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1987 BSI 02-20003 Table 2 Tolerances on pitches of tee slots Pitch, PTolerance mmmm 20 and 25 0.2 32 to 100 0.3 125 to 250 0.5 320 to 500 0.8 NOTEThe tolerance on the pitch of any tee slot is non-cumulative
35、. Figure 2 Tee nut Figure 3 Tee bolt Figure 4 Tenon Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1987 4 BSI 02-2000 Table 3 Dimensions of tee bolts and tee nuts (in mm) (see Figure 2 and Figure 3) 1234567891011121314 Designation o
36、f tee bolt and diameter of thread, K Width of head (square), B2 Depth of head C2 tol. 0.25 Length of shoulder, Na Diameter of bolt, A2 Chamfer, Ea Radius, Ra Width of tee nut shank, Ga Height of tee nut, Ha Chamfer, F Recommended length of bolt stem, La Length of threaded portion of bolt stem, Ma no
37、m.tol.max.nom.tol.max.max. M492.545630 40 50 60 70 80 100 M5104560.3830 40 50 60 70 80 100For L u 100 M = 0.5 L M61366 1 80.5 1060 70 80 100 M81568101260 70 80 100 M1018710121660 70 80 100 125 160 180For L 100 M = 0.3 L M122281214 0.3 0.6 190.370 80 100 125 160 180 M1628 0 0.5 10161182570 80 100 125
38、 160 180 200 250 300 M2034142022304570 80 100 125 160 180 200 250 300 M2443182026b1.52840 M3053232033b3645 M3664282539b420.4 55100 125 160 180 200 250 300 M4275322546b 2.5 480.7 65 M4885363052b540.4 75 0.8 a Not quoted in ISO 299. b Tolerance 0.25. ISO 299 specifies A 2 as equal to K but in this sta
39、ndard A2 has been increased to give better symmetry of bearing surfaces. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1987 BSI 02-20005 Table 4 Dimensions of tenons (in mm) (see Figure 4) 12345678910111213 Designation of tee slot
40、Width of tenon shank, B2 Overall width of tenon, W Depth of head of tenon, Q Overall height of tenon, P Length of tenon, L Radius, R max. Fixing hole To suit socket head cap screw to BS 4168-1 Clearance hole dia., A to BS 4186 medium fit Counter-bore dia., B Tolerance H13a Counter-bore depth, D Tole
41、rance Nominal Tolerance h7a Nominal Tolerance h7a M45 0 0.012 M22.44.32.5 M560 0.015 160 0.018 51025 0.6 M68M33.46.03.5 M810 0 0.018 0 0.021 M1012305.51230 M1214M66.611.06.5 M1618 M2022 0 0.021 1 M2428500 0.025 153040 M3036 0 0.025 M3642 70 M4248 0 0.030 2540601.5M89.014.08.5 M4854 0 0.030 a See BS
42、4500-1. +0.2 0 Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1987 BSI 02-2000 Publications referred to BS 970, Speci
43、fication for wrought steels for mechanical and allied engineering purposes. BS 970-1, General inspection and testing procedures and specific requirements for carbon, carbon manganese, alloy and stainless steels. BS 4168, Hexagon socket screws and wrench keys: metric series. BS 4168-1, Specification
44、for hexagon socket head cap screws. BS 4186, Specification for clearance holes for metric bolts and screws. BS 4500, ISO limits and fits. BS 4500-1, General tolerances and deviations. Licensed Copy: sheffieldun sheffieldun, na, Tue Nov 28 13:51:34 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 2485:1
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