1、BRITISH STANDARD BS 1935:1972 Incorporating Amendment Nos. 1, 2 and 3 Specification for Spindle noses and adjustable adaptors for multi-spindle headsBS1935:1972 This British Standard, having been approved by the MechanicalEngineering IndustryStandards Committee, was published under the authorityof t
2、he Executive Boardon 28 April 1972 BSI 02-2000 First published January 1953 First revision April 1972 The following BSI references relate to the work on this standard: Committee references MEE/6 and MEE/6/14 Drafts for comment 69/28955 and69/28956 ISBN 0 580 06509 X Co-operating organizations The Me
3、chanical Engineering Industry Standards Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: The Government departments and scientific and industrial organizations mar
4、ked with an asterisk in the above list, together with the following, were directly represented on the committee entrusted with the preparation of this British Standard: Associated Offices Technical Committee Engineering Equipment Users Association Association of Consulting Engineers Gas Council Asso
5、ciation of Hydraulic Equipment Institution of Civil Engineers Manufacturers Ltd. Institution of Gas Engineers Association of Mining Electrical and Institution of Heating and Ventilating Mechanical Engineers Engineers British Chemical Plant Manufacturers Institution of Mechanical Engineers* Associati
6、on Institution of Mechanical Engineers British Compressed Air Society (Automobile Division) British Electrical and Allied Manufacturers Institution of Plant Engineers Association* Institution of Production Engineers* British Gear Manufacturers Association Locomotive and Allied Manufacturers British
7、Internal Combustion Engine Association of Great Britain Manufacturers Association London Transport Executive British Mechanical Engineering Confederation Machine Tool Trades Association* British Pump Manufacturers Association Ministry of Defence British Steel Industry* Ministry of Defence, Army Depa
8、rtment* Crown Agents for Oversea Governments and National Coal Board Administrations National Physical Laboratory (Department of Department of Employment and Productivity Trade and Industry) (H.M. Factory Inspectorate) Royal Institute of British Architects Department of the Environment* Telecommunic
9、ations Engineering Department of Trade and Industry* Manufacturing Association Department of Trade and Industry National Water-tube Boilermakers Association Engineering Laboratory Electricity Council, the Central Electricity Generating Board and the Area Boards in England and Wales Association of Sc
10、ientific, Technical & Society of Motor Manufacturers and Traders Managerial Staffs Ltd. Gauge and Toolmakers Association Standards Associates Machine Tool Industry Research Association Trades Union Congress Ministry of Aviation Supply University of Aston in Birmingham Ministry of Defence, Air Force
11、Department University of Manchester Institute of Science Ministry of Defence, Navy Department and Technology National Federation of Engineers Tool Manufacturers Individual experts Amendments issued since publication Amd. No. Date of issue Comments 1969 May 1976 2454 February 1978 4990 February 1986
12、Indicated by a sideline in the marginBS1935:1972 BSI 02-2000 i Contents Page Co-operating organizations Inside front cover Foreword ii 1 Scope 1 2 Spindle noses 1 3 Adjustable adaptors 5 Figure 1 Spindle noses for multi-spindle heads 2 Figure 2 Testing of spindle nose bore concentricity and alignmen
13、t 4 Figure 3 Testing of spindle nose concentricity and squareness 4 Figure 4 Type A short adaptor 6 Figure 5 Type B long adaptor 6 Figure 6 Type C stepped adaptor 6 Figure 7 Typical design of locking nut 8 Table 1 Dimensions of spindle noses for multi-spindle heads 3 Table 2 Tolerances for spindle n
14、ose bore concentricity and alignment 4 Table 3 Dimensions of adjustable adaptors types A, B and C 7 Table 4 Dimensions of adjustment nuts for adaptors types A, B and C 8BS1935:1972 ii BSI 02-2000 Foreword This standard makes reference to the following British Standards: BS 1660, Machine tapers. BS 1
15、759, Knurling wheels. BS 3643, ISO metric screw threads Part 2: Limits and tolerances for coarse pitch series threads. BS 4168, Hexagon socket screws and wrench keys metric series. BS ., Trapezoidal threads 1) . This British Standard has been prepared under the authority of the Mechanical Engineerin
16、g Industry Standards Committee and is based on proposals submitted by the Machine Tool Trades Association (M.T.T.A.). In preparing this standard account has been taken of related International Organization for Standardization (ISO) work currently in hand. Oil sealing is not covered by ISO work. The
17、spindle nose dimensions specified in this standard are similar to those in German Standard DIN55058 “Drilling spindle heads”, and permit the use of adjustable adaptors produced to DIN6327 “Adaptors”. Three types of adaptor are included in this standard as well as a single type of lock nut. All three
18、 types of adaptor produced to this standard are interchangeable with but not identical to those produced to DIN6327. 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
19、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, pages1 to 8 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This
20、will be indicated in the amendment table on the inside front cover. 1) In course of preparation.BS1935:1972 BSI 02-2000 1 1 Scope This British Standard specifies dimensional and accuracy requirements for spindle noses for the receipt of adjustable and quick change adaptors for use in multi-spindle h
21、eads. The standard specifies requirements for three types of adjustable adaptors for the receipt of taper shank drills, reamers and spot facing cutters, for use in multi-spindle machines or heads. NOTEThe titles of the British Standards referred to in this standard are listed on page ii. 2 Spindle n
22、oses 2.1 Nominal sizes The nominal size of the spindle nose shall be its nominal bore, which shall be identical with the nominal diameter of the adaptor with which it is to be used. The range of nominal sizes is: 16, 20, 25, 28, 36 and 48 mm. The 25 mm size is non-preferred. 2.2 Interchangeability S
23、pindle noses shall be capable of accepting adjustable adaptors produced in accordance with3. 2.3 Dimensions Dimensions shall comply with the details given inTable 1. 2.4 Material 2.4.1 The spindles shall be manufactured from alloy steel which when suitably heat treated shall have a tensile strength
24、of from 685 N/mm 2to 785 N/mm 22) . 2.4.2 The bearing and oil seal diameters and thrust faces and at least the first25mm length of the nose shall be heat treated to give a hardness within the range of45to50HRC (440 to505HV30). 2.5 Drift slots Drift slots may be provided either for the purpose of rem
25、oving tools with the adjustable adaptor still in the spindle nose or for removing the adjustable adaptor itself. Where drift slots are provided they shall be as shown in the tables, and at90 from the keyway. Slots to these dimensions are suitable for adaptor removal. 2.6 Surface texture The spindle
26、nose bore, bearing and oil seal surfaces shall not be rougher than0.44m R a . Other surfaces shall not be rougher than0.84m R a . 2.7 Chamfers Chamfers shall be produced on the inside and outside diameters of the spindle nose as indicated, as well as on the edges of the drift slots, where applicable
27、. 2.8 Locking screw A grub screw conforming to BS4168 tolerance class6gexternal for locking the adaptor into the spindle nose shall be provided at180 from the keyway as indicated. A second grub screw13mm in from the first is optional. For details of corresponding thread in spindle nose seeTable 1. G
28、rub screws shall be reduced in length if necessary so that they do not protrude when an adaptor is gripped. 2.9 Length of nose Basic lengths of nose are specified inTable 1. Where longer noses are required preferred increments of10mm shall be used. If external oil seals are not required the basic mi
29、nimum nose lengths may be reduced by10mm. 2.10 Keyway A keyway to accept the Woodruff key of the appropriate adjustable adaptor shall be provided as shown in the tables. 2.11 Accuracy 2.11.1 A suggested method of mounting the spindles for accuracy tests is with the bearing diameter resting in V-bloc
30、ks as shown inFigure 2 andFigure 3. 2.11.2 Bore concentricity and axial alignment may be determined by inserting into the spindle bore a suitable close fitting test bar and taking readings at positions shown inFigure 2 at distances Z and Z 1 . Deviation shall not exceed the values given inTable 2. 2
31、.11.3 Oil seal diameter concentricity may be determined by direct readings on the diameter as shown inFigure 3. The deviation shall not exceed the values given inTable 2. 2) 1 N/mm 2= 1 MN/m 2 .BS1935:1972 2 BSI 02-2000 2.11.4 Nose outside diameter concentricity (only where required for quick change
32、 adaptors) may be determined by a direct reading on the diameter as shown inFigure 3. The deviation shall not exceed the values given inTable 2. 2.11.5 The squareness of the thrust faces A and B (seeFigure 3) may be determined by direct readings taken at positions equal to E 2mm and B 2mm, respectiv
33、ely. For faces A and B the deviations shall not exceed the values given inTable 2. 2.12 Oil seal 2.12.1 External oil seals are preferred. Internal oil seals should only be used in cases where circumstances preclude the use of external seals. According to which oil seal is chosen, external or interna
34、l, the unused diameter E or D need not be toleranced. If an internal oil seal is used, the external seating diameter D need not be produced. Figure 1 Spindle noses for multi-spindle heads (seeTable 1)BS 1935:1972 BSI 02-2000 3 Table 1 (See Figure 1) Dimensions of spindle noses for multi-spindle head
35、s All dimensions are in millimetres. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 24 25 26 27 Bore diameter Nose diameter Oil seal diameter c Vent Internal relief Locking screw Keyway Drift slot (optional) Nominal adaptor size Nominal size Tolerance H7 Nominal size Tolerance f7 b Diamete
36、r over chamfer External Tolerance Internal Tolerance Hole diameter Hole position Distance form nose (min.) Diameter Length Internal thread details Tol. Class 6H BS 3643-2 Distance from nose Socket screw details Minimum spindle nose length d Width Tolerance Depth across bore Keyway radius Length Widt
37、h Distance from nose A B C D E F G H J K L M 0.1 N P Tol. C11 Q +0.3 0 R S T U +0.018 0.020 0 0 +0.145 16 16 25 24 28 22 6 70 74 16.4 8 M6 1.0P 34 M6 6 100 5 17.3 0.2 40 7 30 0 0.041 0.080 0.080 +0.070 +0.021 0.025 0 0 +0.145 20 20 32 31 35 25 6 73 77 20.4 8 M6 1.0P 34 M6 6 100 5 21.3 0.2 43 7 30 0
38、0.050 0.080 0.080 +0.070 +0.021 0.025 0 0 +0.145 a 25 a 25 37 36 40 35 8 80 85 25.4 10 M8 1.25P 38 M8 6 110 6 26.7 0.4 50 9 30 0 0.050 0.080 0.080 +0.070 +0.021 0.025 0 0 +0.145 28 28 40 39 45 35 8 80 85 28.4 10 M8 1.25P 38 M8 8 110 6 29.7 0.4 50 9 30 0 0.050 0.080 0.080 +0.070 +0.025 0.025 0 0 +0.1
39、70 36 36 50 49 55 45 10 101 106 36.6 10 M8 1.25P 45 M8 8 130 8 37.7 0.4 65 9 35 0 0.050 0.080 0.080 +0.080 +0.025 0.030 0 0 +0.170 48 48 67 66 70 45 12 123 129 48.6 12 M10 1.5P 57 M10 10 160 10 50.1 0.4 85 13 40 0 0.060 0.080 0.080 +0.080 a Non-preferred. b Tolerance specified is required only if qu
40、ick change adaptors are to be used. c If an external oil seal is specified, multi-head casing face position is unchanged. d See2.9.BS1935:1972 4 BSI 02-2000 Table 2 (SeeFigure 2 andFigure 3) Tolerances for spindle nose bore concentricity and alignment Figure 2 Testing of spindle nose bore concentric
41、ity and alignment Figure 3 Testing of spindle nose concentricity and squareness All dimensions are in millimetres. 1 2 3 4 5 6 7 8 Dial indicator (1) (2) (3) (4) (5) (6) (7) FIM (full indicator movement) (max.) 0.015 0.030 0.08 0.08 0.05 0.008 0.02BS1935:1972 BSI 02-2000 5 3 Adjustable adaptors 3.1
42、Nominal sizes The nominal size of an adaptor shall be the nominal outside diameter, which shall be identical with the nominal bore of the spindle nose with which it is to be used. The range of nominal sizes specified in this standard is: 16, 20, 25, 28, 36 and 48 mm. The 25 mm size is non-preferred.
43、 3.2 Interchangeability Adaptors shall be capable of fitting to spindle noses manufactured in accordance with2. 3.3 Dimensions Dimensions shall comply with the details given inTable 3 andTable 4. 3.4 Material The adaptor body and nut shall be manufactured from material which when suitably heat treat
44、ed shall have a tensile strength of1250N/mm 2to1350N/mm 2and a hardness within the range of40to50HRC (380to505HV30). 3.5 Threads The threads shall be in accordance with BS 3) , “Trapezoidal threads” having a 30 inclusive flank angle. The 16mm size adaptor shall have a1.5mm pitch but all other sizes
45、shall have a2mm pitch. 3.6 Bore taper The bore of the adaptor body shall be tapered in accordance with BS1660. 3.7 Drift slot 3.7.1 A drift slot corresponding to the appropriate Morse taper shall be provided at90 from the Woodruff key, to dimensions shown in BS1660. 3.7.2 The centrality of the drift
46、 slot shall be as given in BS1660. 3.8 Chamfers Chamfers shall be produced at each end of the adaptor body, at the mouth of the taper bore and at the edges of the drift slot. In addition a suitable form of leadin should be machined on the closed end of the adaptor body, to facilitate insertion into
47、the spindle nose. 3.9 Locking flat A flat for the purpose of locking the adaptor into the spindle nose by means of a hexagonal socket set screw conforming to BS4168 shall be produced on the adaptor body at180 from the Woodruff key. 3.10 Adjusting nut 3.10.1 The outermost diameter of adjusting nut sh
48、all be knurled in accordance with the provisions for medium grade knurling given in BS1759. 3.10.2 The adjusting nut shall be capable of being locked in position with a socket set screw which shall not act directly onto the trapezoidal thread of the adaptor. The set screw shall conform to BS4168. 3.
49、10.3 Tommy bar or C-spanner holes may be provided to facilitate adjustment. 3.11 Locking screw For reasons of safety, it is important that the locking screw when tightened shall not protrude beyond the outside diameter of the knurled portion of the nut. Therefore locking screws shall be reduced in length if necessary so that they do not protrude when the nut is locked. 3.12 Marking The body shall be marked with the nominal size of the adaptor and the number of its Morse tape
