1、AMERICAN NATIONAL STANDARD Spindle Noses and Tool Shanks for Horizontal Boring Machines ANSI 85.40 - 1977 (REVISION OF B5.40-1968) Reaffirmed 1984 SECRETARIAT SOCIETY OF AUTOMOTIVE ENGINEERS SOCIETY OF MANUFACTURING ENGINEERS NATIONAL MACHINE TOOL BUILDERS ASSOCIATION THE AMERICAN SOCIETY OF MECHANI
2、CAL ENGINEERS PUBLISHED BY THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS United Engineering Center 345 East 47th Street New York, N. Y. 1001 7 No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.
3、 THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Copyright 0 1977 by All Rights Reserved Printed in U.S.A. FOREWORD The first committee organized to consider standard spindle nose construction for horizontal boring machines was one appointed by the National Machine Tool Builders Association. This was i
4、n the year of 1947. In August of 1948, the ASA was petitioned by this committee to assume responsibility for further work; and in January, 1949, Sectional Committee B5 set up Technical Committee 29 for this purpose. Mr. K. F. Gallimore of Giddings Methods of Driving, Holding and Ejecting 4 Table 2 .
5、 Tape A: Taper Drive with Shank Retained by Keeper Key . 5 KeeperKey 6 KeeperKey 7 KeeperKey 8 KeeperKey 9 KeeperKey 10 DrawBolt . 11 DrawBolt . 12 DrawBolt . 13 DrawBolt . 14 DrawBolt . 15 DrawBolt . 16 Tool Shank for Type A, B,Cl, C2, and D 17 Appendix A1 . Type E: Slot Nose Drive with Tang 18 App
6、endix A2 . Type E: Shank for Slot Nose Drive 19 Appendix A3 . Conversion Tables from Inch to Millimeter . 20 Table 3 . Shank for Type A: Taper Drive with Shank Retained by Table 4 . Type B: Key Drive with Shank Retained by Table 5 . Shank for Type B: Key Drive with Shank Retained by Table 6 . Type C
7、1: Key Drive with Shank Retained by Table 7 . Shank for Type C 1 : Key Drive with Shank Retained by Table 8 . Type C2: Key Drive with Shank Retained by Table 9 . Shank for Type C2: Key Drive with Shank Retained by Table 10 . Type D: Steep Taper with Key Drive and Table 10A . Type D: Metric Steep Tap
8、er with Key Drive and Table 1 1 . Shank for Type D: Steep Taper with Key Drive and Table 11A . Metric Shank for Type D: Steep Taper with Key Drive and Table 12 . Optional Simultaneous Fits for Spindle Noses and ANSI 85.40-1 977 AMERICAN NATIONAL STANDARD SPINDLE NOSES AND TOOL SHANKS FOR HORIZONTAL
9、BORING MACHINES 1. GENERAL 1 .I Object and Scope This standard establishes (1) the American practice for the construction of spindle noses for horizontal boring machines by showing a number of types of such construction, (2) the important dimensions for self-holding and steep machine tapers as well
10、as drive keys, draw bolts, drift and keeper key slots, bolt circles for face mounting of milling cutters, etc., (3) the corresponding dimensions for the taper shanks for construction of tools (boring bars, arbors, etc.) to fit the spindle nose tapers. The purpose of such construction is to provide a
11、n accurately machined socket to locate tools with means to positively hold them in position in the spindle as will as with means to positively drive the tools. In many of the tables, reference is made to another standard on machine tapers, American National Stan- dard Machine Tapers B5.10-1963 (R197
12、2), in which basic dimensions and tolerances for tapers used in this standard are tabulated. Other tolerances pertaining only to horizontal boring machine spindle noses are given in tables of this standard. The object is to establish data for tapers that will be universally used. Wherever keys are u
13、sed as a driving means, they are detailed completely with the purpose that these per- ishable parts can be made to fit all spindles comply- ing with the standard. Because of the lack of such a standard as this, many spindle nose constructions have appeared and are in use. This standard limits the ac
14、cepted number of constructions; and for those other constructions that have wide use, an appendix is supplied so that di- mensions and tolerances can be applied. 1.2 Definition Horizontal boring machines are built with a num- ber of constructions for the spindle, but in all of them, the spindle itse
15、lf moves out horizontally from the headstock. It may be supported by a rotating sleeve which can also move out horizontally as a quill, or it may be mounted in a square or rectangular ram which moves out horizontally. Perhaps the most com- mon construction is the former, and an attempt will be made
16、in the future to standardize dimensions for the rotating sleeve which supports the spindle, because tools, especially milling cutters, are manufactured to be mounted directly on the sleeve. Another spindle mounting construction for horizontal boring ma- chines, which has greater usage in Europe than
17、 in the U.S., is the face plate drive with or without contin- uous facing slides. Unless there is a demand for it, no attempt will be made to standardize this construction. The types of spindle nose construction herein standardized make use of two series of tapers as defined in American National Sta
18、ndard Machine - Tapers B5.10-1963 (R1972). They are the Self-Hold- ing Taper series and the Steep Taper series. In all types, a means of holding the taper shank securely in the socket is used, either a keeper key or a draw bolt. The driving means of the tool is a variant in the dif- ferent types beg
19、inning with Type A which has only the friction between the self-holding taper socket and shank to transmit driving torque. Types B, C1, and C2 depend on the positive drive from keys embedded in. the spindle nose. Type D is also a positive drive from keys either integral with the spindle or embedded
20、in it; however, the taper is a steep taper. The Appendix shows a third variation of driving meansin Type E. Arbitrarily, this standard shows and recommends spindle nose constructions for sizes of spindles in in- tegral inches, with the exception of the fractional sizes of 2% and 3% inches. There hav
21、e been many variations from this practice, notably 3% and S/16 inches in this country. Spindle diameters in integral millimeters are also recommended for steep taper spindle nose units. Tapers are IS0 297 Standard. Many designs of “Quick Change” constructions using the steep taper series have been e
22、liminated in 1 AMERICAN NATIONAL STANDARD SPINDLE NOSES AND TOOL SHANKS FOR HORIZONTAL BORING MACHINES favor of the standard draw bar construction as shown in ANSI Standard Spindle Noses and Arbors for Mill- ing Machines, B5.18-1972. This is possible because of the wide use of power draw bolt constr
23、uctions using this shank. Shown in this standard are tabulated data for ob- taining simultaneous fits for each of the different types of tapers. The tool shank flange bears against the face of the spindle at the same time as the tool shank taper bears within the spindle taper socket. Such a fit resu
24、lts in the maximum rigidity for the tool shank. Simultaneous fits restrict the amount of “Draw” or axial movement of the tool shank after mating tapered surfaces have contacted. This restric- tion prevents the sticking of the tool shank in the spindle taper socket and is especially desirable when us
25、ing power draw bolts with slow tapers. 1.3 Gaging As stated in American National Standard B5.10- 1963 (R1972), and repeated here, the reference gage for ANSI self-holding tapers and steep tapers is a tapered plug gage for sockets in spindles and tapered ring gage for tools, etc., to fit them. Tables
26、 6, 7, 9, and 10 of American National Standard B5.10-1963 (R1972) give the dimensions and tolerances for plug and ring gages applying to the above mentioned tapers. Reference is made in each of the tables of this standard to the above tables. Special variations of the plug and ring gages must be use
27、d to produce the “Simultaneous Fit.” This variation is shown in Table 12 of this standard. 1.4 Appendix Tables A1 and A2 are a widely used “Slot Nose Drive” construction, but discarded for standardiza- tion in favor of the key drive construction of Type B. Tables A3 and A4 are Type D construction of
28、 inter- mediate sizes which are not standard and their use is to be discouraged, but use has been sufficient to in- clude here for the purpose of standardization of dimensions. 2. NOMENCLATURE 2.1 Basic Size The nominal size from which the limits of size for ANSI 85.40-1977 a dimension are derived b
29、y the application of the al- lowance and tolerance. 2.2 Draw IS the amount of axial movement of the tool shank within the spindle taper socket after the mating tapered surfaces have contacted. 2.3 Drift or Drift Key A flat tapered bar for forcing the taper shank out of its socket. 2.4 Drift Slot A s
30、lot through the socket at the small end of the tapered hole to receive a drift for forcing taper shanks out of the socket. 2.5 Exposed Length The distance the large end of the taper shank pro- jects from the drive socket or large end of the taper ring gage. 2.6 Gage Line The axial position on a tape
31、r where the diameter is equal to the basic large end diameter of the specified taper. 2.7 Keeper Key A method of retaining a shank in the socket by means of a tapered retaining key placed through the shank and spindle. 2.8 Keeper Slot A cross slot in a tool shank or adapter to receive a tapered reta
32、ining key. 2.9 Key Drive A method of driving the tool by an external rect- angular key. 2.10 Morse Taper A system of tapers originated by the Morse Twist Drill and Machine Company with a nominal taper per foot of inch, on which ANSI Tapers Numbers 4, 5,6, and 7 are based. 2.11 Over-all Length of Sha
33、nk Total length from large end of taper to end of tang. 2 AMERICAN NATIONAL STANDARD SPINDLE NOSES AND TOOL SHANKS FOR HORIZONTAL BORING MACHINES ANSI B5.40-1977 2.12 Self-Holding Taper A taper with an angle small enough to hold a shank in place ordinarily by friction without other holding means (so
34、metimes referred to as slow taper) and one which insures the rotation of the tool with the socket. 2.13 Simultaneous Fit Special tolerances and dimensions applied to tool shank and spindle taper socket. The resulting con- struction allows the tool shank taper to make initial contact with the spindle
35、 taper socket, and upon tight- ening by draw bolt, front spindle bolts, or keeper key, the back flange of the tool is drawn tight against the front spindle face. 2.14 Slot Nose Drive Spindle nose construction with integral projections standing out from the gage line to drive tools with corresponding
36、 flats. 2.15 Socket The part of a machine tool spindle or adapter which is designed to receive and locate the tapered shank of a tool, or arbor. 2.16 Spindle The cylindrical tool holding part of a horizontal boring machine in which the various types of nose constructions, as described in this standa
37、rd, are used. 2.17 Spindle Sleeve The cylindrical rotating part of a horizontal boring machine spindle construction mounted in bearings through which the spindle moves horizontally in and out. It projects and usually carries driving keys and tapped hole patterns for bolting tools or attachments. 2.1
38、8 Stand Out The distance which keys extend in front of the gage line. 2.19 Steep Taper A taper having an angle sufficiently large to insure the easy or self-releasing feature. 2.20 Tang (Tongue) The flattened end of a taper shank. 2.21 Taper per Foot The difference in diameter between two points 12
39、inches apart measured along the axis. 2.22 Taper Shank The tapefed part of a tool which serves to center the tool in a socket. 2.23 Tolerance The total amount of variation permitted in the size of a part. 3 AMERICAN NATIONAL STANDARD SPINDLE NOSES AND TOOL SHANKS FOR HORIZONTAL BORING MACHINES ANSI
40、85.40-1977 Table 1 Tapers Used in Horizontal Boring Machines Shanks; Methods of Driving, Holding and Ejecting No. Taper Taper Taper per per of Inch Foot 4 5 0.051938 0.62326 0.052138 0.62565 6 0.052626 0.63151 7 0.62400 0.052000 200 250 300 350 400 450 500 40 45 50 55 60 3.500 0.291667 3.500 0.29166
41、7 3.500 0.291667 3.500 0.291667 3.500 0.291667 Diameter at Origin of Gage Line Series I 1.23100 1 i74800 Taper 2.49400 Morse 3.27000 Series 2 .ooo 2.500 3 .OOO 3.500 4 .OOO 4 500 5.000 1.750 2.250 2.750 3.500 4.250 X Inch per Foot Taper Series NMTBA Milling Machine Taper Series Method Of: Driving Re
42、taining Shank Shank Spindle Ejection Diameter Taper Self- Inches :; Drift F:y Holding Key Taper Table Number 2.5.3 2.4 2.4 24 4 2 4,5 2,4 2.4 2.4 4 2 3.4 2,4 2.4 2.4 4 2 5.6.7.8. 9,10,12 4 2.4 2.4 2.4 4 8 6 8 6 6.8 6.8 8.9.10.1 2 8 6 a 6 6.8 6.8 5.6.7 8 6 8 6 6,8 6.8 5 8 6 a 6 6.8 6.8 9 6 6 6 6 12 6
43、 6 6 6 10 6 6 6 6 2.5,3,3.5 10 10 10 8,10,12 10 10 10 6 10 10 10 4,5.6.7 10 10 10 4 10 10 10 Calculated from taper foot which is basic. The basic diameter at gage line is at or near large end of taper. All dimensions given in inches. Basic dimensions in Tables 2 through 11 are taken from Tables of A
44、merican National Standard Machine Tapers, 65.10-1963 (R1972). 4 AMERICAN NATIONAL STANDARD SPINDLE NOSES AND TOOL SHANKS FOR HORIZONTAL BORING MACHINES ANSI B5.40-1977 SPINDLE DIA Table 2 Type A: Taper Drive with Shank Retained by Keeper Key Diameter Spindle 2.5 3 4 5 6 Taper I Diameter of Tapered a
45、t Gage Min. Depth No. Hole Line A K 4 10.08 3.270 7 10.08 3.270 7 7.33 2.494 6 5.25 1.748 5 4.12 1.231 Taper Socket Drift Slot Keeper Slot Gaga Line to Front Width Length to Front Length Width Gage Line of Slot of Slot M N 2 Y 0 N 3.88 0.484 0.766 1.81 2.62 2.62 1.156 9.50 0.766 1.81 2.62 2.62 1.156
46、 9.50 0.64 1 1.75 2.25 1.75 0.781 7 .OO 0.516 1.50 2.1 2 1.50 0.656 4.94 0.391 1.25 1.50 1.25 All dimensions given in inches. See Table (6) American National Standard 65.10-1963 (R1972) for Plug Gage Dimensions. Edges at extreme sides of Slots (N) and (N) shall be chamfered at 450 - 0.06 inch deep.
47、NOTES 1. Type A Construction not recommended for Spindle diameters over 6 inches. 2. Type A Construction is recommended for drilling and boring Spindles only. 3. These Taper Sockets are identical with Taper Sockets shown in Table (3) American National Standard 85.10-1963 (R1972). TOLERANCES (A) Diam
48、eter of Hole at Gage Line + 0.000 - 0.002 (N) and (N) width No. 4 and No. 5 Taper + 0.006 - 0.000 No. 6 and No. 7 Taper + 0.008 - 0.000 (N) and (N) centrality with centerline of Taper Hole Taper Tolerance on Rate of Taper to be 0.001 inch per ft applied only in the direction which decreases Rate of
49、Taper. Two digit decimal Dimensions f 0.010 unless otherwise specified. 0.005 total indicator variation. AMERICAN NATIONAL STANDARD SPINDLE NOSES AND TOOL SHANKS FOR HORIZONTAL BORING MACHINES ANSI 85.40-1977 GAGE LINE- t -TAPER - 1.75 INCH PER FT- U Table 3 Shank for Type A: Taper Drive with Shank Retained by Keeper Key Taper Keeper SlotZ Shank Diameter at Gage to End Width Length to Bottom Radius Width of Length Thick- n Gage Line Gage Line Radius No. Length Line of Slot Cutter of Shank A X I N J I Y H G F E C B 4 I 1.231 I 0.25 I 4.62 1 0.469 I 0.62 I 0.31 I 0.9
