1、AMERICAN NATIONAL STANDARD Milling Machine Arbor Assemblies ANSI B5.47 - 1972 REAFFIRMED 1991 FOR CURRENT COMMITTEE PERSONNEL PLEASE SEE ASME MANUAL AS-1 1 bUCltlY Ut- AUIUMUIIVt ENGINEERS SOCIETY OF MANUFACTURING ENGINEERS NATIONAL MACHINE TOOL BUILDERS ASSOCIATION THE AMERICAN SOCIETY OF MECHANICA
2、L ENGINEERS PUBLISHED BY THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS United Engineering Center 345 East 47th Street New York, N. Y. 1001 7 Any part of this Standard may be quoted. Lines should read: “Extracted from American National Standard Milling Machine Arbor Assemblies, ANSI B5.47 - 1972 with
3、permission of the publisher, The American Society of Mechanical Engineers, United Engineering Center, 345 East 47th Street, New York, N. Y. 10017.” Copyright, , 1972 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Printed in USA FOREWORD The American National Standard on “Spindle Noses and Arbors fo
4、r Milling Machines” ANSI B5.18-1960, has served the requirements of industry well in the past. This standard has also found wide international acceptance with only minor modifications. Countries outside the United States became aware of the need to develop standards for milling machine accessories w
5、ith shanks which fit into the spindle noses of milring machine and other equipment having spindles made according to ANSI B5.18-1960. The American National Standard as published, in spite of its title “Spindle Noses and Arbors for Milling Machines” covers only the relation between the spindle nose a
6、nd arbor shank but does not deal with complete milling machine accessories. In 1962, The Society of Manu- facturing Engineers suggested to The American Society of Mechanical Engineers and to Standards Committee B5, in particular, the need for standardization of at least one complete milling machine
7、accessory, namely the so-called “Milling Machine Arbor”. It was suggested that this matter be made a subject of investi- gation by a technical committee to arrive at a standard. Considerable preliminary work was done by members of the Standards Committee of the Chicago Chapter of SME. This study cov
8、ered a review of existing American manufacturers standards and also made comparisons with proposed and/or adopted ISO, British, and German DIN standards. The taper shank of the majority of milling machine arbors currently used is made according to ANSI B5.18-1960. The use of the standard as it relat
9、es to the standardization of the shaft, the spacing collars, bearing sleeve, nut, etc. is recommended in all cases where shanks other than ANSI B5.18-1960 are contemplated to be used. ber 15, 1972. This standard was approved as the American National Standard on Septem- iii AMERICAN NATIONAL STANDARD
10、S COMMITTEE 85 MACHINE TOOLS, COMPONENTS, ELEMENTS, PERFORMANCE AND EQUIPMENT (The following is the roster of the Committee at the time of approval of this standard) OFFICERS W. L. McCann, Chairman A. W. Colton, Vice Chairman (Group A) C. T. Blake, Vice Chairman (Group B) *Paul Ackermann, Vice Chair
11、man (Group C) Harold Cooper, Vice Chairman (Group D) E. J. Loeffler, Secretary STANDARDS COMMITTEE AMERICAN SOCIETY OF MECHANICAL ENGINEERS (THE) F. Steele Blackall, 111, The Taft-Peirce Manufacturing Company, Woonsocket, Rhode Island C. T. Blake, The Warner & Swasey Company, Cleveland, Ohio W. L. M
12、cCann, Giddings & Lewis, Inc., Fond du Lac, Wisconsin DEFENSE INDUSTRIAL PLANT EQUIPMENT CENTER W. J. Taylor, Memphis, Tennessee R. T. Hoffman, Alternate, Memphis, Tennessee NATIONAL MACHINE TOOL BUILDERS ASSOCIATION Charles Brien, Bullard Company, Bridgeport, Connecticut E. J. Loeffler, National Ma
13、chine Tool Builders Association E. A. Munschauer, Jr., Niagara Machine & Tool Works, Buffalo, N.Y. SOCIETY OF AUTOMOTIVE ENGINEERS A. J. McLaren, The Cross Company, Fraser, Michigan W. H. Seacord, International Harvester Company, Chicago, Illinois SOCIETY OF MANUFACTURING ENGINEERS Richard Pugh, Jon
14、es & Lamson. Springfield. Vermont J. J. Fickers, Alternate, Westinghouse Electric Corporation, Mansfield, Ohio SOCKET SCREW PRODUCTS BUREAU Paul Pick, Hartford, Connecticut TELEPHONE GROUP M. C. Berryman, Western Electric Company, Chicago, Illinois 5. P. Rogacki, Alternate, Western Electric Company.
15、 Kearney, New Jersey U.S. DEPARTMENT OF AIR FORCE VACANT U.S. DEPARTMENT OF THE ARMY R. K. Freeman, Liaison, Department of Army, Weapons Command, Rock Island. Illinois J. N. Segura, Alternate, U.S. Army, Weapons Command, Rock Island. Illinois U.S DEPARTMENT OF COMMERCE W. 0. BottamiIler, (deceased),
16、 The National Bureau of Standards, Washington, D.C. U.S. DEPARTMENT OF NAVY J. N. Cornette, Liaison, Navy Ship Engineering Center, Washington, D. C. INDIVIDUAL MEMBERS Paul Ackermann, Cincinnati Milacron, Cincinnati, Ohio F. P. Brown, Vienna. Virginia Harold Cooper, Chrysler Corp.,. Detroit, Michiga
17、n Arthur Colton, Grosse Pointe Farms, Michigan H. J. Moffatt, Caterpillar Tractor Company, East Peoria, Illinois Vice-chairman concerned with preparation of this Standard. iv PERSONNEL OF TfCHNlCAL COMMITTEE 33 SPINDLE NOSES AND ARBOR SHANKS FOR MILLING MACHINES 6. R. Better, Chairman, Bendix indust
18、rial Tool Division, 1901 S. Rockwell Street, K. H. Coleman, Lockheed Aircraft Corporation, Burbank Division, Burbank, California W. T. forward, Farrel Corporation, Rochester, New York A. D. Gunderson, Keamy & Trecker Corporation, Milwaukee, Wisconsin J. 0. Snyder, (MATF), AF Material Laboratory, Wri
19、ght-Patterson AFB, Ohio J. c. Starnes, General Dynamics Corporation, Fort Worth, Texas A. W. Todd, Van Norman Machine Company, Springfield, Massachusetts E. L. Watelet, Brown & Sharpe Manufacturing Company, North Kingstown, Mode Island R. 5. Zopf, Westem Electric Company, Hawthorn Works, Chicago, Il
20、linois Chicago, Illinois CONSULTING MEMBERS C. A. Purske, Kearney & Trecker Corporation, Milwaukee, Wisconsin Tom Ribich, Weldon Tool Company, Cleveland, Ohio CONTENTS Page 1 . scope . 1 2 . Definitions . 1 Tables Table 1 . Table 2 . Table 3 . Table 4 . Table 5 . Table 6 . Table 7 . Table 8 . Style
21、A Arbor Shafts . 3 Style B Arbor Shafts 4 . Keyseat and Key Dimensions 5 Essential Dimensions of Bearing Sleeves 6 Essential Dimensions of Shoulder Collars . 7 Essential Dimensions of Stamped Type Spacing Collars 8 Essential Dimensions of Spacing Collars 9 Essential Dimensions of Arbor Nuts . 10 vi
22、i ANSI 65.47-1972 AMERICAN NATIONAL STANDARD MILLING MACHINE ARBOR ASSEMBLIES 1. Scope 1.1 The standard is confined to milling machine arbors. The reason for confining this standard to this specified milling machine accessory is that through many years of development and general usage, there aiready
23、 exists good agreement on the structure and dimensions of milling machine arbors between competent manufacturers of such equipment here in the United States and abroad. This agreement is much better than for many other milling machine accessories and equipment. Already considerable interchangeabilit
24、y exists between the products of various suppliers of milling machine arbors. The standard tries to avoid being too specific in nonessential details to avoid undue hardship on the manufacturer. The choice of material, heat treatment, surface finish any deviations from nonessential dimensions is left
25、 to the discretion of the manufacturer as long as it is compatible with the expected functional re- quirements of the arbor assembly. The many over- lapping and intermediate sizes of the various components of an arbor assembly are minimized for the sake of economy. Some sizes of arbors and component
26、s still listed by some manu- facturers have been omitted with the knowledge that some other listed sizes would do the re- quired operations without undue hardship. True position tolerances and symbols are in accordance with ANSI Y14.5-1966. 2. Definitions 2.1 Arbor Diameter The arbor diameter is the
27、 nominal diameter of the milling machine arbor. It defines the size of the “hole” cutter which can be mounted and driven by the arbor. The arbor diameter size and its tolerance is intended to provide the proper fit and locating accuracy in the bore of the “hole” cutter. 2.2 “Shoulder to Nut” Length
28、The “Shoulder to Nut” length is the length of the arbor available between the.shoulder and the face of the arbor nut. This length is considered the nominal length of the milling machine arbor. 2.3 Pilot The pilot at the end of a style “A” mill- ing machine arbor is provided to give usually smaller m
29、illing machine arbors added support and rigidity. 2.4 Shoulder Collar The shoulder collar is a collar with a larger chamfer on the inner diameter than the spacing collars. This large chamfer is intended to prevent interference with a stress reducing fillet radius at the,shoulder. 2.5 Spacing Collar
30、A spacing collar is a bushing type collar furnished in various lengths. It has an inner diameter to fit with a specified clearance on the arbor diameter, it has a keyway to clear the key in the arbor. The end faces of the spacing collar are required to be parallel within specified limits to avoid di
31、stortion and inaccuracies of the arbor when assembled on the arbor. 2.6 Bearing Sleeve Bearing sleeves act as bearing journals in the bearing supports to give increased rigidity and support to the arbor. The bearing sleeve fits closely on the arbor diameter and in the support bushing. 1 AMERICAN NAT
32、IONAL STANDARD MILLING MACHINE ARBOR ASSEMBLIES ANSI 85.47-1972 2.7 Arbor Nul The arbor nut, when tightened, converts the milling machine arbor, when assembled with the proper collars, cutters, and sleeves into one rigid unit. 2.8 Key - Keyseat The arbor diameter is provided with a Key- seat and a r
33、equired length of keystock to give a driving connection between arbor, cutters, and bearing sleeves. PPORT BUSHIN DIAMETER OF ARBOR SHAFT BUSHING LENGTH SHOULDER TO NUT SIZE NUMBER ARBORS ONLY NOMENCLATURE OF MILLING MACHINE ARBORS STYLE “A” ARBORS HAVE A PILOT BEYOND THREADED END STYLE “B” ARBORS H
34、AVE NO PILOT CODING 0.F MILLING MACHINE ARBORS TAPER SHANK SIZE NUMBER 50 LENGTH DIAMETER AND SHOULDER BEARING SLEEVE STYLE OF ARBOR IDENT. NO. TO NUT IA 4 NUMBER OF BEARING SLEEVE Example 1. 50 1-1/4B 18 4 2, AN Standard No. 50 Taper Shank, 1.250 diameter of arbor shaft, Style B Arbor, 18-inch leng
35、th shoulder to nut, #4 bearing sleeve, 2 bearing sleeves on arbor. Example 2. 40 7/8A 12, AN Standard No. 40 Taper Shank, 0.875 diameter of arbor shaft, Style A Arbor, 12-inch length shoulder to nut, with no bearing sleeves. 2 AMERICAN NATIONAL STANDARD MILLING MACHINE ARBOR ASSEMBLIES ANSI B5.47-19
36、72 (fl E - F 1 ,0005 TOTAL I SIZE NUMBER 101 E-F I ,0002 TOTAL I CENTER Table 1. Style A Arbor Shafts Taper Shank Size No. Arbor Diameter of A Length Shoulder to Nut B Shoulder Thread k 0.02 Length Size Diameter Thread C D G I 30 1.75 1.38 1.000-12 12 10 0.9995 1.62 1.00 0.875-14 10 0.8745 0.8745 1.
37、62 1.00 0.875-14 12 8 40 2.12 1.38 1.000-12 16 12 1.2495 1.75 1.38 1.000-12 16 12 8 0.9995 0.8745 8 10 2.12 1.38 1.000-12 18 12 1.2495 1.75 1.38 1.000-12 18 12 8 0.9995 50 1.62 1.00 0.875-14 12 All dimensions given in Inches. TOLERANCES: - “A” Diameter of Arbor & Pilot Diameter concentric with axis
38、E-F 0.0005 total. Shoulder face perpendicular to axis E-F 0.0002 total. Inspection for Total Indicator Variation to be performed between Centers without assembly of spacing collars and sleeves. Pitch Diameter of Thread concentric with axis E-F 0.002 total. 30-40-50 Taper Shanks - see ANSI 85.18-1972
39、 Spindle Noses & Tool Shanks for Milling Machines. True position tolerances and symbols are in accordance with ANSI Y14.5-1966. 3 AMERICAN NATIONAL STANDARD MILLING MACHINE ARBOR ASSEMBLIES ANSI 85.47-1972 /-ER c SHOULDER FACE (SEE KEYSEAT TABLE 3) u I- F ,0002 TOTAL 1 i _- - -G _- - I BE- F 1 . .00
40、05=1 A - .0005 DIA. + .oooo NUMBER LENGTH SHOULDER TO NUT B UNF - 3A - C RIGHT HAND E- F I ,0002 TOTAL I Table 2. Style B Arbor Shafts I Diameter Taper of Shank Arbor Size No. A -7L- 0.8745 + 0.8745 0.9995 1.2495 0.8745 0.9995 - 8 8 1.2495 1.4995 1.9995 2.4995 8 8 - 8 Length Shoulder to Nut I Thread
41、 I Thread 12 12 12 12 14 12 14 12 12 B 18 . 24 24 24 IC ID Size Length 0.875 - 14 1.38 1.000 - 12 1.00 0.875 - 14 1.00 1,000 - 12 1.38 1.000 - 12 1.38 . 0.875 - 14 , 1.00 1.000 - 12 , 1.38 30 1.000 - 12 1.38 30 36 1.500 - 12 1.88 Shoulder Diameter ?r 0.02 G 1.62 1.75 1.62 1.75 2.12 1.62 1.75 2.12 2.
42、38 3.25 3.50 All dimensions given in Inches. TOLERANCES: “A“ Diameter of Arbor concentric with axis E-F 0.0005 total. Shoulder face perpendicular to axis E-F 0.0002 total. Inspection for Total Indicator Variation to be performed between centerswithout assembly of spacing collars and sleeves. 30-40-5
43、0 Taper Shanks - see ANSI B5.18-1972 Spindle Noses and Tool Shanks for Milling Machines. Pitch Diameter of Thread concentric with axis E-F 0.002 total. True Position tolerances and symbols are in accordance with ANSI Y14.5-1966. 4 AMERICAN NATIONAL STANDARD MILLING MACHINE ARBOR ASSEMBLIES ANSI B5.4
44、7-1972 .OIO TO .025 - R Radius or ARBOR AND KEYSEAT ARBOR AND KEY Table 3. Keyseat and Key Dimensions Nominal F E B A Square Diaqeter Size Key Arbor Nominal Arbor and Keyseat R Arbor and Key Max. 0.87 5 0.1250 0.1250 0.9315 0.1240 0.8075 0.1260 0.9375 0.1245 0.8125 0.03 1.000 0.2500 0.2500 1.3750 0.
45、3120 1.0630 0.3125 1.0880 0.2490 0.8388 0.2510 1.0940 0.2495 0.8438 0.3135 1.0580 0.3115 1.3690 1.2810 1.6500 0.3740 1.2760 0.3760 1.6560 0.3745 0.05 1.250 0.3750 0.3750 1.500 0.3 125 0.06 0.06 - 2.000 0.5 000 0.5 000 1.6870 2.7 100 0.6245 2.0940 0.6250 2.1820 0.4990 1.6820 0.5 01 0 2.1880 0.4995 0.
46、6260 2.0890 0.6240 2.7 120 0.06 2.500 0.6250 0.06 All dimensions are given in Inches. NOTE: The dimensions listed above are from Table 69 of ANSI 894.19-1968, page 79 - Milling Cutters and End Mills. Keyway to be on True Position with axis of Arbor within 0.001 per foot of Arbor length. True positio
47、n tolerances and symbols are in accordance with ANSI Y14.5-1966. TOLERANCES: 5 AMERICAN NATIONAL STANDARD MILLING MACHINE ARBOR ASSEMBLIES ANSI 85.47-1972 U Table 4. Essential Dimensions of Bearing Sleeves Keyseat True Diameter Position Diameter N L E D B A Tolerance Size Number Hole Outside Keyseat
48、 Length 3 4 I 0.8750 I 1.2505 1.8743 1.8738 I 0.8750 w I 1.5005 I I 0.9475 I 0.130 I I 1.395 I 0.343 I 3.23 3.27 0.005 0.005 I 0.9475 I 0.130 I 0.9575 0.137 1.104 0.255 1.114 0.262 0.318 1.395 0.343 1.666 0.385 I 1.676 I 0.410 I I 0.005 t 0.005 0.005 0.010 All dimensions glven in Inches. TOLERANCES:
49、 (B) Outside diameter concentric with (A) hole diameter within 0.0005 total. End faces parallel within 0.0002 total. Runout of end faces to be within 0.0005 total with regard to (A) hole diameter. (E) Keyseat to be on true position with Hole “A” within tolerance N. NOTE: The dimensions listed in column “D” and ” E” are from Table 69 of ANSI 894.19-1968, page 79 - Milling Cutters and (R) Corner radius for (A) 0.8750 max 0.03 1.0000 max 0.05 True pasition tolerances and symbols are in accordance with ANSI Y14.5-1966. 1.2500 and up max 0.06 End Mills.
