ASME B17.1-1967 R2003（键和键槽）

~~~~~ ~~~ INDD B37.3 b7 m 2595532 0078092 003 m ANSI-B17.1 ADOPT ION NOTICE ANSI-B17.1, "Keys and Keyseats," was adopted on October 3, 1994, for use by the Department of Defense (DoD). Proposed changes by DoD activities must be submitted to the DoD Adopting Activity: Commander, Defense Industrial Supply Center, Attn: DISC-EF, Philadelphia, PA 19111-5096. DoD activities may obtain copies of this standard from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094. The private sector and other Government agencies may purchase copies from the American National Standards Institute, 11 West 42nd Street, New York, NY 10036. Custodians: Army - AL Navy - YD1 Air Force - 99 Adopting Activity DLA - IS FSC 5315 DISTRIRUTION STATEMENT A. Approved for public release; distribution is unlimited. U S A S T A N D A R D KEYS AND KEYSEATS USAS B17.1- 1967 S , O i a d O P The American Society of Mechanical Engineers T H E A M E R I C A N S O C I E T Y O F M E C H A N I C A L E N G I N E E R S United Engineer ing Center 345 East 4 7 t h Street N e w Y o r k , N. Y. 10017 ASME B 1 7 . 1 67 0 7 5 7 6 7 0 0 0 4 2 5 2 7 4 = U SA STAN DARD This USA Standard is one of nearly 3000 standards approved as American Standards by the American Standards Association. On August 24, 1966, the.ASA was re- constituted a s the United States of America Standards Institute. Standards approved as American Standards are now designated USA Standards. There is no change in their index identification or technical content. Any part of this standard may be quoted. Credit l ines should read: “Extracted from USA Standard Keys and Keyseats (USAS B17.1-1967), with the permission of the publisher, The American Society of Mechanical Engineers, United Engineering Center, 345 Eas t 47th Street, New York, N.Y. 10017.” UDC 621.886.6 Copyright, 1968, by THE AMERICAN SOCJETY PF MECHANICAL ENGINEERS Printed in U.S.A. - ASME B 2 7 * 2 b7 m 0759670 0042528 b m f . . Foreword T HE individual USA Standards on Keys were first issued in the late 1920's. These were consolidated with the shafting standards in the 1934 publication, Standard Shafting and Stock Keys. A revised i s sue was published in 1943 and withdrawn in 1955 as it was not being sufficiently supported. However, a separate standard on Woodruff Keys, Keyslots, and Cutters (B17f-1930) was reaffirmed in 1955. In i962 the USA Standards Committee B17 was reactivated and a sub- committee developed and established this stan'dard based on current in- dustry standards. Following approval by the USA Standards Committee B17 and the sponsor, the proposed revision was approved on September 15, 1967 by the USA Standards Institute, and designated B17.1-1967. . iii - - ` , ` ` , ` ` , , ` ` , , , , , ` , , , ` ` , , , ` , - ` - ` , , ` , , ` , ` , , ` - - - ASME 617-1 b7 W 0757670 0042527 8 S USA Standards Committee BI7 Keys and Keyseats OF FI% E R S U. P. Jennings, Chaiman Roger Daniels, Secretary COMMITTEE MEMBERS AMERICAN GEAR MANUFACTURERS ASSOCIATION G. L. Scott, American Gear Manufacturers Association, Washington, D.C. D. F. Wild, General Electric Company, Paterson, New Jersey AMERICAN SOCIETY O F MECHANICAL ENGINEERS, THE U. P. Jennings, E. I. DuPont de Nemours & Company, Inc., Wilmington, Delaware W. M. Houck, New Holland Machine Company, New Holland, Pennsylvania R. A. Anderson, Roller Chain Division, Rex Chainbelt Company, Worcester, Massachusetts CONVEYOR EQUIPMENT MANUFACTURERS ASSOCIATION C. R. Davis, Rex Chainbelt Inc., Milwaukee, Wisconsin A. N'. Lemmon, Alternate, The Jeffrey Manufacturing Company, Columbus, Ohio R. C. Sollenberger, Alternate, Conveyor Equipment Manufacturers Association, Washington, D.C. D: C. Currier, Dodge Manufacturing Company, Mishawaka, Indiana AMERICAN SOCIETY O F TOOL AND MANUFACTURING ENGINEERS AMERICAN SPROCKET CHAIN MANUFACTURERS ASSOCIATION MECHANICAL POWER TRANSMISSION ASSOCIATION METAL CUTTING TOOL INSTITUTE Perry L. Houser, Metal Cutting Tool Institute, New York, N.Y. NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION C. F. Schwan, Reliance Electric & Engineering, Cleveland, Ohio SOCIETY O F AUTOMOTIVE ENGINEERS E. J. Flewelling, Massey-Fergusson, Inc., Detroit, Michigan INDIVIDUAL COMPANIES J . W. Gillen, John Gillen Company, Cicero, Illinois G. W. Andrews, Alternate, John Gillen Company, Cicero, Illinois Roger Daniels, Formsprag Company, Warren, Michigan W. C. Sheers, Standard Horse Nail Corporation, New Brighton, Pennsylvania Personnel of Subcommittee 1, Rectangular Keys C. R. Davis, Chaiman, Manager of Engineering, Conveyor Equipment, Rex Chainbelt Inc., 4701 West Greenfietd Avenue, Milwaukee, Wisconsin 53214 J. W- Gillen, President, John Gillen Co., Subsidiary of Stanray Corp., 2540 South 50th Avenue, Cicero, Illinois 60650 C. F. Schwan, Chief Mechanical Engineer, Reliance Electric h Engineering €o., 24701 Euclid Avenue, Cleveland, Ohio 44117 D. F, Wild, Manager-Engineering, Gearmotor Business Section, General Electric Co., 845 Eas t 25th Street, Paterson, New Jersey 07513 Donald C. Currier, Chief of Standards and Statist ics, Dodge Manufacturing Coaporation, Mishawaka, Indiana 46544 i v - f ASME BL7-1 67 = 0759b70 0042530 4 TABLE OF CONTENTS Page 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . . , 1 2. Definitions. . . . . . . _. . . . . . . . .: . . . , . . . .:. . . . . . . . . . . . . . . . . . . . . . 1 1 3. Key Size Versus Shaft Diameter. . . . _. . . . . . . . . . . . . . ~ . . . . . . . . . . . . . . . . 4. Key Dimensions and Tolerances. . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . . . . 3 5 . Depth Control Formulas. . . . . . . . . . . . . . . . . . . , . . . . . . .. . . . . . . . . . . . 5 6. Key-Keyseat Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . 8 7. Alignment Tolerances. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 8. Chamfered Keys and Filleted Keyseats. . . . . . . . . . . . . . . a . . . . . . . . . . . . . . 11 9. Set Screws For Use Over Keys. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Table 1 Key SizeVersus Shaft Diameter. . . . . . . . . . . . . . . - . . . . . . . . . . . . . . . 2 Table 2 Key Dimensions and Tolerances. . . . . . . . . . . . . . . . .. . . . . , . . . . . . . . . 3 Table2A Gib Head Nominal Dimensions . . . . . . . . . . . 4 Table 3 Depth Control Values-Values for S and T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 4 Class 1 -Fit for Parallel Ke-ys . . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 5 Class 2 -F i t for Parallel and Taper Keys. . a . . . . . . . . . . . . . . . . . . . . . 9 Table 6 Keyseat Tolerances for Electric Motor and Generator Shaft Extensions . . . . . 9 Table 7 Suggested Fillet Radii and Key Chamfer.. . . . . . . . . . . . . . . . . . . . . . . . . , . . . . 11 Table 8 Set Screws for Use Over Keys. . . . . . . . . . , . . . . . . . . . . . , . . . . . . . . . 12 . . . . . . . . . . . . . . . . . . . . . - - ` , ` ` , ` ` , , ` ` , , , , , ` , , , ` ` , , , ` , - ` - ` , , ` , , ` , ` , , ` - - - I USA STANDARD Keys and Keyseats , - ASME BL7.L 67 m 0757670 0042533 b m 1. INTRODUCTION This standard establishes a uniform relation- ship between shaft s i ze and key s i ze for parallel and taper keys retaining similar basic sizing a s found in the withdrawn B17.1-1943 standard. This standard covers the size, type and toler- ances of parallel and taper keys and keyseats, and their relationship to shaft diameters and bore diameters. The s izes and tolerances contained in this standard are intended for single key appli- cations only. Key strength and steel analysis entering into the makeup of stock for keys is not within the scope of this standard. Shaft diameters are l isted for identification of various key s i zes and are not intended to establish shaft dimensions, tolerances or selections, This standard recognizes that there are two c l a s ses of stock for parallel keys presently used by industry. One is a broad negative toleranced bar stockand the other is a close plus toleranced keystock. Each is combined with appropriate key- s e a t tolerances to establish assemblies, respec- tively, designated a s Classes 1 and 2. Taper keys are established for C las s -2 as- sembly only. 2. DEFINITIONS 2.1 Key - A demountable machinery part which, when assembled into keyseats, provides a posi- tive means for transmitting torque between the shaft and hub. Tolerances are shown in Table 2. 2 . 1 . 1 Bar Stock - General purpose, negative toi- eranced, cold finished steel stock for parallel keys. 2.2.2 Keystock - A close plus toleranced, cold finished steel stock for parallel keys. 2.2. Keyseat - An axially located rectangular groove in a sha€t or hub. This may also be written a s shaft keyseat or hub keyseat when describing the exact application. Hub keyseat has been sometimes referred to a s a keyway. 2.3 Keyseating - The operation of producing key- seats. 3. KEY SIZE VERSUS SHAFT DIAMETER For a stepped shaft, the size of a key is de- termined by the diameter of the shaft a t the point of location of the key, regardless of the number of different diameters on the shaft. Square keys are preferred through 6x-inch diameter shafts and rectangular keys for larger shafts. Sizes and dimensions in unshaded area are preferred. If special considerations dictate the use of a keyseat in the hub shallower- than the preferred nominal depth shown in Table 1, it is recom- mended that the tabulated preferred nominal standard keyseat be used in the shaf t in all cases. --`,``,``,,``,,,,,`,,,``,,,`,-`-`,,`,,`,`,,`--- USA STANDARD Table 1 Key Size Versus Shaft Diameter NOMINAL SHAFT DIAMETER I NOMINAL KEY SIZE I NOMINAL KEYSEAT DEPTH *Some key standards show 1-1/4 in. Preferred s ize is l - l / Z in. Shaded areas: See Part 3, page 1. Ali dimensions given in inches. 2 KEYS AND KEYSEATS 4. KEY DIMENSIONS AND TOLERANCES HUB LENGTH i GIB HEAD TAPER PARALLEL I P L A I N TAPER I ALTERNATE PLAIN TAPER Plain and Gib Head Taper Keys Have a 1/8" Taper in 12" Table 2 Key Dimensions and Tolerances Parallel Taper NOMINAL KEY SIZE K E Y Wid Over - 1-1/2 Bar Stock Square 2-1/2 Keys tock 1-174 3 1-1/2 3 Rectangular 4 6 i74 Bar Stock - Keystock I 3 1-1/4 I 1-;4 Plain or Gib Head Square or Rectangular 3 *For locating position of dimension H . Tolerance does not apply, See Table 2A for dimensions on gib heads. A l l dimensions given in inches. t w To (incl) 3/4 1-1/2 2-1/2 3-1/2 1-1/4 Z 5 4 2 3/z - --- 1-1/2 3 4 6 7 i-1/4 3 7 1-1 /4 3 7 TOLERANCE Height, H 1 Width, W I _ - tO.000 -0.002 tO.000 . -0.002 tO.000 -0.003 tO.000 -0.003 M.000 -0.004 tO.000 -0.004 +O.OOO -0.006 1 +O.OOO -0.006 tO.001 -0.000 tO.002 -0.000 M.003 -0.000 +O.OOO -0.003 tO.000 -0.004 tO.000 -0.005 tO.000 -0.006 +O.OOO -0.008 +O.OOO -0.013 M.001 -0.000 M.002 -0.000 tO.003 -0,000 tO.001 -0.OOD +0.002 -0.000 tO.003 -0.000 M.000 .-0.003 tO.000 -0.004 tO.000 -0.005 +o.ooo -0.006 tO.000 -0.008 +O.OOO -0.013 tO.005 -0.005 +0.005 -0.005 +0.005 -0.005 --`,``,``,,``,,,,,`,,,``,,,`,-`-`,,`,,`,`,,`--- 1 ASME B17.L 67 0759670 0 0 4 2 5 3 4 L = USA STANDARD Nominal Key Size Width. W 5/i 6 3 /8 1/2 5 /8 3 / 4 7/8 1-1/4 1-1/2 1 1-3 / 4 2-1 / 2 2 3 3-1/2 *For local Table 2A Gib Head Nominal Dimensions H 1 / 8 3/16 1 / 4 5/16 3/8 1 / 2 5/8 3 / 4 7/8 ì g posit. ì-1/2 SQUARI A 1 / 4 5/16 7/16 1 1-3 /8 1-1/4 1-5/8 2 2-3/8 2-3/4 3 -1 /2 4 5 6 B 1 / 4 5/16 3 /8 7/16 1 / 2 5/8 3 /4 7/8 1 1-1/8 1-7/16 1-3/4 2 2-1 / 4 3 4 3-1/2 n of dimension H. REI H 3/32 1 / 8 3/16 1 / 4 1 / 4 3 /8 7/16 1 / 2 5 /8 314 7/8 L-1/2 1-1/2 i -3 / 4 !-1/2 1 ? ïANGU A 3/16 1 / 4 5/16 7/16 7/16 5 /8 3 / 4 7/8 1 1-1/4 1-3/8 1-5/8 2-3/8 2-3/4 4 2-3/8 3-1/2 iR B 3/8 3 /8 1 / 2 7/16 5/8 3 /4 7/8 . -3 / 4 . -3 / 4 . -1 /8 ! i-1/4 For larger s i z e s the following relationships are suggested a s guides for establishing A and B. A = 1.8H B = 1.2 H All dimensions given in inches. 4 --`,``,``,,``,,,,,`,,,``,,,`,-`-`,,`,,`,`,,`--- 4 - ASME BL7.L 67 0757670 OOLt2535 3 CHORDAL HEIGHT KEYS AND KEYSEATS 5. DEPTH CONTROL FORMULAS The chordal height Y is determined from the following formula: D - dD2 - A V 2 2 Y = The distance from the bottom of the shaft keyseat to the opposite side of the shaft is specified by dimension S. The following formula may be used for calculating this dimension: H D - H + d m 2 S = D - Y - - = - 2 Tabulated values of S for specific .shaft diameters are given in Table 3. The distance from the bottom of the hub key- seat to the opposite s ide o f the hub bore is specified by dimension T. For taper keyseats, T is measured a t the deeper end. The following for- mula may be used for calculating this dimension: DEPTH OF SHAFT KEYSEAT H 2 2 - D + H + d D 2 - IV2 + T = D - Y + - + C = I Tabulated values of T for parallel and taper key- seats for specific bores are given in Table 3. Symbols C = Allowance -k 0.005 inch clearance for parallel keys - 0.020 inch interference for taper keys DEPTH OF HUB KEYSEAT D = Nominal shaft or bore diameter, inches H = Nominal key height, inches W = Nominal key width, inches Y = Chordal height, inches - W + Y H/2 5 * - - ` , ` ` , ` ` , , ` ` , , , , , ` , , , ` ` , , , ` , - ` - ` , , ` , , ` , ` , , ` - - - ASME BL7.L b7 W 0757670 0042536 5 1/2 9/16 5[8 11/16 3/4 13/16 7/8 15/16 1 1-1/16 1-1/8 1-3/16 1-1/4 1-5/16 1-3/8 1-7/16 1-1/2 1-9/16 1-5/8 1-11/16 0.430 0.493 0.517 0.581 0.644 0.708 0.771 0.796 0.859 0.923 0.986 1 .O49 1.112 1.137 1.201 1.225 1.289 1.352 1.416 1.479 1-3/4 1-13/16 1-7/8 1-15/16 2 1 ,>42 1.527 1.591 1.655 1.718 2-11/16 2-3/4 2-13/16 2-7/8 2-15/16 2.338 2.402 2.387 2.450 2.514 3 3-1/16 3-1/8 2.577 2.641 2.704 USA STANDARD DEPTHCONTROLVALUES Tablc 3 Values for 5 and T Taper Nominal Shaft Diameter Parallel and Taper Square .E Rectangular Rectangular T Square ' T Rectangular T Square T S 0.560 0.623 0.709 0.773 0.837 0.544 0.607 0.678 0.742 0.806 0.535 0.598 0.684 0.748 0.812 0.519 0.582 0.653 0.717 0.781 0.445 0.509 0.548 0.612 0.676 0.739 0.802 0.827 0.890 0.954 0.900 0.964 1.051 1.114 1.178 0.869 0.932 1.019 1.083 1.146 0.875 0.939 1.026 1 .O89 1.153 0.844 0.907 0.994 1.058 1.121 1.017 1.080 1.144 1.169 1.232 1.241 1.304 1.367 1.455 i ;5 i8 1.210 1.273 1.336 1 A24 1 A87 1.216 1.279 1.342 1.430 1 A93 1 .I 85 1.248 1.311 1.399 1.462 1.288 1.351 1.415 1.478 1.541 1.605 1.669 1.732 1.796 1.859 1.543 1.606 1.670 1.733 1.796 1.580 1.644 1.707 1.771 . 1.834 1.518 1.581 1.645 1.708 1.771 1.605 1.590 1.654 1.717 1.781 1 $22 2.032 2.0.96 2.160 2.223 1.860 1.970 2.034 2.097 2.161 1.897 2.007 2.071 2.135 2.198 1.835 1.945 2.009 2.072 2.136 2-1/16 2-1/8 2-3/16 2-1/4 2-5/16 1.782 1.845 1.909 1.972 1.957 2.021 2.084 2.148 2.21€ t 2.275 1.844 1.908 1.971 2.034 2.051 2.287 2.350 2.414 2.477 2.587 2.224 2.288 2.351 2.414 2.493 2.262 2.325 2.389 2.452 2.562 2.199 2.263 2.326 2.389 2.468 2.626 2.689 2.753 2.816 2.880 2.532 2.596 2.659 2.723 2.786 2-3/8 2-7/16 2-1/2 2-9/16 2-5/8 2.114 2.178 2.242 2.305 2.369 2.651 2.714 2.778 2.841 2.905 2.557 2.684 2.7'48 2.811 2.621 2.432 2.495 2.512 2.575 2.639 2.968 3.032 3.142 3.205 3.269 2.874 3.017 3.080 3.144 2.938 2.943 3.007 3.117 3.180 3.244 2.849 2.913 2.992 3.055 3.119 3.332 3.3.96 3.182 3.246 2.702 2.766 2.829 3.207 3.271 3.334 3.307 3.371 3.434 e- 3.459 ..--.---. * 3.309 r /------ tolerances. All dimensions given in inches. 6 * . - - ` , ` ` , ` ` , , ` ` , , , , , ` , , , ` ` , , , ` , - ` - ` , , ` , , ` , ` , , ` - - - !.I. Nominal Shaft Diameter 3-3/16 3-1/4 3-5/16 3-3/8 3-7/16 3-9/16 3-5/8 3-11/16 3-3/4 3-13/16 3-7/8 3-15/16 4 4-3/16 4-3/8 3-1/2 4-1/4 4-7/16 4-1/2 4-3 /4 4-7/8 4-15/16 5 5-3/16 5-1/4 5-7/16 5-1/2 5-3/4 5-15/16 6 6-1/4 6-1/2 6-3/4 7 7-1/4 7-1/2 7-3/4 8 9 10 11 - 12 13 14 15 S and T Values are Al l dimensions given *1-3/4 x L l / Z key. ~ _. - ASME B17-L 67 m 0759b70 0042537 7 m KEYS AND KEYSEATS Table 3 Values for S and T - (Continued) $v -c @!p @i$ Parallel and Taper Parallel Taper Square Rectangular Square Re c tang u1 ar Square Rectangular S S T T T T 2.768 2.893 3.523 3.398 3 A98 3.373 2.831 2.956 3.586 3.461 3.561 3.436 2.816 2.941 3.696 3.571 3.671 3.546 2.880 3.005 3.760 3.635 3.735 3.610 2.943 3.068 3.823 3.698 3.798 3.673 3.007 3.132 3.887 3.762 3.862 3.737 3.070 3.195 3.950 3.825 3.925 3.800 3.134 3.259 4.014 3.889 3.989 3.864 3.197 3.322 4.077 3.952 4.052 3.927 3.261 3.386 4.141 4.016 4.116 3.991 3.246 3.371 4.251 4.126 4.226 4.101 3.309 3.434 4.314 4.189 4.289 4.164 3.3 73 3.498 4.378 4.253 4.353 4.228 3.436 3.561 4.441 4.316 4.416 4.291 3.627 3-752 4.632 4.507 4.607 4.482 3.690 3.815 4.675 4.570 4.670 4.545 3.817 3.942 4.822 4.697 4.797 4.672 3.880 4.005 4.885 4.760 4.860 4.735 3.944 4.069 4.949 4.824 4.924 4.799 4.041 4.229 5.2 96 5.109 5.271 5.084 4.169 4.356 5.424 5.236 5.399 5.211 4.232 4.422 5.487 5.300 5.462 5.275 4.296 4.483 5.551 5.363 5.526 5.338 4.486 4.674 5.741 5.554 5.716 5.529 4.550 4.737 5.805 5.617 5.780 5.592 4.740 4.927 5.995 5.807 5.970 5.782 4.803 4.971 6.058 5.871 6.033 5.846 4.900 5.150 6.405 6.155 6.380 6.130 5.091 5.341 6.596 6.346 6.571 6-321 5.155 5.405 6.660 6.410 6.635. 6.385 5 A09 5.659 6.914 6.664 6.889 6.639 5.662 5.912 7.167 6.917 7.142 6.892 5.760 *5.885 7.515 *7.390 7.490 *7.365 6.014 *6.139 7.769 *7.644 7.744 *7.619 6.268 *6.393 8.023 *7.898 7.998 *7.873 6.521 *6.646 8.276 *&I51 8.251 *8.126 6.619 6.869 8.624 8.374 8.599 8.349 6.873 7.123 8.878 8.628 8.853 8.603 7.887 8.137 9.892 9.642 9.867 9.617 8.591 8.966 11.096 10.721 11.071 10.696 9.606 9.981 12.111 11.736 12.086 11.711 10.309 10.807 13.314 12.814 13.289 12.789 11.325 11.825 14.330 13.830 14.305 13.805 12.028 12.528 15.533 15.033 15.508 15.008 13.043 13.543 16.548 16.048 16.523 16.023 calculated from formulas on page 5 . See Tables 4 and 5 for tolerances. in inches, 7 ~ -~ - - - ~ ~ ~ --`,``,``,,``,,,,,`,,,``,,,`,-`-`,,`,,`,`,,`--- I Depth Tolerance Shaft . Hub Key I Keyseat I Keyseat ASME BL7.L 67 m 0759670 0092538 9 m ' Fit Range* USA STANDARD - u 2 6 , KEY-KEYSEAT ASSEMBLIES +o.ooo +o.002 0.004 CL 3/4 +o.ooo +0.003 0.005 CL i/2 -0.002 -0.000 0.000 -0.002 -0,000 0.000 6'1 Class 1 - A clearance or metal to metal side fi t obtained by using bar stock keys and keyseat tolerances a s shown in Table 4-a relatively free fit. This fit applies only to parallel keys. 6.2 Class 2 - A side fit (possible interference or clearance) obtained by using keystock and key- seat tolerances a s shown in Table 5-a relatively tight fit. 6.3 Class 3 - A third type of fit not tabulated is an interference side fit. Since the degree of inter- ference is not readily standardized for th