1、AMERICAN NATIONAL STANDARD Spade Drill Blades and Spade Drill Holders ANSI B94.49 - 1975 REAFFIRMED 1995 FOR CURRENT COMMIlTEE PERSONNEL PLEASE SEE ASME MANUAL AS-1 1 SECRE TARIA T THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS PUBLISHED BY THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS United Engineeri
2、ng 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. THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Copyright 0 1976 by All Rights Reserved Pr
3、inted in USA. FOREWORD Flat type drills have been used to produce holes since the dawn of recorded history. In recent times a flat drill commonly called a spade drill, has been used for producing larger size holes. Generally above 26mm diameter. The type of spade drill presently in use was first int
4、roduced commercially in 1945 and was called a “Z” type. In 1947 a three hole blade, called “X” type, and a single bolt hole, called “Y” type, spade drills were introduced. During 1948 a second concern introduced a two bolt hole design along with a single bolt hole design that was not completely comp
5、atible with the other single hole blade. This situation did not create a problem as long as there were very few producers of spade drills. During the next two decades the use of spade drills increased along with the number of suppliers. A Depart- ment of Commerece report in 1965 stated that there we
6、re 42 suppliers of spade drills. There was much confusion among users regarding interchangeability between the different types and between the same types of spade drill blades and holders from the various suppliers. Technical Committee 18 was established during the 1970 Annual Meeting of the America
7、n National Standards Institute Committee B94 to develop an American Standard for Spade Drill Blades and Spade Drill Holders. The first meeting of TC-18 was held in April 197 1. Because the two hole, three hole, “Z”, and other types of spade drills were not universally used it was decided that only t
8、he single bolt hole spade drill blade and holder would be considered for this standard. The draft of the completed standard for Spade Drill Blades and Spade Drill Holders was submitted to the Secretariat, The American Society of Mechanical Engineers, for review in June 1974. This document was adopte
9、d as an American National Standard on September 10, 1975. iii AMERICAN NATIONAL STA,NDARDS COMMITTEE 894 Standardization of Cutting Tools, Holders, Drivers and Bushings OFFICERS Harry McLinden, Chairman A.H. Mezey, Vice-chairman Kurt Wessely, Secretary AMERICAN GEAR MANUFACTURERS ASSOCIATION, THE P.
10、M. Dean, Jr., Mechanical Technology, Inc., Latham, New York G. L. Scott, Alternate, American Gear Mfrs. Assn., Washington, D.C. AMERICAN SOCIETY OF MECHANICAL ENGINEERS, THE M.E. Merchant, Cincinnati Milacron, Inc., Cincinnati, Ohio G.M. Monocelli, General Electric Co., Detroit, Michigan C.J. Oxford
11、, Jr., National Twist Drill , Kearney, New Jersey U.S. DEPARTMENT OF THE AIR FORCE To be appointed U.S. DEPARTMENT OF THE ARMY D.L. York, Liaison, General Thomas J. Rodman Laboratory, Rock Island, Illinois U.S. DEPARTMENT OF THE NAVY J.N. Cornette, Liaison, Naval Ship Systems Command, Washington, D.
12、C. V US. MACHINE SCREW BUREAU Herman Muenchinger, Continental Screw Co New Bedford, Massachusetts D.E. Chase, Alternate, Continental Screw Co., New Bedford, Massachusetts INDIVIDUAL COMPANIES Harold Cooper, Chrysler Corp., Detroit, Michigan William Hofbauer. Mohawk Tools, Inc., Montpelier. Ohio Kenn
13、eth Hull, The Ingersoll Milling Machine Co., Rockford, Illinois A.M. Mezey, Richards Brothers Punch Co., Detroit, Michigan TECHNICAL COMMITTEE 18 - SPADE DRILLS G.F. Wilson, Chairman, Consultant, Wheeling, Illinois Warren Gill, Secretary, Muskegon Tool Industries, Inc., Muskegon, Michigan D.J. Bohac
14、, Madison Industries, Providence, Rhode Island P.5. Erickson, Deere Schiller, Waukesha Cutting Tools Inc., Waukesha, Wisconsin A. Totarelia. Etickson Tool Co., Solon, Ohio vi CONTENTS Page 1 . Scope 1 2 . Spade Drill Blade-Nomenclature and Definitions . 1 3 . Spade Drill Blade-Dimensional Tolerances
15、 . 6 4 . Spade Drill Holder-Nomenclature and Definition . 8 5 . Spade Drill Holder-Dimensional Tolerances 12 FIGURES 1 . Spade Drill Blade Nomenclature 3 2 . Spade Drill Holder Nomenclature . 9 TABLES 1 . Spade Drill Blades-Type I 4 2 . Spade Drill Blades-Type I1 . 5 3 . Spade Drill Holder-Type I 10
16、 4 . Spade Drill Holder-Type I1 . 11 APPENDIX A . Conversion Tables from Inch to Millimeter . 13 B . Explanation of Spade Drill Components . 17 vii ANSI 694.49-1975 AMERICAN NATIONAL STANDARD SPADE DRILL BLADES AND SPADE DRILL HOLDERS 1. SCOPE This standard covers nomenclature, definitions, sizes an
17、d tolerances for spade drill blades and spade drill holders insofar as the holder locates and holds the spade drill blade. All dimensions are in inches. Conversion tables from inch to millimetre are given in Appendix A. 2. SPADE DRILL BLADE-NOMENCLATURE AND DEFINITION 2.1 Spade Drill Blade A flat en
18、d cutting tool, having two cutting faces used for producing, enlarging, or finishing holes. The blade is located in and driven by a suitable tool holder. 2.2 Axis The imaginary straight line which forms the longi- tudinal centerline of the blade. 2.3 Back Taper A slight decrease in cutting diameter
19、(or width) from the outer corners of the cutting lips to the back of the blade measured as an angle or reduction in blade diameter. 2.4 Blade Diameter The width of the blade measured across the circular od (outside diameter) land (margins) at the point. 2.5 Blade Length The axial length of the blade
20、 measured from the chisel edge to the locating surface or seating pads on the back of the blade. 2.6 Blade Thickness Thickness of tthe blade. 2.7 Chip Splitters Notches or grooves produced on the front lip clear- ance surface (sometimes called chip breaker grooves) for splitting the chip into segmen
21、ts for easier removal from the workpiece. Usually staggered in location from one lip to the other. 2.8 Chisel Edge The edge at the tip of the spade drill blade that is formed by the intersection of the two lip clearance surfaces. 2.9 Chisel Edge Angle The angle included between the chisel edge and t
22、he cutting lip as viewed from the cutting end of the blade. 2.10 Cutting Edge Angle The angle formed by the cutting edge and the flat portion of the blade. 2.1 1 Cutting Lip The cutting edges extending from the chisel edge to the periphery. 2.12 Ear Length The length of the locating ears beyond the
23、seating pads. 2.13 Front Lip Clearance The clearance angle along the cutting edge of the blade. It is measured from a projected plane tangent to the lip. (See Figure 1) 1 AMERICAN NATIONAL STANDARD SPADE DRILL BLADES AND SPADE DRILL HOLDERS 2.14 Locating Ears The projections on the back of the spade
24、 drill blade beyond the seating pads which locate and center the blade in the holder. 2.15 Locating Slot The space between the locating ears that centralizes the blade in the holder, 2.16 Margin Same as od land 2.17 OD Clearance The peripheral portion of the spade drill blade which has been cut away
25、 so it will not rub against the walls of the hole. 2.18 OD Land The peripheral portion of the blade which is not cut away to provide clearance. This may also be re- ferred to as the margin. 2.19 Point The cutting end of the blade. 2.20 Point Angle The angle included between the two cutting edges pro
26、jected on the plane of the surface of the blade. 2.21 Rake Surface That portion or surface cut into the spade drill blade to provide a rake angle and give curl to the chips produced. (Sometimes called a flute or gullet.) ANSI 894.49-1975 2.22 Retaining Screw Hole The hole in the body of the blade fo
27、r the purpose of retaining the blade in the holder. 2.23 Retaining Screw Hole Location Axial distance between the center of the retaining hole and seating pad surface. 2.24 Seating Pad Surface(s) at the back of the blade which axially position and seat the blade in the holder. 2.25 Seating Pad Relie
28、f The relieved portion between the seating pads. (optional) 2.26 Web The central portion at the point of the blade which separates the two cutting lips. 2.27 Web Thickness The thickness of the web, at the point, measured normal to the blade axis. 2.28 Web Thinning The operation of reducing the web t
29、hickness at the point to reduce the thrust force. 2.29 Wedge Angle (optional) An angular reduction of the blade thickness at the point (See Figure 1) 2 AMERICAN NATIONAL STANDARD SPADE DRILL BLADES AND SPADE DRILL HOLDERS ANSI 894.49-1975 OD LAND CHISEL EDGE OD CLEARANCE SHAPE OPTIONA CUTTING EDGE A
30、NGLE BLADE LENGTH - EAR LENGTH SPLITTERS RAKE SURFACE (CUTTING LIP) FRONT LIP CLEARANCE LOCATING EARS WEDGE ANGLE (OPTIONAL) FIG. 1 SPADE DRILL BLADE NOMENCLATURE 3 VE3 Table 1 Spade Drill Blades-Type I Blade Blade Diameter Decimal Series Range Equivalent A B C D E F G A 1“to 11/4“ 1.000 - 1.250 0.2
31、8* 0.75* 0.187* 0.25 1.15 0.09 130“ B 1“/64 “ to 1 /z “ 1.265 - 1.500 0.28 1.06 0.281 0.31 1.40 0.09 130“ C 133/ to 2“ 1.515 - 2.000 0.43 1.25 0.312 0.31 2.00 0.12 130“ D 21/64., to 21/21, 2.015 - 2.500 0.81* 1.75 0.375 0.43 2.37 0.1 2 130“ E 233/64#1 to 3“ 2.515 - 3.000 0.87* 2.06 0.437 0.56* 2.62
32、0.12 130“ 1: 3/64“ to 31, 3.015 - 3.500 1 .oo* 2.62 0.500 0.68* 3.12 0.1 2 130“ G 33311, to 4“ 3.515 - 4.000 1.12* 3.06 0.625 0.81* 3.37 0.1 2 130“ H 4164 to 6“ 4.015 - 6.000 1.25* 3.50 0.687 0.81 * 3.68 0.1 8 130“ *Indicates variations between type I and type I1 blades. 0 n r r I 0 I- O rn n D z m
33、(0 0 (0 b Table 2 Spade Drill Blades-Type II Blade Blade Diameter Decimal Series Range Equivalent A B C D E F G 1.000 - 1.250 1.265 - 1.500 1.515 - 2.000 2.015 - 2.500 2.515 - 3.000 3.015 - 3.500 3.515 - 4.000 4.015 - 6.000 0.25* 0.28 0.43 0.50* 0.62* 0.68* 0.75* 0.81* 0.81* 1.06 1.25 1.75 2.06 2.62
34、 3.06 3.50 0.250* 0.28 1 0.312 0.375 0.437 0.500 0.625 0.687 0.25 0.31 0.31 0.43 0.43* 0.50* 0.62* 0.75* 1.15 0.09 130“ 1.40 0.09 130“ 2.00 0.12 130“ 2.31 0.12 130“ 2.62 0.12 130“ 3.12 0.12 130“ 3.37 0.1 2 130“ 3.68 0.18 130“ *Indicates variations between type I and type I1 blades. rn 0 v) n D z E A
35、MERICAN NATIONAL STANDARD SPADE DRILL BLADES AND SPADE DRILL HOLDERS ANSI B94.49-1975 3. SPADE DRILL BLADE-DIMENSIONAL TOLERANCES Blade Cutting Diameter Tolerance A 1 to 1% Inclusive D 2/64 to 2% Inclusive Plus 0.0025 to Minus 0.0025 C 1“/64 to 2 Inclusive Plus 0.0020 to Minus 0.0020 B 117/ to 1 1/2
36、 Inclusive Plus 0.0020 to Minus 0.0020 Plus 0.0035 to Minus 0.0035 F 3 / to 3 /2 Inclusive Plus 0.0030 to Minus 0.0030 E 233/ to 3 Inclusive Plus 0.0030 to Minus 0.0030 G 3“/64 to 4 Inclusive H 4/64 to 6 Inclusive Plus 0.0035 to Minus 0.0035 Plus 0.0035 to Minus 0.0035 I Back Taper Tolerance 0.001 t
37、o 0.002 inch per inch per side Blade Length Series Size Tolerance A 1 to 1% Inclusive Plus 0.12 to Minus 0.12 H 4/ to6 Inclusive Plus 0.12 to Minus 0.12 G 333/64 to 4 Inclusive Plus 0.06 to Minus 0.06 F 3l/64 to 3l/2 Inclusive Plus 0.06 to Minus 0.06 E 233iW to 3 Inclusive Plus 0.06 to Minus 0.06 D
38、2 v64 to 2 /2 Inclusive Plus 0.06 to Minus 0.06 C 1 “/ A 1 .OOO - 1.250 0.28* 0.75* 0.187* 0.09 B 1.265 - 1.500 0.28 1.06 0.28 1 0.09 C 1.515 - 2.000 0.43 1.25 0.3 12 0.12 D 2.01 5 - 2.500 0.81 * 1.75 0.375 0.1 2 E 2.515 - 3.000 0.87* 2.06 0.437 0.12 1 3.015 - 3.500 1 .oo* 2.62 0.500 0.1 2 G 3.515 -
39、 4.000 1 .I 2* 3.06 0.625 0.1 2 H 4.015 - 6.000 1.25* 3.50 0.687 0.1 8 *Indicates variations between type I and type I1 holders. 10 AMERICAN NATIONAL STANDARD SPADE DRILL BLADES AND SPADE DRILL HOLDERS ANSI B94.49-1975 Table 4 Spade Drill Holder-Type I I Blade Blade Cutting Series Ranre A B C F 1.00
40、0 - 1.250 1.265 - 1.500 1.515 - 2.000 2.015 - 2.500 2.515 - 3.000 3.015 - 3.500 3.515 - 4.000 4.015 - 6.000 0.25* 0.28 0.43 0.50* 0.62* 0.68* 0.75* 0.81 * 0.81 * 1.06 1.25 1.75 2.06 2.62 3.06 3.50 0.250* 0.281 0.312 0.375 0.437 0.500 0.625 0.687 0.09 0.09 0.12 0.1 2 0.1 2 0.1 2 0.1 2 0.18 *Indicates
41、 variations between type I and type I1 holders. 11 AMERICAN NATIONAL STANDARD SPADE DRILL BLADES AND SPADE DRILL HOLDERS ANSI 694.49-1975 5. SPADE DRILL HOLDER-DIMENSIONAL TOLERANCES Screw Location Tolerance All series and sizes Plus 0.015 to minus 0.015 Distance Across Locating Flats Tolerance All
42、series and sizes Nominal to minus 0.001 Centrality Across Locating Flats Tolerance All series and sizes (Relative to Axis) 0.002 maximum variation Blade Slot Width Tolerance All series and sizes Plus 0.002 to minus 0.000 Centrality of Blade Slot (tiv) (Relative to Axis) All series and sizes Total In
43、dicator Variation 0.005 tiv Locating Fiat Length Tolerance All series and sizes Plus to suppliers specifications to minus 0.000 12 Appendix A CONVERSION TABLES FROM INCH TO MILLIMETER Any dimension in this standard can be converted of significant digits to be retained in the SI equiva- by the additi
44、on of its components from the tables in lents. (For an explanation of conversion techniques, this Appendix. see American National Standard Metric Practice values in customary units in determining the number Consider the actual or implied precision of the Guide, ANSI 22 10.1-1972) inch 1 2 3 4 5 6 7
45、8 9 10 11 12 mm 25.40 50.80 76.20 101.60 127.00 152.40 177.80 203.20 228.60 254.00 279.40 304.80 inch 1/64 1/32 3/64 1/16 5 164 3/32 7 164 1 /8 9/64 5/32 1 1/64 3/16 I 3/64 7/32 15 164 1 14 17/64 9/32 19/64 5/16 2 1/64 11/32 23/64 318 25/64 13/32 27/64 7/16 29/64 15/32 3 1/64 13 mm 0.40 0.79 1.19 1.
46、58 1.98 2.38 2.78 3.18 3.57 3.97 4.37 4.76 5.16 5.56 5.95 6.35 6.75 7.14 7.54 7.94 8.33 8.73 9.13 9.52 9.92 10.32 10.72 11.11 11.51 11.91 12.30 inch 112 3 3 164 17/32 35 164 9/16 3 7 764 19/32 39/64 5 /8 4 1/64 21/32 43/64 11 116 45 164 23/32 47/64 3 14 49/64 25/32 5 1 164 13/16 5 3 164 27/32 55 164
47、 718 57/64 29/32 59/64 15/16 61 164 31/32 63 164 mm 12.70 13.10 13.49 13.89 14.29 14.68 15.08 15.48 15.88 16.27 16.67 17.07 17.46 17.86 18.26 18.65 19.05 19.45 19.84 20.24 20.64 2 1.04 21.43 2 1.83 22.22 22.62 23.02 23.42 23.81 24.21 24.6 1 25.00 Inch to Millimeter (for decimal. inch values of less
48、than one inch) Do not interpolate Inch 0.00 0.0 1 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.1 1 0.1 2 0.13 0.14 0.15 0.16 0.1 7 0.18 0.19 0.20 0.21 0.22 0.23 0.24 0.25 0.26 0.27 0.28 0.29 0.30 0.31 0.32 0.33 0.34 0.35 0.36 0.37 0.38 o.xx0 0.00 0.25 0.5 1 0.76 1.02 1.27 1.52 1.78 2.03 2.29 2.54
49、2.79 3.05 3.30 3.56 3.81 4.06 4.32 4.57 4.83 5.08 5.33 5.59 5.84 6.10 6.35 6.60 6.86 7.1 1 7.37 7.62 7.87 8.1 3 8.38 8.64 8.89 9.14 9.40 9.65 0.xxl - 0.03 0.28 0.53 0.79 1.04 1.30 1.55 1.80 2.06 2.31 2.57 2.82 3.07 3.33 3.58 3.84 4.09 4.34 4.60 4.85 5.1 1 5.36 5.61 5.87 6.12 6.38 6.63 6.88 7.14 7.39 7.64 7.90 8.15 8.4 1 8.66 8.92 9.1 7 9.42 9.68 o.xx2 - 0.05 0.30 0.56 0.81 1.07 1.32 1.57 1.83 2.08 2.34 2.59 2.84 3.10 3.35 3.6 1 3.86 4.1 I 4.37 4.62 4.88 5.1 3 5.39 5.64 5.89 6.15 6.40 6.65 6.91 7.16 7.4 2 7.67 7.92 8.18 8.43 8.69 8.94 9.19 9.45 9.70 O.xx3 O.xx4
