1、 AN AMERICAN NATIONAL STANDARD REAMERS ASME B94.2-I995 (REVISION OF ANSI 694.2-1983) The American Society of Mechanical Engineers 345 East 47 th Street, New York, N.Y. Date of Issuance: July 31, 1995 This Standard will be revised when the Society approves the issuance of a new edition. There will be
2、 no addenda or written interpretations of the requirements of this Standard issued to this edition. ASME is the registered trademark of the American Society of Mechanical Engineers. This code or standard was developed under procedures accredited as meeting the criteria for American National Standard
3、s. The Consensus Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment which provides an opportunity for additi
4、onal public input from industry, academia, regulatory agen- cies, and the public-at-large. ASME does not “approve,“ “rate,“ or “endorse“ any item, construction, proprietary device, or activity. ASME does not take any position with respect to the validity of any patent rights asserted in connection w
5、ith any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such
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7、ty for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual volun- teers. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior writ
8、ten permission of the publisher. Copyright 0 1995 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in USA. FOREWORD This Standard for reamers was formulated by Technical Committee 20 of the B5 Sectional Committee on the Standardization of Small Tools and Machine Tool Eleme
9、nts. The organization of Technical Committee 20 on the Standardization of Reamers in March 1937 was prompted by a recognized need for unifying the practice in this field. The proposal submitted by the committee was approved by ASA and designated ASA B5.14-1941. The Standard ASA B5.14-1941 was revise
10、d and approved in 1949, and sub- sequently reaffirmed in 1954. A sufficient number of requests for revision resulted in reactivation of the committee in 1957. The revision was approved by the sectional com- mittee and the sponsors, and the required ASA approval and designation were granted April 9,
11、1959. In November 1961, the ASA Mechanical Standards Board approved the request of the B5 Sectional Committee sponsors that a separate project be initiated under ASA Procedure on the subject of Cutting Tools. As a result of this action, a new project was initiated on Cutting Tools, and ASME accepted
12、 sponsorship. The committee was designated B94 Cutting Tools, and the activity on cutting tools was removed from the B5 Sectional Committee. The designation numbers of the technical committees were changed to con- form with the new sectional committee organization. B5 Technical Committee 20 was chan
13、ged to B94 Technical Committee 9. Requests for revision to B5.14-1959 to cover additions, deletions, and clarification of the Standard necessitated reactivation of the committee. The revised draft was prepared and distributed to the members for review and comment. A meeting of TC-9 was held in Novem
14、ber 1962, and the draft was subsequently approved by the committee. The revised Standard was submitted to Sectional Committee B94 on May 27, 1964. Following approval by the Sectional Committee and the sponsor, the Standard was ap- proved by ASA on December 21, 1964 and designated as ASA B94.2-1964.
15、In 1970, Technical Committee 9 revised the 1964 issue of B94.2, incorporating revisions and additions reflecting current industry practice. The revision was presented to American National Standards Committee B94 and to the B94 secretariat for approval. Thereafter, the revision was approved by ANSI o
16、n September 28, 1971. In accordance with ANSI procedures, a further revision was undertaken in 1976 in order to update the Standard. This revision was approved by ANSI on May 4, 1977. Since then, ANSI also approved a 1983 revision, on September 30 of that year, as well as the present one, on April 1
17、4, 1995. 111 . ASME STANDARDS COMMllTEE B94 Standardization of Cutting Tools, Holders, Drivers, and Bushings (The following is the roster of the Committee at the time of approval of this Standard.) OFFICERS C. W. Preuss, Chair K. 1. Baron, Secretary COMMITTEE PERSONNEL K. 1. Baron, ASME, New York, N
18、ew York A. M. Bratkovich, Association for Manufacturing Technology, McLean, Virginia M. E. Merchant, Institute of Advanced Manufacturing Science, Cincinnati, Ohio C. W. Preuss, Kingsford Broach and Tool, Inc., Westlake, Ohio PERSONNEL OF TECHNICAL COMMITTEE 9 - REAMERS P. Bourg, Tivoly, Inc., Derby
19、Line, Vermont P. Field, Michigan Drill Corp., Miami, Florida M. N. Jarvis 11, Jarvis Cutting Tools, Inc., Rochester, New Hampshire R. E. Moring, Greenfield Industries, Augusta, Georgia C. W. Preuss, Kingsford Broach and Tool, Inc., Westlake, Ohio V CONTENTS Foreword . Standards Committee Roster 1 Sc
20、ope 2 Nomenclature and Definitions 3 Classifications Based on Construction 4 Classifications Based on Method of Holding or Driving . 5 Direction of Rotation and Helix Figure 1 Illustrations of Terms Applying to Reamers . Tables 1 Expansion Hand Reamers With Straight Flutes and Squared Shank . Carbon
21、 Steel Tolerances for Table 1 Squared Shank . Carbon Steel . Tolerances for Table 2 High-speed Steel . Tolerances for Table 3 High-speed Steel . Tolerances for Table 4 5 Taper Shank Jobbers Reamers With Straight Flutes - High-speed Steel . Tolerances for Table 5 6 Driving Slots and Lugs for Shell Re
22、amers and Shell Reamer Arbors . 7 Shell Reamers With Straight Flutes - High-speed Steel . Tolerances for Table 7 Tolerances for Table 8 9 Arbors With Straight Shanks for Shell Reamers . Tolerances for Table 9 10 Arbors With Taper Shanks for Shell Reamers Tolerances for Table 10 . 11 Expansion Chucki
23、ng Reamers With Straight Flutes and Straight Shank - 2 Expansion Hand Reamers With Left-Hand Helical Flutes and 3 Hand Reamers With Straight Flutes and Squared Shank . 4 Hand Reamers With Left-Hand Helical Flutes and Squared Shank - 8 Shell Reamers With Left-Hand Helical Flutes - High-speed Steel .
24、High-speed Steel . Tolerances for Table 11 . vii . 111 V 1 1 3 3 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 21 22 22 23 24 12 Expansion Chucking Reamers With Straight Flutes and Taper Shank . High-speed Steel . Tolerances for Table 12 . High-speed Steel, Fractional Sizes Tolerances for Table 13
25、 . High-speed Steel, Wire Gage Sizes . Tolerances for Table 14 . High-speed Steel. Letter Sizes Tolerances for Table 15 . High-speed Steel. Decimal Sizes., . Tolerances for Table 16 . Tolerances for Table 17 . 13 Straight Shank Chucking Reamers With Straight Flutes . 14 Straight Shank Chucking Reame
26、rs With Straight Flutes - 15 Straight Shank Chucking Reamers With Straight Flutes - 16 Straight Shank Chucking Reamers With Straight Flutes - 17 Taper Shank Chucking Reamers With Straight Flutes - High-speed Steel . 18 Straight Shank Chucking Reamers With Helical Flutes - Right- or Left-Hand Helix -
27、 Right-Hand Cut - High-speed Steel . Tolerances for Table 18 . Right-Hand Helix - Right-Hand Cut - High-speed Steel Tolerances for Table 19 . High-speed Steel . Tolerances for Table 20 . Tolerances for Table 21 . Squared Shank - High-speed Steel Tolerances for Table 22 . 23 Morse Taper Reamers With
28、Morse Taper Shank . Tolerances for Table 23 . 24 Taper Pin Reamers With Straight Flutes and Squared Shank - Carbon Steel. High-speed Steel Taper Pin Reamers With Left-Hand Spiral Flutes and Squared Shank - High-speed Steel Tolerances for Table 24 . Tolerances for Table 25 . Tolerances for Table 26 .
29、 Tolerances for Table 27 . 28 Taper Shank Bridge Reamers With Helical Flutes - High-speed Steel Tolerances for Table 28 . 29 Taper Shank Car Reamers With Straight Flutes - High-speed Steel Tolerances for Table 29 . 30 Taper Shank Car Reamers With Helical Flutes - High-speed Steel . Tolerances for Ta
30、ble 30 . 31 Taper Shank Structural Reamers With Three Helical Flutes - High-speed Steel . Tolerances for Table 31 . 19 Taper Shank Chucking Reamers With Helical Flutes - 20 Straight Shank Rose Chucking Reamers With Straight Flutes - 21 Stub Screw Machine Reamers With Helical Flutes - High-speed Stee
31、l . 22 Morse Taper Finishing Reamers With Straight Flutes and 25 Taper Pin Reamers With High-Spiral Flutes - High-speed Steel . 26 Die Makers Reamers With High-Spiral Flutes - High-speed Steel 27 Taper Shank Bridge Reamers With Straight Flutes - High-speed Steel . . Vlll 25 26 27 28 29 30 31 32 33 3
32、3 34 35 36 37 38 39 40 40 41 42 43 43 44 44 45 45 46 47 47 48 48 49 49 50 51 52 52 53 53 54 54 32 Straight Shank Center Reamers (Short Countersinks) . High-speed Steel . 55 Tolerances for Table 32 . 55 33 Straight Shank Machine Countersinks . High-speed Steel . 56 Tolerances for Table 33 . 56 34 Tap
33、er Pipe Reamers With Spiral Flutes and Squared Shank . High-speed Steel . 57 Tolerances for Table 34 . 58 Appendix A Conversion Tables From Inch to Millimeter 59 ix ASME B94.2-1995 REAMERS 1 SCOPE This Standard covers the American National Stand- ard for Reamers - nomenclature, definitions, types, s
34、izes, and tolerances. 2 NOMENCLATURE AND DEFINITIONS reamer - a rotary cutting tool with one or more cutting elements used for enlarging to size and contour a previously formed hole. Its principal support during the cutting action is obtained from the workpiece. (See Fig. 1.) actual size - the actua
35、l measured diameter of a reamer, usually slightly larger than the nominal size to allow for wear angle of taper - the included angle of taper on a taper tool or taper shank arbor hole - the central mounting hole in a shell reamer axis - the imaginary straight line which forms the longitudinal center
36、line of a reamer, usually estab- lished by rotating the reamer between centers back taper - a slight decrease in diameter, from front to back, in the flute length of reamers bevel - an unrelieved angular surface of revolution (not to be confused with.chamfer) body - the fluted full diameter portion
37、of a reamer, inclusive of the chamfer, starting taper, and bevel chamfer - the angular cutting portion at the entering end of a reamer see also secondary (chamfer) chamfer angle - the angle between the axis and the cutting edge of the chamfer measured in an axial plane at the cutting edge chamfer le
38、ngth - the length of the chamfer measured parallel to the axis at the cutting edge chamfer relief angle - see under relief chamfer relief - see under relief chip breakers - notches or grooves in the cutting edges of some taper reamers designed to break the continuity of the chips circular land - see
39、 preferred term margin clearance - the space created by the relief behind the cutting edge or margin of a reamer core - the central portion of a reamer below the flutes which joins the lands core diameter - the diameter at a given point along the axis of the largest circle which does not project int
40、o the flutes cutter sweep - the section removed by the milling cutter or grinding wheel in entering or leaving a flute cutting edge - the leading edge of the relieved land in the direction of rotation for cutting cutting face - the leading side of the relieved land in the direction of rotation for c
41、utting on which the chip impinges external center - the pointed end of a reamer. The included angle varies with manufacturing practice. flutes - longitudinal channels formed in the body of the reamer to provide cutting edges, permit passage of chips, and allow cutting fluid to reach the cutting edge
42、s angular flute - a flute which forms a cutting face lying in a plane intersecting the reamer axis at an angle. It is unlike a helical flute in that it forms a cutting face which lies in a single plane. helical flute - (sometimes called spiral flute) a flute which is formed in a helical path around
43、the axis of a reamer spiralflute (1) on a taper reamer, a flute of constant (2) in reference to a straight reamer, see lead; or, preferred term helical flute. straight flute - a flute which forms a cutting edge lying in an axial plane flute length - the length of the flutes not including the cutter
44、sweep guide - a cylindrical portion following the flutes of a reamer to maintain alignment heel - the trailing edge of the land in the direction of rotation for cutting 1 ASME 694.2-1995 REAMERS helix angle - the angle which a helical cutting edge at a given point makes with an axial plane through t
45、he same point hook - a concave condition of a cutting face. The rake of a hooked cutting face must be determined at a given point. internal center - a 60 deg countersink with clearance at the bottom, in one or both ends of a tool, which establishes the tool axis irregular spacing - a deliberate vari
46、ation from uni- form spacing of the reamer cutting edges land - the section of the reamer between adjacent flutes land width - the distance between the leading edge of the land and the heel measured at a right angle to the leading edge lead of flute - the axial advance of a helical or spiral cutting
47、 edge in one turn around the reamer axis length - the dimension of any reamer element meas- ured parallel to the reamer axis limits - the maximum and minimum values desig- nated for a specific element margin - the unrelieved part of the periphery of the land adjacent to the cutting edge margin width
48、 - the distance between the cutting edge and the primary relief measured at a right angle to the cutting edge neck - the section of reduced diameter connecting shank to body, or connecting other portions of the reamer nominal size - the designated basic size of a reamer overall length - the extreme
49、length of the complete reamer from end to end, but not including external centers or expansion screws periphery - the outside circumference of a reamer pilot - a cylindrical portion preceding the entering end of the reamer body to maintain alignment rake - the angular. relationship between the cutting face, or a tangent to the cutting face at a given point and a given reference plane or line axial rake - applies to angular (not helical or spiral) cutting faces. It is the angle between a plane con- taining the cut
