1、USA STANDARD GEAR SHAPER ,CUTTERS USAS B94.21- 1968 3p0,0, The American Society of Mechanical Engineers THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS United Engineering Center 345 East 47th Street New York, N. Y. 1001 7 USA STANDARD This USA Standard is one of nearly 3000 standards approved as Americ
2、an Standards by the American Standards Association. On August 24, 1966, the ASA was reconstituted as the United States of America Standards Institute. Standards approved as American Standards are now designated USA Standards. There is no change in their index indentifi- cation or technical content.
3、Any part of this standard may be quoted. Credit lines should read: “Extracted from USA Standard Gear Shaper Cutters (USAS B94.21-1968) with the permission of the publisher, The American Society of Mechanical Engineers, United Engineering Center, 345 East 47th Street, New York, New York 10017.” THE A
4、MERICAN SOCIETY OF MECHANICAL ENGINEERS Copyright, 1969 by Printed in U.S.A. FOREWORD In response to requests from both users and producers a project was initiated in December of 1961 to establish standards for gear cutting tools. USA Standards Committee B5 approved this project at their annual meet
5、ing in 1961 and created technical committee TC-14 to prepare such standards. In 1962 the USA Standards Committee B5 was divided and technical commit- tees identified with the general area of “metal cutting” were transferred to a new USA Standards Committee B94. The first meeting of TC-14, reporting
6、to USA Standards Committee B94, was held in December 1962. It was at this time decided to divide the general subject into three areas; i.e., hobs, gear shaper cutters and shaving cutters. The initial activity was to prepare a proposal for a USA Standard on hobs, using the industry standards (MCTI) a
7、s the basis for consideration. A proposal covering hobs was submitted to industry in September 1964 and on June 22, 1966, it was approved by the USA Standards Institute and designated A proposal covering shaper cutters was submitted to industry in December 1966 for review and comments. All of the re
8、sponses were considered in a meeting of TC-14 in November 1967 and they then approved a final proposal. The B94 TC15 Editorial Committee reviewed the proposal and it was sub- mitted in March 1968 to the USA Standards committee B94 for letter ballot. Fol- lowing approval by B94, the proposal was appr
9、oved by the sponsor, ASME, on June 13, 1968. It was approved by the United States of America Standards Institute on August 5, 1968. B94.7-1966. . Ill USA STANDARDS COMMITTEE B94 STANDARDIZATION OF CUTTING TOOLS, HOLDERS DRIVERS AND BUSHINGS OFFICERS H. J. Moffatt, Chairman A. M. Mezey, Vice-Chairman
10、 USA STANDARDS COMMITTEE THE AMERICAN GEAR MANUFACTURERS ASSOCIATION P. M. Dean, Jr., Mechanical Technology, Inc., Latham, New York G. L. Scott, Alternate, American Gear Manufacturers Association, Washington, D.C. AMERICAN SOCIETY OF MECHANICAL ENGINEERS, THE C. J. Oxford, Jr., Vice President Resear
11、ch, National Twist Drill 6 inches and 8 inches 0.0010 tiv 7. Indicating band runout (when supplied), with respect to hole 0.0002 tiv. 10 GEAR SHAPER CUTTERS Keyway 1 For cutting involute herringbone gears of 7% up to 20 diametral pitch, having a helix angle not exceeding 30 degrees and a transverse
12、pressure angle of 19 degrees or more. Furnished in matched sets of two cutters, one right-hand and one left-hand. Table 9. Sizes and Dimensions of Ground, Disk Type, Finishing Gear Shaper Cutters For Herringbone Gears PD Hole C bore Keyway Nominal I Nominal I Minimum I Nominal - Nominal Web 700th Th
13、ickness Transverse W Length B Diametral Pitch L I I I1 4 thru 8 114 over 8 to 20 llL 46 11 2 thru 3 1% over 6 thru 16 1% 1% 4- 4 6 114 1% over 3 thru 6 15 1% thru 2% 1346 2 over 5 thru 12 14 6 2 over 2% thru 5 19L6 2. 4 All dimensions given in inches. 11 USA STANDARD L TAPER SHANK (SEE TABLE 11) Loc
14、ation of indicating band (when specified) 5OSharpening Angle Circular sharpening as shown above is standard for cutters coarser than 47 NDP with helix angles less than 9 degrees, and for cutters 47 NDP and finer with helix angles thru 15 degrees. Helical sharpening as shown above is standard far cut
15、ters coarser than 4 7 NDP wiph helix angles of 9 degrltes or more. Table 10. Sizes and Dimensions of Ground Finishing Taper Shank Gear Cutters For Cutting Spur and Helical Teeth Normal Diametral L Over I Thru (See Notes below) Nominal Tooth Pitch Diameter of Cutter Pitch Nominal Size Actual Range Le
16、ngth 6 up to 10 3/4 Optional 4% 4% 35 Web Thickness Normal Diametral w B Pitch 4 10 up to 17 I 1 34 17 up to 25 4 25 up to 41 4 2.5 up to 3 3 up to 4 4 6 1 34 2.5 & 3 AGMA Stub 4 6 1% 2 & 2.25 AGMA Stub 4 up to 5 46 1 34 % 3.5 AGMA Stub 5 up to 7 4 & 5 AGMA Stub 3L 1% 4/8, 5/7, 5/10, 6/8, 6/12 34 7
17、up to 10 1% 2.5/5, 3/6, 4/5 34 10 up to 17 1 3L 17 up to 25 1% 2 up to 2.5 : 4 6 AGMA Stub 2 8, 2.25 AGMA Stub 2.5 & 3 AGMA Stub 4 Iln tn 7 % 2.5/5, 3/4, 3/6, 4/5 1: 7 up to 10 % 4/8, 5/7, 5/10, 6/8, 6/12 1% % .- 3.5, 4 & 5 AGMA Stub 6 AGMA Stub - 10 up to 17 1% 17 up to 25 1% Nominal Tooth Length L
18、 4 I1 46 g46 46 4 4 L 11 , 46 I 1 1 1 I 13 All dimensions given in inches. 17 USA STANDARD Table 12. Sizes and Dimensions of Ground, Disk Type Finishing Gear Shaper Cutters (Cont.) PD Nominal 6% 7 I Hole Minimum Nominal C bore 1% t+ I 4% 4 4 All dimensions given in inches. Nominal Web Length B Pitch
19、 w Tooth Thickness Normal Diametral L % 2 up to 3 1.75. 2. 2.25 AGMA Stub 2 I 1% 2.5 & 3 AGMA Stub 3.5 AGMA Stub 2.5/5, 3/6, 4/8 1% 17 up to 20 1% % GEAR SHAPER CUTTERS I I Table 13. Sizes and Dimensions of Ground Disk Type Finishing Gear Shaper Cutters Having Helical Type Sharpening and Helix Angle
20、s of 9 degrees thru 35 degrees for cutting helical gears PD Nominal lj/4 15 1% 2 Hole Minimum Nominal C bore 51% 5 % 134 Nominal Web Tooth Thickness Normal Diametral W Length B Pitch L 34 6 17 up to 25 4 5L 25 up to 41 A6 % /4 17 up to 25 34 6 % A 10 up to 17 4 543 25 up to 41 34 6 46 % t/, 17 up to
21、 25 34 6 Q46 1 a UP to 10 4 5h 25 up to 41 34 6 4 6 3/, 10 up to 17 % 4 /4 34 54 25 up to 41 4 6 A6 % 17 Lp to 25 34 6 : A 10 up to 17 f/, gA 6 1 a up to 10 Alldimensions given in inches 19 (continued) USA STANDARD Table 13. Sizes and Dimensions of Ground Disk Type Finishing Gear Shaper Cutters PD N
22、ominal 2% 3 3: 4 4: 5 Having Helical Type Sharpening and Helix Angles of Sdegrees thru 35 degrees for cutting helical gears (continued) I I I I I All dimensions given in inches. (continued) 20 GEAR SHAPER CUTTERS Table 13. Sizes and Dimensions of Ground Disk Type Finishing Gear Shaper Cutters Having
23、 Helical Type Sharpening and Helix Angles of 9 degrees thru 35 degrees for cutting helical gears (continued) PD Nominal 6 6% 7 8t Hole C bore Web Nominal Minimum W Nominal Tooth Pitch Length 3 up to 4 7 u to 10 10 up to 17 All dimensions given in inches. t 8 inch P. D. cutters have unaligned 4, x 5/
24、32 keyway in the back face. 21 USA STANDARD tH0le 1 # L T, 5O C Bore I I I Sharpening Angle The circular sharpening shown is standard for a/ spur cutters and for all helical cutters which have helix angles less than 9 degrees, and for those of 9 thru 35 degrees helix angle which are: 7) Over 47 NDP
25、with pitch diameters thru 3% in. 2) Over 25 NDP with pitch diameters over 3% in. thru 5% in. 3) Over 77 NDP with pitch diameters over 5% in. Table 14. Sizes and Dimensions of Ground Deep Counterbore Type Finishing Gear Shaper Cutters (For Cutting Spur Gears and For Cutting Helical Gears Where the He
26、lical Cutters Have a Circular Type Sharpening) Nominal Web Normal Diametral Thickness Tooth W Pitch B Length L All dimens ions given in inches. GEAR SHAPER CUTTERS Table 14. Sizes and Dimensions of Ground Deep Counterbore Type Finishing Gear Shaper Cutters (For Cutting Spur Gears and For Cutting Hel
27、ical Gears Where the Helical Cutters Have a Circular Type Sharpening) (Cont.) PD Nominal 12 2 3 Nominal Hole Length B Pitch W Minimum Nominal Tooth Thickness Normal Diametral Web C bore L a UP to 10 2 gA 6 Q 9. 0 ACMA Wllh 1/ 7, g46 1 4/a, 6/13 7/9 f/, 7 AGMA Stub 5/10, 6/12, 8/16, 9/11 1 /a 14 “ La
28、 .I “lrln “%“ 2 10 up to 17 1 A 2 ?I 101 up to 129 2 41 up to 65 34 3/, 25 up to 41 2 1 $ 3/, 65 up to 101 346 1 4 4 6 4 17 up to 25 f/, 6 2 All dimensions given in inches. (continued) 23 USA STANDARD Table 14. Sizes and Dimensions of Ground Deep Counterbore Type Finishing Gear Shaper Cutters (For C
29、utting Spur Gears and For Cutting Helical Gears Where the Helical Cutters Have a Circular Type Sharpening) (Cont.) Nominal Tooth Length L PD Nominal Hole Nominal C bore Minimum Web W Normal Diametral Pitch Thickness B 1% 2 1% Standard 1% Optional 3% 73 1, 2% 2% %6 1% Standard 2% 73 5 up to 7 4/8, 5/
30、7, 5/10, 6/8 6/12, 7/9, 8/16, 9/11 6, 7, 8 & 9 AGMA Stub 7 UD to 17 % 1% % 1% 17 up to 25 25 up to 41 1% 2.5 & 3 AGMA Stub % 1% 3 up to 4 3, 4 1% Optional 2% 73 3 3 % % 1% Standard 2% 2% 14 3.5 AGMA Stub 1% 1% 1% Optional Standard 4 up to 5 4 & 5 AGMA Stub 5 up to 7 2.5/5,3/6,4/8,5/7,5/10, 6/8,6/12,
31、7/9,8/16,9/11,6, 7.8 & 9 AGMA Stub 17 up to 25 25 up to 41 1% 2.5/5, 3/4, 3/6 2.5, 3, 3.5, 4 & 5 AGMA Stub .& 1% 1% 2% 3 4% 73 3% 73 1% Optional 3% 3% %6 % 1% Standard 3 up to 7 4/8, 5/7, 5/10 . . 6/8, 6/12 74 6 2% 6 AGMA Stub 7 up to 10 10 up to 17 1% 17 up to 25 74 6 1% 1% 25 up to 41 5 3 %6 % 1% Optional X, g46 74 6 (continued) All dimensions given in inches. 24
