JIS-B-0614-1987-ENG.pdf

J I S Ba0614 87 4933608 0008430 I I .'JI$ 0 I UDC 62-434 : 621.753.1 / Y JAPANESE INDUSTRIAL STANDARD System of Cone Tolerances JIS B 0 6 1 4 - 1 9 8 7 Translated and Published bY Japanese Standards Association Printed in Japan 8s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- _ J I S B*Ob34 87 m 4933b08 0008433 3 m In the event of any doubt arising, the original Standard in Japanese is to be final authority. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*ObL4 87 4933b08 0008432 5 UDC 62-434:621.753.1 JAPANESE INDUSTRIAL STANDARD J I S System of Cone Tolerances B 0614-1987 1 . Scope applicable to rigid conical workpieces of 1/3 to 1/500 in taper ratio and over 6 mm up to 630 mm in cone length. applicable to the cone tolerances for rolling bearings. This Japanese Industrial Standard specifies the cone tolerances system This Standard, however, is not Furthermore, the taper angle tolerances specified in this Standard are also applicable to the prism workpieces. Remark: This Standard is in accordance with the conical tolerances system specified in IS0 1947-1973 (System of cone tolerances for conical workpieces from c = l : 3 to 1 : 500 and lengths from 6 to 630 mm). 2. Definitions For the purposes of this Standard, the definitions in JIS B 0154 and JIS B 0021 apply. 3. Quantitative Symbols For the purposes of this Standard, the following quantitative symbols apply AT: Taper angle tolerances Remark: The symbol AT is also used for expressing the grade of taper angle tolerance. In that case, a digit expressing the grade shall be suffixed to the symbol AT. ATD: AT,: Taper angle tolerance expressed in unit of length. Taper angle tolerance expressed in unit of angle. c : Basic taper ratio D : Basic largest diameter Dm, : Dmin : Maximum permissible largest diameter Minimum permissible largest diameter d: Basic smallest diameter Applicable Standards, Corresponding International Standard and Reference Standards: See page 11. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ._ J I S B*ObL4 87 4933608 0008433 7 W 2 B 0614-1987 Maximum permissible smallest diameter Minimum permissible smallest diameter Basic cone diameter at specified axial position Actual cone diameter at specified axial position Maximum permissible cone diameter at specified axial direction Minimum permissible cone diameter at specified axial direction Basic cone length Cone diameter tolerance Cone section diameter tolerance Conical shape tolerance Basic taper angle Maximum permissible taper angle Minimum permissible taper angle Maximum taper resulting from cone section diameter tolerance TD 4. Cone Tolerance System 4.1 Basis of Cone Tolerance System The cone tolerance system shall be based on the cone diameter tolerance, taper angle tolerance, cone form tolerance and cone section diameter tolerance. 4.2 Cone Diameter Tolerance The cone diameter tolerance T D is applicable to all the actual cone diameters within the cone length L , and is generally selected from the standard tolerances based on J I S B 0401 according to the largest diameter D of the cone. Remark: The cone diameter tolerance T takes a fixed value for all sections normal to axis. 4.3 Taper Angle Tolerances The taper angle tolerances shall be in ac- cordance with the following: (1) Grades of Taper Angle Tolerance shall be classified into 12 grades of AT 1 to AT 12 corresponding The taper angle tolerance AT to the steps of cone lengtgs (see Attached Table). grades AT O, AT O1 or AT 13 may be used, as required. Values of Taper Angle Tolerance The values of the taper angle tolerances AT, and ATn for respective grades corresponding to the steps of cone length L shall be in accordance with Attached Table. However, - (2) Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Ba0614 87 4933608 0008434 9 3 B 0614-1987 ATn shall be the value in pm unit calculated from the constant AT, within the steps of one cone length, and it shall be applied to the difference A(D-d) between the diametral difference of both ends normal to a cone and the basic value D-d. Remarks 1. The value of AT, (p rad unit) for the grade ATn shall be the preferred number R 10 nearest to the value calculated from the following formula: where Le: geometrical mean of two cone length values dividing the steps of cone length L (in accordance with preferred number R 5.) (mm) n: digit expressing grade 2 . There shall be the following relation between ATD (pm unit) and AT, (mrad unit) ( L in mm unit). ATD= AT, X L The values of ATn corresponding to cone lengths Li and LZ dividing the step of a cone length shall vary as given in Fig. 1. Variation of ATD within Steps ( LI to Lz.) of a Cone Length Fig. 1. L2 Furthermore, the values of grade AT O and grade AT O 1 shall be 1/10 of the values of AT 5 and AT 4, respectively. Also, the values of respective grades AT 13 to AT 17 shail be 10 times the values of respective grades AT 8 to AT 12. (3) Tolerances for Taper Angle be expressed by the one side tolerance of plus or minus in respect to the basic taper angle, or both side tolerances of plus and minus. The tolerances for taper angle shall Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS B*ObL4 87 4933608 0008435 0 4 B 0614-1987 $.AT O AT For example, o -AT or f shall be given. However, in the case of both side tolerances of plus and minus, the values of plus and minus shall be permitted to differ. (4) Tolerance Zone of Taper Angle From the basic taper angle and the position and magnitude of the taper angle tolerances, shall be determsined the taper angle tolerance zone (namely, the fan shaped region between the maximum permissible taper angle and the minimum permissible taper angle). Remark: The taper angle tolerance zone shall be applicable to the angle between the 2 pairs of straight lines of which interval becomes minimum, and which include the straightness of two generating lines of an actual cone, within an arbitrary axial section of an actual taper angle, namely a cone. 4.4 Cone Form Tolerances The cone form tolerance TF shall consist of the straightness tolerances of generator and circularity tolerances of section normal to axis (see Figs. 2 and 3). By the designation of the cone form tolerances, the straightness tolerance zone and circularity tolerance zone shall be determined (see Figs. 2 and 3). 4.5 Cone Section Diameter Tolerance The cone section diameter tolerance T h shall be applicable only to the particular section normal to axis, in the case wheré-the cone diameter tölerance shall necessarily be reduced locally for functional reason or manufacturing reason. 5. Designation of Cone Tolerance The cone tolerance shall be designated for the basic cone by either of the methods (1) and (2) given in the following. The method of designation of this tolerance and the selection of tolerance value shall depend on the functional requirements such as the relative position in axial direction of fitting faces and contacting conditions. (1) Method 1 (Basic Taper Method) In ordinary cases, only the deviations by the cone diameter tolerance Tn in respect to the basic cone shall be designated using the symbol (tolerance symbol) of tolerance zone class in accordance with JIS B 0401. and the cone diameter tolerance zone shall be determined (see Figs. 2 and 3). Thus, the permissible limit cone Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- I J I S B*ObLi.I 87 4733608 0008436 2 5 B 0614-1987 Fig. 2. Permissible Limit Cone, Permissible Limit Cone Diameter, Cone Diameter Tolerance Zone and Straightness Tolerance Zone of Generator St Actual cone. Straightness tolerance zone of generator :raightness tolerance o Cone diameter toelrance zone Fig. 3. Cone Diameter Tolerance Zone and Circularity Tolerance Zone - 'Cone diameter tolerance zone tolerance normal to axis tolerance zone Actual cone If the cone surface is not used for the purpose of fitting, the positions of tolerance zone JS and js shall be selected preferentially. Reference: In the case where only the cone diameter tolerance T D has been designated, the cone diameter tolerance TD also applies to the taper angle, straightness and circularity. Therefore, the actual taper angle shall be permitted to lie between taper angle a (see Fig. 4). TD (mrad) and-da=-T (mradlin respect to the basic Where TD shall be pm unit and L shall be mm unit. Values of ALZ in respect to L = 100 mm are to be given in Reference Attached Table. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- 6 B 0614-1987 Fig. 4. Permissible Limit Taper Angle Generated by Cone Diameter Tolerance If If strictly required, the deviations of taper angle see 4.3 (311 and cone form tolerance TP (see 4.4) in accordance with the taper angle tolerance AT shall be additionally designated. any point on the cone surface shall not be allowed to lie outside the permissible limit cone. In that case also, Remark: In the above case, where the deviation of taper angle is of one side tolerance, the value of AT shall be smaller than T , and where it is of both sides tolerance i9 , it shall be smaller than ¿!TO. The value of TF, also, shall be smaller than %. (2) Method 2 (Taper Tolerance Method) If required for a functional reason or a manufacturing reason, the cone diameter tolerance shall be reduced locally, giving permissible deviations in accordance with cone section diameter tolerance to a specific section normal to axis in respect to the basic cone, and separate from that, the deviations of taper angle in accordance with the taper angle tolerance ATCsee 4.3 (3)l shall be designated. The position of taper angle tolerance zone, in this case, shall vary according the actual cone diameters in a specific section normal to axis see kig. 51. This taper angle tolerance zone shall in no way determines the Furthermore, where rigid specifications exist, the form tolerance permissible deviations of straightness of generator. TF (see 4.4) shall be additionally applied. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*Ob14 87 4933b08 0008438 b 7 B 0614-1987 Fig. 5. Cone Section Diameter Tolerance TDS, Taper Angle Tolerance AT, and Taper Angle Tolerance Zone (a) A case where the actual cone diameter in a specific section normal to axis has the maximum permissible size of the cone diameter. tolerance zone (b) A case where the actual cone diameter in a specific section normal to axis lies between the permissible limit dimensions. Lspecific section normal to axis 1 V .E E (c) A case where the actual cone diameter in a specific section normal to axis has the minimum permissible dimension. Taper angle Specific section normal to axis Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- _ _-_ J I S B*Ob14 87 = 4933608 0008439 A = 26” 21“ 16” 13” 10” 8” 6“ 5” 3” 4” 0.8* 1.3 l 1. 6 1.3e.a 2 1.6*.* 2.5 2*-* 3.2 2.5s 4 3.2s 5 4., 6.3 6. 3-10 5.- 8 0.5* 0.8 O. 6s 1 0.8a.m 1.3 l 1, 6 1.3- 2 1.6.* 2.5 2. . 3.2 2.5a.a 4 3. 2s.- 5 4 6.3 125 100 80 63 50 40 31.5 25 20 16 6 10 16 25 40 63 100 160 250 400 10 16 25 40 63 1 O0 160 250 400 630 10” Sff 6 5” 4 3 2.5” 2/ 1. 5” 1“ o. 3.s. o. 5 0.4* 0.6 O. 5.s. O. 8 O. 6.a. 1 0.8. 1.3 I 1.6 1.3,s. 2 1.6s 2.5 2.*.*- 3. 2 2.5* 4 80 63 50 40 31.5 25 20 16 12.5 10 16” 13” 1 cy 8 6f 5“ 4/ 3/ 2. 5” 2” Step of cone length L Grades of taper angle tolerance AT 7 8 B 0614-1987 Attached Table. Taper Angle Tolerances _ Grades of taper angle tolerance Step of cone length L mm AT 1 pad 50 40 31.5 25 20 16 12.5 10 8 6.3 Grades of taper angle tolerance Step of cone length L mm AT 4 AT 5 AT 6 ATa ATD ATa pad i n - sec. pad iin sec. Over up t o prad sec. 315 250 200 160 125 100 80 63 50 40 1 05” 52” 41“ 33” 26“ 21” 16” 13” 1 Of 8” 500 400 315 250 200 160 125 100 80 63 1 43” 1 22” 1 05” 52” 41” 33“ 26” 21” 16” 13” 6 10 16 25 40 63 100 160 250 400 10 16 25 40 63 1 O0 160 250 400 630 200 160 125 100 80 63 50 40 31.5 25 41” 33” 26” 21ff 16” 13” l(Yf 8” 6 5” AT 8 AT 9 I I ATa mm ATD ATa Over nin sec, prad nin sec pad 2 o00 1 600 1250 1 o00 800 630 500 400 315 250 6 10 16 25 40 63 100 160 250 400 2 45” 2 10” 1 43” 1 22” 1 05” 52” 41” 33” 26” 21” 1250 1 O00 800 630 500 400 315 250 200 160 6 52” 5 30” 4 18” 3 26” 2 45” 2 10” lf 43” 1 22 1 05” 52” 315 100 250 160 200 250 400 125 630 100 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/14/2007 03:05:38 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S B*Ob14 87 4733bUA Oi388440 4 32*.*.*50 40*.63 50*.*80 63. 100 SO-* 125 loo* 160 125-a. 200 160.* 250 200* 320 250.a. 400 9 B 0614-1987 8 O00 6 300 5 O00 4000 3 150 2500 2000 1600 1250 1 O00 Attached Table (Cont'd) I Grades of taper angle tolerance I AT 10 Step of cone length L mm I AT, . Over 6 10 16 25 40 6