IS 3665 (1966): Dimensions for involute sided splines

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3 0 Copyright 1967 BUREAU OF 1 NDIAN STANDARDS MANAK BHAVAN. 9 BAHADlJR SHAH ZAFAR MARG NEW DEI,HI 110002 Gr7 h&ch 1967 Is1366591966 Indian Standard Dimensions FOR involute sided splines Transmission Devices Sectional Committee, EDC 44 Chairman Smu L. N. TANDON Members Representing Tata Engineering & Locomotive Co Ltd, Jamshedpur Smu S. RAMAMIJRTHY ( AI&m& to Shri L. N. Tandon ) Snar P. R. A~EYANKAR Indian Diesel Engine Manufacturers Association, Poona &rat M. C. B~tiart New Allenberry Works, Calcutta SHRI J. V. RAQHAVAN (Alternate) SHRI P. N. Guun The Associated Cement Companies Limited, Bombay SHRI V.

4 R. KR~~HNWURTHY Tube Investments of India Ltd, Madras Smu D. -m Srnu M. NAQARAJ ( Al&ma& ) David Brown Greavcs Ltd, Poona SHRI N. Mrrru. Research, Designs & Standards Organlsation ( Ministry of Railways ) Sriar S. R. MURTHY Ministry of Defence ( DGI ) Srinr C. J. C~~RTYAN ( Almnate ) Smu V. R. PHATAK SHRI K. S. PATEL ( Altern& ) Jyoti Limited, Baroda SHRI N. C. SIJXHARAI4wALA The Mysore Kirloskar Ltd, Harihar Smu R. K. RAM~HANDRA Rno ( Altcmare ) SHRI V. VENKATARAMAN Greaves Cotton & Co Ltd, Bombay Ssim M. B. BIIASXARB ( Akaate ) Srmr D. S. M. Vrs~~u Heavy Elcctricals ( India) Ltd, Bhopal.

5 SHoI R. YOOSSHWAR Smu V. A. S. Sarry ( Alkrnalr ) Hindustan Machine Tools Ltd, Bangalore SHRI M. V. PATANXAR, Director ( Mcch Engg ) Director General, IS1 ( $i% Member ) titory Smu S. cgAllD~~~~4 Deputy Director ( Mcch Engg ), ISI ( coaliawd bn pags 2 ) BUREAU OF STANDARDS hlANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARC3 NEW DELHI 110002 IS:3665-1966 ( Confinuedfrom pugs 1 ) splines and Serrations Subcommittee, EDC 44 : 4 Gmvencr SHRI R. YOOEBKWAR Members Rspnscnting Hmdustan Machine Tools Ltd, Bangalore SHRI V. A. S. SRTrY ( &tmrcrh t0 Shri R. Yogeshwar ) SHRl M, C. BAHETI New Allenberry Works, Calcutta SRRI J.

6 V. RAGHAVAN ( Alkmuk ) CHEEP ENOINRRR Heavy Electricals ( India ) Ltd, Bhopal SHIU K. RAMANATHAN ( Alkrnuk ) SHRI D. C. KOXLZ Hindustan Motors Ltd, Uttarpara REPRESENTATIVE Automobile Products of India Ltd, Bombay SHRI G. K. RUIKAR The Mysore Kirloskar Ltd, Harihar SI-IIU R. K. RAMCHANDRA RAO ( A&ma& ) SHRI K. SURYANNUYANA RAO Ashok Leyland Ltd, Madras 2 -_ Indian Standard Dimensions FOR involute sided splines 0. FOREWORD This Indian Standard was adopted by the Indian Standards Institu- tion on 2 July 1966, after the draft finalized by the Transmission Devices Sectional Committee had been approved by the Mechanical Engineering Division Council.

7 05 Splined shafts generally have the following three types of applications: _~ a) Coupling shafts when relatively heavy torques are to be transmitt- ed without slippage, b) Transmitting power to floating or permanently fixed gears, pulleys and other rotating members, and c) Coupling parts that may require frequent removal for indexing or change of angular position. External and internal splines are very extensively used in the automo- bile, machine tools and other industries. This standard has been prepared to rationalize the production and to facilitate interchangeability of exter- nal and internal splines .

8 This standard deals with involute sided splines of 30 pressure angle for general engineeering purposes. Separate standards on straight sided splines have already been prepared (see IS : 2327-1963* and IS : 2610- I96W )* 05 The Dimensions and fits given in the tables are based on the basic hole system. In this system the Dimensions of the internal splines are the basis and variations in fit are obtained by varying the allowance on the external splines . The tolerances for the spline tooth thickness and space width are given in Table 12. The instructions for the use of table is explained in Appen- dk A.

9 The tolerance on major and minor diameters shall be according to the system of limits and fits specified in IS : 919-1963$. Separate standards on gauging practice and the relevant manufacturing tools for splines are under preparation. * Dimensions for straight sided splines for general engineering use. tDimcnsions for straight sided splines for machine tools. ~Rccommendations for limits and fits for enginccriog ( rwised ). 3 IS : 3665 - 1966 As far as possible, the major diameters of external splines are given so as to end in numbers 0, 2, 5 and 8 which are standard diameters for ball bearings.

10 This standard is based on the following principles: a) To cover the standard modules conforming to IS : 2535-1963*; b) The same reference profile is used for all pitches and consequently, used for all profiles; c) Centring by side fit or diameter fit; and d) Use of profile displacement for the purpose of obtaining optimum utilization of materials. This standard is based on draft standard DIN 5480-1964 Blatt 1 to 14 Zahnwellen Verbindungen mit Evolventenflanken ( involute sided splines ) issued by the Deutscher, Nonnenausschuss. For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test, shall be rounded off in accordance with IS : Z-1960?