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IS 14585 (1998): Spline Hobs - Involute Sided [PGD 32:Cutting tools]

IS 14585:1998

Indian Standard

SPLINE HOBS - INVOLUTE SIDED - SPECIFICATION

ICS 25.100.20

0 BIS 1998

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

December 1998 Price Group 1

Milling Cutters, Saws, Gear Cutting Tools and Broaches Sectional Committee, PE 1 I

FOREWORD

This Indian~Standard was adopted by the Bureau of Indian Standards, after the draft finalized by the Milling Cutters, Saws, Gear Cutting Tools and Broaches Sectional Committee had been approved by the Production Engineering Division Council.

This is one of the standards on spline and serration hobs. bother Indian Standards in this series are:

IS 14584 : 1998 Spline and serration hobs - Technical supply conditions

IS 10608 : 1998 Spline hobs - Straight sided - Specification (first revision)

IS 14586: 1998 Serration hobs - Straight sided - Specification

Other related Indian Standards are:

IS 8731 : 1978 Technical supply conditions for general purpose gear hobs

IS 8732 : 1978 Single start gear hobs with axial keyway

IS 8733 : 1978 Tolerances for single start gear hobs

In preparation of this standard, considerable assistance has been derived from DIN 5480-19 Involute splines; testing and gauges for side fit’, issued by Deutsches Institut fiir Normung (DIN).

IS 14585 : 1998

Indian Standard

SPLINE HOBS - INVOLUTE SIDED - SPECIFICATION

1 SCOPE

This standard covers the dimensions and other requirements for involute sided spline hobs, suitable for splines according to IS 3665 : 1966 Dimensions for involute sided splines.

2 REFERENCES

The following standards contain provisions which through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editionsofmthe standard indicated below:

IS No. Title

3665 : 1966 Dimensions for involute sided splines

14584: 1998 Spline and serration hobs - Tech- nical supply conditions

8733 : 1978 Tolerances for single start gear hobs

3 DIMENSIONS

The dimensions of involute sided spline hobs are give11 in Table 1.

4 ACCURACY

The accuracy for involute sided spline hobs shall be as per IS 8733.

5 GENERAL REQUIREMENTS

5.1 Requirements not covered in this standard, are covered in IS 14554.

5.2 Gashing may be done preferably in perpendicular direction and in opposite helix of hob thread, when setting angle for hobbing (lead angle of thread) is more than 3”. This gashing may also be parallel to hob axis and marked with symbol (infinity) for the gash lead and setting angle for sharpening is 0”.

6 DESIGNATION

An involute sided spline hob with right hand thread of module 4 mm, having profile-1 (suitable for side fit splines according to IS 3665) and grade of accuracy ‘A’ made of high speed steel and confirms to this standard shall be designated as:

Involute sided spline hob IS 14585 -1-A 4

7 MARKING

7.1 The product shall be marked with the following details:

a) Manufacturer’s name or trade-mark,

b) Dc;ign;:ion,

c) Setting angle for hobbing,

d) Gash lead, and

e) Accuracy.

IS 14585 : 1998

Table 1 Dimensions of Involute Sided Spline Hobs (Clause 3)

Al: dimensions in millimetres.

RECESS OPTIONAL

x-x

Module In

1.0 I .25 1.50 2.00 2.50 3.00 4.00 5.00 6.00 8.00

10.00

D L e d

50 31 3 22

50 31 3 22 56 38 3 22

63 46 3 21 70 56 3 27

80 69 3 32

90 7x 4 32 100 88 4 32 110 108 4 40

125 138 4 40

140 170 5 40

NOTE-The dimensions of hub diameter ‘dl’, number of gashes, lead angle and gash lead are left to the manufacturer’s discretion. The diameter ‘C/Z’ shall be as large as possible and greater than the spacing ring. Hub diameter may be conical or cylindrical.

2

Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Endian Standards Act, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods._and attending to connected matters in the country.

Copyright

BIS has the copyright of all its publications; No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of * implementing the standard, of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be addressed to the Director (Publication), BIS. *

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of ‘BIS Handbook’ and ‘Standards Monthly Additions’

This Indian Standard has been developed from Dot: No. PE I I ( 5318 1.

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

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