IS 14872-2: Ball Screws, Part 2: Nominal Diameters and Nominal Leads - Metric Series

8 Pages·2000·0.95 MB·English

by  Bureau of Indian Standards

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IS 14872-2 (2000): Ball Screws, Part 2: Nominal Diameters
and Nominal Leads - Metric Series [PGD 2: Machine Tool
Elements and Holding Devices]
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IS 14872 (Part 2) :2000
ISO 3408-2 : 1991

Indian Standard
—.
BALL SCREWS
PART 2 NOMINAL DIAMETERS AND NOMINAL LEADS — METRIC SERIES
ICS 25.060.99

0 BIS 2000
BUREAU OF INDIAN STANDARDS
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
September 2000 Price Group 1
Machine Tool Elements and Holding Devices Sectional Committee, BP 02
NATIONAL FOREWORD
This Indian Standard (Part 2) which is identical with ISO 3408-2:1991 ‘Bail screws — part 2: Nominal 1.
diameters and nominal leads — Metric series’ issued by the International Organization for Standardiza-
tion (ISO), was adopted by the Bureau of Indian Standards on the recommendation of the Machine Tool
Elements and Holding Devices Sectional Committee and approval of the Basic and Production Engi-
..
neering Division Council.
This standard deals with ball screws used on machine tools and is being issued in the following parts:
Ball Screws—
Part 1 Vocabulary and designation
Part 2 Nominal diameters and nominal leads — Metric series
Part 3 Acceptance conditions and acceptance tests
Part 4 Ball screw axial rigidity
Part 5 Distribution of static and dynamic loads and operational life
At the moment only standards on Parts 1, 2 and 3 are being issued whereas standards in regard to
Parts 4 and 5 will be issued as soon as the work on them is completed at the International level.
The text of the ISO Standard has been approved as suitable for publication as Indian Standard without
deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention
is particularly drawn to the following:
a) Wherever the words ‘International Standard’ appear referring to this standard, they should
be read as ‘Indian Standard’:
b) Comma (,) has been used as a decimal marker while in Indian Standards the current
practice is to use a point (.) as the decimal marker.
In the adopted standard, reference appears to one International Standard for which Indian Standard
also exists. The corresponding Indian Standard which isto be substituted in its place is listed along with

its degree of equivalence for th e edition indicated.

International Standard Corresponding Indian Standard Degree of
Equivalence
ISO 3408-1 :1991 Ball screws IS 14872 (Part 1) :2000 Ball screws: Identical
— Part 1: Vocabulary and Part 1Vocabulary and designation
designation (f3i/ingua/ edition)
For the purpose of deciding whether a particular requirement of this standard iscomplied with, the final
value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accor-
dance with IS2:1960 ‘Rules for rounding off numerical values (revised) ’.The number of significant places
retained in the rounded off value should be the same as that of the specified value in this standard.
IS 14872 (Part 2):2000
ISO 3408-2:1991
Indian Standard
BALL SCREWS
PART 2 NOMINAL DIAMETERS AND NOMINAL LEADS — METRIC SERIES
.
1 scope 6–8–10–12–16–20–25–32 –40-50–
63-80 -100 -125 -160and 200.
This part of ISO 3408 specifies the nominal diameters and
nominal leads, metric series, for ball screws. It also gives
preferred combinations of nominal diameter and nominal lead
5 Nominal leads
and a general plan which includes additional combinations to
be used when it becomes necessary to deviate from the pre-
ferred combinations. The following series of nominal leads, in millimetres, shall be
used:

2 Normative reference 1–2–2,5–3–4–5–6– 8–10–12–?6–
20 – 25 – 32 and 40.
The following standard contains provisions which, through
Where possible, preference shall be given to the following
reference in this text, constitute provisions of this part of
nominal leads, in millimetres:
ISO 3408. At the time of publication, the edition indicated was
valid. All standards are subject to revision, and parties to
2,5–5–10–20and 40.
agreements based on this part of ISO 3408 are encouraged to
investigate the possibility of applying the most recent edition of
the standard indicated below. Members of IEC and ISO main-
tain registers of currently valid International Standards.
6 Combinations of nominal diameters and
ISO 3408-1 : 1991, Ball screws – Part 1: Vocabulary and nominal leads
designation.
6.1 Preferred combinations
3 Definitions See table 1.
For the purposes of this part of ISO 3408, the definitions given 6.2 General plan
in ISO 3408-1 apply.
Seetable 2.
4 Nominal diameters For preferred combinations, use the nominal lead values which
are underlined. When itbecomes necessary to deviate from the
The following series of nominal diameters, in millimetres, shall preferred combinations, use the nominal lead values which are
be used: not underlined.
IS 14872 (Part2) :2000
ISO 3408-2:1991
Table 1
Dimensions inmillimetres
Nominal I
Nominal Iced
diameter
6 2,5
8 2,5
10 2,5 5
12 2,5 5 10
16 2,5 5 10
20 5 10 20
-..
25 5 10 20
32 5 10 20
40 5 10 20
50 5 10 20
63 5 10 20
60 10 20
10U 10 20
125 10 20
160 20
200 20
Table 2
Dimensions inmillimetres
Nominal
Nominal Iced
diameter
6 1 2 2,5
—
8 1 2 G 3
10 1 2 GL 3 4 ~ 6
12 2 2,5 3 4 5 6 8 ~ 12
16 2 ILii 3 4 ~_ 6 8 ~ 12 16
20 3 4 g 6 8 ~ 12 16 g

25 4 —5 6 8 10 12 16 g 25
32 4 5 6 8 G 12 16 20 25 32
40 i— 6 8 h_ 12 16 i—ii 25 32 ~
50 5 6 8 ~ 12 16 20 25 32 40
63 ;— 6 8 10 12 16 G 25 32 &
60 6 8 h_ 12 16 _G 25 32 g
lcm y 12 16 20 25 32 Q
125 —1.0 12 16 & 25 32 40
160 12 16 ii 25 32 ~
200 12 16 z—) 25 32 ~

2
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Amendments Issued Since Publication
Amend No. Date of Issue Text Affected
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