IS 1931: Engineer's Files

34 Pages·2000·1.9 MB·English

by  Bureau of Indian Standards

इंटरनेट मानक
Disclosure to Promote the Right To Information
Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.
“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न’ 5 तरफ”
Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”
IS 1931 (2000): Engineer's Files [PGD 5: Assembly Hand
Tools]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता हहहहै””ै”
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”

-
ls 1931 :2000

Indian Standard
ENGINEER’S FILES — SPECIFICATION
( Third Revision)
,
ICS25.100.60

~ BIS2000
BUREAU OF INDIAN STANDARDS
,MANAKBHAVAN,9 BAI-MDUR SHAH ZAFAR MARG
NEWDELHI110002

.4Ugus[ 2000 PricL!croup 10
—
‘““-””-”--~
Assembly Hand ToolsSectional Committee, BP/PE 05
FOREWORD
This Indian Standard (Third Revision) wasadoptedbytheBureau ofIndian Standards, after the draft finalized
bythe Assembly Hand Tools Sectional Committee hadbeen approved bytheProduction Engineering Division
Council.
This standard wasfirstpublished in 1962and itsfirstrevisionwastakenupin 1972after.incorpcmting following
changes:
a) Minimum values of hardness were specified,
b) Tolerance limits were modified, and
c) Sampling plans were also modified.
While second revision was taken up in 1985, this standard was split up as:
IS 1931Spec~lcation forfiles:
Part 1 Technical supply conditions
Part 2 Engineer’s tiles
Part 3 Sawfiles
Part 4 Millfiles
Part 5 Special purpose files
In this revision, the followlng changes havebeen made:
a) The endurance tcst rcquirements havebeen limited tobastard cut ofengineer’s files only. The number
of strokes for stock removal has been reduced to minimize the time taken for testing the files for
endurance test,
b) Dimensions of hand profcr have been incorporated for guidanceonly,
c) Figure showing the usc of hand prover has also been included, and

d) Micro hardness testing has b een made as a type test.
While revising this standard, all the five parts havebeen combined into a single comprehensive standard. The
fileswhich arc indicated in (l\cTables,1,2,4,9, 10and 14arewideIyusedfor forestry work,
The nccdlc tiles havebeencovcrcd inIS 3152:1980 ‘Specificationfor needlefiles(fir.r[ revision)’ and the rasps
have been covered in IS 3587: 1985 ‘Specification for rasps (second revision)’. The files used by instrument
makers,jewellers and dicsinkers.aswellashighspeedsteelfileshavenotbeencoveredintheabovespecification.
While preparing this standard, considerable assistance hasbeen derived from the following standards:
1S0 234/1 : 1983 Files and rasps — Part 1 :Dimensions
1S0234/2 : 1982 Filesand rasps— Part2: Characteristics ofcutissuedbytheInternational Organization
for Standardization (1S0)
BS498 : 1990 Specification for rasps and engineers’ files issuedbythe British Standards Institution
(UK)
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
1S 2 : 1960 ‘Rules for rounding off numerical values (revised)’. The number of significant places retained in
[he rounded off value should bc lhc same as that of the specified value in this standard.
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ls 1931 :2000
Indian Standard
ENGINEER’S FILES — SPECIFICATION
( Third Revision)
1 SCOPE IS No. Title
This standard covers dimensional and test indexed by acceptable quality
requirements, general requirements and methods of level (AQL) for lot-by-lot
tests for engineer’s files. inspection (second revision)
—.—.
2 REFERENCES 2895:1990 Specification forwooden handles
for engineers’ file and engineers’
The following standards contain provisions which
through reference in this text, constitute provisions scrapers (second revision)
of this standard. At the time of publication, the 3748:1990 Tool and die steels (second
editions indicated werevalid. Allstandards are subject revision)
to revision, and parties to agreements based on this 3 NOMENCLMURE
standard are encouraged to investigate thepossibility
3.1For thepurpose ofthis standard the nomenclature
of applying the most recent editions of the standards
given in Fig. 1shall apply.
indicated below:
1SNo. Title L= length (excluding thetang),
620:1985 Wooden 100I handles, general h =widt~
requirements ~ourfh revision) t= thickness,
d =diameter,
150.1(Part 1): Method for Vicker hardness test
L, =length oftaper,
1984 for metallic materials : Part 1
II,=point widfh,
HV5toHV 100(Secondrevision)
t,= point thickness,
2500 (Rut 1): Sampling inspection procedures:
d, =point diamete~ and
1992 Part 1 Attribute sampling plans
a = length oftang.
FILE LENGTH (L)
.

P 4
EDGE
TAPER (LI ) PARALLEL PART
-1
CROSS-SECTiON OF
THE PARALLEL PARTS b
~J#Jj&j$
RECTANGULAR HALF-ROUND TR~NGu~R
(HAND AND FtAT) ROUND SQUARE
I I THRd’&UARf h,
bd
CROSS-SECTIONS OF
di-
POINTS
&fklQ_
FIG. 1NOMENCLAWRE OFFILES

1
1s 1931 :2000
Afileor rasp isconsidered mpcrcdwhenL1isbetween 5 TYPES
25 and 50 percent of length 1.and the dimensions of
5.1 The engineer’sfilesshallbe ofthe followingtypes:
the point b, and d, do not exceed 80 percent of the
dimensions of b and d respectively. a) Flatfiles,
On tapered files and rasps the taper length L, is b) Handfiles,
measured from the point to the parallel part of the
c) Half round files,
tile or rasp.
d) Round tiles,
4 CUTS
e) Square files,
4.1 There shall befour grades ofcuts,namely,bastard,
second cut, smooth and dead smooth. The number of $ Three square tiles,
cuts shall be measured along the centre line of the -..—
g) Wardingfiles,
file.
h) Knife files,and
4.2 There shall be two types of cuts for the files:
j) Feather edge files.
a) Single cut, and
b) Double cut. 5.2 The sawfiles shall be of the following types:
4.2.1 Single Cut a) Taper sawfiles,
Single cut shall mean a set of parallel cuts on b) Band sawtaper regular files,
lhc surface, except where otherwise specified
c) Blunt hand sawtiles,
(see Fig. 2).
d) Double ended saw files,
4.2.2 Double Cut
e) Pit sawfdes,
Double cut shall mean two sets of parallel cuts on
the surface, one of which shall cross the other. The t) Cant sawfiles, and
first cut and the second cut are called over cut and
g) Cross cut sawfiles.
up cut respectively (see Fig. 2). Where the files are
double cut, the number of cuts per centimetre shall 5.3 The mill files shall beofthe following types:
relate to the number of up cuts pcr centimetre.
a) Tapermillfil~
4.3 Other types of cuts, like wavy cut, curved cut,
b) Parallelmillfilcx+and
which are also in use, shall be permitted as special
requirement subject to agreement between the c) Bluntheavymillfiles.
purchaser and the supplier.
5.4 The speeialpurpose files shall be ofthe following
4.4 Details of the cut, such as singl e or double cut, types:
aud number of cuts per cenlimctre applicable tofiles
a) Hand finishing files,
of different types shall be as given in the relevant
Tables. b) Cabinet tiles,
4.5 Safe Edges
c) Reaper files, and
Those edges ofthe files which are notcutand are left
d) Block files.
smooth, shall be called safe edges.
I
SINGLE
FIRS
(OVE
DOUBLE CUT
FIG. 2 ANGLE AN D PATTERN OF CUT
2
ls 1931 :2000
6 MATERIALANDHARDNESS spiral form) or double-cut.For files oflength 150mm
6.1 Material and above, these shall have double cut. Second cut
and smooth files of all sizes, shall have single cut or
The material for the manufacture of files and hand-
doublecut (preferably ofspiral form). Files shall have
prover shallbenormally of designation 118T3 or 133
cuts up to the point.
T3 according to IS 3748 or any suitable alloy steel.
7.L5 Square Files
6.2 Hardness
The hardness of the cutting portion of the files shall 7.1.5.1 The dimensions ofthe square files shall be as
be 745 HV (=62 HRC), Min on the tip ofthe teeth as given inTable 5.
measured by the micro hardness tester.
7.1.5.2 Square files shall be of square cros.+section,
7 Dimensions ANDSHAPES parallel for approximately two-thirds tile length and
7.1 Engineer’s Files then tapering towards the point. All sides shall have
double cut. Files shall have cuts up to the point.
7.1.1 Flat Files
7.1.6 Three Square Files
7.1.1.1 The dimensions of the flat files shall be as
given inTable 1. 7.1.6.1 The dimensions ofthe three square files shall
7.1.1.2 Flat files shall be of rectangular cross-section, beas given in Table 6.
parallel for approximately two-thirds file length and
7.1.6.2 Three square files shall be of equilateral
then tapering towards the point in width and parallel
triangular cross-sectio%parallelforapproximately two-
or slightly tapering in thickness. Both edges may be
thirds file length and then tapering towards the point.
either square or-round. The sides shall have double
All sides shall have double cut. The edges shall be
cut, whereas the edges shall have single cut.
uncut or cut. Files shall have cuts up to the point.
7.1.2 Hand Files
7.1.7 Warding Files
7.1.2.1 The dimensions of the hand files shall be as
given in Table 2. 7.1.7.1 The dimensions of the warding files shall be
asgiven in Table7.
7.1.2.2 Hand files shallbeofwtangular cross-seetio~
andparatlel inwidththroughout.Theseshallbeparatlel 7.1.7.2 Warding files shall be of rectangular cross-
in thickness for approximately two-thirds file length scction, parallel in thickness throughout, parallel in
and rest tapering towards the point. Both edges may widthforapproximatelytwo-thirds filelength and then
beeither square or round. The-sides shall havedouble
tapering towards the point. The sides shall have
cut. One edge shall beof sing]ecut,whereas theother
double cut, whereas the edges shall have single cut.
shall be the safe edge.
Files shall have cuts up to the point.

7.1.3 Half Round Files
7.1.8 Knife Files
7.1.3.1 The dimensions ofthe half round filesshallbe
as given in Table 3. 7.1.8.1 The dimensions of the knife tiles shall be as
given inTable8.
7.1.3.2 Half round files shall be of one side flat and
other convex cross-section, parallel for approximately 7.1.8.2 Knife files shall be of uniform wedge
two-thirds file length towards the point in width and cross-section,having thethinner edge straight, thicker
then parallel orslightly tapering inthickness.Flat side edgeparalleltothethinner edgeforapproximatelytwo-
for files of all grades of cut, shall have double cut. thirds file length and then tapering towards the point.
The convex side shall have double cut for bastard The sides shall have double cut. The thinner edge
files, single cut or double cut for second cutfiles and
shall have single cut, whereas the thicker edge shall
single cut or double cut for smooth files. Files shall
be left uncut. Files shall have cuts up to the point.
have cuts up to the point.
7.1.9 Feather Edge Files
7.1.4 Round Files
7.1.4.1 The dimensions of the round files shall be as 7.1.9.1 The dimensions ofthe feather edge files shall
beas given in Table 9.
given in Table 4.
7.1.4.2 Round files shall be of circular cross-section, 7.1.9.2 Feather edge, files shall be of elongated
parallel for approximately two-thirds tile length and diamond cross-seetio~ parallel inwidth and thickness
then tapering towards the point. Baslardfileslessthan throughout. All-sidesshall have single cut.Files shall
150mm in length shall have single cut (preferably of have cuts up to the point.

3
IS 1931:2000
Table 1Dimensions and TestRequirements forFlat Files
(Ckwse7.1.1.1)
All dimensions in millimetres.
\ L
+ t
p-x InE
(
b
*X x-x
r 111111I1111 4
S1 No. Nominal Dimensions No. of Up Cuts per Test Requirements
File
n
Length /— Y
~~ ~
L b t a Bastard Second Smooth War- Distor- Minimum
cut page, tion Length of
A4ax Test Bar to
he Filed
Away Within
30 000
Strokes for
Bastard Cut
(1) (2) (3) (4) (5) (6) (7) (8) (9) (lo) (11)
i) 100 12 2.5 40 16 16.5 23.5 2“ 0.20 -
ii) 150 16 4 50 12.5 15 20 2“ 0.20 –
iii) 200 20.5 5 60 10 12.5 17 2“ 0.25 -
iv) 250 25 6 70 8 11 16.5 2“ 0.65 150
v) 300 30 6.5 80 7 10 16 2“ 0.65 200

vi) 350 35 7.5 90 6.5 9.5 15 2° 1.3 250
vii) 400 39 9 100 6 9 14 2“ 1.5 280
viii) 450 43.5 9 110 6 8 13.5 2“ 1.5 300