IS 9483: Measuring instruments - Micrometer heads

10 Pages·1993·1.1 MB·English

by  Bureau of Indian Standards

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IS 9483 (1993): Measuring instruments - Micrometer heads
[PGD 25: Engineering Metrology]
“!ान $ एक न’ भारत का +नम-ण”
Satyanarayan Gangaram Pitroda
““IInnvveenntt aa NNeeww IInnddiiaa UUssiinngg KKnnoowwlleeddggee””
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“Knowledge is such a treasure which cannot be stolen”

IS 3849 : 3991
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Indian Standard
MEASURING INSTRUMENTS- MICROMETER
HEADS- SPECIFICATION
( First Revision )
UDC 17-417.135

@ SIB 1993
BUREAU OF INDIAN STANDARDS
KANAM ,NAVAHB 9 RUDAHAB HAHS RAFAZ MARG
WEN IHLED 110002
yraunuJ 1993 ecirP Group 2
gnireenignE ygolorteM lanoitceS ,eettimmoC ML 05
FOREWORD
sihT naidnI dradnatS ( tsriF noisiveR ) was detpoda yb eht uaeruB fo naidnI Standards, retfa eht
tfard dezilanif yb eht gnireenignE ygolorteM lanoitceS eettimmoC had neeb devorppa
by the
thgiL lacinahceM gnireenignE noisiviD .licnuoC
sihT standard was tsrif dehsilbup ni 1980 taking assistance morf SIJ B 3691-4057
‘Micrometer
issued yb eht esenapaJ lairtsudnI Standards eettimmoC ( STJ .)
heads’
nI eht tneserp noisiver gniwollof tnatropmi snoitacifidom evah neeb :edam
)a eltiT fo eht noitacificeps has neeb .degnahc
)b weN sesualc no ,noitinifed noitangised and ycarucca evah neeb .detaroprocni
)c Clauses no erugiF fo ,elacs and pihsnamkrow and hsinif evah neeb .deteled
)d ehT eulav fo ecrof detrexe yb eht evird neewteb eht gnirusaem secaf has neeb deifidom
and dohtem ot enimreted eht ecrof evah osla neeb .detaroprocni
ehT stnemeriuqer fo lanretxe retemorcim evah neeb derevoc ni ST 2967 : 1983 lanretxE‘ -orcim
retem tsrif( revision )‘.
nT the noitaraperp fo this standard, assistance has neeb devired morf eht :gniwollof
JIS B 0891-4057 retemorciM‘ ’sdaeh issued yb eht esenapaJ lairtsudnI Standards ( SIJ .)
0SI 3611 : 1978 retemorciM‘ srepillac rof lanretxe ’tnemerusaem issued yb eht lanoitanretnI
noitazinagrO rof noitazidradnatS ( 0SI .)
roF eht esoprup fo gnidiced rehtehw a ralucitrap tnemeriuqer fo this standard is deilpmoc ,htiw
eht lanif ,eulav, devresbo ro ,detaluclac gnisserpxe eht tluser fo a tset ro ,sisylana shall eb
dednuor KO ni ecnadrocca htiw SI 2 : 1960 seluR‘ rof gnidnuor ffo laciremun seulav ( revised )‘.
ehT rebmun fo tnacifingis secalp deniater ni eht dednuor ffo eulav dluohs eb eht emas as that
fo eht deificeps eulav ni this standard.
SI 3849 : 1993
Indian Sjandard
MEASURING INSTRUMENTS - MICROMETER
HEADS - SPECIFICATION
( First Revision )
1 SCOPE 3.3 noitaiveD fo esrevarT fo eht retemorciM wercS
sihT standard srevoc eht stnemeriuqer fo
ehT mumixam ecnereffid neewteb eht tsehgih
retemorcim sdaeh rof lareneg esu htiw eht tsael
and tsewol stniop rof eht noitaived fo eht
tnuoc ( noituloser ) fo 0.01 mm and deppiuqe
sgnidaer deniatbo gnola eht etelpmoc esrevart
htiw a eldnips wercs gnivah a hctip fo 0.5 mm
fo eht .wercs
ro t .mm
retemorciM-ETON heads edulcni those htiw a 3.4 lacidoireP rorrE
lacinahcem latigid yalpsid .retnuoc
ehT rorre fo tnemerusaem at yna lanoitpo tniop
fo eht gnirusaem .egnar
2 TYPES
ehT retemorcim sdaeh yam eb rehtruf deifissalc 3.5 ehT latoT rorrE
otni gniwollof eerht sepyt gnidneped no eht
elbmiht retemaid D ( see .giF 1 ) : ehT latot rorre fo eht retemorcim sdnopserroc
ot eht mumixam ecnereffid fo eht tsehgih and
epyT 1 woleB 25 mm elbmiht retemaid
tsewol stniop denimreted revo eht eritne -saem
gniru .egnar
epyT 2 morF 25 mm and woleb 50 mm
elbmiht retemaid
3.6 gnirusaeM egnaR
epyT 3 50 mm elbmiht retemaid and revo
tI is a esrevart fo eht gnirusaem eldnips as
derusaem yb eht elacs dedivorp no eht .elbmiht
ehT sessalc fo gnirusaem egnar fo retemorcim
daeh shall mrofnoc ot eht :gniwollof
-o 15 mm
0 mm52-
-o 50 mm

.GIF 1 MICIIOME~R ELBMIHT 4 ERUTALCNEMON

3 DEFINITIONS roF eht esoprup fo this standard, eht -alcnemon
erut nevig ni .giF 2 shall .ylppa
3.1 retemorciM daeH
ETON - sihT erugif shows a lacipyt head ylno dna
ehT retemorcim daeh is a gnirusaem ecived does ton yficeps ngised .serutaef
elbapac fo gnidaer eht ytitnauq fo eldnips
levart gnola eht eldnips sixa gnidnopserroc ot 5 NGISED SERUTAEF
noitator fo eht eldnips .wercs ehT eldnips laixa
levart is daer yb eht elacs no eht lerrab and eht 5.1 ehT slerrab dna selbmiht ni eht esac fo epyT
detaudarg .elbmiht A shank is osla dedivorp 1 retemorcim sdaeh shall eb fo elbatius ytilauq
no eht ecived ot etatilicaf gnitnuom fo eht .leets nI eht esac fo eht rehto sepyt elbatius
retemorcim daeh ni a gnirusaem .erutxif thgil yolla yam eb .desu
3.2 rorrE fo tnemerusaeM 5.2 eldnipS and livnA
ehT laciarbegla ecnereffid neewteb eht -tacidni 5.2.1 ehT wercs daerht no eht eldnips shall evah
de eulav and eht eurt eulav fo eht ytitnauq a hctip of 0.5 ro 1 mm and eht wercs daerht
.derusaem shall eb htooms tif ni eht .tun
IS 9483 : 1993
MEASURING ANVIL RATCHET DRIVE OR
06.35 OR 8mm
.GIF 2 NOMENCLATURFOR E MICROME’~ER SDAEH
5.2.2 erehT shall eb lluf tnemegagne fo eht tun 5.4.4 fI eht elbmiht is ,delleveb eht elgna fo eht
and eldnips wercs tuohguorht eht egnar fo leveb shall eb neewteb 10” and 20”.
.levart ehT tnorf lellarap noitrop fo eht eldnips
shall eb gninnur-eerf tif hcus as 7f-7H ni eht 5.4.5 ehT ecnatsid morf the lerrab ot the
bush tub tuohtiw elbitpecrep laretaL/kreJ detaudarg ecaf fo eht elbmiht shall ton deecxe
.tnemevom 0.4 .mm
5.2.3 ehT eldnips and livna shall eb fo stainless 5.5 Barrel
leets gnivah a hardness fo ton less than 530 VH
ehT ssenkciht fo eht laicudif enil no eht lerrab
ro shall eb fo denedrah hgih edarg loot leets
shall eb eht emas as that fo eht noitaudarg senil
gnivah a hardness fo ton less than 670 VH ( ees
no eht elbmiht and shall eb tcejbus ot eht emas
SI 1501 traP( 1 ) : 1984 dohteM‘ rof srekciV
elbissimrep noitairav ni ssenkciht fo 0.03 .mm
hardness tset rof cillatem :slairetam traP I VH
5 ot VH 100 ( dnoces yehT yam eb
deppit htiw netsgnut edibrac revision ro)‘. rehto elbatius 5.6 Adjustment
drah .lairetam prahS segde shall eb derefmahc
5.6.1 hcaE retemorcim daeh shall eb dedivorp
ot tuoba 0.1 .mm
htiw snaem rof adjusting eht orez .gnittes
5.3 Friction or Ratchet Drive 5.6.2 hcaE retemorcim daeh shall eb dedivorp
ehT eIdnips yam eb dettif htiw a noitcirf ro htiw snaem rof gnitasnepmoc rof raew neewteb
tehctar .evird nehW hcus a evird is ,dettif eht wercs and .tun
ecrof detrexe yb eht evird neewteb eht -rusaem
gni secaf nehw derusaem as rep dohtem nevig -ETON ehT snaem of tnemtsujda llahs eb hcus
that, after ,gnitteser the parts are deruces dna eht
ni xennA A shall eb 10 f 5 N unless esiwrehto lanigiro ycarucca si ton .deriapmi
deificeps yb eht .resu
SETON 6 ACCURACY
1 revetahW eht ecrof ,deyolpme ti dluohs niamer eht
emas tuohguorht eht esrevart fo eht .eldnips 6.1 ehT snoitaived and secnarelot deificeps
woleb and ni elbaT I ylppa ot tnemerusaem edam
2 tI si ton yrassecen ot tif noitcirf ro tehctar evird ot at eht standard erutarepmet ecnerefer -repmet
epyT 2 ro epyT 3 retemorcim sdaeh sa eseht era
yllareneg desu ni noitcnujnoc htiw a laicudif eruta fo 20°C.
.rotacidni
5.4 Thimble 6.2 Deviations and Tolerances
5.4.1 ehT elbmiht @all eb detaudarg htiw 50 ro eldnipsThe noitaived revo a egnar fo esrevart fo 25 mm fo shall eht retemorcim ton deecxe
100 snoisivid gnidrocca ot rehtehw eht hctip fo
3 .mp ehT nofecnarelot eht orez gnittes shall
eht retemorcim wercs is 0.5 ro 1 ,mm hcae
eb as nevig ni elbaT 1.
noisivid gnitneserper IO*O .mm ehT noitaudarg
senil shall eb ylraelc .tuc
6.3 Error of Measurement
5.4.2 ehT ertnec ecnatsid neewteb eht -audarg
noit senil shall eb ton less than 0.8 .mm The mumixam elbissimrep rorre fo -erusaem
tnem xam nehw dekcehc htiw a gnirusaem
F
5.4.3 ehT ssenkciht fo eht noitaudarg senil shall ecrof fo 10 N shall eb as nevig ni elbaT 1.
yllamron eil neewteb 04X4 mm dna 2-O mm tub
the mumixam ssenkciht yam eb 52-O mm nehw 6.4 Measuring Face
the ertnec ecnatsid neewteb eht senil is retaerg
than 1 .mm A noitairav ni enil ssenkciht fo The gnirusaem ecaf shall eb deppal and shall
043 mm si .elbissimrep eb talf nihtiw .mL//I
2
SI 3849 : 1993
Table 1 Permissible Errors for Micrometer Head hctip of 0.5 mm sha.11 eb detangised :sa
( sesolC 6.1, 6.2 and 6.3 ) retemorciM Head SI 9483 - 0 ot 25 - 0.5 p
Measuring Squareness of Tolerance OII Max Permis- 8 GNIKRAM
Range Measuring Zero Setting sible Error
mm Face to Axis f F Mnx eh’I retemorcim head llahs eb ylbigel dna -rep
mp mif mp yltnenam dekram htiw the sliated of elacs
0 ot 15 ,lavretni gnirusaem ,egnar ,sepyt gnirutcafunam
0 ot 25 1 *2 4 ,rebmun ecruos of erutcafunam or kram-edart
0 ot 50 1 374 5 ( fi yna ).
7 NOITANGISED 9 GNIKCAP
retemorciM heads llahs eb detangised yb SI No., Each retemorcim head llahs eb deilppus htiw a
gnirusaem egnar dna .hctip roF ,elpmaxe a elbatius case or .xcb Each retemorcim head
retemorcim head htiw a retnuoc gnivah a llahs eb coated htiw a elbatius ,niht non -orroc
gnirusaem egnar of 0 - 25 mm dna eldnips evis thgil lio dna llr:hs eb yleruces wrapped.
ANNEX A
( Clause 5.3 )
METHOD OF MEASUREMENT OF FORCE EXERTED BY THE DRIVE BETWEEN
THE MEASURING FACES
A-l ecroF exerted yb the evord neewteb the ertnec of gnirusaem face of the .eldnips retfA
gnirusaem faces nac eb derusaem as gnidaer of gnignarra the e!dnips sixa as gnidnats ni -itrev
gnirps epyt etacidni elacs ( elacs lavretni or 20 g lac dna the retniop of gnitacidni elacs or force
Max ) htiw dezilibats nap or force retem retem so as ot etacidni zero ,tniop take the
( ytivitisnes 2@ N Max ) ( see .giF 3 dna 4) as gnidaer of mumixam noitcelfed of retniop -idni
per dohtem nevig ni A-1.1. gnitae elacs or force retem elihw gninrut the
ratchet stop or noitcirf stop. sihT erudecorp
A-l.1 dloH leets llab neewteb the dedaol tniop llahs eb repeated evif semit dna the egareva of
of gnitacidni elacs or force retem dna the the sgnidaer llahs eb nekat as erusaem of force.

STEEL
STEEL
FORCE
FIG. 3 SPRING TYPE IWICATING SCALE fa. 4 FORCE METER
Standard Mark
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srecudorp yam eb deniatbo morf eht uaeruB fo naidnI Standards.
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Amendments Issued Since Publication
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