Page 72 - Electrician -1st Year - TT

Table 1 - Conversion table SWG to mm/inch ªL ªL ÕpXõVUôL A[ÜLs A[dÏm
LÚ®VôÏm. ùTôÕYôL CR]Õ ÕpXõV
SWG No. mm inch
A[Ü (accuracy) 0.01 ª.ÁdÏs CÚdÏm.
0 8.23 0.324
1 7.62 0.300
2 7.01 0.276
3 6.40 0.252
4 5.89 0.234
5 5.38 0.212
6 4.88 0.192
7 4.47 0.176
8 4.06 0.160
9 3.66 0.144
10 3.25 0.128
11 2.95 0.116
12 2.64 0.104
13 2.34 0.092
14 2.03 0.080 ûUdúWô ÁhPWô]Õ, ùY°l×\ A[ÜLû[
15 1.83 0.072 A[dLlTVuTÓYRôp ARû] AÜhûNÓ
16 1.63 0.064 ûUdúWô ÁhPo (outside micrometers) G]
17 1.42 0.056 AûZdLlTÓ¡\Õ. (Fig 2).
18 1.22 0.048
19 1.02 0.040 Fig 2
20 0.91 0.036
21 0.81 0.032
22 0.71 0.028
23 0.61 0.024
24 0.56 0.022

25 0.51 0.020

26 0.46 0.018
27 0.42 0.0164
28 0.38 0.0148 ûUdúWô ÁhPo (micrometer) úYûX
ùNnÙm RjÕYm (Principle of the micrometer)
29 0.34 0.0136
ûUdúWô ÁhPo (micrometer) B]Õ, §ÚLô¦
30 0.31 0.0124 Utßm §ÚÏ (screw and nut) RjÕYj§u
31 0.29 0.0116 A¥lTûP«p úYûX ùNn¡\Õ. ¿[Yôd¡p
(longitudinal movement) v©u¥p JÚ Øû\
32 0.27 0.0108
Ñt±]ôp AÕ §ÚLô¦«u ©hf (pitch)
33 0.25 0.0100 çWj§tÏ NUUôÏm. ©hf çWj§tÏ

34 0.23 0.0092 v©u¥p SLÚRp ApXÕ AR]Õ ©u]
A[ÜdÏ SLÚRûX úTWp Utßm §m©°u
35 0.21 0.0084 ÁÕ A[dL Ø¥Ùm.

36 0.19 0.0076 A[ÜdϱÂÓLs (Graduations)

Lm©«u A[ûY AÜhûNÓ ûUdúWô ùUh¬d ûUdúWô ÁhPoL°u v©u¥p
ÁhPo TVuTÓj§ A[®Pp (Measurement (spindle) UûW (thread-)-L°u CûPùY°jçWm
of wire size by Outside micrometers) : AÜhûNÓ (pitch) 0.5 ª.Á BÏm.
ûUdúWô ÁhPo (outside measurements) GuTÕ
52 TYo : GXdh¬μVu (NSQF - Revised 2022) R.T. Ex.No. 1.2.17 -19