Page 271 - Fitter - 1st Yr - TT - Punjab
P. 271
ਸਟੈਂਡਿਡ ਮਾਿਰਕੰਗ ਰਸਸਟਮ ਨੂੰ ਦਿਸਾਉਂਦਾ ਚਾਿਟ ਹੈ: 551-1966 (ਸਾਿਣੀ - 2) ਸਾਿਣੀ 2
ORDER OF MARKING
3 1 2 3 4 5 6
Nature of Type of Grain Grade Structure Type of Manufacturer’s
Wheel Abrasive Size bond Reference
51 A 36 L 5 V 23
Manufacturer’s Manufacturer’s
symbol indicating own identification
the exact nature of mark for the
Abrasive (optional) wheel (optional)
ALUMINIUM OXIDE – A
SILICON CARBIDES – C
V – VITRIFIED
S – SILICATE
R – RUBBER
RF – RUBBER REINFORCED
B – RESINOID (SYNTHETIC RESINS)
BF – RESINOID REINFORCED
E – SHELLAC
Mg – MAGNESIA
COARSE MEDIUM FINE VERY FINE
10 30 220
12 36 80 240
14 46 280
16 54 100 320
20 60 120 400 SPACING FROM THE CLOSEST
24 150 500 TO THE MOST OPEN
180 600 0 8
1 9
2 10
3 11
4 12
5 13
6 14
7
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
♦ SOFT ∅ ♦ MEDIUM ∅ ♦ HARD ∅
CHART ILLUSTRATING STANDARD MARKING SYSTEM IS : 551 – 1966
CG & M - ਫਿਟਰ - (NSQF ਸੰਸ਼ੋਧਿਤੇ - 2022) - ਅਿਰਆਸ ਲਈ ਸੰਬੰਿਰਤ ਸਰਿਾਂਤ 1.5.74 - 76 249
