Page 75 - Plumber- TT - 1st Year - Tamil

¬Åh (Rivets): TôLeLs: ¸rdϱl©hPûYLs ¬Åh¥u
TôLeLs BÏm. (Fig 14)
¬ÅhLs ùNÚLlThÓ AûY ®ûN êXm
êPlTÓ¡u\]. CR]ôp Õû[ ØÝYÕUôL • RûX (Head)
¨WlTlThÓ EߧVô] CûQl× • EPp (Body)
HtTÓjRlTÓ¡\Õ. (Fig 13)
• Yôp (Tail)
Fig 13
Fig 14

ETúVôLeLs (Uses): ¬ÅhLs EúXôLj
RLÓLû[Ùm ©ú[hLû[Ùm, LhÓUô]
úYûXL[ô] TôXeLs, LlTpLs, dúWuLs,
Lh¥P G@Ï úYûXLs, TônXoLs BLôV
®Uô]m ØRXõVûYL°p, CûQlTRtLôLl
TVuTÓjRlTÓm TôN]oLs (©ûQl©Ls)
(Fastners) BÏm.

TXYûL ùY°UûW ùYhÓRp (Different type of outer thread cutting)

ùSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• UûWL°u YûLLû[l Tt± ϱl©PRp
• ^óÏÚ §WhL°u TôLeLû[l Tt± ϱl©ÓRp
• TXYûL ûPþvPôdLû[l Tt± ϱl©ÓRp
• vPh TVuLû[l Tt± ϱl©ÓRp.

UûWLs þ 'V' UûW«u YûLLÞm Utßm • A.N.S UûW AúU¬dLu úSx]p ApXÕ
TVuLÞm (Screw threads - types of 'V' threads ùNpXo UûW þ (American national or seller's thread)
and their uses)
• BIS ùUh¬d UûW þ Ck§V RW ¨oQV
UûWL°u ùYqúYß YûLL[ôY] (The ¨ßYQj§u ùUh¬d UûW (Bureau of
different standards of V threads are): standard metric thread)
• BSW UûW þ ©¬h¥x vPôiPoh (Standard) BSW UûW (BSW thread) (Fig 1)
®h ùYôoj UûW (British Standard whit worth
thread) CRu úLôQm 55° BÏm. CkR UûW«u BZm
1/2BSW, 1/4BSW CRu Ef£ Utßm úYo
• BSF Öi UûW þ ©¬h¥x vPôiPoh ϱl©hP BWj§tÏ AûW YhPm
ÖiUûWLs (British Standard fine thread)
ùNnVlTh¥ÚdÏm. TPj§p UûW«u
• BSP ûTl UûW þ (British Standard pipe thread) ׬«ûUjçWm Utßm ©\ TôLeLÞdÏ
©¬h¥x vPôiPoh ûTl UûW EiPô] ùRôPoTLm ®Y¬dLlThÓs[Õ.
• B.A UûW þ ©¬h¥x AúNô£úVNu UûW BSW UûWL[ô]Õ YûWTPj§p ARu
ùUh¬d UûW þ (British Association thread) ùT¬V ®hPjûR ùLôÓlTRu êXm
ϱdLlTPXôm. ERôWQUôL TpúYß
• I.S.O ùUh¬d UûW þ NoYúRN RW ¨oQV
¨ßY]j§u ùUh¬d UûW (International 1/2” BSW, 1/4” BSW ®hPeLÞdLô]
standard organisation metric thread) YûWVßdLlThP JÚ AeÏXjÕdÏ Es[
©[m©e þ ©[mTo (NSQF - Revised 2022) - R.T. for Ex. 1.3.14-17 55