Page 303 - Content.pmd

Lô¥Ls ùLôiP Õû[L°p UûW«P
CqYûL úPlLs ªLÜm TVuTÓ¡u\].
úPl©u ÑÚ[ô] LûWlTϧVô]Õ (land)
UûW«PlTP úYi¥V TWl×L°p HtTÓm
RûPLs ÁÕ TôXUôL AûUV ERÜ¡\Õ.
úPl©p CÚdÏm @×íhLs SßdÏ £Vo
Lh¥e (shear cutting) ERÜ¡u\]. CûY
ùTÚmTôÛm AÛª²Vm, ©jRû[, ùNm×
(Blind holes) êÓÕû[L°p UûW«Óm úTôÕ
úTôu\ ¿ÞkRuûUÙûPV (ductile)
©£oLs úNL¬dL ùNnV úRûYVô] CPm
EúXôLeL°u êÓ Õû[L°p UûW«Pl
CÚdL úYiÓm.
TVuTÓ¡u\].
CÕ ©£o AûPl× HtTÓYûRj RÓjÕ,
vûTWp @×íh úPl úYLfÑÚs
úPl EûPYRtLô] Yônl×Lû[
ùLôiPûYVôLÜm ¡ûPdÏm. (Fig 5) CkR
Ïû\d¡\Õ. CqYûL úPl×L°p @×íh
ALUûW ùYh¥Ls BZUô] Õû[L°p
(Flute) BZUt\ûYVô] CÚlTRôp ALUûW
UûW«Pl TVuTÓ¡u\]. Hù]²p CûY
ùYh¥Ls YXõûUVô]ûYVôL CÚd¡u\].
©£oLû[ Õû[«XõÚkÕ úYLUôL
@×íhXv (Flute-less) úPl ØßdÏ Øû] ùY°úVtß¡u\]. (Fig 6)
vùPl ×Þh úPlv ALUû\ ùYh¥)
(Fluteless spiral pointed tap) (Stub flute taps) (Fig 3)

CqYûL úPlL°p N¬Yô] Øû]lTϧ«p
£±V úLôQUôL AûUkR ÏûZÜ
AûUdLlThÓ CÚdÏm. ©\ Tϧ §P
¨ûX«úXúV ®PlTh¥ÚdÏm. CqYûL
úPlLs Li úPlûT ®P YXõûU
B]ûYVôÏm.
×íh ùXv úPlLs

ùTÚmTôÛm Õû[«u ®hPjûR ®P
L]m Ïû\YôL Es[ EúXôLeL°u Es[
ÕÚ úaôpvL°u UûW«Pl UûW EÚYôdÏm úPlLs (Thread forming
TVuTÓ¡u\]. ×íh ùXv vûTWp
taps)
ALUû\ ùYh¥Ls ªÚÕYô] EúXôLeLs
ApXÕ ùUpXõV EúXôLl TϧL°p CqYûL úPlLsÕû[L°p, ùYhÓ
UûW«P ªLÜm ùTôÚjRUô]RôÏm. Øû\«p ApXôUp (Fig 7) EúXôLjûR
CPlùTVof£ ùNnÙm Øû\«p UûWLû[
ùaXõdLp @×íh úPl/vûTWp ×íh EÚYôdÏ¡u\].
úPl (Helical fluted taps/spiral fluted taps)

UûW«PlTÓm Õû[L°XõÚkÕ ©£oLû[
ùY°úVt\ vûTWp ×Þh CûYL°u
AûUdLlTh¥ÚdÏm. (Fig 4)
CqYûL úPlLs ùY°úV ¿i¥ÚdÏm
ílvLû[ (lobe) ùLôi¥ÚdÏm. CûY Rôu

282 £_õ & Gm: @©hPo (NSQF - Revised 2022) ------ R.T. for Ex. No.1.5.68-69