Page 277 - Content.pmd

CkR úWd Be¡s GuTÕ lðh¥u
(ØßdÏ) úLôQUôÏm.
¡°VWuv Be¡s (Clearance angle)
(Fig 6) ¡°VWuv Be¡s ùYhÓm
®°m×dÏl ©u×\m h¬p EWônYûRj
RÓdL HtTÓjRlThP úLôQm CûPùY°d
úLôQm (Clearance angle) BÏm. CR]ôp
T¦lúTôÚû[ Õû[jÕd ùLôiÓ h¬p
Esú[ ùNpX HÕYôÏm. CkR CûPùY°d
úLôQm ªLÜm A§LUôL CÚkRôp ùYhÓ h¬p ùTVo ϱl©ÓRp (Designation of drills)
®°m©Ls YÛ®ZkÕ®Óm. CÕ ªLÜm Ó®vh h¬p ùTVod ϱlÀÓ
Ïû\YL CÚkRôp ùYhÓm T¦ ¸rdϱl©hÓs[ûYL°u A¥lTûP«p
SûPùT\ôÕ. CÚdÏm.

• ®hPm (diameter)
• h¬p YûL (tool type)

• h¬pXõu êXlùTôÚs (tool material)
ERôWQm 9.50ª.Á ®hPØûPV H.S.S Bp
B] ‘H’ YûL YXÕ ùYhÓ Ó®vh
h¬pXõu ùTVo ¸rLiPYôß
ϱl©PlTÓm.
h¬pXõu YûL ϱdLlTP®pûX G²p Type
£Np Ghw Be¡s/ùYl Be¡s (chisel Diameter of drill
edge angle) (Fig 7)
IS NO.
£Np Gh´tÏm ùYhÓm ERhÓdÏm (cutting Twist drill 9.50 - H - IS5101 - HS
lip) CûPúV Es[ úLôQm CÕ BÏm.
Material
Tool type

TXYûLVô] EúXôLeLÞdÏ Ht\ h¬pLs (Drills for different materials)
T¬kÕûWdLlTÓm h¬pLs (Recommended drills)

Õû[«P Tô«ih ùa≠dv Õû[«P Tô«ih ùa-dv
úYi¥V EXôLm Be¡s úLôQm úYi¥V Be¡s Be¡s úLôQm
(Material to be drilled) (Point angle) (Helix angle) (Material to be drilled) (Point angle) (Helix angle)
d=3.2-5 5-10 10- d=3.5-5 5-
G@Ï Utßm G@Ï ùNm× (30ª.Á
Yôol× 70 ¡/¡ ªÁ 2 ®hPm YûW)
NômTp Yôol×, AÛª²V LXûY
CÚm×, §\u NômTp EúXôLm (ÑÚs
Yôol×, ùS¡rYûL ©£oLs ùLôÓlTûY)
Yôol×, CÚm×, ùNpÛXôn
©jRû[, ù_oUu,
ùYs°, ¨dLp

©jRû[, CuZn 40 BvùP²¥d G@Ï,
UdÉ£Vm LXûY

256 £_õ & Gm: @©hPo (NSQF - Revised 2022) - R.T. for Ex. No.1.5.62