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P. 415

AûUdLlThÓs[ UûW«PlThP LôXo (high carbon steel Bp) ùNnVlThÓ
UûW«u ER®Vôp Nd þI (chuck) éhÓ¡\Õ L¥]lTÓjRlThÓ TRlTÓjRl Th¥ÚdÏm.
(lock TiÔ¡\Õ) Utßm taper Utßm key (Hardened and tempered) CûYLs EPt
ER®Vôp locate TiÔ¡\Õ. £X Nd¡p TÏ§«u (body) §\l×L°p (openings)p SLÚm
(chucks) úTd ©ú[h (backplate) CÚlT§pûX. (slide BÏm) CkR _ôv (Jaws) RôûPLû[j
§Úl© ETúVô¡jÕ (reversible) EsÇPt\
EPtTÏ§ (Body)
T¦Lû[ (hollow work) ©¥dLXôm.
EPtTÏ§Vô]Õ úLvh AVou/úLvh
v¼Xôp ùNnVlThÓ ARu ØLl× (face) _ôdL°u ©u×\m square-thread
CPlTh¥ÚdÏm. CûYLs RôûPLû[(Jaw
@©ú[m aôoP²e ùNnVlThÓ CÚdÏm
(flame -hardened) C§p Jußd ùLôuß 90° operating) vÏìdLÞPu (Screws) ùTôÚjR
CûPùY°«p SôuÏ §\l×Ls (four openings) ERÜm.
CÚkÕ ‘_ô’þdLû[ AùNm©s (assemble) vÏì `ô@lh (screw shaft)
ùNnVÜm AYtû\ CVdLÜm ùNn¡\Õ.
vÏì `ô@lh (screw shaft) B]Õ ûa
@©eLo ©uv(finger pins) êXm EPtTÏ§«u
LôoTu v¼p (high carbon steel -Bp)
(body) ÑtßYhPj§p (periphery) SôuÏ vÏì
ùNnVlThÓ, L¥]lTÓjRlThÓ (hardened)
`ô@lhLs (screw shafts) ùTôÚjRl
TRlTÓjRlThÓ Utßm ¡ûWi¥e(ground)
Th¥ÚdÏm. CkR vÏìYô]Õ JÚ Nd¸
ùNnVlTh¥ÚdÏm. vÏì `ô@l¥u
(chuck key) êXm, ÑZt\l (rotate) ùNnVl
(úUtTÏ§«p) Nd¸ûV(chnck key) Ruàs
TÓ¡\Õ. ÏßdÏ ùYhÓj úRôt\j§p Htßd ùLôs[ (to accomodate) JÚ
aôúXôYôL (EsÇPtß) CÚdÏm (hollow in
vùLôVo vXôh (square slot/NÕWdLô¥)
cross - section) EPtTÏ§ (body) B]Õ ARu
RWlTh¥ÚdÏm EPtTÏ§«p JÚ CPÕûL
ØLl©p (face-p) NUA[Ü CûPùY°«hP NÕW UûW (left hand square thread)
YhP Yû[VeLû[ (equi-spaced circular rings)
ùYhPlTh¥ÚdÏm. vÏì `ô@¥u
ùLôiÓs[Õ. CûYLs Y¬ûNVôL SÓ®p(in the middle) JÚ ÏßLXô] (narrow) step
GiL°PlTh¥ÚdÏm. Number 1(Gi 1) CÚdÏm Utßm AÕ @©eLo ©uv êXm
SÓ®p(middle) ùRôPe¡ (start B¡)
(by means of finger pins) ©¥dLlThÓ CÚdÏm
ÑtßYhPjûR úSôd¡ (periphery) A§L¬dÏm (held). @©eLo ©uv (finger pins) vÏìdLû[d
(Increases towards periphery)
ÑZX (rotate TiQ) AàU§dÏm B]ôp
RôûPLs : (_ôv/Jaws) Øuú]\ AàU§dLôÕ.

RôûPLs (_ôv/Jaws) ûa LôoTu v¼Xôp
3 _ô Nd (3 Jaw check)

úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• 3 _ô Nd¡u (3þjaw chuck-u) TôLeL°u ùTVo áßRp
• JÚ 3 _ô Nd¡u (3þjaw chuckþu) LhPûUl× AmNeLû[ áßRp.
• 3-Jaw chuck Utßm four Jaw chuck t¡ûPúV Es[ úYßTôhûPd áßRp
• 3-Jaw chuck I ®P 4-Jaw chuck-u úUmThP ÏQeLs (merits) Utßm Ïû\Lû[d (demerits)
áßRp
• JÚ Nd þI (chuckþI) vùT³@ûT (specify) ùNnRp.

The 3 Jaw chuck / 3 _ô Nd) (Fig 1) Y¥Y/YhP Y¥Yl T¦lùTôÚhLs (only
perfectly round work) ApXÕ êu\ôp
JÚ 3 _ô Nd (3-Jaw chuck) B]Õ ù^p@l
YÏTÓYRôL Es[ (divisible by three) NUUôL
ùNuP¬e Nd (self centering chuck) Gußm
CûPùY°®hP RhûPVô] T¦l
A±VlTÓ¡\Õ. Es ®hPm Utßm ùY°
ùTôÚhLs UhÓúU 3-Jaw chuck - p ©¥dL
®hPeLû[l (Internal and external diameters)
©¥lTRtLôL ùTÚmTôXô] NdÏLs (chucks) Ø¥Ùm.
CWiÓ ùRôÏ§j RôûPLû[d (two sets of
Jaws) ùLôi¥ÚdÏm ªLf N¬Vô] EÚû[

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