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£_õ & Gm (CG & M) T«t£ 1.7.99 dLô] ùRôPo× LÚj§Vp
@©hPo (Fitter) - Po²e (Turning)

NdLs Utßm Nd¡e R²jR 4 _ô Nd (chucks and chucking - Indipendent of 4 Jaw
chuck)
úSôdLeLs: ClTôPj§u Ø¥®p ¿eLs ùT\ úYi¥V A±Ü §\uLs
• JÚ 4 Jaw chuckþu LhPûUl× AmNeLû[d áßRp
• JÚ 4 Jaw chuckþu TôLeL°u ùTVo áßRp.

4þ_ô Nd (Fig 1) eccentric BLúYô úRûYúLt\T¥ ÑZpYRtÏ
AûUÜ (set) ùNnV Ø¥Ùm.
4þ_ô Nd (4 Jaw chuck) B]Õ ÑRk§WUô]
Cu¥WTuPuh Nd Gußm AûZdLl CWiPôm Øû\ T¦l ùTôÚû[ set ùNnV,
TÓ¡\Õ. Hù]²p CRu JqùYôÚ JÚ PVp ùPvh Ci¥úLhPo (dial test
RôûPÙm R²jR²VôL Ah_vh (adjust) indicator) ER®Vôp (Puring) ùNnVXôm. ÑZt£
ùNnV Ø¥YRôp, T¦lùTôÚû[ 0.001” AfÑdÏ (axis of rotationþdÏ) JÚ úLôQUôL (at,
ApXÕ 0.02 ª.Á ÕpXõVj§tÏs hì (true) an, angle) T¦l ùTôÚs ©¥dLlTP®pûX
ùNnV Ø¥Ùm. GuTûR Eߧ ùNnV, T¦lùTôÚû[
chuckþu AÚLôûU«p ùNpYÕ ©u]o
Fig 1 Ae¡ÚkÕ GqY[Ü çWm A§XõÚkÕ
®X¡f ùNuß úNô§dLl T¦lùTôÚs
AàU§dÏúUô AÕYûW úNô§lTûR §ÚmT
KEY
KEY SOCKET §ÚmT úUtùLôs[ úYiÓm.
SQUARE JÚ eccentric T¦l ùTôÚû[ EtTj§ ùNnV,
THREAD SCREW
BODY T¦l ùTôÚû[ off-centre BL AûUÜ
FINGER PIN
ùNnVÜm Independent adjustment YN§
TAPER TO MATCH ùNn¡\Õ.
SPINDLE NOSE
REVERSIBLE
JAW
KEY WAY 4þ_ô Nd¡u TôLeL[ôY] (The parts of a 4 Jaw
chuck are)
þ úTd ©ú[h (Back plate)

þ EPtTϧ (Body)
þ _ôv (Jaws/RôûPLs)
CkR YûL Nd B]Õ self- ùNiP¬e NdþI
þ NÕW UûW«PlThP vÏìv (screw)
®P ªÏkR TXUô] LhPûUl×Pu
Y¥YûUdLl TÓ¡\Õ. Utßm ªÏkR úTd ©ú[h (Back plate)
©¥Uô] Nd§ (greater holding power) EûPVÕ. AùXu vÏì (allen screws) ER®ùLôiÓ úTd
JqùYôÚ RôûPÙm R²jR²VôL, JÚ square
©ú[h B]Õ EPtTϧ«u ©u×\m
thread screw-Bp, SLo¡\Õ. Utßm CÕ
CûQdLlTÓ¡\Õ. CÕ úLvh AVou /
©u×\UôLÜm SLojRXôm.
v¼p (cast iron /steel) ùLôiÓ
Independent 4 Jaw chuck B]Õ 4 RôûPLû[ RVô¬dLTlÓ¡\Õ. CRu Õû[ N¬YôL
(jaws) EûPVÕ. JqùYôÚ _ôÜm (jaw) (tapered BL) CÚkÕ v©i¥p úSô³u
Ut\Yt±p CÚkÕ R²VôL Nd bodyþ«p (spindle nose) taper EPu ùTôÚkÕ¡\Õ. C§p
Es[ ARtϬV vXôh¥p CVeÏ¡\Õ. JÚ ¸ úY (key way)
Utßm AÕ ARtÏj R²jR²VôL Es[
Es[Õ. AÕ v©i¥p úSô³p Es[ Key
square thread screw þBp actuated CVdL
EPu ùTôÚkÕ¡\Õ. Øu×\m JÚ step
RôûPLû[l (jaws) ùTôÚjRUô] adjustment
Es[Õ. ARuúUp UûW (thread)
ùNnÕ T¦l ùTôÚû[ true BLúYô ApXÕ
ùYhPlTÓ¡\Õ. v©i¥p úUp

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