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INSTRUCTIONS & PARTS LIST
20C DEAD-LENGTH
Spring Retainer
Nut
Stop Rod
Coil Spring
MAIN INSTRUCTIONS
•
Clean the Lathe Spindle , Draw
Tube, and the parts of the 20C
Dead-Length Step Chuck
•
Set the face of the Stop Rod 1-1/8"
from the face of the Stop Body. Secure with
the 1-1/4" Hex Nut. (This Dimension may
already be set from the factory.)
•
Thread the Stop Rod/Body Sub-
Assembly into the Dead-Length
Step Chuck and tighten securely.
• Hold 1-1/4" Hex Nut of theStop Rod Sub- Assem-
bly in a vise and tighten D.L. Step Chuck using a
20C Inner Collet Spanner Wrench and turning clock-wise.
CAUTION: Do Not grip any part of the Step Chuck body in the
vise. The Step Chuck may be permanently distorted or break.
•
Coat the external bearing diameter of the Dead-Length
Step Chuck, the internal bearing diameter and collet head
angle of the Outer Collet with Molybdenum Disulfide grease (Moly-Lub). This
will insure maximum life of the mating parts.
•
Thread the Spring Retainer into the
Outer Collet and firmly tighten.
(
Hold the Collet with the 20C Collet Wrench [ Part No.
CL-0011759-A] and use a 1-1/4" open end wrench to tighten the
)
Spring Retainer.
© Hardinge Inc. 1996
D.L. Step Chuck
Outer Collet
Nut
Belleville Springs (2)
Stop Body
®
STEP CHUCK
Stop
Rod
Drive Pin
2 ea. 1-1/4 Open End Wrenches
1 ea. 20C Collet Wrench
1-1/8"
1 ea. Machinist Vise
1 ea. Moly-Lub Grease
N u
t
S t o
p
R o
d
1 - 1
/ 8 "
O u
t e r
C o
l l e
t
B -0009500-
TOOLS NEEDED
QUICK START
Quick Start instructions quickly guide
you through the procedure. Read the
main instructions first to thoroughly un-
derstand how to use the product.
• Clean parts & headstock
spindle
• Set face of Stop Rod 1-1/8"
from Stop Body face & secure
• Thread & Secure Stop Rod-
Body Assembly into D.L. Step
Chuck
• Coat Bearing surfaces with
Molybdenum Disulfide grease
• Assemble and secure Spring
Retainer into Outer Collet
• Insert D.L. Step Chuck-Stop
Assembly into Outer Collet
Aligning Pin with slot in Outer
Collet Face
• Slide Belleville Washer
Springs on Stop Rod
• Slide on the Coil Spring &
lock finger tight with the Nut,
fully compressing coil spring,
then back off one full turn
0067
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Summary of Contents for Hardinge 20C
- Page 1 Thread the Spring Retainer into the Outer Collet and firmly tighten. t e r Hold the Collet with the 20C Collet Wrench [ Part No. l l e CL-0011759-A] and use a 1-1/4" open end wrench to tighten the Spring Retainer.
- Page 2 MAIN INSTRUCTIONS (Continued) & S t o p • Insert Dead Length Step Chuck & Stop Sub-Assembly S t e b - A into the Outer Collet & Spring Retainer Sub-Assembly. b l y Align the Drive Pin in the Step l e v (shown on front page, 1st Figure) i l l e...
- Page 3 BORING OUT (Continued) • Draw the assembly into the spindle by adjusting the collet closer draw tube until the back face of the Step Chuck just contacts the face of the spindle. A very noticeable increase in resistance will be felt at this point. •...
-
Page 4: Parts List
800-843-8801 • Canada : 800-468-5946 • Phone: 607-734-2281 • FAX: 607-734-3886 Form No. B-67A Litho in U.S.A. Part No. BA -0009500-0067 April 1996 All specifications are subject to change without notice. All marks indicated by ® and ™ are trademarks of Hardinge Brothers, Inc.