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Instruction Sheet
PHONE: (360) 734-1540 • www.southbendlathe.com
MODEL SB1224
12" 3-JAW SCROLL CHUCK
Copyright © April, 2011 by South Bend Lathe Co.
WARNING: No portion of this manual may be reproduced without written approval.
#CR13937 Printed in Taiwan
Mounting Type ......... Direct Mount D1-8 Camlock
Chuck Outer Diameter ...................12.2" (310mm)
Chuck Bore Diameter .....................4.05" (103mm)
OD Clamping Range ...... 0.12"–4.65" (15 –300mm)
ID Clamping Range ....... 1.78"–4.61" (90–290mm)
Static Clamping Force .............................. 9890 lbs
Maximum Chuck Key Torque .................137 ft/lbs
*Maximum Speed .................................. 1800 RPM
Chuck Jaw M12 Cap Screw Torque .......78.8 ft/lbs
Rear Chuck M12 Cap Screw Torque ......78.8 ft/lbs
Chuck Weight .............................................. 105 lbs
Country of Origin ....................................... Taiwan
* Even if a tailstock and steady rest are used,
the maximum speed rating may not be
SAFELY reached with certain workpieces.
The workpiece must be balanced and
appropriately sized for the chuck and lathe,
and the chuck must be properly maintained
to achieve maximum clamping force. As
spindle speeds increase, centrifugal force
also increases. If centrifugal force becomes
too great, the workpiece can be thrown from
the chuck with deadly force. Always use good
judgment with each setup!
Specifications
Introduction
Incorrect use of this tool
can result in death or
serious injury. For your
own safety, read and
understand this entire
document before using.
This chuck uses a direct-mount camlock system
to attach to the spindle. Direct-mount chucks
provide a number of advantages over chucks that
require a back plate for mounting.
The main benefit is a larger maximum working
area between the chuck jaws and tailstock. The
increased space is created by the absence of a
back plate between the chuck and spindle.
Another benefit is that direct-mount chucks
require less initial setup time because the
machinist is not required to machine a back plate
to fit the chuck.
Figure 1. Main features of this chuck.
Threaded
Pinion
Retaining
Pins
Direct
Mount
Back
Camlock
Studs
Reversible Top Jaws
Two-Piece Jaws
Two-Piece
Center
Split
Chuck
Rear
Chuck Cap
Screws