Southbend SB1231 User Manual

Specifications, Instruction sheet, Introduction

Chucks are heavy! Get assistance when

installing or removing the chuck from the

lathe. Wear heavy duty leather boots for

foot and toe protection, and keep hands and

fingers away from all pinch points. Ignoring

this warning can lead to a severe crushing

injury or finger amputation!

Specifications

• OD Clamping ...... 0.69"–10.04" (17.5–255mm)

• ID Clamping .......... 3.74"–10.83" (95–275mm)

• Chuck Bore Diameter ................2.56" (65mm)

• Chuck Outer Diameter ..........11.81" (300mm)

• Maximum Speed ...........................2500 RPM*

• Mounting Type ......................... D1-8 Camlock

• Construction ..................Fine-Grain Cast-Iron

• Chuck Weight ......................................... 80 lbs

• Chuck Shipping Weight ......................... 85 lbs

• Country of Origin ................................ Taiwan

* The maximum speed listed above is ONLY

possible with the chuck jaws and the

workpiece in complete rotational symmetry.

The workpiece weight must be within the

limits of the lathe, and the workpiece mass

must be of equal density throughout to

prevent centrifugal imbalance or radial

runout—even if a tailstock or other support

is used for additional support.

Instruction Sheet

PHONE: (360) 734-1540 •

www.southbendlathe.com

MODEL SB1231

12" 4-JAW INDEPENDENT CHUCK

WARNING: No portion of this manual may be reproduced without written approval.

#CR13310 Printed in Taiwan

Figure 1. Features.

Introduction

The Model SB1231 uses a direct mount D1-8

camlock system where the camlock studs are

directly threaded into to the chuck body instead

of being threaded into a backing plate that

is bolted to the chuck. Without using a back

plate to mount the chuck, the chuck jaws are

positioned closer to the headstock which gives

a longer distance between the jaws and the

tailstock. Another benefit is that the distance

between the jaws and the outboard spindle nose

is reduced, so if a spider support is used on the

outboard spindle, short gun barrels and other

shorter workpieces can be held at both ends.

Manufactured

with high-tech

German CNC

machinery

Fine-grain cast

iron body

Hardened steel jaws

for durability and

extreme clamping

force and grip

Independent jaw

screws for each

reversible jaw

Direct

camlock

spindle

mounting

Jaw screw

retaining pin

with lock screws