MODEL SB1231

12" 4-JAW INDEPENDENT CHUCK

Instruction Sheet

PHONE: (360) 734-1540www.southbendlathe.com

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.

Hardened steel jaws

Independent jaw

for durability and

screws for each

extreme clamping

reversible jaw

force and grip

 

Direct

 

camlock

 

spindle

 

mounting

 

Jaw screw

 

retaining pin

Manufactured

with lock screws

with high-tech

 

German CNC

 

machinery

 

Fine-grain cast

 

iron body

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.

Copyright © October, 2010 by South Bend Lathe Co.

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

#CR13310 Printed in Taiwan

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Southbend SB1231 specifications Instruction Sheet, Specifications, Introduction