Instruction Sheet, Specifications | Southbend SB1231 instruction

MODEL SB1231

12" 4-JAW INDEPENDENT CHUCK

Instruction Sheet

PHONE: (360) 734-1540 • www.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.

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

#CR13310 Printed in Taiwan