Southbend SB1313 User Manual

Instruction Sheet

Model SB1313

High Precision 6" Lathe Chuck

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 Range ...0.32"-6.30" (8-160mm)

• ID Clamping Range ..2.17"-5.90" (55-150mm)

• Outer Diameter ........................6.57" (167mm)

• Maximum Chuck Key Torque .........58 ft/lbs*

• Maximum Jaw Gripping Force ....... 4721 lbs*

• Maximum Speed .............................2000 RPM

• Two-Piece Hardened Steel Jaws ............... Yes

• Plain Back Mounting .................................Yes

• Jaw Mounting Cap Screw Torque ......29 ft/lbs

• Grease Fitting Lubricated .........................Yes

• Cast-Iron Construction ..............................Yes

• Chuck Weight ......................................... 20 lbs

• Origin ................................................... Taiwan

* Maximum handle torque and gripping force

is given at full jaw and scroll gear engagement. If jaw and scroll gear are partially engaged, clamping force and gripping force is reduced.

Four hardened steel jaws for durability and extreme clamping force and grip

Designed for

up to

2000 RPM

Universal plain-back mounting

Figure 1. Features.

Grease fitting for

complete internal

lubrication

Two-piece

jaws for speedy

internal/external

clamping changes

Manufactured

with high-tech

German CNC

machinery

Installation

1. DISCONNECT LATHE FROM POWER!

2. Mount the back plate on the spindle.

3. Accurately measure the inside of the back

relief bore on the chuck. This dimension is critical and should be ± 0.001''.

4. Face and true the diameter of the back plate. Make passes across the face until the entire surface has been cut.

If you need help with your new item, contact

us at: (360) 734-1540 • FAX: (360) 676-1075

5. Turn a shoulder into the face

0.001" to 0.002'' larger than the back relief bore diameter. Remember that this is a press ﬁt. Chamfer the corner a small amount to prevent any burrs when installing.

⁄8'' deep and

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6. While the back plate is still installed in the lathe, scribe a 147mm diameter centerline in the face of the back plate. This centerline is for the chuck mounting bolt holes.

7. Along the circumference of the centerline just scribed, mark and center punch the three mounting bolt hole locations 120° apart.

8. Remove the back plate from the lathe and drill three completely through the back plate.

⁄16" diameter mounting holes

Operation and Safety

• Chuck Key Safety: A chuck key left in the

chuck can become a dangerous projectile when the spindle is started. Always remove the chuck key after using it. Develop a habit of not taking your hand off of a chuck key unless it is away from the machine.

Disconnect Power: Disconnect the lathe

•

from power before installing and removing the chuck or doing any maintenance or adjustments. Accidental lathe startup can cause severe injury or death.

9. Clean and stone all mating surfaces until they are perfectly clean and no burrs exist.

10. Place the chuck in an oven, and then set the oven to the warm setting. When the oven reaches approximately 100° F, turn the oven off and let the chuck sit in the oven for 30 minutes.

11. Place the back plate into a freezer for 30 minutes.

12. Put on insulated leather gloves and place the chuck on the back plate. Line up the mounting holes and install the three supplied hex bolts ﬁnger tight.

13. Install the back plate and chuck onto the lathe.

14. Working in an alternating pattern, tighten the M10-1.5 chuck mounting hex bolts until you reach a ﬁnal torque of 30 ft/lbs. Alternating the tightening process avoids chuck warpage.

Secure Clamping: A thrown workpiece may

•

cause severe injury or even death. When swapping the chuck jaw positions, use a torque wrench to re-torque the M8-1.25 jaw mounting cap screws to 29 ft/lbs. When clamping a workpiece, maximum gripping force is attained at full jaw and scroll gear engagement. If the jaw and scroll gear are partially engaged, clamping force is reduced.

Chuck Speed Rating: Exceeding the

•

maximum rated speed indicated on the chuck, or using excessive spindle speeds with an unbalanced workpiece, can cause the workpiece to be thrown from the chuck causing a severe impact injury or even death. Always use the appropriate spindle speed for the job.

Large Chucks: Large chucks are very

•

heavy and difficult to grasp, which can lead to crushed fingers or hands if mishandled. Get assistance when installing or removing large chucks to reduce this risk. Protect your hands and the precision ground ways by using a chuck cradle or piece of plywood over the ways of the lathe when servicing chucks.

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Safe Clearances: Often chuck jaws will

•

protrude past the diameter of the chuck and can contact a coolant nozzle, tooling, tool post, or nearby components. Before starting the spindle, make sure the workpiece and the chuck jaws have adequate clearance by rotating the spindle through its entire range of motion by hand.

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