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 7⁄16" diameter mounting holes completely through the back plate.
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
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.
•Secure Clamping: A thrown workpiece may cause severe injury or even death. When swapping the chuck jaw positions, use a torque wrench to
•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.
•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.
