Southbend SB1224 instruction sheet Disassembly, Inspection & Dressing, Cleaning, Reassembly

Model SB1224 I N S T R U C T I O N S Mfg. Since 1/11

Disassembly

1.Verify that registration marks have been made on the chuck and spindle. (Refer to Registration Marks section for details.)

2.Inspect the jaws and their slots to make sure they have matching numbers or marks. If none are found, stamp or scribe your own before continuing. (During re-assembly, jaws must be installed in the same slots.)

3.Use the chuck key to back out and remove the chuck jaws.

4.Unthread all chuck fasteners and separate the chuck halves, then remove the remaining chuck components to completely disassemble the chuck (see below).

Rear	Pinion
Chuck Body	and
and Fasteners	Retaining Pin

Scroll Gear

Note: Some Features &	Front
Fasteners are Excluded
for Clarity	Chuck Body

Figure 11. Chuck components.

Inspection & Dressing

Inspect all components carefully for burrs, wear, scoring, bent parts, cracks, and thread damage.

Carefully inspect the chuck jaw clamping surface for tapered wear from front to back. For minor wear, jaw regrinding may be more economical than jaw replacement. If the taper is heavy,

or grip, or work holding accuracy is a problem, chuck replacement is likely required.

Burrs, dings, flakes, high spots, or galled surfaces can usually be removed by lightly dressing them away with diamond lapping boards or honing stones with lapping oil. Be sure not to change part dimensions while dressing surfaces. Thread damage can usually be corrected with files and thread chasing tools.

If any parts are overly worn, bent, cracked, or otherwise damaged, they must be replaced (if available). Never attempt to repair chuck components by welding them. If damaged parts are unavailable, replace the chuck. Continuing to use a chuck with damaged components will increase the risk of accidental death or serious injury. Do not risk it!

If replacing fasteners, make sure to use the same hardness or grade as the original fasteners that were installed on the chuck.

Cleaning

When cleaning chuck components, make sure to remove all grease, sludge, and metal particles using a brush and clear-type mineral spirits or standard paint thinner. Avoid using white- colored mineral spirits, acetone, brake parts cleaner, gasoline, or acids. If an incorrect solvent is used, stains, additives, acids, or contaminants can be left behind as a corrosive coating. After cleaning and drying parts, be sure to wipe down parts with an oiled rag to prevent rust.

Light rust can be removed in a blast cabinet with soda blasting media. For heavy rust, have the chuck components “hot tanked” at a local automotive machine shop (remove all non-ferrous items first or they may dissolve).

Reassembly

Brush all internal chuck components with a generous coat of chuck grease, but do not pack the chuck full of grease. Re-assemble components in the reverse order of disassembly. Make sure to follow the Chuck Jaw Installation instructions to ensure that the jaws are installed correctly.

Make sure you only use approved chuck lubricants. Some lubricants can stain your chuck or have unintended reactions with cutting fluid, which will destroy their ability to properly lubricate the chuck.

To avoid stripping threads or cracking a casting, never use fasteners to draw components together and avoid using impact tools. Instead, be patient and properly seat the mating parts, then use hand tools and a recently calibrated torque wrench to tighten fasteners.

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