Smithy Midas 1220 LTD - Manual (Page 54)

Figure 10.22 Collet attachments are best for small-diameter work.
• They are housed within the spindle nose for maximum tool clearance, making it
possible to machine, thread, or cut off close to the spindle.
While chucks are universal tools that hold a range of stock sizes and shapes, collets are
special tools. There is a collet for every size and shape of workpiece.
Made with extreme accuracy, hardened, and ground, standard split collets are slotted so
their jaw ends compress inwardly to grip the workpiece. This is done by pulling the
collet jaw's externally tapered shoulder into a matching taper-bored adapter sleeve. The
adapter sleeve connects the lathe spindles MT5 taper to the collets MT3 taper. A drawbar
holds the collet in place.
Toolpost Grinders
A fully equipped lathe has a toolpost grinder, a small, independently operated grinding
head with an integral electric motor that mounts as a unit in the toolpost T-slot of the
compound rest. (For lighter work, some are held in the toolpost.) You can maneuver it as
you would any other cutting tool.
Toolpost grinders come with wheels of different shapes, sizes, and grits for grinding
different materials and surfaces. They also come with arbors and mounted wheels for
grinding internal surfaces. You can use them to grind or polish surfaces; to grind lathe
centers, arbors, taper sockets, leader pins, gauges, valve seats, and other close-fitting
parts; and to sharpen tools.
Midas 1220 LTD Operator’s Manual
10-11
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