5
1. Headstock
The motor drives the spindle via an internal tooth belt. Spindle speed is continuously variable, and is regulated by the speed control knob (20)
located on the main control panel.
The spindle is provided with an internal No. 3 Morse taper (MT3) to accommodate a center, or for use with a face plate or turning clamp.
The 3-jaw self-centering chuck (3) is mounted on the spindle flange. To remove the chuck, remove the three securing nuts on the rear of the flange,
and pull it free together with the three mounting studs.
Three external jaws are also supplied to extend the capacity of the chuck. Their use and method of assembly is described under “Accessories,”
page 12.
The spindle has 6 holes drilled in its flange to accommodate a range of attachments, such as a face plate, 4-jaw chuck, etc. (see Accessories).
2. Running Gear
The running gear is protected by a cover (1), which is removed by unscrewing the two hex screws.
The gear train, shown in fig. 1, transmits drive to the lead screw. The lead screw acts as a worm, and,
to the carriage/saddle and consequently the cutting tool, thereby providing a power feed for thread
cutting or general turning operations. The rotational speed of the lead screw, and hence the rate of feed
of the cutting tool, is determined by the gear configuration. This is explained in greater detail under
“Screw Cutting”, page 9.
The drive to the lead screw may be disconnected by operating the lever on the rear of headstock.
The same lever is used to drive the lead screw in a forward or reverse direction (These actions
are described in detail under “Screw Cutting”), page 9.
3. Tailstock
The tailstock (8) may be moved along the bed to any desired
position and is secured by pushing down the handle on the
back of the tailstock. The tailstock spindle carries an internal
No. 2 Morse taper for use with the center provided. A
revolving live center and drill chuck are also available
from Micro-Mark. (See “Accessories.”)
The tailstock may be positioned up to 1/2" beyond the end
of the bedway to accommodate workpieces up to 16" long.
4. Carriage/Saddle
The carriage/saddle carries the cross-slide (6) onto which is mounted the compound slide (7) with tool post (5), allowing intricate and
delicate operations to be performed. It may be driven by the lead screw via the half nut to provide automatic feed when the auto feed lever (15),
mounted on the apron (16), is operated.
The position of the tool is effected by turning the cross-slide feed handle (18), which moves it across the lathe, and the carriage/saddle or manual
feed handle (19), which moves it longitudinally. Additionally, the compound slide feed handle (13) may be used to move the tool by small amounts
at right angles to the cross-slide. The slide may also be set at an angle to the cross-slide so that short tapers or bevels may be cut.
This is described in greater detail under “Bevel Cutting.”
The cross-slide and compound-slide feeds are provided with a dial graduated in 0.001” increments. As the feed handle is turned, the dial turns with
it to indicate the amount of movement. The scale on the cross-slide feed may also be rotated while the handle is held stationary, allowing the scale
to be “zeroed.” The manner in which this is put to use is discussed in greater detail under “Operation.”
The tool post carries 8 socket head cap screws which are used to secure a cutting tool in any desired position. Four tool bits may be mounted for
quick and easy changes. Two are shown mounted.
The tool post is rotated by slackening the lever on its top a sufficient amount so the post can be lifted slightly and then turned to the desired
position. There is a 90˚ stop pin under the tool post to aid in this indexing.
ALWAYS be sure the post, and hence the tool, is secure by tightening the lever firmly before attempting to cut.
5. Motor
Disassembly of the motor is not recommended. For servicing and repairs, please contact Micro-Mark at 908-464-1094.
1
1/2” max
