Smithy Midas 1220 LTD User Manual
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3. Compound Rest.
Mounted on the cross slide, the compound rest swivels to any angle
horizontal to the lathe axis to produce bevels and tapers. Cutting tools fasten to a
toolpost on the compound rest. The calibration on the front of the base are numbered in
degrees from 60 right to 60 left.
4. Cross Slide.
The T-slotted cross slide moves crosswise 90 degrees to the lathe axis by
manual turning of the cross feed screw hand wheel. It also serves as the milling table.
5. Drill Press and Fine Feed Clutch.
Pushing in the drill press clutch (engages the fine
feed). To work the clutch, release the spring tension by rotating the drill press handles
clockwise. Pull the clutch out to sue it as a drill press or push it in to use the fine feed.
Use the fine fee hand wheel to move the quill up and down.
6. Forward/OFF/Reverse Switch.
This is the main switch used to operate the lathe. It is
simply a forward/reverse switch for the motor. The motor turns counterclockwise for
normal lathe operation and clockwise for normal milling and drilling operation. The
MI-1220 LTD has two switches, one located on the millhead and one on the right side of
the gearbox.
7. Gearbox.
The gearbox houses the belts that derive the spindle and change gears for
the powerfeed. Select the thread pitch (for threading) or the feed rate (for turning) by
changing the four change gears on the right side of the gearbox.
8. Headstock.
The headstock, which is secured to the bed, houses the gears the drive
the powerfeed and the taper that secure the lathe spindle.
9. Lathe Spindle.
The end of the lathe spindle facing the tailstock is the spindle nose. The
spindle nose, which has an MT4 taper, rotates the work piece and drives the lathe chicks
and other workholding devices. All attachments (like three-jaw chucks, four-jaw chucks,
faceplates, etc.) bolt to the spindle flange either directly or via an adapter plate.
10. Leadscrew.
The leadscrew, which runs the length of the bed, moves the carriage for
lathe turning or thread cutting. It works both manually and under power. You can also
use it manually with the mill.
11. Locks.
Locks on the cross slide, carriage, quill, and tailstock (two) keep them from
moving. During machining, lock all axes except the one you want to move.
12. Micrometer Control and Calibration.
Just inside the handles of the tailstock
crossfeed, drill calibrated in millimeters. The compound feed and crossfeed are
calibrated in two thousandths, the tailstock in thousandths, the leadscrew in two
thousandths, and the drill press in forty thousandths.
Note:
These micrometer dial collars can move independently around the handle shafts.
This independent motion is called float. The MI-1220 LTD has floating dials on the cross
slide, tailstock, longitudinal and mill feeds. They let you zero the collars at any point and
read the feed travel from that point on the dial for increased accuracy.
13. Mill Spindle.
The mill spindle attaches to the quill, which moves in and out of the
head. The quill lock keeps the quill still when you install or remove tools from it and while
milling horizontally. Usually, tools fir into collets that attach through the spindle via
drawbars.
Midas 1220 LTD Operator’s Manual
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