Smithy Midas 1220 LTD - Manual (Page 32)

• The means to hold the cutting point tight
• The means to regulate operating speed
• The means to feed the tool into or across, or into and across, the work, either
manually or by engine power, under precise control
• The means to maintain a predetermined ratio between the rates of rotating
works and the travel of the cutting point or points.
Gear ratios
The lathe lets you use various indicated gear combinations to cut the desired number of
threads per inch (TPI), or the metric equivalent, or to advance the tool a specified amount
each revolution (feed rate expressed as inches per revolution [ipr]).
The MI-1220 LTD has pick-gear gearboxes; gears are picked and placed to change the
gear ratios. The gearbox mechanism determines the leadscrews rotation rate in relation
to the spindles for threading, turning, and facing. To change the feed rate, replace the
gears per Figure 6.2.
Figure 6.2 (missing)
Midas 1220 LTD Operator’s Manual
6-3
For Assistance: Call Toll Free 1-800-476-4849