ADJUSTMENTS & OPERATION
SPINDLE SPEED & CUTTING REFERENCE CHART
This Mini Milling/Drilling Machine comes with two variable speed ranges
(Low = 0-1100 RPM / High = 0-2500 RPM). It is very important to select the
correct RPM cutting speed for the different materials to cut and for personal
safety. To change speed range:
1. Stop machine before attempting to change the L/H speed selector lever (A)
Fig.12.
2. With machine stopped, pivot the L/H speed selector lever (A) to the desired
setting.
3. Turn the On/Variable Speed dial (B) Fig.7 clockwise to start the machine and
set desired speed.
Refer to Fig.13 for recommended spindle speeds for different materials to cut.
R8 SPINDLE TAPER AND R8 COLLET
This Mini Milling/Drilling Machine comes with an R8 spindle taper which accepts
R8 collets. Make sure the machine is diconnected from the power source before
attempting to adjust, remove or install taper/collet or chuck.
Installing 1/2” chuck on R8/JT#33 collet or optional cutting tool:
1. Clean the chuck and R8/JT#33 collet. Slide the chuck (A) Fig.14 onto supplied
R8/JT#33 collet (B), or slide optional cutting tool onto appropriate R8 collet
(depending on your cutting tool).
2. Slide cutting tool and collet assembly all the way into the R8 spindle taper.
3. Hold the cutting tool and collet assembly with one hand, and with the other
tighten the drawbar (A) Fig.15 using a wrench as shown. Do not overtighten
drawbar, it could damage the spindle taper and it will also be more difficult to
remove during removal.
Removing 1/2” chuck and R8/JT#33 collet or optional cutting tool:
1. Insert lock bar (B) Fig.15 into the small hole on the side of the head as shown.
Turn spindle taper by hand until the lock bar slides into the slot of the spindle
taper, this will prevent the spindle taper from turning.
2. Loosen the drawbar (A) with a wrench, do not loosen completely.
3. Hold the cutting tool and collet assembly with one hand, and with the other tap
the top of the drawbar with a mallet to dislodge the R8 collet.
4. Completely undo the drawbar and remove the cutting tool and collet
assembly.
FIGURE 12
FIGURE 13
FIGURE 14
Recommended Cutting Speeds
Workpiece Material Cutting Speed
Aluminum & alloys 300
Brass & Bronze 150
Copper 100
Cast Iron, soft 80
Cast Iron, hard 50
Mild Steel 90
Cast Steel 80
Alloy Steel, hard 40
Tool Steel 50
Stainless Steel 60
Titanium 50
Plastics 300-800
Wood 300-500
FIGURE 15
