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5. ASSEMBLY
Note: Figures are illustrative and may differ in detail from your drill.
5.1.
Assembly
5.1.1. Place the column assembly on the base, align holes and secure with the bolts and washers provided.
5.1.2. Install the table bracket onto the column together with the rack (fig.1), engaging gear in bracket with rack.
5.1.3. Install the rack collar and tighten firmly (fig.2).
5.1.4. Install the table adjusting handle (fig.2.A) and pivoted clamp bolt (the longer of the two - fig.2.B).
5.1.5. Tighten the handle set screw (with the hex. key provided) and the bracket clamp bolt.
5.1.6. Install the table and table pivoted clamp bolt (fig.3).
5.1.7. Carefully place the head assembly over the column and slide it into position. Align head with base.
5.1.8. Insert the two set screws in the right side of the head to lock it into position and tighten with hex. key (fig.4).
5.1.9. Screw the three feed handles and knobs to the hub of the pinion shaft (fig.5.A).
5.1.10. To install chuck open the chuck jaws completely by turning the chuck key counter-clockwise. Place a piece of wood on the drill table
(to prevent the chuck from getting damaged).
5.1.11. Insert thinner tapered end of arbor (fig.5.B) into drill spindle, fit chuck to protruding end of arbor and hold in place.
5.1.12. Turn feed handles to bring nose of chuck down onto wood (fig.5). Firmly pull on feed handle to seat arbor taper in spindle and chuck.
5.1.13. Loosen clamp screw on safety guard mounting collar, pass guard up over chuck and fit collar round flange of quill shaft. Ensure guard pivot
is central and tighten clamp screw (see fig.7).
5.2.
Drill mounting
5.2.1.
For stability and safety it is important that the drill base is securely bolted to the floor.
5.2.2.
Ensure that the mounting surface is capable of supporting the drill together with the weight of the heaviest likely workpiece.
fig. 2
6. OPERATING INSTRUCTIONS
p WARNING! Ensure the drill is unplugged from the mains power supply before commencing.
6.1.
Install drill bit
6.1.1.
Insert drill bit into chuck jaws to 1" (25mm) deep (avoid inserting small bits too far) and centre bit in chuck before tightening.
6.2.
Adjusting the table
5.2.1.
To adjust table up or down, loosen clamp bolt (fig.2.B) then turn bracket handle (fig.2.A). Once at correct height tighten clamp bolt (fig.2.B).
6.2.2.
To adjust table tilt, loosen the work table bolt (fig.2.C), adjust to the desired angle using the angle scale, then retighten.
6.2.3.
To turn the table around the column, loosen the rack collar slightly, then loosen the clamp bolt (fig.2.B).
Turn the table to the desired position then secure the clamp bolt and rack collar.
6.3.
Adjusting the speed
6.3.1.
Open the pulley case and loosen the belt tension lock screws (fig.6.A).
6.3.2.
Choose the speed for drilling operation (see drill speed chart) and move the belts to the correct
position for that speed, as shown on the chart inside the pulley cover.
6.4.
Belt tension
6.4.1.
With the belt tension lock screws (fig.6.A) loose and using hand pressure on the tensioning lever (fig.5.C),
set tension so that belts give is no more than 1/2" (13mm). Tighten lock screws.
Note that GDM250F has two lock screws, one each side of the head.
6.5.
Positioning the workpiece
6.5.1.
Use a piece of wood to rest the workpiece on. The drill bit may break through the workpiece and damage the table otherwise.
The wood should rest on the table so that one end of it is against the left side of the column. When the drill bit breaks through the
workpiece, it will contact the wood and cause it to spin. Resting the wood against the column will help prevent this.
6.5.2.
For small workpieces that cannot be clamped to the table, use a drill vice (not included). Vice must be clamped or bolted to table.
6.6.
Setting the drill depth
6.6.1.
Use the scale on the side of the drill head near the drill handle.
6.6.2.
Loosen locking screw (fig.5.D) and set the scale to the depth required. Tighten locking screw.
6.6.3.
When ready to drill, simply pull the feed handle. The drill will stop at the set depth.
fig. 3
fig. 4
fig. 1
fig. 5
fig. 6
GDM250F - 0016 - (2) - 111000
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