Bedienungsanleitung Gude GTB 20 55194 (Seite 28 von 213) (Deutsch, Englisch, Holländisch, Französisch, Italienisch)

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9. Operation

Drilling Speeds

Factors influencing the drilling sped: type of material. drilled hole size. type of bit. required quality of cut.

Remember that the smaller the bit is the larger is the required speed. When drilling soft materials. higher

speed is required than that for the hard materials (see the table of drilling specifications).

Metal Drilling

Metal pieces need to be clamped safely. some of our vices are recommended. Never hold the piece just with

hands. The bit cutting edges may catch the piece and cause a serious injury to you. The bit will get broken

when a metal object strikes against the column. .

The piece to be drilled should be firmly clamped. Any tilting. twisting and shifting will result in a rough drilled

hole and the risk of breaking the bit will increase as well. If the metal object is flat. underlay it with a piece of

wood to prevent spinning. If the shape is irregular and its area cannot lie on the bench entirely. it should be

fixed.

Wood Drilling

It is possible to use the metal working bits for wood working as well. however. wood drilling bits should be

preferred. Do not use twist drills. those rotate so fast that they will lift the drilled piece from the bench and will

spin it around. To drill the material through. the bench has to be aligned for the bit to get in the centre hole.

When the bit starts cutting wood. the advance should add gradually to prevent the material from shattering.

Put a piece of waste wood under the worked material as a pad. It will help to reduce the shattering qualities

and protect the drill bit tip.

Advancement

Apply sufficient force on the advancement hand lever to press it down. interrupt the advancement now and

then to keep the chips short or to direct the sawdust from the hole being drilled. Too fast advancement could

result in the motor stopping. belt slipping. damaging the piece being drilled or breaking the bit. Too slow

advancement could heat the drilling bit and the piece being drilled could get burnt.

10. Maintenance

WARNING: SWITCH OVER TO “OFF” POSITION AND UNPLUG THE MACHINE BEFORE

MAINTENANCE OR LUBRICATION OF THE MACHINE FOR YOU TO BE SAFE.

Blow off or suck off any sawdust and chips gather on the motor. pulley housing. bench and the drilled piece

surface.

Wipe the gloss surface with an oiled cloth.

Apply a layer of pasty wax on the column and the bench to keep the surfaces clean with any spots of rust.

The ball bearings in the pinion and v-belt pulley assembly are lubricated for life and sealed permanently. Pull

the pinion down and lubricate with oil on a three-month basis.

If the bench clamping devices and locking knobs run heavily. lubricate them.

CAUTION: Any routine and scheduled maintenance of the drill should be done by an authorised

servicing technician.

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