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5.4 Installation and change of the drilling bit
The radial drill is mainly used in drilling. How to clamp the drilling bit is therefore very
important. Generally, drilling bits divides into two kinds, one is straight handle drilling bit,
and another is tapered handle one. (as fig. A). Their clamping is very different. The straight
handle one is fixed by a drilling head while the tapered handle one is fixed by a bushing.
5.4.1 The assembly and disassembly of the drilling head and clamp
Fig. a. Fig. b. Fig. c. Fig. d.
No. Term No. Term
(1) Revolving shaft. (5) Pin for releasing drill bit
(2) Shaft bushing (6) Drill shaft end
(3) Speedy drill bit clamp (7) Drilling shaft
(4) The stem for the speedy drill bit clamp
Disassemble the tapered handle drill bit and the drill head clamp as the following way:
a. Move away the drilling bit or lift the gearbox to the utmost point.
b. Power off machine.
c. Put on gloves.
d. Insert a thick wood plate into the underneath of the drill bit and the drill bit head.
e. Rotate the feed trip lever clockwise and have the spindle descend about 150 to 200 mm. As fig. a.
f. Rotate the revolving shaft from the bushing till that the drill shaft end and drill shaft are visible
from the hole of releasing drill bit. as fig. b.
g. Insert the pin for releasing the drill bit into the hole, as fig. c.
h. Hit the end of the pin for releasing drill bit, using plastic hammer or copper bar, till the drill bit
and the drill bit clamp fall onto the wood plate.
Precaution：
The distance between the thick wood plate, drill bit and the end of the drill bit clamp is about 30 mm.
Please dismantle the drill bit the following way when the bit releasing devise of the TPR-1600H cannot work.
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