RB-212-3/RB-204
1. Put vacuum plate under the base plate (Fig. 7).
2. Check vacuum and hose connections, then switch on vacuum pump (Fig. 5,
6A).
3. The drilling machine should now be vacuum anchored. If machine does not
anchor, add weight by standing on vacuum base. It should anchor now with
vacuum gauge reading 20 inches of mercury minimum. If not, check the floor
and vacuum seals for leaks.
Note:
- It is not recommended to use vacuum anchoring for drilling holes 260mm and
more in reinforced concrete.
- Vacuum can be released by turning vacuum release valve (Fig. 6A).
Ceiling jack anchor method (Fig. 8)
1. For the RB-204, RB-208-3 and RB-212-3 fit the quick fixing device between the
ceiling and the ceiling jack on top of mast. Tighten ceiling jack screw to force
machine against floor. Stabilize and plumb machine by adjusting 4 leveling
screws.
2. For the RB-212-3 you also can fit the quick fixing device between the ceiling
and the top of the mast. Turn telescopic bar to force machine against floor.
Angle Drilling (RB-208-3, RB-212-3)
Anchor unit as described above. Secure mast at required angle and drill hole.
Note:
More care is required as the vibration will be higher when starting to drill at
an angle.
OPERATING INSTRUCTIONS
1. Thread the Drilling Bit (Fig. 2B) onto Drill Spindle (Fig. 2B/C) and
tighten securely with Bit Wrench.
Caution: Never turn Drill on with Bit resting on the concrete.
2.
Speed selection
(RB-208-3, RB-212-3)
Position 3-speed selector knob on drill to required speed.
RB-208-3 (Fig. 9)
RB-212-3 (Fig. 10)
Speed
Size
Speed
Size
0
0
320
102-200
250
122-300
800
62-100
750
72-120
1300
10-60
1250
10-70
Caution: Do not move speed selector while drill spindle is rotating.
Note: Water can be supplied by a standard garden hose or by a Pressure Tank.
Water is fed through Inlet Hose, down inside of Bit, washing cuttings from under
bit crown, up and outside of hole. Be sure that any method used has adequate
water pressure to supply a flow of 4-6 litres per minute. Lack of water can cause
diamonds to polish or burn the Bit causing Bit end turn blue.
3. With Drill Motor Switch in OFF position, plug Power Cord in.
4. Open Water Control Valve allowing water to flow at 4-6 litres per minute and
switch ON motor.
5. Apply load on Bit with light pressure on Feed Handle.
6. Drill Bit feed should be uniform without excessive force.
Overload Protection
If the bit is blocked a mechanical clutch will slip. If the clutch slips during normal
drilling have unit serviced by authorised RIDGID service centre.
If the red light (RB-208-3, RB-212-3) shows it means the motor is overloaded
and will begin to overheat. Reduce load until the red light goes out. If the motor
does overheat a thermal protection will operate. Switch off the machine and wait
for the motor to cool before starting (RB-204, RB-212-3).
MAINTENANCE INSTRUCTIONS
Warning: Make sure Machine is unplugged from power source before
making any adjustment.
Lubrication
Keep a light coating of oil on rack and pinion and Drill Spindle.
Ventilation
Keep Drill Motor inlet and air passage clear to assure proper Motor ventilation.
Motor Brush Replacement
Check Motor Brushes every 200 hours and replace when Brushes become
1/4 inch or less in length.
Machine storage
Motor driven equipment must be stored indoors or well covered in rainy weather.
Always remove Vacuum Seal from Base of Machine.
Bit Replacement
Bit is considered worn when the crown shows excessive wear and has become
flush with tube.
