Mestra R-080150 Manual De Instrucciones página 6

The R-080150/R080160 is a simple electro-polisher especially designed to polish and grind small
items in the fields of jewellery and dental mechanics. It is supplied with the following accessories:
- 1 right-hand thread brush holder (B)
- 1 left-hand thread grinding wheel holder (C)
As an option, a cutter holder (F) (MESTRA catalogue ref. R-080190) can also be fitted, for cutters with
2.35 mm shafts. Left-hand and right-hand brush holders are also available.
FITTING THE BRUSH TO THE BRUSH HOLDER
For the brush to be properly gripped in the brush-holder (B), proceed as follows:
1. Choose an appropriate brush-holder. If you are facing the ON switch and wish to fit the brush-holder
on the right-hand end of the motor shaft, select a right-hand (clockwise) thread brush-holder, so that
the friction torque produced when the unit is used will help tighten the brush-holder. If you wish to fit it
to the left-hand end of the shaft, select a left-hand (anti-clockwise) thread brush-holder.
2. Attach the threadless part of the brush-holder to a bench vise.
3. Insert the brush into the brush-holder, ensuring that the brush-holder shaft is perpendicular to the
plane of the brush.
4. Screw the brush onto the brush-holder as tightly as possible by hand.
5. Take the brush/brush-holder assembly out of the bench vise.
6. Visually check that the brush-holder shaft is perpendicular to the plane of the brush by spinning the
assembly in your hand.
FITTING GRINDING-WHEELS TO THE WHEEL-HOLDER
1. Select the grinding-wheel-holder (C) and take the wheel attachment screw off the end.
2. Attach the other end of the wheel-holder to a bench vise.
3. Fit the wheel to the wheel-holder.
4. Secure the wheel to the wheel-holder by tightening the wheel fixing screw with a metric size 10 fixed
wrench.
5. Take the wheel/wheel-holder out of the bench vise.
6. Visually check that the wheel-holder shaft is perpendicular to the plane of the wheel by spinning the
assembly in your hands.
FITTING THE BRUSH-HOLDER AND WHEEL-HOLDER TO THE SHAFT ON THE UNIT
1. Fit the end of the wheel-holder or brush-holder with the hole on the end of the motor shaft and push it
in firmly by hand.
2. Tap the opposite end of the wheel-holder or brush-holder with a nylon mallet until it is properly fitted.
3. Turn the motor shaft by hand and visually check that the wheel or brush is perpendicular to the axis of
rotation. Also check that the motor shaft is properly lined up with the wheel-holder or brush-holder
shaft.
4. Start up the unit: the spin of the motor will reveal whether the wheel or brush is off line. If there is
more than 2 mm of slip, dismount and re-fit the wheel-holder or brush-holder.
5. Remember that the friction torque produced during work after a brush is fitted to the brush-holder will
keep it tight. This effect can be favoured by a suitable workpiece attack angle.
GB