WilTec HS-178 User manual

© by WilTec Wildanger Technik GmbH Seite 1
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Instructions for Use
Air Eraser HS-178
[Mini Abrasive Gun]
ARTICLE 34178
Read and follow the operating instructions and safety information before using for the first time.
Technical changes reserved!
Due to further developments illustrations, functioning steps and technical data can differ insignificantly.
Updating the documentation
If you have suggestions for improvement or have found any irregularities please contact us.

© by WilTec Wildanger Technik GmbH Seite 2
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Introduction
Thank you for purchasing this quality product. To minimize the risk of injury by means of fire or
electric shock we urge that our clients take some basic safety precautions when using this
device. Please read the operation instructions carefully and make sure you have understood its
content.
Safety guideline
BEWARE:
The device is not intended for use by persons (including children) with impaired or limited physical,
sensory and mental abilities or lack of experience and/or real knowledge, unless they are supervised
by a person responsible for their safety or you follow the instructions made by this person how to use
the device correctly.
Children should be supervised to make sure that they do not play with the device.
ATTENTION:
•Run a visual inspection of the device before every use. Do not use the device if the safety
appliances are damaged or worn out. Never override safety regulations.
•Use the device exclusively according to the intended purpose stated in the instructions for
use.
•You are responsible for the safety of the working environment.
•Never spray on food or chemicals with this gun.
•Never use wire or other hard objects to clean the nozzle or the needle; this may cause
damage.
•Never dip the whole gun in a solvent like paint thinner because this could ruin the air cap, the
paint nozzle or the needle.
SAFETY GUIDELINES:
•The user should choose the right compressor with the appropriate air volume and air pressure
to correspond to the actual work requirements.
•Always wear goggles. Under no circumstances should you direct the airflow towards your
body or other persons’ bodies.
•When you start working make sure that all the screws are tight.
Specification
Type: HS178 – Mini Abrasive Gun
Diameter: 0,5mm
Storage tank capacity: 15 ml
Uses:
The “Air Eraser” is a useful tool for removing colour defects or engraving surfaces. It is employed as a
hobby and professional tool for cleaning jewellery or very fine parts, for removing colour defects, glass
engraving. It is also used for lithographic work, for highlighting colour shades and correcting colour
errors without damaging or spreading the surface. It is widely used for model railways.

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Information for dentistry:
It is indispensable for the gold fillings’ final processing. By polishing surfaces like inlays and crowns is
posible to see small contacts between the opposite teeth without discrepancies of interdental
materials. The tarnished surface of the cast shows imprints of colour or carbon ribbon with superior
accuracy. After the correction the surfaces can be polished again and the process can be repeated
until reaching the desired result.
Use:
For universal work: Use clean, dry pressure air with 2 up to 2,8 bar. Water, oil and other impurities
should be removed from the pressure air using a corresponding filter if you want to reach a
satisfactory performance. After closing the blasting abrasive more air flow will leak from the conduction
path. This comes from the remaining air pressure in the cup.
1. Connect the air hose to the filter housing.
2. Unscrew the lid.
3. Fill the cup with abrasive material up to ¾, screw tight the lid.
4. To avoid leaks make sure that the abrasive material does not reach the edge of the cup.
5. To work on paper adjust the air pressure to 2 bar. If you work on metal, gold fillings, plastic or
glass regulate the air pressure to 3,1 up to 4, 7 bar.
6. Hold the Air Eraser as if you were holding a pencil. Move the Air Eraser with the tip about 3 up to
12 mm over the working surface. Change the distance according to the desired result.
7. Set the adjusting knob to a low amount of abrasive material to avoid unnecessary consumption.
8. To work fast use hard abrasive material and high air pressure. Get the abrasive tip closer to the
working surface to work faster. Keep a minimum distance to allow the air/blasting agent mixture
and the jet spreading.
Compressors:
The compressors 189 and 196 can be used with the HS-178 Air Eraser up to 40 psi.
1.Nozzle 10. Handle
2. O-Ring 11. Screw
3. Cup 12. O-Ring
4. Sealing 13. Valve body
5. Cup lid 14. O-Ring
6. Spring 15. Valve piston
7. Screw 16. Spring
8. Finger button 17. Female screw
9. Body