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Frequently Asked Questions (FAQ)

These are the most frequently asked questions by our customers.
Please contact us for further queries.

1. WHERE ARE MACROZA WALL CHASERS MANUFACTURED?

MACROZA wall chasers are manufactured in Spain (EU), with top quality materials, made to last under the harsh working conditions at construction sites.

MACROZA wall chasers are manufactured in accordance with all European Directives.

With over 50 years experience as chasing specialists we strive to manufacture the highest quality Wall Chasing machines on the market.

2. HOW MANY MACROZA WALL CHASER MODELS ARE AVAILABLE?

Currently we have 3 new models of milling cutter wall chasers: MACROZA M80, MACROZA M95 and MACROZA SC200.

These three models replace the former MACROZA M90 and MACROZA SC100.

MACROZA M80 comes with a powerful 2,000 W motor and is the ideal tool for softer materials such as hollow clay bricks and AAC/ Ytong blocks.

MACROZA M95 comes with a more powerful 2,400 W motor and aimed at harder materials such as solid clay bricks or cement blocks.

MACROZA SC200 comes with an all powerful 2,800 W motor designed to work on harder and more abrasive materials such as overcooked clay bricks or hard cement blocks.

M95 and SC200 come also with the option of attaching a dust collection device if necessary.

Lastly, SC200 is the only MACROZA Wall Chaser able to work with our bigger milling cutter, RZ/D 150 opening 50mm wide X 50 mm deep.

We have also developed a double diamond blade Wall Chaser MACROZA Diamant D2 specifically designed to cut the hardest materials such as concrete and stone.

3. ON WHICH MATERIALS CAN I USE MACROZA’S MILLING CUTTER WALL CHASERS?

MACROZA wall chasers are the world’s most powerful milling cutter wall chasers. This allows them work on all different sorts of materials except concrete and stone.

They can work on the following surfaces:
- Hollow & solid clay brick
- Cement block
- Plaster walls
- Mortar rendering walls
- AAC / Ytong blocks

For extremely hard materials such as concrete and stone we recommend our double diamond blade MACROZA Diamant 2 wall chaser.

4. WHAT ARE THE DIFFERENCES BETWEEN MILLING CUTTER WALL CHASERS AND DOUBLE DIAMOND BLADE ONES?

- Double diamond blade wall chasers work at a much slower pace than the milling cutter ones. Productivity per day is then much less.

- Double diamond blade wall chasers work by cutting two parallel grooves leaving the centre intact. This centre is then chiselled out by hand or hammers. MACROZA cutting system is one step only job.

- Due to the high speed of the blades, double diamond blade wall chasers produce lots of dust which makes it necessary to work with dust collection.

Milling cutter wall chasers don’t need to work with a vacuum system.

- Double diamond blade wall chasers leave at least a 10 cm gap in corners and ceilings. MACROZA milling cutter chasers leaves only 1 cm gap.

- Double diamond blade wall chasers cannot open round chases. With MACROZA Milling cutter chasers you can open round chases if required.

- With double diamond blade wall chasers the weight is supported by the operator. MACROZA Milling cutter chasers are the only machines that work with the cutter being supported by the wall. The machine’s weight is not borne by the operator, but by the wall itself.

5. HOW DO I WORK WITH MACROZA MILLING CUTTER WALL CHASERS?

It is of extreme importance the machine is being held in the right way. Otherwise, it will not have enough support points and will not be inserted properly into the wall. Cuts will not be clean and the machine might vibrate and bounce back from the wall being dangerous to the operator.

For the proper way of holding the wall chasers please refer to the instruction booklet and sections on this website.

6. WHAT ARE THE CHASE SIZES AVAILABLE?

The cutting device is a milling cutter made of Tungsten Carbide tips brazed to the cutter.

Currently there are 7 different milling cutter sizes to suit different job applications and cutting requirements.

For all MACROZA Wall Chasers

Milling Cutters Size (width x depth)
RZ 10 25 mm x 25 mm
RZ 105 30 mm x 30 mm
RZ 11 25 mm x 35 mm
RZ 12 15 mm x 45 mm

For MACROZA M95 y SC200 only

Milling Cutters Size (width x depth)
RZ 115 35 mm x 35 mm
RZ 125 40 mm x 40 mm

Only for MACROZA SC200

Milling Cutters Size (width x depth)
RZ 150 50 mm x 50 mm

No all cutter sizes are available for all models. We will employ different model depending on the job requirements .

It is possible to open wider chases by running two parallel chases next to one another.

7. THE MACHINE HITS THE MATERIAL, BUT IT DOES NOT CUT. WHY?

Most probably the milling cutter is not sharpened. It is very important to keep the Tungsten Carbide plates well sharpened at all times. This will ensure perfect cutting.

A blunt milling cutter disc will not cut, but hit the material producing vibrations that might be transmitted to bearings, pinion and motor.

Sharpening it is a simple two-stage operation.

Firstly, check whether the teeth need to be sharpened. To do this we use the MACROZA’s sharpness tester. If there’s gap in between tester and cutter’s tooth, it needs sharpening.

Secondly, to sharpen we will use a grinding wheel Silicone Carbide, Grain 80, and Grade JK (the green wheel for Widia).

Sharpening should take no longer than 2 minutes.

IT IS EXTREMELY IMPORTANT TO KEEP THE CUTTER SHARPENED AT ALL TIMES.

8. HOW MANY METRES CAN I OPEN BEFORE SHARPENING AGAIN?

It will depend on the hardness and abrasion degree of the material in which you are working on. For one full day of work it is advisable to have several milling cutters with you and change them when they get blunt.

After finishing the work for the day sharpen them again and leave them sharpened and ready for the next day of work

Materials Milling cutter lifespan*
Hollow clay brick 12.000 - 14.000 metros
Solid clay brick 4.000 - 6.000 metros
Cement block 3.000 - 5.000 metros
Mortar rendering wall 5.000 - 7.000 metros
Plaster wall/ Ytong block 16.000 - 18.000 metros

* Life of milling cutters will depend greatly on the kind, quality & abrasion degree of the materials used

9. FOR HOW LONG CAN I WORK WITH MACROZA WALL CHASERS?

For as long as you need. There is no need to let the machine rest. MACROZA Wall Chasers are built and designed to last under hard site conditions. Operator rest time will be sufficient.

10. HOW DO I SHARPEN THE MILLING CUTTER BLADE TEETH?

It is a simple two step operation.

Firstly, we will check whether the teeth need sharpening. To do this we will use MACROZA’s sharpenness tester.

If there’s gap in between the tester and the cutter’s tooth, it needs sharpening.

Secondly, we will use a grinding wheel Silicone Carbide, Grain 80, and Grade JK (the green wheel).

Sharpening the cutter’s teeth should take no longer than 2 minutes.

11. DOES THE MACHINE WEIGHT A LOT?

MACROZA Wall Chasers are exclusively designed to work being sustained against the wall, either on horizontal and vertical chases. If at any moment the machine is switched off, the chaser will not fall off and will remain attached to the wall.

This is why we say its weight is not important as the weight is not borne by the operator, but by the wall instead.

12. IT IS TRUE THAT MACROZA WALL CHASERS DON’T PRODUCE DUST?

Yes, it is true. The cutter’s low speed does not grind the material, but cuts it producing small pieces of debris that fall onto the floor.

That is why MACROZA Wall Chasers don’t need any dust collection system unlike other chasing solutions.

Having said this, if you need to use MACROZA in total absence of dust, you can attach a dust collection system to our MACROZA M95 and MACROZA SC200 wal chasers.

We recommend our dust collector MACROZA MCV1.

13. CAN I ATTACH A DUST COLLECTION DEVICE TO MACROZA WALL CHASERS?

Both MACROZA M95 and MACROZA SC200 can attach a dust collection unit to avoid dust & debris production.

The milling cutter cover comes with the option of screwing in an aluminium tube which will be connected to the vacuum’s hose.

If dust collection is not required, the milling cutter cover will be closed with an aluminium cap. This will help to collect all dust & debris on the milling cutter cover to be later discarded onto the floor.

From MACROZA we recommend use our MCV1 dust collector, specially designed to collect dust and the small pieces of debris produced.

14. WHEN SHOULD I DO THE MACHINE’S MAINTENANCE?

Approximately every 100 hours of work the following should be checked:
- State of carbon brushes. If needed, always change the pair of carbon brushes, not just one.
- There is no play in bearings. Change immediately if there is play in the bearings.
- Shoot compressed-air through the machine’s ventilation slots to clean all dust remains.
- Perfect lubrication.

For maintenance of MACROZA Diamant D2 also check for disc saturation. If the discs are saturated stop working with the machine and proceed cleaning.

To clean the discs is enough to do some cuts on brick or limestone. After this, carry on working normally.

Macroza S.L. | C/ Leñeros 15 - 28039 Madrid | Tel: (+34) 91 541 92 94 | Fax: (+34) 91 542 86 08
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