Replacing The Backing Pad - MIRKA DEROS 550 Manual Del Usuario

How to get started
When unpacking the tool, make sure it is intact, complete and has not been damaged in transport . Never use a
damaged tool .
Before use, check that the backing pad is correctly attached and tightened . Connect the power cord to the sander .
Connect the power cord to a grounded outlet (220–240 VAC, 50/60 Hz).
In order to get the maximum power from this tool it is recommended to use it with the Mirka dust extractor (or
other suitable dust extraction unit) and Mirka Net Sanding products . The combination of Mirka sanders, net sanding
products and Mirka dust extractor are the basis of Mirka dust-free sanding solutions.
The power cord from the sander is connected to the mains supply on the front of the dust extractor . By connecting
the sander's power cord to the outlet on the dust extractor it is possible to use the dust extractor's autostart function.
Operating instructions
• T he tool is intended to be operated as a hand held tool. The tool can be used in any position. Note! The sander can
develop a torque reaction when started.
• M ake sure the sander is switched off. Select a suitable abrasive and secure it to the backing pad. Make sure the
abrasive is centred on the backing pad . For optimal performance we recommend a Mirka backing pad and Mirka Net
Sanding product .
• S witch on the sander by pressing the On/Off key, Figure 1. The sander LED is now green.
• T he sander can now be started by pressing the lever.
• T he speed can be adjusted between 4,000 and max rpm by adjusting the position of the lever.
• T he max rpm can be adjusted by pressing rpm+ or rpm–, Figure 1. Each press increases or reduces the speed by
1,000 rpm until it reaches the limits . The rpm can be adjusted in the range 4,000 to 10,000 rpm .
• T he tool has two speed control modes. In the default mode the speed can be adjusted linearly by changing the
position of the lever. In the other mode the speed remains fixed at the set max rpm when the tool is running. When
the rpm+ and rpm– buttons are pressed simultaneously the tool toggles between the two controlling modes .
• W hen sanding, always place the tool on the work surface before starting the tool. Always remove the tool from the
work surface before stopping it . This will prevent gouging of the work surface due to excess speed of the abrasive .
• W hen sanding is finished, turn off the sander by pressing the On/Off key. The sander LED is now turned off.
Maintenance
Always disconnect the power before maintenance!
Only use original Mirka spare parts!

Replacing the backing pad

1 . Insert the pad wrench between the backing pad and brake seal to hold the spindle nut .
2 . Turn the backing pad counterclockwise to remove it .
3 . Fit and tighten the new backing pad with washers .
4 . Remove the pad wrench .
Replacing the brake seal
NOTE! Too much vacuum in your dust extraction system may cause the brake seal to malfunction .
1 . Remove the backing pad as described above .
2 . Pull the old brake seal out of its groove .
3 . Fit the new brake seal in the groove .
4 . Fit the backing pad as described above .
5 . Check the brake seal function . By changing the number of washers between the spindle and backing pad,
the effect of the brake seal can be adjusted .
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Mirka® DEROS • 125 mm (5") & 150 mm (6")
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