MIRKA ROS User Manual (English)

Questions and Answers:

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Megan RodriguezJul 30, 2025
How to fix low free speed on my MIRKA ROS?
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  Ashley ClarkJul 30, 2025
  To address low power or low free speed in your MIRKA Sander, start by inspecting the air line pressure at the sander's inlet during operation; it should measure 6.2 Bar (90 psig/620 kPa). Other possible causes include: * Clogged muffler(s): Clean or replace as needed. * Plugged inlet screen: Clean or replace if cleaning is insufficient. * Worn or broken vanes: Replace with a complete set, coating them with pneumatic tool oil. * Internal air leakage: Check motor alignment and lock ring engagement. * Worn or broken spindle bearings: Replace the bearings.
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Corey BryantAug 6, 2025
What causes air leakage in the speed control of my MIRKA Sander?
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  Justin GuerraAug 6, 2025
  Air leakage through the speed control or valve stem of your MIRKA Sander is often due to a dirty, broken, or bent valve spring, valve, or valve seat. To resolve this, disassemble the affected components, inspect them carefully, and replace any worn or damaged parts.
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Crystal WilliamsAug 14, 2025
Why does my MIRKA Sander have low power?
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  Lawrence RamirezAug 14, 2025
  If your MIRKA Sander has low power or low free speed, first check the air line pressure at the inlet while the tool is running; it should be 6.2 Bar (90 psig/620 kPa). Other potential causes include clogged muffler(s), which can be cleaned or replaced, a plugged inlet screen that needs cleaning or replacement, worn or broken vanes requiring a complete new set, internal air leakage in the motor housing (check motor alignment, lock ring engagement, and O-ring), worn motor parts (in such case contact authorized Mirka Service Center), or worn or broken spindle bearings that need replacement.