Question about Metabo W14 125 Ergo Angle Grinder 5"

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May i fit bigger disc on my angle grinder,its speeed is 11000 rnd.p minutes,recomended 115 mm disc.i want to fit other big disc.may i do it?will it cause any problems?

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There are 3 problems you might face: 1. mechanical - disc shield (or protector) is too small for bigger disc. You can remove the shield (I do not recommend!!!) or buy bigger one (as I've did). 2. RPMs - on each disc you can find maximal speed of ourter part of the disc. It depends on disc diameter and RPMs. In case yo go from 115 to 125 at 11 000 RPM, it should be still OK. But I would not go further. Check how RPMs drops with increasing disc diameter. 3. motor overload. To handle bigger discs motor should produce higher torque. But if you are not pressing on the grinder and you frequently check temperature of grinder, it should work. I have Metabo WE14-125 - 1400W motor 125 mm disc: 1. I've bought new shield from WE14-150 - it fits perfectly 2. My grinder has adjustable RPMs, when I'm using 150 mm disc I'm not going over level 3 (out of 6) to keep RPM in safe range for the disc. 3. Metabo makes also WE14-150 which is almost same as mine, but produces more torque (3,5Nm vs 3,3Nm). But the dofference is very small so I'm not worried. Juraj

Posted on Jun 08, 2010

  • durikniz Jun 14, 2010

    Just checked Metabo page. They make also 150mm version of your grinder. W14 150. Technically same spec (1400W, 10000 RPM, 5Nm, 2.8kg) - you can safely do what you planned. Ask your metabo dealer to order 150mm disk shield for you, so you can work safely.
    Juraj

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You should NEVER put a larger disk on a grinder then what its rated for. Aside from the immediate issues like having to get another guard and possibly working the tool harder then what it was designed for in the event of an accident, insurance coverages are out the window and if you have a work crew using it the liability issue goes up like a rocket!

Posted on Oct 08, 2014

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