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David Dobedoe

Beau Jo chipper torque settings for blades

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I am going to swap the blades on my Beau Jo M300 chipper. Does anyone know the torque settings for the bolts. I'm struggling to find the documentation.


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A Neanderthal but effective way is to use a Makita mains powered impact wrench and stop tightening the moment the rattler kicks in.  I went tighter than that once and paid the price by means of a shattered blade, the main crack starting at one of the bolts.

Since going a bit easier on the tightening I've had no problems.

A major benefit of the wrench is that it preserves the corners of the blade bolts as the force is applied only to the long sides of the bolt heads.

Edited by nepia

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I have ground the front face of my 17mm impact socket flat so it sits down nicely to the blade, then use the same socket on impact driver and torque wrench. It's a six sided so like you say drives nicely on the flats.

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