ER11 Collet Nut Torque

[WillAdams (William Adams (Carbide 3D))]

c.f.,

Over-tightening ER collets?

Not sure where to post this, so I chose here. I had some bit slippage in my C3D router, so rather than spend $20 or so on new Makita Precision collets, I spent $60 for the ER-11 version of the router, with two ER collets. I’ve not had a problem since. However, I just watched this video, which shows that over-tightening ER collets will often result in increased runout, and can damage the collet, maybe even the spindle shaft: It recommends using a torque wrench. I have 3 torque w…