homemade Wood Router - project failed And almost got me seriously injured- READ DESCR

**stubb** · Oct 15, 2019, 12:57 AM

wow , could have turned out a lot worse than the tool breaking

**pfredX1** · Oct 15, 2019, 01:41 AM

What broke? The chuck just flew off. That's to be expected. Some JB Weld-It can fix that right up.

**Henk Bannink** · Oct 15, 2019, 06:50 PM

Most people find it difficult to say I messed up but this post has probably taught a lot of folks a most valuable leson. Thanks for a visual warning, besides the shaft failing the rest looked great

**thehomeengineer** · Oct 16, 2019, 04:17 AM

Hi
Another issue is side loading a drill chuck.
This is also why you should never mill using a drill chuck as they are not designed to take side loading. I have seen several people snap chucks off arbours while milling. One was my boss

last year.

**pfredX1** · Oct 16, 2019, 06:00 PM

I've heard you should never side load drill press bearings. I mill with a 3 jaw chuck in my mill all of the time. Not a problem. I have collets for my mill too. Just not enough. The last slot I milled the day before yesterday I put an end mill into my drill chuck. I don't have a 5mm collet for my mill. I needed that slot milled though. I didn't know if that end mill could cut steel, or not. It was an el cheapo import jobbie I'd bought for my CNC engraving machine. I have all of the collets for it. It only has an ER11 holder though. And there's little chance it can mill steel. I never tried and I doubt it can. It's a soft materials machine. Wood, plastic, stuff like that. Maybe some aluminum. The OZ25 on my mill is a bit harder on the wallet to fill out the set on. I'm thinking about picking up an ER32 holder for it. I could get the holder and a 9 collet set for about what 3 OZ25 collets would cost me. I feel burned either way so I haven't done anything. I've heard some bad things about some of them ER32 holders too. Which makes me leery to get involved. I know my OZ25 holder is good. I've been using it for decades now. Collets for it are just so damned expensive though.

**LeeHael** · Oct 16, 2019, 07:24 PM

Diyfixman,

I don't think the speed was too fast for routing, just too fast for your under spec'd connection with a too heavy lump of non-concentrically turning metal. Tiny, short shaft, loosely fitting sleeve, held on by set screws. Couldn't expect that to resist all the forces trying to tear it apart. Because of the length of your chuck and bit combination, the effect of the first little bits of deflection, due to imbalance and the load on the cutter, rapidly became magnified and ran away. Lee