loading
Picture of How to properly load an end mill into a vertical mill
Okay folks, this is just a quick tutorial on mounting that end mill (or other cutter, etc) into an R8 collet in the mill, and getting it gripped correctly to prevent damage to your cutter, collet, workpiece, your face, your buddies face, etc. There are a few things to check on when mounting a cutter, so I'm going to step through it, one thing at a time. First off, you're going to need a mill, your cutter, and an R8 collet that matches the shank of your cutter. Here we go!

Step 1:

Picture of
Up first, we have our (1/2", in this case) 4 flute double end mill, and an 1/2" R8 collet to match. R8 collets have a pretty small gripping range, so make sure you're not trying to squeeze a 3/4" collet down to grip a 5/8" tool, for example! A proper sized collet should 'just' slide over the tool. Also, NEVER EVER use a drill chuck for milling! Drill chucks won't put up with the side loads of milling, and will loosen up and possibly slip or eject your cutter while in use... Just think how exciting that could be!
 
RhysR12 months ago

Great tutorial! I've seen my dad load an end mill into a vertical mill before, but am not confident in my ability to do it myself. I'm sure I'd even be one to use a drill chuck for milling, but now I know it's definitely a bad idea! As a newcomer to milling, I'll be sure to go through this again, especially when removing the cutter.

http://richardsmicrotool.com/carbideendmills.html

mattybrownuk4 months ago

Great article! I came across your article whilst trying to find a guide on how to properly load an end mill into an ER32 collet on a CNC router. I expect much of this information is pertenant to both setups. The thing I'm most interested in is whether it's acceptable and/or a good idea to push the endmill right up into the collet as shown in your step 4/5 pictures. Our ER32 collets only grip ~22mm of the shaft, so if I insert, say 30mm into the collet, does it matter that the top 8mm isn't gripped by anything?

glorybe3 years ago
And make certain that all of the parts of the mill subject to wear are hardened unlike some companies like Jet that sell really inferior products.