Quote:
Originally Posted by vertigo
Thanks again for all the advice in this thread. I wanted to necro it to provide an update. After taking stock of our budget for this year (trying to go to two regionals for the first time), the space available in our shop, and scouring Craigslist all summer, we have decided to go with the G704 from Grizzly. While it is certainly not a Bridgeport, I think having this will be better than having nothing at all. The fact that there are resources that describe how to convert it to a CNC is also a huge bonus.
http://www.grizzly.com/products/Dril...th-Stand/G0704
Now for my next question. Bits and accessories! What mill bits would you recommend to start off with? Brands? Any additional accessories we should consider? Any good guides for general maintenance or best practices? Thanks again! |
You might regret the Grizzly in the future. I've found that being able to take large cuts, extra work envelope, and just the sheer size of a Bridgeport is hard to beat. Although recently I have been looking into horizontal mills as lathe/mill combos.
That being said, for tooling, you will want at least:
-3/16" end mill (for milling 10-32 and 1/4"-20 clearance slots)
-1/2" end mill(for general purpose milling)(get a double-ended one of these)
-3/4" (for making existing holes larger)
-Small boring head (for boring out holes for press fits)
LMS has it
-R8 Collet set for 1/16", 1/8", 1/4", 3/8", 1/2", 5/8", and 3/4".
-Taps, for 4-40 through 1/4"-20 in all the normal imperial sizes. This depends on what your team does, but those are the ones I've used.
-Drill chuck for at least up to 3/8" drils (do not use this for endmills)
-Drill set. Numbers and fractionals at least, letter drills if you can get them. Buy shortish drills if you can, as you will probably rarely need a Jobbers size. I don't think in 3 years I've ever used anything longer than 2", and most of the time it's <= 1".
-Set of single-flue countersinks. Get 2 or 3 sizes. Fantastic for deburring holes quickly.
-1/8" thick set of parallels. You need several sizes.
-Vise. Get a quality vise, or at least one designed for machine work. A regular driling vise will not work. We have a vise with angles markings on its base, which is very useful.
-Deablow or soft face hammer to seat stock on the parallels.
-Other stuff that I've missed in this list.
Measuring tools are an entirely diferrent story. I'm going to list the ones I think you can get by on.
-6" calipers. Get good ones. Mitutoyo or Brown and Sharpe are good brands, but I prefer the former as they are consistently good across the board. Digital ones are good because you can reset the zero to whatever you like. Mitutoyo digital calipers are around $50 on ebay.
-12" ruler. Get one that has divisions in the 0.01" range, not a regular one. Better would be a 12" caliper.
-If you get a 36" ruler you can make side 2x1s for a WCD.
-Vise stop. Very useful to take stuff out for the vise to measure it.
-Small clamps. I'm partial to
these, as I use them to clamp multiple plates together often, and they're strong. Other types will work.
-Edgefinder. Spend $15 on ebay and get yourself a Brown and Sharpe or other band-name version. These determine quite a bit of your tolerances.
-Test indicator. Get the type that looks like
this. They're good for finding the center of holes and aligning the vise to the head.
-Electronic protractor. Good for making angles. It will read 90* when on a wall. You tilt it to find angles.
-Combination square.
-Scribe (Like a pointy metal pencil).
-Sharpies.
-Scientific calculator (just have one on hand. An iphone will do).
A DRO would be a great addition, but they are expensive. However, even a cheap DRO is better than none.
I have heard that 1-2-3 blocks are good to have, as well as v-blocks, but I have never used them for our parts. There was never any part big enough ot strange enough to justify using them. However, you might want to
pick up a clamping set anyway, because your vise will likely be smaller than ours so you might need the clamps.
I used the above the most out off all the ~$6k of machining-specific tools the woodshop teacher has.
I will edit this later to include more stuff, but I think I got the basics.