The Home Machinist!

That's just it... I didn't think I needed a 18000 RPM machine. I have several things I want to work on (custom transmission bell housings, adapter plates, maybe one day milling a model v8 engine from a single block) that are far larger than the work area on my current mill (about 6"x18"). ...

By spindle with ATC I meant a gripper and release system built into the spindle (not a threaded drawbar or fixed collet) for quick change, probably for a BT30 with pull stud. If I really went 10Krpm+ I'd love a HSK, but I think tooling wise that's out of my price range. Before I started looking for ...

Building and assembling from pieces: casting epoxy-granite base and column with embedded steel mounting plates, scrapping in and mounting linear ways, ball screws and servos.I am looking for a combined spindle/motor assembly with ATC. Not converting an existing machine. Power wise, I'm going to be r...

The CNC forums tends not to have much traffic... but I figured I'd ask. I've been thinking about building a "big boy" CNC mill capable of working in steel and aluminum. Something to ultimately replace my manual milling machine with far great capacity and accuracy. I'm not talking about the...

I suspect along the lines of what Bill is probably going to suggest, if it is a stepped pulley I believe I would know what it may be, though I have no specific knowledge of the G3617. There is typically a splined shaft and collar that allows the pulley to drive the spindle, while the spindle can be ...

I was saying, if you have the 10A gun, Miller considers it obsolete and doesn't list parts for it any longer. The replacement for the entire MIG gun would be the M-100 or MDX-100 now. The 10A uses a different liner than the M-10. Looking again, several third parties do actually list as having the 10...

Welding voltage would be wire to ground clamp (or feed stud to feed stud at the polarity bus bars in the feed mechanism) and is only live when the the trigger is depressed (so you should really pull the wire out if testing so you don't arc/accidentally weld at the same time you are measuring). But I...

Looking at the Challenger172 manuals... the pictures are really ratty... Here is the roll picture from the Challenger manual which shows the 2 grooves, one groove is notched, the other is smooth. You just remove the set screw and flip the roll on the shaft to use the other groove. Challenger_roll.jp...

I have a Miller Challenger (not the 172, the preceding plain Challenger which had 5 settings). The Challenger's have a few common problems: 1) The brushes in the drive motor wear out, causing you to have to turn up the feed rate to maintain enough drive current. 2) The feed drive shaft brass bushing...

I built a towable engine engine hoist a while back. It works great for lifting machinery (done both my mill and lathe) and pallets into and out of the truck bed and trailers.

On #2... you would need to know the correct gear pitch to choose the cutter and it may not even be a standard size. Another option might be to use a single point cutter to cut the teeth. You can grind a tool to exactly match a good tooth profile and cut the brazed areas with that. There are several ...

Yeah, looks a lot like a Rong Fu RF-30 or similar Taiwanese manufacture mill drill from the mid 80's. Luson International seems to have been the importer and sold under various trademarks like Freeport, Millport, K-Millport, Daytona, and "National National". Looks like they started in Jan ...