Search results

I need to mill the center of a roller chain sprocket gear out. I am doing this on my manual Bridgeport with a rotary table (no DRO). My question is how I go about finding the center of the gear so I can mill the center out. I am sure this is a simple exercise for the machinists here but his is...

I am in the middle of rebuilding the quick change gearbox on my 12” Atlas lathe and am stuck on a very simple step. I have everything disassembled and cleaned and am about to start putting the gears back on the shafts. This is my question: should the gears slide easily onto the shafts or...

I bought a few lots from a machine shop auction and got a boat load of these. Anyone have any idea what they are? They seem to be in drill sizes - fractional and number. The shop had several screw machines so I am guessing they are some type of tooling.

This is my first attempt at welding in a patch panel and I have a few questions. The car is a 1974 Mercedes Benz 450 SL. Panel is the passenger side rear floor. I have a nice replacement panel from a company that specializes in Mercedes parts. The panel is 18 gauge. My question is exactly what...

Can someone recommend a good DIY compression tester? I have a 2 cylinder Kawasaki tractor engine I need to rebuild and want to do a compression test before I tear into it. I don't need a top of the line set but something that will not fall apart the first time I use it would be nice...

What do I have here? This transformer came attached to a Delta tool grinder I just picked up. The tool grinder is 110V 1 phase. I assume this was used to step down 220V 3 phase power to run the grinder. Is that correct?

I think it might be time to learn how to use a CAD program. I want to bring build a front end loader for my tractor and I'm thinking about having some parts cut out by waterjet. I figure the best way to design and have the parts cut correctly is by designing the loader in a CAD program. I've...

What do you think, should I open it?

So I am going to do my first rust repair on my vintage Mercedes 450SL. The panel is the rear passenger side floor directly in front of the fuel tank. I have a new panel to weld in and I think I know how to prep the area and trim the panel. My question is what do people do about the gas tank...

I just picked up an Atlas 12’ lathe and have a few projects that will require a boring bar. I figured I would try one that used carbide insters so I went to the Kennametal site and downloaded their catalog to check out what they offered. That’s about when my head exploded. :scared: What the...

I picked up an Atlas 12” lathe and plan on tearing it down shortly to clean it up and fix a few issues. One of the things I would like to do is replace the 1 ph motor with a VFD and 3 ph motor. I would like to do this swap for two reasons: the ease of changing speeds and to convert the lathe to...

I just picked up an Atlas 3980 12” metal lathe. It is the bench mount model with the quick change gear box. I need to either repair or replace the quadrant bracket (part #18 in the pic below). This is a bracket holds the gears that connect the spindle gears to the gearbox gears. It is broken...

I just stumbled on a machinist liquidating most of his shop. He has several lathes including a South Bend 16" and an Atlas 10". He still has several punches, a very small horizontal milling machine, several bench grinders, belt sanders, and tooling everywhere. I bought an Atlas 12" lathe and...

A friend of mine purchased a replacement belt tensioner assemble for his 14" Delta bandsaw clone. The part came assembled but we can't figure out how to get this part on the bandsaw. The tensioner slides into grooves on the upper bandsaw body, but to do that the spindle that holds the upper...

How do I measure the radius of this arc? I need to cut the same radius using a manual milling machine. I do not have a rotary table, so I will be using the method in post #10 of this thread: http://www.practicalmachinist.com/vb/general/cutting-arc-manual-mill-202096/ I am making a mount...

Anyone know where I can find the arbor flange (washer) for a 5/8" shaft grinder? It is for a Rockwell 23-104 7" bench grinder. I am missing the left hand nut and flange. A quick check of McMaster-Carr did not find one but I may not be searching with the correct key words.

I have my compressor in the basement and 3/4" black pipe running to my attached garage. Do I need to ground the air lines in the same way that the copper water lines are grounded? If so how?

For those of you in the Pottstown, PA area I just saw this on CL: http://philadelphia.craigslist.org/tld/4325792628.html I don't know anything about how the class is set up but it sounds like it may be a good opportunity for someone to get a little time on a TIG welder for a small investment...

I picked up an Eastwood Versa Cut plasma for cheap at an auction over the weekend and just got a few minutes to try it out. The unit powers up, the fan comes on and I get air flow but when I go to cut I only get sparks, no sustained arc. The work was reasonably clean and the ground attached...

I had not seen this before: Wera