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Mounting Diamond Wheel to a 1/2 Shaft

Im pondering how to mount this wheel on this old motor, just using it for touching up HSS and Brazed Tools.
I was thinking of making a flange which I did, but the shaft has such a large flat on it that its hard to get a good fit that runs true. Then I thought I should sleeve the motor shaft and mount the flange on the sleeve, then set screw. or maybe use a Tapered Split Compression Sleeve?
Any Ideas? Thanks


Tags: Mounting Diamond wheel to a 1/2 shaft

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Machinery in a building with a wood-framed floor

I'm looking at buying a property with an old (but structurally sound) barn on it. I'll have to build a shop on the land at some point but the money probably won't be around for a year or so.

The barn is built into a hillside and has a concrete foundation and basement; the main floor is a regular stick framed structure. I'm wondering if it's feasible to move my machinery into this space temporarily until I can get the shop built.

I have an 8k lb VMC, and about 5-6k lbs of other machines (1000-2000 lb each). The VMC is obviously the problem as the other weight can be spread out around the edges of the building, but the VMC is a pretty big concentrated load. I can install a beam in the basement under where it sits with columns and footers to hold it up, but my concern is skating it into position.


Tags: Machinery in a Building with a wood-framed floor

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Polishing in bearing fits on a T303 shaft

I have a customer from whom I've received many hardened motor shafts for modification. It's a pain in the ass. Totally doable, just not fun. I proposed to him that instead I make them from scratch in stainless. This appealed to them because there is a weather exposure element for the shafts.

The shaft has two bearing fits. One is 4mm, the other a bit bigger, for scale. A couple other precision features. The bearing fits are the nut of it though.

My Whacheon will give me .0003"- .0005" oversize on the bearing journals repeatably; I did a bunch tonight. So that's how much I need to polish off. When I did the prototype shaft for them, I polished them in with 600-grit Emory and it was quick and seemed like a workable process.


Tags: Polishing in bearing fits on a T303 shaft

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Square a lathe bed - 2 collar test question

I moved my lathe. Prior to reading here about checking for the bed being square using the two collar test I used a Machinist level. After reading here it makes much more sense to use the two collar test. No tailstock and a chunk of round stock and cut accordingly. My problem is I don't have a piece of material that is a large diameter. Would a piece of heavy wall pipe suffice for this operation?


Tags: Square a Lathe bed - 2 collar test question

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Unusual Wear on a Boring Bar

Have you ever seen this kind of wear?

It's a 3/4" carbide shank, with a brazed-on steel head.

The bar has not been used much (compared to the one it replaced). The old bar had been used for 5x as long as this one, showed no signs of this kind of wear, then got crashed.


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Help me find a home/identify these cords please.

Some rooms here are being cleaned out and I was given some material that I wanted and was given some things that I don't want but volunteered to find a home for.

I have about four boxes of these cords amounting to probably 100 total.

They are at least fifty feet long.


Tags: Help me find a home/identify these cords please.

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machining splines on a shaft

I have a Rotex vertical head that has the threads on the spindle nose about worn out. It has the double taper Y type collets. I am thinking of either machining a ER20 collet on it (will be very close for the threads if I use the mini nut with M24 X 1.0P threads) or making a new shaft with ER20. I could use a PCH-ER20-1000S-10L from Craftsman Industries Inc. Which has the ER20 nose and a 1" shaft 10" long which is just the length I need. My only problem would be the splines on the end. I looked in the Machinery handbook but they start off with a .75 shaft. I have a .625 shaft with 6 straight sided splines. The splines are .150 wide and have a root dia. of .530. I don't know how to figure out what cutter I would need for this. I could do it with 2 slitting saws and mill out the middle but I was hoping to find out what the real cutter would be for this with the radius for the minor dia. Any other info needed let me know. Thanks for the help.



Tags: machining splines on a shaft

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Looking for ideas.
I need to move a 5mm (19/32) x 1m (36) rod along 90% of its length. The drive for the rod is fixed at a single point and the rod needs to move freely both forward and backwards without interference. The rod will be in a fixture where it is supported. I considered using a low rpm motor with a Pinion Gear but I cant find a corresponding geared tube - needs to be round and not square. The rod will encounter some resistance so a non-geared solution may not work.
Someone on the forum must have solved this or a similar problem before. Any help or suggestions would be very much appreciated.


Tags: Linearly moving a 5mm x 1m rod along it Length

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