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But crucially, no foot that includes the bend would pass.

Yeah, I bought my 16x40 from Precision Matthews 10 years ago. Functionality is fine. Fit and finish would never be confused with a current Euro, Japanese or Korean machine.

PM the company was...

I am with the guys above. It's been decarburized, or improperly treated, or both, and the HT guys absolutely should have controlled that. The "have to HT three times" thing is BS. I get perfectly...

Enzo, what's your location, and how big are those spindles? I can't even guess at shipping without that info. I have a tool&cutter grinder that could use an ID attachment, so size (tool shank...

Good question, and I can't get at my VN docs for more than a week. My impression is that it should be equal or less than an R8 setup, which in practice is a lot less than ER.

Yes, it's obsolete. Still quite useable at HSS speeds. The biggest drawback is that you really need a tool&cutter grinder to maintain it. 2nd drawback is unavailability of replacement inserts, I...

subhanshahid9492, a lot will depend on the original design of the induction furnace. It's been my limited experience that induction furnaces don't have anything that remotely resembles a firebox or...

This. And I tell all the high-school students I am mentoring "Everything is made of rubber," including your measuring instruments.

stoneaxe, gimme a PM or email the next time you need to use a set of gage blocks.

Congratulations on a fussy job well done with improvised equipment.

I used to say "Har ding ge" but was corrected to "Har dinj", rhymes with hinge, but maybe with a little tailing "eh".

Over on his featherweight straighedge thresds, dgfoster shows a similar attachment he made for the specific purpose of working in a recess under an overhang.

In thin sheet, PEM nuts will definitely be stronger. Also more consistent in thread quality. You'll have to ask your particular sheet metal house about the relative cost of tapping vs...

Thickness tolerance is informally +- 0.002". In this particular situation, curling won't be an issue. The finished part will be restrained, and the customer is willing to hand-flatten if it won't...

XavierC, the nose end of that spindle suffered some major catastrophe at some point in its history. I have a hard time imagining exactly what happened, but a significant hole in the spindle, just...

At the high school, we put a power drawbar on a Jet clone of a Bridgeport. The original drawbar washer was badly made. While evidently case-hardened, the case was so thin and the bulk metal was so...

We've got a one-off job coming up where we need to reduce the thickness of some stock 0.125" 6061 sheet to 0.098" and also cut some 0.050" to 0.070" slots the majority of the length of the part. My...

They made some models for decades. However, I've just bought a 9" that isn't in an early 1970's catalog, so there was some product line turnover. If you can find a model number, that will certainly...

I'd be interested in hearing differing experiences, but I think you will get nowhere trying to turn the anodize layer. The anodize layer is basically a very hard mineral with a much tougher...

This is absolutely true, and makes a huge difference when trying a deep DOC rough bore.

The usual rule of thumb (OK, "specific power") for metal removal applies to spade drills just as other basic cutters. 1 cubic inch of steel per minute per horsepower. 3 ci/min/HP in aluminum.

I...

I have lower-load-rated versions of those casters on a Nichols hand miller (about 1,200 lbs) and a floor-standing 12T arbor press (about 1,800 lbs). I'm quite happy with them, using four casters in...

Shore 85A is roughly equivalent to Shore 40D, so very much softer than Shore 80D. However, both are "hard". A hard rubber caster tire might be 85A, while a hard hat or other rigid plastic item...

Because collector is an individual with a massive personal collection of old iron. I've never seen a photo that included more than one aisle of his shop, and he's not given to bragging about it...

Seriously? digger doug, you spend a lot of time policing the forums already. Why not taking on the moderation job for one forum?

You sure those aren't just simple cored holes in the casting that nobody bother to machine cylindrical?