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Type: Posts; User: sfriedberg

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  1. This is absolutely true, and makes a huge...

    This is absolutely true, and makes a huge difference when trying a deep DOC rough bore.
  2. The usual rule of thumb (OK, "specific power")...

    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...
  3. I have lower-load-rated versions of those casters...

    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...
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    Shore 85A is roughly equivalent to Shore 40D, so...

    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...
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    Because collector is an individual with a massive...

    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...
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    Seriously? digger doug, you spend a lot of time...

    Seriously? digger doug, you spend a lot of time policing the forums already. Why not taking on the moderation job for one forum?
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    You sure those aren't just simple cored holes in...

    You sure those aren't just simple cored holes in the casting that nobody bother to machine cylindrical?
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    I used to release tension on my bandsaws all the...

    I used to release tension on my bandsaws all the time, but no longer do. On the other hand, if I put another 1/16" or 1/8" blade on the Inca 710, I probably will release tension again.
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    I sent a reply direct, but for the forum: P20...

    I sent a reply direct, but for the forum:

    P20 PrismCut

    I received an ad for this machine a few weeks ago, so it was still fresh in my mind when the part marking question came up. There are...
  10. Today's my day for buying indexers et cetera! ...

    Today's my day for buying indexers et cetera! I'll take it. PM to follow.
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    On a related note, about 20 years ago I worked in...

    On a related note, about 20 years ago I worked in some buildings that were connected by elevated skybridges. The internal mail was carried throughout the complex on electric vehicles with a stand-up...
  12. Once upon a time, this would have been called...

    Once upon a time, this would have been called "planetary milling" and, if a helical path were involved, perhaps "thread whirling". Was a pretty standard technique for shops doing mass production of...
  13. Not sure the B&S 105-200 is like the...

    Not sure the B&S 105-200 is like the corresponding Hardinge part, but if it is, you will have to remove the outer shell (screw at the bottom of the tool shank hole) to get to the left-right toggle.
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    I'm going to make an almost totally unsupported...

    I'm going to make an almost totally unsupported speculation, and encourage you to get the sample XRF-gunned as was already suggested.

    I speculate that this is a modified 4140 with an approximate...
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    I'll take it. Will send PM. [Added in edit]...

    I'll take it. Will send PM.

    [Added in edit] Well, I tried to send a PM, but your PM inbox is full. Send me an email or a PM and I will get in touch to exchange payment and shipping addresses.
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    Do you need letters smaller than 2mm height? ...

    Do you need letters smaller than 2mm height? There's a commercial vinyl cutter that's rated for 2mm letters, not too expensive, if that's of use to you. Let me know and I will dig up the reference....
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    The Net Police gotta police, ya know. No statute...

    The Net Police gotta police, ya know. No statute of limitations for the crime of spamming. :-)
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    I took mine off using a gantry crane, and I...

    I took mine off using a gantry crane, and I estimated the ram on a #28 between 600 and 800 lbs. At that time, I did not have a hook scale to get an accurate reading.

    BTW, I needed help from the...
  19. That's a very substantial fraction of the price...

    That's a very substantial fraction of the price for a new NSK Planet 550, for a decades-old grinding head. Bring the price down to $hundreds, please.
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    I had no idea he was a cryptologic linguist. I...

    I had no idea he was a cryptologic linguist. I was in USAFSS (later ESC) rather than ASA, but did very similar work while I was in service.
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    When I made some punches to cut rings from felt,...

    When I made some punches to cut rings from felt, I used roughly 40 degrees included angle. It's my impression that C.S. Osbourne arch punches have an included angle more like 25 degrees, when the...
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    You have several responses over in the Antique...

    You have several responses over in the Antique Machinery forum.
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    According to a 1941 industry-wide price list...

    According to a 1941 industry-wide price list (part of the early WW II industrial management program), the Duplex mills were already obsolete in 1941, with the 22L being the suggested replacement for...
  24. If it's ready to run, meaning all the pieces are...

    If it's ready to run, meaning all the pieces are there to plug it in, chuck a diamond pin or mounted stone with a standard sized shank, and get to work, I'd be interested in discussing price. Not...
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    I can't help, but I can sympathize. 45 taper? ...

    I can't help, but I can sympathize. 45 taper? Very rare, at least in my 30/40/50 world. Shell/face mill arbor with 7/8" pilot? Very rare. Both at the same time? Ouch.

    If you score a 45 taper...
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