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Type: Posts; User: sfriedberg

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  1. Replies
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    943

    Holy cow! That study implies that just writing...

    Holy cow! That study implies that just writing on piece of Al with a Sharpie is an effective stress raiser. That has implications for a lot more than just reducing cutting forces.

    Also worth...
  2. Yes, but they won't swing all the way to 20...

    Yes, but they won't swing all the way to 20 degrees. I have an Ellis 1600, which is limited to 45 degrees either way.
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    943

    I have used kerosene for aluminum many times. ...

    I have used kerosene for aluminum many times. Currently, I use a spray bottle of WD-40 when cutting aluminum on the manual lathe.

    Kerosene (or other light oil) is an ancient recommendation for...
  4. I actually have a project in progress which...

    I actually have a project in progress which required about a 20 degree cut on some 2x3 steel tube. Since I just had a couple to do, I ended up doing them by just marking them out and cutting on the...
  5. I'm not trying to take Dan's side here, but he...

    I'm not trying to take Dan's side here, but he probably hesitated because asking about back gearing on a Monarch 10EE is the kind of question that provokes a pause in conversation. Belt-driven South...
  6. You might as well ask "Is there a cost to someone...

    You might as well ask "Is there a cost to someone in Idaho to do business in Idaho?" Taxes, for sure. Quite possibly business licenses, too. Both will depend on the specific country/region/city...
  7. Having taken possession of one of Denis' 36"...

    Having taken possession of one of Denis' 36" featherweights, this pattern work (not to mention his one-man iron foundry work!) really pays off. The casting has very crisp lines and a very elegant...
  8. Obviously there is some difference of opinion...

    Obviously there is some difference of opinion about Dan Lewis' enterprise. I have purchased tooling from him on a couple of occasions, and been perfectly satisfied.
  9. Back before the EU, he probably would have only...

    Back before the EU, he probably would have only wanted to deal inside his own country. With the EU common market, all the import/export and customs issues disappeared within the EU boundaries.
  10. Another basic FEA option is McNeel's Rhinoceros...

    Another basic FEA option is McNeel's Rhinoceros coupled with the Scan-and-Solve plugin from Intact Solutions. Higher price bracket than Fusion 360, but massively cheaper than Solidworks or one of...
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    Do not bid lower than your time and materials. ...

    Do not bid lower than your time and materials. You are not "looking for exposure". You are not "donating for a good cause". Don't be afraid to say "This is what it would cost me, with my current...
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    481

    I would comment that 12L14 is notorious for...

    I would comment that 12L14 is notorious for rusting with minimal or no provocation, and it might not be the material you want riding in your arbor bearings.
  13. macds, is a "visual structural component"...

    macds, is a "visual structural component" something like architectural trim? Fancy modular frame?
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    I'll bet a quarter they are cutters for a...

    I'll bet a quarter they are cutters for a keyseater, but no idea what brand/model.
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    978

    Hey, Digger, don't be such a snob. If memory...

    Hey, Digger, don't be such a snob. If memory serves, I asked a somewhat similar question in General about 10 years ago and about 3/4 of the respondees recommended egg cartons convoluted cardboard. ...
  16. I haven't used them yet, and they may have...

    I haven't used them yet, and they may have changed their business model along with their company name change, but you might give Thermal Modification Technologies (formerly Beaver Heat Treating) a...
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    584

    When you say you "looked at several", where were...

    When you say you "looked at several", where were you looking? Because the obvious reason you didn't find any 1/4" reamers is there were none to find. 0.2405" is not even the standard...
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    I strongly recommend that you do pull the motors...

    I strongly recommend that you do pull the motors apart to clean them out. Trying to purge old hardened grease by pushing it through with a surplus of new grease is seldom as successful as you'd...
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    978

    In addition to the good suggestions already made,...

    In addition to the good suggestions already made, if you can find some long enough, maybe flatware trays or Rubbermaid kitchen drawer organizers. If a tray has a useless (for this purpose) narrow or...
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    Flattened expanded metal will be a lot easier...

    Flattened expanded metal will be a lot easier than non-flattened. Array a diamond shape over a sheet and use the array to punch holes. Obviously creates a whole lot more geometry than applying a...
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    For the main and feed motors, I would keep the...

    For the main and feed motors, I would keep the existing bearings unless you find actual damage. They're not like spindle bearings that would telegraph irregularities into the work. Since there is...
  22. I don't think it's old-vs-new, but rather...

    I don't think it's old-vs-new, but rather thin-vs-thick. That Taft Peirce bag clearly can be clamped onto the side of things, where a more conventional sine bar cannot.
  23. Maybe sponge bath (not just dunk in tank) with...

    Maybe sponge bath (not just dunk in tank) with purple degreaser, rinse with clean water, rinse with 90+% isopropyl alcohol.
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    Looks like probably off-the-shelf modular units...

    Looks like probably off-the-shelf modular units assembled into a dedicated (custom) application.
  25. Oh, I like that. When I decided to sort out my...

    Oh, I like that. When I decided to sort out my couple hundred pounds of horizontal milling cutters, I chose by their IDs several sizes of SDR (non-Schedule) PVC pipe and got some 1/4" and 1/2"...
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