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Recent content by sfriedberg
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OT-register domain name - what do i really need?
That is much more than just registering a domain name. That is full-on webhosting service, with facilities for backing websites with databases (which is typical), file storage, monthly bandwidth quota, and multiple moderator/administrator users. For that price, they will register 15 distinct...- sfriedberg
- Post #12
- Forum: General
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OT-register domain name - what do i really need?
You don't need any of the extra security stuff, but you should set your domains to prevent deletion, transfer or update via the web client to prevent hacking. However, if you don't pay the registrar the extra fee for "privacy" all your contact info as the domain owner will be public. You will...- sfriedberg
- Post #5
- Forum: General
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Need help sourcing information for a German lathe
Yes, "Steel and Rolling Works, Groditz". The 6776 and 6774 tags are probably asset tags from the owner, not badges from the maker.- sfriedberg
- Post #9
- Forum: Antique Machinery and History
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Anodizing Dyes
Yeah, UV resistance should be one of your primary criteria. Most red dyes in particular are especially "fugitive" when exposed to sunlight.- sfriedberg
- Post #4
- Forum: General
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corrosion resistant Brass or Bronze
Yes, clear lacquer probably extends the tarnish-free lifetime of brass hardware by decades.- sfriedberg
- Post #3
- Forum: General
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OT: Time dilation module on facebook
I think it's a joke, rather than a scam. Generically, it's a bunch of vacuum chamber stuff, likely custom-made. There was probably no point in naming the process or experiment the stuff was used in.- sfriedberg
- Post #2
- Forum: General
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Machining the end of a block without a square reference.
There's an extended version of this technique that can make a rectangular solid with square/parallel sides out of arbitrarily gnarly, messed-up raw stock in seven cuts. It's in either Tom Lipton's book or Jame Harvey's book, can't recall which. (Buy them both.) I've taught this at the high...- sfriedberg
- Post #15
- Forum: General
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Possible types of steel for this bushing plus alternative recommendations
It's noticeably worse than 1018 or 1045. I don't turn enough 1144 to say with confidence.- sfriedberg
- Post #9
- Forum: General
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Possible types of steel for this bushing plus alternative recommendations
Be aware that the 12L14/12L15 varieties will rust if you breath on it, look at it harshly, or turn your back on it. :(- sfriedberg
- Post #6
- Forum: General
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Cincinnati Monoset Tool and cutter grinder new user.
The Monoset is an extremely versatile (and complex) tool making machine. If you just need engraving cutters and various D-bit (single flute) cutters, a benchtop Deckel grinder (or clone) would be vastly simpler to learn how to use.- sfriedberg
- Post #3
- Forum: Abrasive Machining
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Aluminum bowl milling advice needed
The experienced mill operator's advice is "this is a lathe job!" You don't have a lathe, and you don't have a real mill. Do you have a rotary table? Can you tilt either the rotary table or the head of your mill/drill? If so, there is a technique for milling spherical sections that would be...- sfriedberg
- Post #6
- Forum: Fabrication: CNC Laser, Waterjet, Plasma, Welding
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Drill size for 25mm boring bar with 32mm min bore ?
Technically, 32mm is all you need, but you'd have to start with several quite shallow passes to make room for larger chips. 33mm would be much less fussy in making your first passes. 37mm should give you ample room to take heavy cuts.- sfriedberg
- Post #3
- Forum: General
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Reversing Contactors Wiring Diagram
Inductive surge/kick suppression, I would assume.- sfriedberg
- Post #19
- Forum: Transformers, Phase Converters and VFD
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How would you build a sound proof compressor room?
This is especially hard. Basically, you need to run long ducts with lots of bends so soundwaves impact the interior walls a lot, and line the ducts with acoustic duct liner which is typically 1" or 2" thick. For the walls of your compressor room, there are lots of techniques but the two main...- sfriedberg
- Post #16
- Forum: General