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  1. David Utidjian

    Excellent video of design and machining technique for some small parts...

    A friend of mine posted a link of a YouTube video of an excellent example of machining technique. Even though it is near an hour long I couldn't stop watching it... The machinist ROBRENZ goes through a description of the current technology of the device he is trying to make and his design...
  2. David Utidjian

    OT: Thermal Imaging Cameras types and use?

    I am looking in to thermal imaging cameras. They seem to range in price between about $1,000 and $20,000+ (big range). This would mainly be used for environmental assessment of building HVAC design and insulation. I might also use it for machine and process assessment (seeing where a machine...
  3. David Utidjian

    Wrecked a drill press today in under 5 seconds

    I was cleaning up around a 10" Delta radial arm saw that I was getting ready to move out of the shop. I found a wire cup brush with a 1/4" arbor in pretty good shape but it was clogged with sawdust and cobwebs from living under the saw for who knows how long. Figuring it was a PITA to pick all...
  4. David Utidjian

    F ECAUBERT rope knurls

    I just received a set of rope knurls and a few other knurling tools. Pics are here Some of the loose wheels are stamped F. ECAUBERT. They came with a nice shop made conventional bump knurling tool made in 1908. The rope knurls are cool looking and seem to be quite sharp. They came with a large...
  5. David Utidjian

    What my students have been making (update)

    A couple of them have been quite busy since I posted last fall. We have completed overhauling, retrofitting and upgrading one of the fours small CNC machines. A [forbidden name] mini mill that was donated by NJIT. No, we don't do production work with it but it is for teaching. And what a lot...
  6. David Utidjian

    What my students are making...

    First month gone in the fall semester but some of my students are well on their way with some projects. First pic: Doug Mayone grinding on a bracket for his electric go-kart.* Second pic: Some of the parts and layout for the kart. Third pic: Re-boring some undersized belt gear bushings for...
  7. David Utidjian

    Pinging Troup

    I haven't seen Troup (from NZ) post in a while. Last post was around mid December (about a month ago.) His profile does not accept any PMs. Troup, if you are still reading this forum, I hope all is well with you and yours. -DU-
  8. David Utidjian

    Anyone use a Kindle in the shop?

    Does anyone use a Kindle or other e-reader in the shop? I got one for myself for Xmas and I really like the format and usability. I was thinking it would be neat to have Machinery's Handbook and that other book loaded on the Kindle. It would have to be re-organized and formatted for good Kindle...
  9. David Utidjian

    Good method for getting bottom of shallow hole flat?

    I have to do a very short run of "bio-pulverizers" for the Biology unit at the college where I work. Here is a typical one. At ~$300 each it is worth it for us to make our own. I have made one already BUT it was difficult to finish the bottom of the hole so it was flat and smooth. I still had a...
  10. David Utidjian

    Toolmakers Flat Lapping Service

    Does anyone know of and/or recommend a service for reconditioning steel toolmakers flats? I have a Van Keuren and a Pratt & Whitney steel toolmakers flats that I would like to have re-lapped. -DU-
  11. David Utidjian

    Question about composite bearing material

    I have a 20" Rockwell Model No. 28-3X5 wood and metal cutting bandsaw. It has a Reeves drive that started making a horrendous thumping and rattling sound. I popped the panel over the drive system and noticed that the "moving" side of the cone pulley on the transmission was loose. There were...
  12. David Utidjian

    What is the taper on a buffing spindle?

    On a typical(?) buffing spindle what would the taper be? It looks to be steeper than a Morse taper. I know I can buy them pretty cheap ($5-$10) but I was thinking it would be a simple project for my students and it would introduce them to turning tapers with an offset tailstock center. Could...
  13. David Utidjian

    OT Future fraud

    This device from RCA (?) claims to charge your cell phone battery from "free WiFi energy": RCA airnergy charger Hmmmm.... -DU-
  14. David Utidjian

    Tap drill size for 1/4-48 thread?

    Title pretty much says it. I need to know what size drill to use for a 1/4-48 NS high speed steel tap. The material is 1018 CRS bar. The holes will be through holes. The tap is a plain plug tap (US made.) My MHB doesn't list that small. Interpolating I figure a #1 drill (0.228") is a smidge on...
  15. David Utidjian

    Opinions sought on "Holes, Contours and Surfaces" by Moore

    I recently bought a copy of “Foundations of Mechanical Accuracy” by Wayne R. Moore and I am very happy with it. I was wondering if the "Holes, Contours and Surfaces" by Richard F. Moore and Frederick C. Victory is worth getting. Does anyone have this book? Have you found it to be useful in...
  16. David Utidjian

    WTB: knurls for Hardinge L20A knurler

    Title says it all... but in this case it can be Wanting To Buy or Where To Buy? -DU-
  17. David Utidjian

    OT: Anyone worked with bamboo - plyboo?

    I was wondering about the working properties of solid bamboo composites and "plyboo." How it cuts (what tools), how it glues, sands, routes, finishes etc... Thinking of making some stuff out of it. Most of the sites I found seem to want exorbitant prices for something that is practically a...
  18. David Utidjian

    OT: Opinions on usefulness of Circular Saw Blade Sharpener

    While cleaning up the shop today I found a complete and unused Craftsman Circular Saw Sharpener Part no. 9-3532 See pics: I have never used it. It does come with a special 6" dia thin AO wheel that has a 5/8" arbor hole for mounting on the saw. Has any one ever used one of these? Are...
  19. David Utidjian

    Who makes a good MT2 collet

    I want to buy a 'good' set of Morse taper No. 2 collets for my dividing head. There seem to be plenty of import ones available but I have no idea abut their quality. Ideally I would like a collet that will deliver at least as good as +/- 0.0005" concentricity which, in theory, will contribute no...
  20. David Utidjian

    How to fix ball on vise handle?

    Title pretty much says it. I have a friend who picked up a nice Starrett vise but it is missing one of the balls on the handle. How are they normally fixed on? Swaged? Forged in place? Shrink fit? His is about 3/4" diameter bar with a ball that appears to have been forged (upset) on one end...

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