Yes, generally when something is expensive to manufacture it is because the designer was not thinking about costs. A design with 40 size "tiny" thread holes in just not cost-effective. A redesign could save hours work.
On Thu, May 18, 2017 at 11:16 AM, Tim Shoppa <[email protected]> wrote: > I'm very dubious that you need a tapped 4-40 hole to be threaded any deeper > than 0.25". If you work with the machinist I'm sure you can come up with > some reasonable spec that does not require a bottoming tap and will save > you a lot of money. > > I bet you went to 0.25" wall square tubing only because you want to tap the > walls for 4-40. Alternative designs can let you use much thinner material > and a very different flange on the ends, but the costs will likely move > towards welding/brazing rather than machining. > > Tim N3QE > > On Thu, May 18, 2017 at 12:54 PM, <[email protected]> wrote: > > > Hi, > > > > I have a square aluminum tube 5" X 5" with a .25" wall it's 8 1/2" long. > > > > I need 20 holes in each end tapped for 4/40 and 1/2" deep. > > > > This is for a Rubidium project. > > > > The local machine shop want's $360.00!!!! > > > > Anyone have a machining setup that could do the work a bit cheaper? > > > > If not I'll give it a try myself. > > > > Please contact me off list. > > > > Thanks! > > > > Corby Dawson > > > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > > mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
