Its not pure bromine. Its just enough to make some plastics brittle. Its in tablet form, so it is probably an occasional 10% ?? liquid?
Why the fuss over pvc? It machines ok for me. Its much better than uhmw. On Tue, Apr 17, 2012 at 11:21 AM, dave <[email protected]> wrote: > > > Begin forwarded message: > > Date: Tue, 17 Apr 2012 06:43:13 -0500 > From: John Thornton <[email protected]> > To: "Enhanced Machine Controller (EMC)" > <[email protected]> Subject: Re: [Emc-users] machine shop > advice > > > At least I can open up the stl files and view them in 3-D. There are > several areas that are impossible to machine... they could be injection > molded but not machined. Sharp inside corners in the Z axis are not > machinable... if they have a radius they can be machined. The smaller > the radius the longer it will take to machine as the tool would be > small. I can only view a stl file and can't make a solid out of it... > > Is there some reason you selected PVC as the material? > > >From a plastics manufacturer: > . Materials that are resistant to bromine are few: titanium, fiberglass > reinforced plastic (FRP) and PVDF. PVDF was considered the best choice > because vessels made of FRP have been known to blister and fail > prematurely, whereas titanium is very expensive. > > >From Cole-Parmer database: > Listed as very good; viton, pvdf, teflon, noryl, kel-f, hastelloy-c. > Ti was listed as poor. > > Another source listed stainless steel but did not recommend Ti > > No one listed glass which is absolutely resistant to bromine but not > much of an engineering material. > > Clearly YMMV. Good luck. > > Dave > > John > > On 4/16/2012 4:26 PM, Erik Friesen wrote: > > Ok, hadn't thought that far. www.aercon.net/Public/Pumpitems.zip > > > > On Mon, Apr 16, 2012 at 5:13 PM, John Thornton<[email protected]> > > wrote: > > > >> The dxf and pdf came through this time but too much detail is > >> missing. The alibre web site says the software can export to STL > >> which I can open. > >> > >> John > >> > >> On 4/16/2012 3:36 PM, Erik Friesen wrote: > >>> Try these again.The ad_prt is an alibre file. I intend to get > >>> iges/step exporting, but currently only have alibre pe. > >>> > >>> For some reason, fireftp isn't doing its job, and was uploading > >> incomplete > >>> files. > >>> > >>>> DXF<http://www.aercon.net/Public/Base.dxf> > >>>> PDF<http://www.aercon.net/Public/Bottom.pdf> > >>>> Alibre<http://aercon.net/Public/Base.AD_PRT> > >>> > >>> On Mon, Apr 16, 2012 at 4:26 PM, Joseph Chiu<[email protected]> > >> wrote: > >>>> I've recently got a bunch of parts from FirstCut (Part of > >>>> ProtoLabs, which started out as ProtoMold) that turned out well. > >>>> Years ago, I used Rapid Sheet Metal for sheet work, and was very > >>>> happy. Their affiliate company, Rapid Machining, is working on a > >>>> piece for me right now. Their prices were better than FirstCut > >>>> for 5-days turns, while FC was better for 1-3 day turns. > >>>> > >>>> With FC and RM, they used my exported STEP 214 files from Alibre. > >>>> With FC, I use their online system to call out the threads. With > >>>> RM, I had a separate .pdf calling out my threads. > >>>> > >>>> Both places have a +/- 0.005" as a standard tolerance; but usually > >>>> achieves much better than that. FC only supports a limited number > >>>> of threads. RM appears to be more flexible. > >>>> > >>>> One thing about FC -- they claim they have a bed size limit of 7" x > >>>> 10" -- but it turns out for thinner parts, the supported bed size > >>>> can be much bigger, depending on thickness. > >>>> > >>>> On Mon, Apr 16, 2012 at 12:46 PM, John Thornton<[email protected]> > >> wrote: > >>>>> Erik, > >>>>> > >>>>> I get invalid or incomplete for the dxf and bad file for the > >>>>> ad_prt file. Can you save the file as step or iges? > >>>>> > >>>>> thanks > >>>>> John > >>>>> > >>>>> On 4/16/2012 2:00 PM, Erik Friesen wrote: > >>>>>> The 3d pdf's created by alibre are a little flaky. > >>>>>> > >>>>>> DXF<http://www.aercon.net/Public/Base.dxf> > >>>>>> PDF<http://www.aercon.net/Public/Bottom.pdf> > >>>>>> Alibre<http://aercon.net/Public/Base.AD_PRT> > >>>>>> > >>>>>> > >>>>>> On Mon, Apr 16, 2012 at 2:47 PM, John Thornton<[email protected]> > >>>> wrote: > >>>>>>> I can't see much on the pdf, do you have a cad drawing or 3d > >>>>>>> model of the part? > >>>>>>> > >>>>>>> John Thornton > >>>>>>> > >>>>>>> On 4/16/2012 1:42 PM, Erik Friesen wrote: > >>>>>>>> Around 50 pieces each. > >>>>>>>> > >>>>>>>> On Mon, Apr 16, 2012 at 2:34 PM, Dave<[email protected]> > >>>>>>>> wrote: > >>>>>>>> > >>>>>>>>> On 4/16/2012 1:35 PM, Erik Friesen wrote: > >>>>>>>>>> Has anyone here use e-machine shop, or anything like it? I > >>>>>>>>>> am > >>>> needing > >>>>>>> to > >>>>>>>>>> outsource some cnc work, but not sure where to go. One of > >>>>>>>>>> the > >> guys > >>>> on > >>>>>>>>> this > >>>>>>>>>> project had mentioned www.mfg.com, but I am pretty leery of > >>>>>>>>>> it. > >>>> It is > >>>>>>>>> all > >>>>>>>>>> plastic machining, pvc sheet. Here > >>>>>>>>>> <http://www.aercon.net//Public/Base.pdf>is one of three, > >> dimensions > >>>>>>>>>> are 4" x 2.35" > >>>>>>>>>> > >> > ------------------------------------------------------------------------------ > >>>>>>>>>> For Developers, A Lot Can Happen In A Second. > >>>>>>>>>> Boundary is the first to Know...and Tell You. > >>>>>>>>>> Monitor Your Applications in Ultra-Fine Resolution. Try it > >>>>>>>>>> FREE! http://p.sf.net/sfu/Boundary-d2dvs2 > >>>>>>>>>> _______________________________________________ > >>>>>>>>>> Emc-users mailing list > >>>>>>>>>> [email protected] > >>>>>>>>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >>>>>>>>>> > >>>>>>>>>> > >>>>>>>>> How many do you need? > >>>>>>>>> > >>>>>>>>> Dave > >>>>>>>>> > >>>>>>>>> > >>>>>>>>> > >> > ------------------------------------------------------------------------------ > >>>>>>>>> For Developers, A Lot Can Happen In A Second. > >>>>>>>>> Boundary is the first to Know...and Tell You. > >>>>>>>>> Monitor Your Applications in Ultra-Fine Resolution. Try it > >>>>>>>>> FREE! http://p.sf.net/sfu/Boundary-d2dvs2 > >>>>>>>>> _______________________________________________ > >>>>>>>>> Emc-users mailing list > >>>>>>>>> [email protected] > >>>>>>>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >>>>>>>>> > >> > ------------------------------------------------------------------------------ > >>>>>>>> For Developers, A Lot Can Happen In A Second. > >>>>>>>> Boundary is the first to Know...and Tell You. > >>>>>>>> Monitor Your Applications in Ultra-Fine Resolution. Try it > >>>>>>>> FREE! http://p.sf.net/sfu/Boundary-d2dvs2 > >>>>>>>> _______________________________________________ > >>>>>>>> Emc-users mailing list > >>>>>>>> [email protected] > >>>>>>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > ------------------------------------------------------------------------------ > >>>>>>> For Developers, A Lot Can Happen In A Second. > >>>>>>> Boundary is the first to Know...and Tell You. > >>>>>>> Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > >>>>>>> http://p.sf.net/sfu/Boundary-d2dvs2 > >>>>>>> _______________________________________________ > >>>>>>> Emc-users mailing list > >>>>>>> [email protected] > >>>>>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >>>>>>> > >> > ------------------------------------------------------------------------------ > >>>>>> For Developers, A Lot Can Happen In A Second. > >>>>>> Boundary is the first to Know...and Tell You. > >>>>>> Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > >>>>>> http://p.sf.net/sfu/Boundary-d2dvs2 > >>>>>> _______________________________________________ > >>>>>> Emc-users mailing list > >>>>>> [email protected] > >>>>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > ------------------------------------------------------------------------------ > >>>>> For Developers, A Lot Can Happen In A Second. > >>>>> Boundary is the first to Know...and Tell You. > >>>>> Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > >>>>> http://p.sf.net/sfu/Boundary-d2dvs2 > >>>>> _______________________________________________ > >>>>> Emc-users mailing list > >>>>> [email protected] > >>>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >>>>> > >>>> > >> > ------------------------------------------------------------------------------ > >>>> For Developers, A Lot Can Happen In A Second. > >>>> Boundary is the first to Know...and Tell You. > >>>> Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > >>>> http://p.sf.net/sfu/Boundary-d2dvs2 > >>>> _______________________________________________ > >>>> Emc-users mailing list > >>>> [email protected] > >>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >>>> > >> > ------------------------------------------------------------------------------ > >>> For Developers, A Lot Can Happen In A Second. > >>> Boundary is the first to Know...and Tell You. > >>> Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > >>> http://p.sf.net/sfu/Boundary-d2dvs2 > >>> _______________________________________________ > >>> Emc-users mailing list > >>> [email protected] > >>> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > >> > ------------------------------------------------------------------------------ > >> For Developers, A Lot Can Happen In A Second. > >> Boundary is the first to Know...and Tell You. > >> Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > >> http://p.sf.net/sfu/Boundary-d2dvs2 > >> _______________________________________________ > >> Emc-users mailing list > >> [email protected] > >> https://lists.sourceforge.net/lists/listinfo/emc-users > >> > > > ------------------------------------------------------------------------------ > > For Developers, A Lot Can Happen In A Second. > > Boundary is the first to Know...and Tell You. > > Monitor Your Applications in Ultra-Fine Resolution. Try it FREE! > > http://p.sf.net/sfu/Boundary-d2dvs2 > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Better than sec? Nothing is better than sec when it comes to > monitoring Big Data applications. Try Boundary one-second > resolution app monitoring today. Free. > http://p.sf.net/sfu/Boundary-dev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Better than sec? Nothing is better than sec when it comes to > monitoring Big Data applications. Try Boundary one-second > resolution app monitoring today. Free. > http://p.sf.net/sfu/Boundary-dev2dev > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Better than sec? Nothing is better than sec when it comes to monitoring Big Data applications. Try Boundary one-second resolution app monitoring today. Free. http://p.sf.net/sfu/Boundary-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
