Welcome to Online Community for Engineers and Metalworking Enthusiasts

Some of our best rated resources

Have a question or want to start a discussion? Post it! No Registration Necessary

PolyTechForum.com website provides free, on-the-go reading and posting access to 32 Usenet discussion groups, completely anonymously and without requiring registration.


Spot welders?

author: SteamboatEd Haas posted 12-15-2017

--Hi gang. I'm looking to get my hands on a spot welder. 220v single phase power available and hope to get something I can put on a pestal (I'll make one) and use to tack stuff together, probably... read more »

Spot welders?

author: SteamboatEd Haas posted 12-15-2017

--Hi gang. I'm looking to get my hands on a spot welder. 220v single phase power available and hope to get something I can put on a pestal (I'll make one) and use to tack stuff together, probably... read more »

Table of RPM for drill size

author: news16 posted 03-23-2016

Is there a url around of a nice table of rpm for each drill size for the various material. Each time I need to use the vertical drill I figure it out, but it would be handy to final attack such ... read more »

! ! ! Peffect Christmass gift !!!

author: Colorful Design posted 12-09-2017

https://www.artfire.com/ext/shop/home/colorfuldesign New! New! New! Limited series. Unique artwork, PRICE REDUCED FOR A PRE CHRISTMAS SALE 70% read more »

EN AW-5754 fatigue strength

author: mw158979 posted 06-17-2017

Hello, What is the fatigue strength of 5754 aluminium alloy? Any states. thanks in advance read more »

Engineering and Science

Hashing Out These Problems.

author: Roy Q.T. posted 12-15-2017

We used to get down like Madmen ? Best Wishes for A Safe, Productive & Safe Holiday Season To You All & All. R.Q.T. read more »

steam and the European Cultural Heritage Year 2018

author: engines1951 posted 12-03-2017

Next year will be the European Year of Cultural Heritage - and this will be a unique opportunity to promote the industrial heritage. March will be the theme month devoted to energy and prime movers.... read more »

Bluestar Nantong Xingchen Introduced Filament Grade PBT Resin (StaresterFL)

author: superhua posted 07-02-2017

About Us Nantong Xingchen Synthetic Materials Co., Ltd., formerly known as the Nantong Synthetic Material Plant of the China Ministry of Chemical Industry (CMCI), was founded in 1974. It is subordin... read more »

question about thermal cooling metals, part 2

author: aesosa posted 11-25-2017

I saw a thread about this, and it seemed like everybody said that copper would keep coldest the longest. this is my problem that i need help with, I'm working a sushi catering company. I need to keep... read more »

Universal pe,pp zipper profile

author: nick posted 09-05-2017

We are manufacturers of Pe zipper profiles. Recently we are receiving enquiries about developing a universal zipper profile that can be used on both PE AND PP films. One of our competitors has alre... read more »

Computer-Aided Design and Manufacturing

Any Info for NND Nakanippon Robot Arm (Small)

author: superchargerone posted 09-19-2017

Dear All I am looking for information and particularly software to run an old NND Nakanippon Electric Co's 5 axis robotic arm. It was painted bright orange by the factory and consist of 1. 5 axis ... read more »

Peter Ponders PID YouTube Channel

author: pnachtwey posted 07-22-2017

https://www.youtube.com/user/pnachtwey The name sounds basic but I am actually targeting control professionals and those with math skills to understand the math behind the control theory. This ch... read more »

Fadal transformer issue

author: Douglas A senterfitt posted 09-19-2017

Fadal 3016 error 18 on x,y,&z transformer power issue maybe https://www.polytechforum.com/img/5z https://www.polytechforum.com/img/60 read more »

deployable door.

author: hassity posted 09-03-2017

Hey guys, I was interested on deployable systems and this time I was trying to make deployable door. The door design have two approaches 1 ) zigzag pattern muira-ori origami approach 2) hand fa... read more »

Visual Basic problem.

author: Bill DeShawn posted 06-25-2017

When I installed AutoCAD 2013, I included the Visual Basic option. The code shown below works in previous versions of AutoCAD, but not in Auto CAD 2013. Can somebody help me to get it working. ... read more »

I tried to Export the assembly from ProE Intralink workspace to Disk. But I got a message showing "An error occured on Import/Export." Do anyone help me to resolve this ?

author: Prabin posted 07-28-2017

Even I check the all dependencies everything looks good. All the sub components are exported with out any error. But Every time when i tried to export the assembly file , I get this message. read more »

Model Engineering

Bargain at B & Q

author: Gareth's Downstairs Computer posted 12-10-2017

Now , I know that we've all got hexagonal screwdriver inserts coming out of our ears, however ... masonry drills, wood cutting drills, ordinary (!!) drills, wood-cutting bits, and some of those pe... read more »

Halmark Models

author: KB8QEU posted 11-14-2017

Is Halmark Model still produced? I use to see and buy them in Dallas, Texas. I can not remember the shop that a woman ran after her husband died. Does any one remember? It was from 1979 to 1982 e... read more »

models for sale, Long Island

author: Old_Dood posted 12-12-2017

mostly 1/48 WW2 aircraft by highly regarded manufacturers.. some jets (pre 1960's vintage), some 1/32 scale WW2, Some of the models include resin or metal upgrades. I will not ship. please conta... read more »

Modelling accuracy - a valuable resource

author: Gareth's Downstairs Computer posted 10-22-2017

Just been watching the old BW film, Waterloo Road. What a valuable record of the railways and all their furniture are these old films! read more »

Sbach 30 cc gas Orange, Black, White (73"w.s.)

author: JosephJ711 posted 02-06-2017

Wanted: N.I.B. (arf) Sbach 30 cc ORANGE,Black,white read more »

rec.models.rockets FAQ Part 02 - Names and Addresses

author: rmrfaq posted 12-01-2017

Archive-name: model-rockets/addresses Rec-models-rockets-archive-name: rockets-faq/part02 Posting-Frequency: weekly Last-modified: 2002 May 14 URL: http://www.ninfinger.org/~sven/rockets/rmrfaq.t... read more »

LEGO 3D Milling Machine

author: passerby posted 03-31-2013

Saw this in another group, could not resist re-posting here: http://youtu.be/oF0pMILT7_Y NXT-based. Given that it's Easter today, can't resist the temptation to compare it to the Eggbot - similar des... read more »

Studless beams (liftarms)

author: marblypup posted 08-20-2017

I've just been reading on Wikipedia about Technic trending to studless beams. It shows how long it's been since I bought a Technic set that I didn't know about this. I did my a Mindstorms NXT when i... read more »

International Engineering (BETA)

Trenntrafo + Steckerfrage.

author: Franz Glaser posted 12-15-2017

Ich habe ein altes Auto, das im Freien steht. Da ist ein unauffindbarer 12V aufpumpen muss. an der Wand, der ich den Schuko-Kontakt mechanisch und sichtbar weggebrochen habe. (alte Bauweise: wei... read more »


author: tao taotao posted 12-02-2017

Hallo miteinander, hert: http://prntscr.com/hi6r33 Allerdings stellt sich mir hier die Frage warum die Triebwerksleistung mit read more »

[Charte] fr.sci.electrotechnique

author: L'equipe fr-chartes posted 12-02-2017

Archive-Name: fr/chartes/sci.electrotechnique Bonjour, 28 novembre 1999. =============== CHARTE DU FORUM =============== NOM DU GROUPE : fr.sci.electrotechnique OBJET : leur place dans ... read more »

??????? ?????? ??????? ???? ?? ???? ????? ??? ?????? 2018 ?

author: enas9466 posted 12-04-2017

??????? ?????? ??????? ?????? ??????? ????????? ???????? ? ??? ??? ?????? 2018 ? ? ?????? ?? ?????? ????? ?????? ???????$ 1 ?? ??????? ????????? ?????? ?????? ??? ???????? ???????? 4 - 2 5 ????? ?? ?... read more »

[Conseils d'utilisation] fr.rec.modelisme

author: J.F PION posted 12-02-2017

Archive-Name: fr/chartes/rec.modelisme ======================================================================= = Conseils d'utilisation du forum fr.rec.modelisme = ==========... read more »

[MANIFESTO] it.hobby.modellismo

author: Gruppo Coordinamento NEWS-IT posted 11-23-2017

In fondo a questo articolo, inviato automaticamente ogni mese, troverai il manifesto di questo newsgroup (it.hobby.modellismo). . Tieni presente che esistono anche questi newsgroup it.test ... read more »

Uchwyt samochodowy POLECAM !!

author: wolek0606 posted 12-08-2017

http://allegro.pl/uchwyt-samochodowy-na-telefon-uniwersalny-i7023135266.html read more »

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.