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.

Metalworking

real jacobs 3/8" keyed chuck disassembly

author: Cydrome Leader posted 01-20-2018

I've been fussing for way to long to take apart a real Jacobs made in USA 41BA 3/8 keyed drill chuck. Their website says to close the jaws 1/2 way and press on the jaws while pressing against the... read more »

Old Miller TIG - Can I use my 212 (not autoset) As a Power Source

author: Bob La Londe posted 01-03-2018

My dad brought this by my shop yesterday evening. http://tacklemaker.info/gallery/1_03_01_18_3_13_45.jpeg Said I could use it indefinitely (that usually means he's never coming might be suitable ... 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 »

Aud

author: claytonjames570 posted 12-25-2017

Hi my name is Jim, Just got a used Aud,Added an inverter and pendant, going to to run the pump strait off 240 with a cap across motor. 30 years since I did any turning lol. Slooo looking forward to... 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

I like this ... that's all

author: Simon Roberts posted 01-19-2018

https://www.dropbox.com/s/njgmhgchxw48jtt/MIS%20three%20switches%20on%20on%20light%20bulb.tif?dl=0 Simon 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

Security Robots Most Immune To Robots/ Automatization?

author: kharwadeshubh posted 01-16-2018

Autonomous surveillance devices possessing cameras on wheels and roll aroun d patrolling any specific area assigned are known as security robots. These robots assist the guards in security by aler... 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

London ME exhibition

author: Peter Fairbrother posted 01-19-2018

is this weekend. Any good? Anybody going? Peter Fairbrother read more »

Which Would Be The Major Factors Responsible For Automotive Parcel Delivery Terminal Market Growth?

author: kharwadeshubh posted 01-18-2018

Download FREE PDF @ http://bit.ly/2DuE8bM Automated parcel delivery terminals are the advanced delivery solutions, de ployed in populous areas including shopping malls, railway stations, walkwa ys... read more »

Aircraft, Russian colours

author: Mad Modeller posted 01-07-2018

I have a kit for a Be-12 (for several years now) and whenever I think about starting it the subject of what the external colours might be comes up. S ince this group is a little slow and underman... 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 03 - Rocketry on the Internet

author: rmrfaq posted 01-14-2018

Archive-name: model-rockets/internet Rec-models-rockets-archive-name: rockets-faq/part03 Posting-Frequency: weekly Last-modified: 2002 May 29 URL: http://www.ninfinger.org/~sven/rockets/rmrfaq.to... 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)

Zusatzerder für Gartenlaube

author: Steve Frank posted 01-20-2018

Hallo Gemeinde, gegeben ist eine Gartenlaube, die keinen Fundamenterder hat. Vorstand kam nun auf den Trichter, dass alle Neuinstallationen (hier Erdungskabels zu berechnen? read more »

Triebwerksleistung

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 01-02-2018

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 »

Jeder in seiner Welt meditierend? DRMM 2018?

author: Ruediger Zoll posted 01-19-2018

Ping ey! Im Mai gibbet wieder ein Retrotreffen bei den Wehrheimern im Taunus. Sowas von gastfreundlichen Modellflugkameraden gibts sonst kaum. Sogar das Thema Retro kann man dehnen wie nen Unterh... read more »

[Conseils d'utilisation] fr.rec.modelisme

author: J.F PION posted 01-02-2018

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 12-23-2017

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 »

Sztuczka z łapaniem pierścienia przez ła ńcuszek

author: WM posted 01-11-2018

https://www.instagram.com/p/BVkfqh2FzYr/?taken-by=physicsfun -- WM 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.