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.


What Alloy - Bottle Openers

posted on 01-20-2020

What alloy aluminum are bottle openers made from. There are a couple styles. One is quite thick, and just due to its mass it should last atleast a little while. The other is pretty thin. No t... read more »

6010 SMAW scaffold tube railings

posted on 01-13-2020

What conditions (rod size, Amps, etc.) and techniques would you use to weld scaffold tube to make railings? Standard scaffold tube - 48.3mm OD, wall thickness about 4mm, galvanised (I think that's... read more »

Re: Anvil Identification

posted on 06-19-2019

Hi there! I am looking for a couple of old Anvils that an idiot cousin sold that were family heirlooms I am uncertain of what make/brand they were, bu t the ancestor who owned then would have stam... read more »

Covert Charpy Impact Value to Izod

posted on 04-10-2019

Can you please help me , how to convert charpy impact value to Izod value. Is it any standard formaula . read more »

Mechanical part,I need a search term to find and purchase.

posted on 07-08-2019

Hi guys, I'm rebuilding my Radial Arm Saw, most the table, but need to purchase the in this picture. What is it called? Thanks, Mikek read more »

Engineering and Science

Re: OT. Antenna tester

posted on 12-11-2019

@mid.individual.net: Pretty smart little presentation sheet. Cool job. read more »

coil ohm reading

posted on 07-06-2019

I have an old commercial self propelled mower with a eh18 engine I lost spa rk so I replaced coil with a new one just like the one that came off of mow er.I had spark but engine would not start but... read more »

The best storage solution--bolted steel tanks

posted on 08-25-2019

Since 1989, Center Enamel has been supplying and installing bolted steel ta nks up to 20,000 m3 capacity. Center Enamel provides the best possible combination of the strength and fl exibility of s... read more »

What is polyethylene foam?

posted on 12-18-2019

Polyethylene foam is a durable, lightweight, resilient, closed-cell materia l. It is often used for packaging fragile goods due to its excellent vibrat ion dampening and insulation properties. It a... read more »

Dissolution of Higher MW PEO (4million, 5million and 8million)

posted on 11-28-2019

Hi everyone ; Hope you are fine. I am preparing different concentrations(0.1%,0.5%1%,3%) of above cited PEOs in distilled water, but i am always getting higher viscosity than the recomm... read more »

Computer-Aided Design and Manufacturing

Free training videos for learning Solidowrks grasshopper / Rhino / Kinetic Architecure

posted on 02-19-2019

Hi, here are some beginner training videos for learning Modo / Rhino / Solidworks (soon GH) : https://www.youtube.com/user/tgroppi Best Thomas read more »

recomendations for table top milling setups?

posted on 06-16-2019

thinking of doing some small (and I do mean _small_) milling, to make a set of molds for casting type for hand setting printing (aka Letter Press). Not sure it is a cost effective method of gett... read more »

What is a good 3D freeware CAD program for modifying this DXF camber jig drawing?

posted on 05-31-2019

Do you have experience with 3D CAD freeware on Windows to help advise me? o What 3D CAD freeware might work well for this simple DXF style drawing? The reason I ask is that, often, the expense of... read more »

6th International Conference on Control, Modeling and Computing (CMC 2020) -July 11%12, 2020, Toronto, Canada

posted on 11-15-2019

6th International Conference on Control, Modeling and Computing (CMC 2020) https://icaita2020.org/cmc/index.html July 11%12, 2020, Toronto, Canada Scope 6th International Conference on Con... 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 ?

posted on 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

From zero to 3 figure daily profits. Software

posted on 12-25-2019

Dear Reader, This is the best all-inclusive system for banking LAZY affiliate commission s. So simple for even complete beginners ? AND it grows with you when you?re ready to scale things up. C... read more »

DTH and Rotary Drill Rig Suppliers

posted on 02-23-2019

Looking for a company which supply Drill Rigs at affordable cost? Then here you go you are at exact place Focus Mining Services are suppliers of DTH & Rotary Drill Rigs in Both Australia & South ... read more »

Eishindo T Gauge is Real

posted on 12-28-2019

When I heard about T gauge, along with ZZ gauge, on Wikipedia, it appeared that these were merely abortive attempts at a smaller gauge than Z. However, I've come across a site, Tgauge.com, that is... read more »

Re: Airfix Cutty Sark at Aldi/Lidl for a fiver

posted on 12-19-2019

They had some basic Hornby starter Train sets in our nearest Branch, a serious modeller would be beyond that stage but it could make present for a young relative whose parents would never consider ... read more »

Where to buy a good screw cutting lathe?

posted on 01-05-2020

I'm thinking of selling my Holbrook C10 and buying something a little smaller. Where do people advertise good quality used lathes these days? read more »

Jacob Sparre Andersen has passed away

posted on 12-17-2018

I have been asked to announce to this group that Jacob Sparre Andersen has passed away from stomach cancer on Sunday 16th of December 2018. Jacob was admitted to hospital only a month ago, and des... read more »

LEGO 3D Milling Machine

posted on 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 »

International Engineering (BETA)

Dauerbestromung "smarter" Leuchtmittel durch Br cken der Wandschalter - Vorschriften?

posted on 12-30-2019

Mit dem aufkommenden der smarten Leuchtmittel (Philips HUE & Co) wird es immer mehr zur Sitte dass die bisherigen Wandschalter deaktiviert Was sagen den die Normen dazu (abgesehen von der Qualifi... read more »

[MANIFESTO] it.hobby.modellismo

posted on 01-12-2020

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 »

Ludzie piece strugaj

posted on 01-04-2020

Powitanko, szamotowych, albo na przepracowany olej. Pozdroofka, Pawel Chorzempa -- >>> !!! UWAGA: ODPOWIADAM TYLKO NA MAILE: moje imie.(kropka)nazwisko, ten_smieszny_znaczek, gmail.co... read more »

[Conseils d'utilisation] fr.rec.modelisme

posted on 01-02-2020

Archive-Name: fr/chartes/rec.modelisme ======================================= read more »

S: Unverlierbare Schrauben M3

posted on 11-21-2019

Etwas in diesem Stile: https://i.ebayimg.com/images/g/Yn4AAOSw3xJVaeYF/s-l1600.jpg Selbst Schrauben auf der Drehbank entsprechend nachbearbeiten geht Schraubenkopf am besten Flachkopf mit Schlitz ... read more »

[Charte] fr.sci.electrotechnique

posted on 01-02-2020

Archive-Name: fr/chartes/sci.electrotechnique Bonjour, 28 novembre 1999. =============== CHARTE DU FORUM ============&# 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.