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.


Re: Lying Is a Time-Honored Rightist Tradition

posted on 07-18-2018

On Tue, 17 Jul 2018 20:50:01 -0400, Gunner Asch So Rudy is a rightist? Interesting. read more »

Welding helmets and crappy welds

posted on 07-10-2018

one post . welding them with some Invar 42 bare rod . Tried some 312 SS but it was too close to the melting temp of the rods ,and I just ain't that good a welder . The nickel/iron rod works a lo... read more »


posted on 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

posted on 06-17-2017

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

Table of RPM for drill size

posted on 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 »

Engineering and Science

Dimmer for 4V LED

posted on 06-29-2018

I have a 4V, 0.75A, 3W power adapter (120V input) that powers a single LED that is too bright. Is there a way to make or purchase a dimmer that could work on the low power side? Thanks -- m-m ... read more »

Which magneto should I have?

posted on 07-13-2018

Hi everyone, This is my first post on this forum and I need some advice. I've just bought a Wolseley WD2 Stationary Engine with a few bits missing. Can anyone tell me which magneto I need? Most Wol... read more »

bow-facing oars

posted on 02-15-2018

Giovanni da Verrazanno logged that in 1524, he was near Block Island, slowed by heavy seas and unfavorable winds, when 20-man rowed dugouts intercepted him. At first, they kept their distance, ci... read more »

Bluestar Nantong Xingchen Introduced Filament Grade PBT Resin (StaresterFL)

posted on 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 »

What type of cleaning agent(s) can embrittle PEBAX after contact?

posted on 07-13-2018

We acquired a catheter component from a vendor that keeps breaking during use. Vendor states the root cause is a cleaning agent that is used to clean the inside of the tube that leaks onto the PEBAX ... read more »

Computer-Aided Design and Manufacturing

deployable door.

posted on 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 »

AI Mind Maintainer: Have Code, Will Travel

posted on 07-15-2018

If you have the right stuff for working in a mission-critical AGI installat ion, you may join the elite cadre of human beings charged with man-machine liaison. With your expertise in software deve... read more »

test (sorry)

posted on 01-21-2018

Sorry for the test. I'm trying to find out why I'm not seeing anything on alt.machines.cnc read more »

Hacking Course in India ? SSDN Technologies

posted on 07-14-2018

Join Certified Ethical Hacking Courses from SSDN Technologies and get certified in lowest cost and Best Pro Expert. Official Council Course. Read more: https://www.ssdntech.com/certified-ethical-hac... read more »

Peter Ponders PID YouTube Channel

posted on 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 »

Packaging Services | Card Board |Corrugated Board Packaging | Dot2Dot

posted on 08-31-2017

Art Card Packaging Any packaging sizes, designs and shapes, we can do it without any problems. With our talented designers and high technology engines, any packaging typ es are possible for us. R... read more »

Model Engineering

Collect Aire AT-9 Jeep

posted on 06-26-2018

I am looking for the 1/48 AT-9 Jeep kit...if anyone has one they would like to sell please let me know...this is the only kit I need to complete a collection of all the planes my grandfather flew in ... read more »

Tandem X launch problem

posted on 04-08-2018

Hi, this was our first rocket build and launch attempt. We got it to launc h twice, but the rocket only went about 6 - 8 feet in the air both times be fore falling. Parachute shot out after the ro... read more »

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

posted on 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 »

Handy source of windows for buildings

posted on 06-23-2018

German firm Auhagen offers packs of injection molded plastic windows at a very reasonable price. They are labelled HO/TT and they are a tad on the small side but within the realms of possibility. 48... read more »

Copper shot?

posted on 07-15-2018

Hi, I'm looking for some round(ish) copper balls, about 1/4 dia. Any suggestions? I'll need about a litre, it's for a TIG atmosphere box, eg: http://www.weldingtipsandtricks.com/purge-box-pa read more »

Best Web Hosting Coupons and Promo Codes for 2018

posted on 04-17-2018

Looking for the best web hosting coupons and promo codes for 2018? Stop sea rching for that get Up to 98% Discounts to the Best Black Friday Web Hostin g Deals for 2018 from the Top Hosting provide... 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)

Ntige Khlleistung fr Wintergarten.

posted on 07-14-2018

Hallo Ich habe eine Offerte eingeholt und da rechnen sie mit 8kW. Wie sie recht hat und wie man das berechnet. Ernst read more »

Darmowy poradnik komputerowy

posted on 06-04-2018

Witam do nabycia jest darmowy poradnik komputerowy mojego autorstwa , jak p http://solucja.pl/promocja read more »

[MANIFESTO] it.hobby.modellismo

posted on 06-21-2018

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 »

Lepsze ni TIG

posted on 07-15-2018

Powitanko, https://www.youtube.com/watch?v=mlr-rfDCdgw Mistrzostwo. Pozdroofka, Pawel Chorzempa -- >>> !!! UWAGA: ODPOWIADAM TYLKO NA MAILE: moje imie.(kropka)nazwisko, te read more »

[Conseils d'utilisation] fr.rec.modelisme

posted on 07-02-2018

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

Umlenkhebel ZV mit "Punzierung"

posted on 05-11-2018

Hallo, der heckklappe meines KFZ: http://lewonze.de/bilder/2018/zv-hebel.jpg So ist die Einbausituation, der Umlenkhebel war da, wo jetzt das (Bildmitte): http://lewonze.de/bilder/2018& read more »

Puissance apparente -2-

posted on 07-17-2018

bonjour puissance apparente qui ne correspondent pas. ----------------------- https://fr.wikipedia.org/wiki/Puissance_en_r%C3&# 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.