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

Tip grip liquid to increase joint friction

posted on 05-26-2020

Hi folks, I have an old darkroom lamp from the 1960s. It originally had a red bulb to protect the black-and-white film. I like the style, so I'm converting it into a desk lamp. It has a pair of bal... read more »

Get the Best Welder Rental Services - Red-D-Arc Welderentals

posted on 05-22-2020

Red-D-Arc is the largest provider of welding machine rental and welder rental products and services in North America, with over 60,000 units in our fleet. Eliminate the cost and inconvenience of equi... read more »

iPhone SUPER 80% discounts

posted on 04-19-2020

iPhone SUPER-SPECIAL-DISCOUNT 80% OFF --- UNBEATABLE SUPER-PRICES !!! Save LOTS OF CASH on a wide collections of iPhones, 80% off everything must go to make place of next generation iPhone ... 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

iPhone SUPER 80% discounts

posted on 04-19-2020

iPhone SUPER-SPECIAL-DISCOUNT 80% OFF --- UNBEATABLE SUPER-PRICES !!! Save LOTS OF CASH on a wide collections of iPhones, 80% off everything must go to make place of next generation iPhone ... read more »

Lister ST2 Generator engine

posted on 05-11-2020

I have a Lister ST2 which is suffering from rising oil level, basically the fuel is finding its way into the sump! Any ideas? Thanks! 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 »

Yellowing in vinyl acrylic latex

posted on 03-10-2020

We are having problems with a vinyl acrylic latex for White coating, it has a lot of yellowing in can. What are the probable reasons for that yellowness? How can I improve that condition modifying ... 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 »

Last reminder: CfP ANTS 2020

posted on 04-22-2020

CfP: 12th International Conference on Swarm Intelligence ====================================== read more »

iPhone SUPER 80% discounts

posted on 04-19-2020

iPhone SUPER-SPECIAL-DISCOUNT 80% OFF --- UNBEATABLE SUPER-PRICES !!! Save LOTS OF CASH on a wide collections of iPhones, 80% off everything must go to make place of next generation iPhone ... read more »

Help to get started on project (Case trimmer)

posted on 05-20-2020

Hi All I'm new here, but not new to CAD, just very (VERY) rusty I want to create a 3D drawing of a Case Trimmer, Case Length Gauge & Shell Holder I can draw this in 2D without too much effort, b... 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

F-8E Crusader French Special 1/48 instructions for Hasegawa

posted on 02-09-2020

My son gave me one but without the instructions... Can someone help? Thanks. read more »

Cesaroni motors

posted on 05-12-2020

Hello, In the Pro75 6g series, 7455M2150-P and Pro75 6G 8429M2020-P. In the Pro75 3G series, 3727L1050-P and Pro75 3G 3683L851-P. we couldn't find detailed technical drawings of their engines and ... read more »

Selling Train Collection

posted on 05-21-2020

Hello, I am new to this site. My father in law recently passed leaving a train collection of mostly pre war but some post war trains. Any ideas who might be interested in buying the whole collecti... read more »

Re: Weighting rolling stock

posted on 05-07-2020

On Thu, 7 May 2020 11:29:21 -0700 (PDT), Mike Smith I model in O-scale, and use the little weights you can buy at car bits and pieces shops for wheel balancing. read more »

Limit/position switches

posted on 05-23-2020

I want to fit some position switches to my mill. I'd like the switching action to be as accurately repeatable as possible and/or reasonable. Any ideas? thx Peter Fairbrother 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)

Wago-Klemmen fr Eurostecker?

posted on 05-22-2020

mit Eurostecker (also 2-polig 230V) in einem Aufputz- Mir schwebt sowas vor wie eine Wagoklemme die auf der der anderen Seite auf ein NYM-Kabel oder so? /ralph -- ---------- read more »

[MANIFESTO] it.hobby.modellismo

posted on 05-11-2020

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 »

[S] Kleiner DC-Motor 4,5V mit "verkehrter" Achse

posted on 05-23-2020

Hallo NG! Hier[tm] steht ein alter kabel-ferngesteuerter Radlader von Gama, bei dem leider der Fahrmotor (ca. 3-4,5V) defekt ist. Dieser Motor hier [1] passt mechanisch /fast/. Die Lagerschilde ... read more »

Kontrola jakoci w dawnych czasach

posted on 05-13-2020

Henri Louis Duhamel du Monceau https://catalogue.drouot.com/imagesref/perso/full/LOT/114/23661/314_1/DUHAMELDUMONCEAU%28Henri-Louis%29Trait%C3%A9delafabriquedesmanoeuvrespourlesvaisseau read more »

[Conseils d'utilisation] fr.rec.modelisme

posted on 05-02-2020

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

Krperschalleintrag ins Gebude

posted on 05-03-2020

Hallo r-lesen... Zum Problem: Ich wohne in einem EFH, Bj.1936, Natursteingrundmauer, Ziegelbau. nz bewegt sich irgendwo zwischen 16 und 50Hz. Der Pegel ist nicht konstant Oropax bringt nix. Ich... read more »

Secteur 230 V dform

posted on 05-02-2020

Bonjour antre mon transfo sature dans les pointes de tension. Alors j'ai mis le sco https://cjoint.com/c/JEcr0SNDf8v e consommation chez moi. bien comment le Linky mesure ma consommation parce qu... 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.