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

Releasign Threadlocker w/o Wrecking Heat Treat?

author: Doug White posted 02-26-2017

I have several Italian .22LR Olympic-style free pistols I am repairing for the collegiate pistol team I help coach. These are Pardini PGP- 75's, which are bolt action: http://picturearchive.guna... read more »

MIG weld stainless

author: Richard Smith posted 02-24-2017

Hello all I've ended up with a load of questions in my mind about MIG stainless and no answers. So what's you views on MIG'ing stainless? Here's the story, FWIW... I went to a trial weld session... 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 »

Advice for novice

author: giovannigozio1974 posted 11-24-2016

Hi to all, I'm asking for advice in order to start working on metals. Any idea will be much appreciated, from necessary tools to equipment etc etc. Regards read more »

Very clever machinist, Keith Fenner.

author: Jim Barber posted 12-11-2016

Neglect https://www.youtube.com/watch?v=ExIpXTRRUvs Resurrection The refurbishment of the Wood chop saw, seen in Neglect... https://www.youtube.com/watch?v=LKmwi2QR3Ug Resurrection Part 2 https... read more »

Engineering and Science

Special function in power plants

author: Mr. Man-wai Chang posted 02-07-2017

DO power plants have a MILITARY function that short-circuit ALL citizens' AC socket? :) -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v Simplicity is Beauty! ... read more »

Scientists decipher the nanoscale architecture of a beetle's shell

author: JEMM posted 02-23-2017

A professor of mechanical and materials engineering has found a way to analyze the fibrous nanostructure of a beetle's lightweight but durable shell. https://www.sciencedaily.com/releases/2017/0... read more »

problem with ADINA-T module

author: staramsiejakmogeale posted 09-16-2016

I would like to modell some problem using ADINA-Thermal. Unfortunatelly gov erning equation of heat conduction is Poisson's equation while I would like to solve Kirchhoff-Fourier equation (Poisson... read more »

Fish scale pattern on catheter

author: ReflowMaster posted 02-08-2017

Hi all, I am having issues when reflowing a catheter using a 40D resin pebax segment. It is presenting a fish scale effect defect, these are little flashes in a regular pattern. Materials are PTFE in... read more »

Computer-Aided Design and Manufacturing

Re: WANTED: 6-axis, hardened, Robot Arm

author: posted 02-16-2017

On Wed, 15 Feb 2017 23:53:13 -0800 (PST), sharonxiaosupplier@gmail.com ^^^^^^^^^^^^^ ^^^^^^^^^^^^^ Do you really believe that 20 1/2 years later Yoni is still waiting... read more »

New Video: Implementing the PID Controller in Software

author: Tim Wescott posted 09-08-2016

https://www.youtube.com/watch?v=JVqJ7uRGwoA -- Tim Wescott Control systems, embedded software and circuit design I'm looking for work! See my website if you're interested http://www.wescottdes... read more »

going down in flames

author: themigwelder posted 01-05-2017

hello out there this is my first post. I have a need for a working EIA ISO CNC program from a Daynapath Delta CNC controller for my VMC TREE 840 I recently purchased BOBCAD Software and am in need... read more »

Whirlpool LG Authorized repair Service Center in Hyderabad

author: gadgetsservicecentre posted 02-23-2017

Here the Whirlpool LG Authorized repair Service Center in Hyderabad is ready to work on major problem to bring winning result on the same day with no risk read more »

Download CAD Drawings | AutoCAD Blocks | AutoCAD Sym bols | CAD Drawings | Architecture Details?Landscape Detai ls |

author: jushiung posted 01-23-2017

? CAD Design | Free CAD Blocks,Drawings,Details (https://www.cadblocksdownload.com/) Download CAD Drawings | AutoCAD Blocks | AutoCAD Symbols | CAD Drawings | A rchitecture Details?Landscape Detai... read more »

.

author: Nicholas Randall Forystek posted 07-12-2016

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . read more »

Model Engineering

speed change

author: Tony Cox posted 02-22-2017

I'm currently working on a Herbert No4 Preoptive and am having a problem with the Speed changer when the button is pushed no change happens I can't see how this device works the top has been removed ... read more »

S-Scale New Locomotives/cars & Vintage Track?

author: Fizzbin posted 02-13-2017

Will new locos and cars work on the vintage American Flyer track? read more »

Looking for helo deck decals for modern US BB 700/720

author: Frank Tauss posted 02-12-2017

Mine are shot and maker doesn't list the kit just now. Read a review that suggested using the Revell Hew Jersey hull and deck and everything else from the Trumpy kit to get around the split deck ... read more »

Free to a good home: OO gauge layout

author: christopher.tidy posted 09-27-2016

Hi folks, I have an OO gauge model railway layout from the 1970s or '80s to give away er give to an enthusiast than send it to the dump. Unfortunately it has been stored for a long time in the att... read more »

Senile, stupid Booby K.......living on borrowed time.

author: Alan Baker posted 02-08-2017

He's so bitter that the end is coming up......FAST! Maybe he'll croak in his bed tonight. I wonder how his granddaughter is doing? My speculations are pretty... ...disgusting. read more »

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

author: rmrfaq posted 02-19-2017

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 »

Re: Soap Bubble Machine built from LEGO only!

author: Jacob Sparre Andersen posted 02-23-2017

derjoshder writes: It looks good. :-) Not much support for it yet. :-( Play well, Jacob -- Jacob's LEGO trains: http://lego.sparre-andersen.dk/Transport/Tog/ read more »

International Engineering (BETA)

Zu wenig Strom?

author: Georg Wieser posted 02-26-2017

Ich habe eine PKW-Zentralverriegelung schon seit Ewigkeiten in einer Die 4 Magneten tun zwar was sie sollen aber sie rammeln nicht bis zum haben die richtig geknallt und gut wars. Wieviel Strom ... read more »

3d-Druckerei fÃ?r Gummi

author: Nico Hoffmann posted 11-06-2016

Hallo, ich suche eine 3D-Druckerei, die mir ein kleines Teil aus Gummi druckt und mir zuschickt. Das Teil ist rund, 34mm im Durchmesser und 8mm hoch. Es gibt keine Eine CAD-Datei ist vorhanden. ... read more »

[Charte] fr.sci.electrotechnique

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

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 »

1S-LiPo-Servo/Empfänger gesucht

author: Andreas Neumann posted 02-01-2017

Hallo, vor einigen Jahren schon machte ich mich im Netz auf die Suche nach kleinen auffindbar, in verschwiegenen dunklen Ecken und nur gegen mehrere Barren Modell wieder in die hinterste Ecke gela... read more »

écolage avec une FF8

author: Jean-Bernard Muffat posted 02-15-2017

Bonsoir, sors de la programmation, j'ai beau faire, cet indicateur reste sur off. Qu'est-ce que j'oublie? Je suis preneur de toutes suggestion. read more »

[MANIFESTO] it.hobby.modellismo

author: Gruppo Coordinamento NEWS-IT posted 02-26-2017

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 »

Ogólnopolski konkurs kreatywny Fortum Hackathon

author: Agnieszka Szustorowska posted 02-07-2017

Fortum organizuje I hackathon energetyczny w Polsce! 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.