Welcome to Online Community for Engineers and Metalworking Enthusiasts

Latest

QCTP finished

I've finished the tool post , and I like it . The first thing I noticed , like on the very first cut , it how much less "spring" there is . After making a cut the tool doesn't leave a mark on the work...

Wind- und Solarkraftwerke als Regelenergieteilnehmer?

Hallo zusammen, ich bin gerade im Gespräch mit einem Volkswirt und es kam die Frage auf, ob Wechselrichter in Wind- und Solarkraftwerken in der Lage sind, zur Frequenzstabilisierung beizutragen....

La protection différentielle à haute sensibilité (30 mA)

Bonjour, La protection différentielle à haute sensibilité (30 mA) est elle obligatoire derrière chaque machine industrielle, ou bien l'industrie tolère t-elle des seuils de sensibilité plus...

Re: Cosmo Safe Opening

Look on the inside of the door should be 6 numbered wheels set them

What is a water cooled chiller?

A water cooled chiller is a refrigeration system that is used to cool liquids in a wide range of commercial and industrial facilities. Within the chiller are contained the essential components: an...

gwintów przed odkręceniem

Szukam środka, którym są czasami posmarowane śruby (taki niebieski). To co znajduje w handlu wg instrukcji to kleje: smaruje się klejem i od razu śrubę należy wkręcić a klej po czasie (24h)...

Is It Possible Apply + Newton III Motion Law as Dynamic System in a Motor Engine

Is it Possible to Apply Physically Newton's Third Law of Motion as a Dynamic Cycle System in a Motor Device in a + Positive Way? 3rd Thermodynamic Law Applicate in a Power-Plant Device. The Reaction...

Re: Gunze Sangyo QE2 kit - original?

The parts of the Gunze Sangyo 1/450 Queen Elizabeth 2 model look identical to the Revell 1/450, so they are probably made form the same molds. I am hoping to get some better instructions for the build...

Why Use MIWA Robotics Warehousing AGV?

*Automated Guided Vehicles (AGVs) * Automated guided vehicles help to transport materials, supplies, and inventory within warehouse facilities. AGVs are used in operations to replace manually-driven...

Best epoxy for High powered rocket building ?

I've been using the West Systems fast epoxy kit and I have been very happy with the results. Pumps, exact mixing ratio, less mess. But Giant Laep contends AeroPoxy mixed 1 to 1 is better and cheaper....

Tool Holders

I am currently researching which tools holders would best suit my needs. The majority of what I machine is either aluminum or plastic. Typical part size would fit in your hand, although I imagine I'll...

Tig Torch Recommendations?

Hi, I'm finally tired of having to let the air-cooled torch on my Lincoln SW-175 tig cool off. I'll build the radiator/pump for water cooling myself, but which torch are people liking these days? At...

Mill or lathe?

This question is probably akin to: "How long is a piece of string?". However, having done as much research as I reasonably can and with no local resources to fall back upon I feel compelled to ask...

What size plasma cutter?

I am getting a new plasma cutter. I have decided on HyperTherm ONLY. I have a Victor smoke wrench for big stuff now, and am considering this for small stuff, including some 20somethingish gauge...

Clear coat on steel

I want to paint bare new steel with a clear coat. The metal needs to be seen in its raw state. The item will be exposed to weather. I have tried three different products so far and none lasted more...

Marine batteries

After reading many nearly useless reviews I bought the only SLI31MDP that Batteries+Bulbs had, and then a hopefully similar/identical O'Reilly Super Start 31DCM. AFAICT they are both made by East Penn...

120V/240V AC Output Quality Of Welders

Has anyone hooked up an oscilloscope to the AC outlets of an engine driven welder? How clean is the output? Could you run a computer, radio, television, or laser printer off it? __________________...

Do I have 208 or 240 volts in my apartment?

I just had a new circuit installed for a dryer. I was told it was 240 volt but I'm having doubts. Would I be able to tell from the panel? The following is an excerpt from my building's electrical...

Best way to remove rust from black oxide?

I recently acquired a face mill that has a glossy black oxide surface finish. The mill is in excellent condition except that the previous owner allowed it to develop some surface rust (mostly on the...

Best way to un-weld pipe?

I've got an old fence I want to salvage some pipe from. It's a two rail fence made out of 2 3/8 drill pipe. I've cut the top rail off of the uprights, but I'm left with a short stub of pipe welded on...

What's the best way to bend aluminum

The piece is only about 50cm wide and 40cm high and 4mm thick. It is a bracket . It needs to be bent in a straight line, only about 4mm high. What techniques would you recommed with tools in a typical...

Kennedy tool box drawer felt replacement question - how to stretch felt out

I am going to put new 'felt' in the drawers of a Kennedy tool box. I would appreciate it if someone, who has done this successfully, could advise me as the these best type of glue to use? Also, are...

lead arsenic alloy - where a person might get a single ingot or a few pounds?

I'm trying to find a source for some lead-arsenic alloy. I want to use a lead-arsenic or tin-arsenic to increase the arsenic content of the lead I want to cast into bullets. Yes, I am already aware of...

Filling a shell

I have a rather shapely part that is shelled out .030 thick. Now, I need to create a new filler part that fills the inside volume of the shelled part. What's the best method to do this? TIA. Jay...

Flatten Spline

I need to be able to flatten an extrusion defined by a spline. This will be used to create a manufacturing template used to construct a light reflector. The curve of the reflector is defined by a...

Security Mfg Corp key blan k

One of my customers wanted a duplicate mailbox key but I couldn't find a blank that worked. I changed out the lock and told her when I found the right blank I'd put her's back. I don't need bitting...

Stuck Medeco lock - what to do?

Luckily, the key isn't stuck in it. I can lock or unlock it from the inside, where there's another key. On the outside, though, I was having trouble locking it, so I sprayed it with graphite. (Well,...

Can't remove key from re-keyed deadbolt

I'm installing new locks and deadbolts on a house. I bought Schlage locks at home Depot, they had to rekey the deadbolts, one of which is double keyed. The key slides in smooth and the deadbolt turns...

Welding/brazing diesel engine block

I have an old log skidder which has a long (around 24 inch) crack line running most of the length of the water jacket which is cast into the block. It was repaired years ago by the previous owner with...

Welding an engine block

Hi everyone, Have any of you had any success welding on an engine block? The engine is a Perkins diesel in a Hyster forklift. The crack is in the cooling jacket of the block. Thanks, Shawn Grind...

Dremel spindle thread size - Imperial or Metric?

Hi, Does anyone have a Dremel multitool, and could they tell me the length/diameter/pitch of the spindle thread? It may be imperial as these things are American, and around 7mm/0.275" dia. Reason is,...

R134a Thread size? Need to hook it up to 3/4" female NPT vacuum pump

I want to recharge the refrigerant in my auto air conditioner. I've assembled all the necessary tools except for one item. My vacuum pump is outfitted with a 3/4" female NPT fitting and the discharge...

Linear Pattern Problem

I am trying to use a linear pattern to create a line of caps, as long as they are touching it creates the objects correctly. But I am trying to have them 3/4" apart and it gives an error that "Some...

AutoCAD discussions 4366

⋐⋒⋐ Computer Numeric Control 2668

PRO/Engineer (Creo) discussions 2896

Solidworks CAD Design software 13020

General Robotics Forum 4966

⧑ Industrial Control Group 2147

⏚ Electrical Engineering 6696

⚙ Mechanical Engineering 2772

⚗ Material Sciences 1792

⚗ Polymers Forum 1067

⚙ Stationary Engines - UK 5105

RC and scale modeling (German) 4660

⏚ Electrical Engineering (German) 6149

⚙ General Engineering Forum (German) 1605

RC and scale modeling (French) 3821

⏚ Electrical Engineering (French) 2153

RC and scale modeling (Italian) 11464

RC and scale modeling (Polish) 11817

Engineering Science (Polish) 4870

⚒ Blacksmithing - wrought iron and steel discussions 1039

🔒 Lockmithing and Lockpicking Discussions 2432

⏣ Metalworking Craft 391

⏣ General Metalworking 30225

⚡ Welding Forums 6235

Metallurgy discussions 896

⚃ Lego Mindstorms Discussions 168

Model Railroad Forum 8012

✈ RC aircraft models 8243

Model rockets forum 6324

Scale modeling discussions 19729

⚃ Using Lego and compatible building blocks 1178

⚙ Model Engineering in the UK 6641

Model railroading in the UK 6296

Featured more »

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.

Unistrut Slotted Channel

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

Best TIG Welder For Home Use

[SOLVED] Can't remove key from re-keyed deadbolt

Interested in Metallurgy

Welding equip want to add mig/fluxcore capability

run capacitor sizing ? cannot determine original size and no manufacturer info is available

Hawker Siddeley / Electric Construction Schematics

State ofthe Art Novel InFlow Tech 1-Gearturbine Rotary Turbo Project Development

How to increase mfi of a filler master batch

Shock/impact absorbing materials?

How to Prolong Useful Life for your CNC Routers

RIsense Value for Basso's PWM-CM Model

Cannot make 2 planar end faces to cap the side sheet

Fatal error: DBX CAS 6 - AUTOCAD 2008

Acramaic 2100 Alarm 42-11?

Datum Curve by Equation and Parameters

Hobbymat tumbler reverse instructions

Star Racers - Online Model Race For Kids

75 year collection

Need Help! Neighbors Noisy Disturbs Problem

Cesaroni motors

Anyone want an 00 gauge railway in need of restoration?

what's the difference between technic liftarm and technic beam?

LEGO Mindstorms NXT 2.0 Alpha Rex with Visual Basic Programming Interface

Nulldurchgangsschalter zum Nachschalten nach Hauptschalter

digital loop tester megger lt5

Druk 3D

Dichtung, beständig gegen 50% Kaliumhyd roxid Lösung bei 90%?

Moteur qui crache du carburant par le carburateur

Caricare una Lipo

Poti"weg" begrenzen - wie (Fernsteuerung)

Wydruki 3D - oferta