Latest threads in ⏣ General Metalworkingshow only best voted threads

Subject Author Posted Replies
 
how you knew beam deflect vs stress
Jim - lost previous thread. You used that formulation for beam deflection in relation to beam *stress*... For a "simple beam" (like a plank bridging two points) deflection = sigma.L^2 / 6.E.H sigma =...
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Buy Local They Said - EV Charging Station
I try. If its not much more, if they have it, and its not more hassle than it should be. Lets start by saying the people at the local KIA dealership should really know their products better. My wife...
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mains electrical supply connectors crimping
Hello all I'd appreciate fine detail on crimp connectors for "mains" electrics in a home. Example - a "straight-through" connector looks something like this ___________/ ___________ / to connect wires...
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I'm baaaaack!
Sorry for my absence because I know it led to some false stories. Let's just say that rumors of my demise are greatly exaggerated! It is true that I was forced into a lateral move. And nothing...
 
Subject: Still alive, doing OK
I bailed out of RCM about 11 years ago when metalworking content became almost totally swamped by vulgarity and politics. But I haven't forgotten the many friends I found during the decade or so that...
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Padded Flat Platen
I've got a little 1x30 belt grinder I use for gentle deburring some aluminum parts. I use the slack belt portion and it does a decent job with a 400 grit belt. I get a lot of life out of the belts by...
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Major diameter of external thread
The nominal size of a thread is the major diameter of the internal thread, or the nut. In other words the tap's major diameter. This is the same for metric and imperial threads. When cutting an...
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battery spotwelder
Does anyone have useful experience with spotwelding nickel strips to Li batteries with an AC spotwelder as the power source? For equipment I have a Harbor Freight 240V portable spotwelder and a 240V...
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Taper-Lock vs tapered shaft
I've long wondered how well a "taper-lock" pulley secures to a shaft, relative to a traditional tapered shaft and bore. The idea would be to use a taper-lock flange on a straight shaft engine to drive...
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Ridgid tubing cutter 205
Yesterday I bought an older Ridgid tubing cutter, model 205, cast zinc, opens to 2-3/8" (2" pipe) and has 4 rollers. It needed a new cutter wheel screw which I made. It's meant for copper and...
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Re: "Yankee" Calipers & Dividers
I can tell you Starrett & Lufkin Calipers are the most popular. The Starrett differences are; Toolmaker Spring Type No.274,275,277 2-6” Caliper OD/ID/Divider = round leg / solid nut Fay Spring Type...
 
OT heater controls
Lots of experience here and I can't find the answer online ... We're working on my neighbor's 1995 Chevy truck , the heater/ac control module is shot . His truck doesn't have rear window defogger ,...
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Personality Key
I am looking for an S-74 personality key. Thanks , Rick
 
beam deflection re. stress not force - useful?!
Hello everyone While doing the project "Rectangular Hollow Section beam calculator" (-> which I mentioned here as thread "web-based beam calculator - RHS's only" I needed a neat way to go from stress...
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isn’t just for supercars...
Hi, Interesting article on 3d printing. Especially the shape of the parts they're coming up with: Additive manufacturing, or 3D printing as it's more commonly known, is more a tool for rapid...
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