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What filler rod do people use for 4130? Miller recommends ER70S-2. It is mad expensive though
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poifect i'll order one of those, and start welding it together!
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Here’s what Peter offered for anyone wondering. Presumable 28.6 is top tube diameter and 31.8 is down tube/sea tube?
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I want to practice tig welding tubing as I assume welding thin wall stuff is an entirely different ball game than plate steel. Does anyone know anywhere to buy steel tubes that will go some way to mimicking the experience of welding 4130 without the cost?
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Conic frustum is my word of the day. Thanks for all your help!
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Ignoring the disproven power advantages of a curved crank, is the shape itself stronger than a straight crank? I'm basing this question on the understanding that arches are stronger than a straight lintel in buildings. However im not sure if the load needs to be applied in the center of the arch for this to be true, as opposed to at the end in the case of a crank i.e. is the force applied at the pedal of the crank arm producing a tensile force across the crank? I'm not an engineer so forgive any mistakes in my use of terminology.
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Just looking at a reggy smeggy disc tab. Not even sure what the long tang is for. Just going to be mig welding them on some mates frames, so I’m not really ‘in the market’ so to speak. For a run I’d highly recommend London water jet though. Had some unrelated work done by them and they were very helpful. All you need is a dxf and they’ll do the rest, sourcing material, setup etc
Prior to seeing this I ordered some a15 in 1.2mm which I understand to be the British Standards equivalent. My tubes appeared to average at about 1.2mm thick and I understood a filler rod of <= the size of the tube to be best practice. Going the whole hog to produce a few frames, expecting to get the bug and Building a frame fixture so I should definitely consider integrating back purging into the fixture.