To anyone sitting on the fence in regards to supporting John on patreon, Ive been happily supporting him since he started his patreon page. The quality and the amount of content he makes available cant be beaten. Id highly recommend doing it because you really are getting value for money, especially compared to other larger youtubers.
I've run into the strangest problem with bronze, brass, oilite, all of it... I finally managed to get a fair bit of the material for a good price, practically scrap price, and now I'm hesitant to use any of it! I worry about the extreme cost of replacement stock. It's an odd situation to find myself in. 😅
Just made some bronze bushes for a timber harvester yesterday, took my little slip stone and flatted off the cutting edges a smidge on a 1- 3/16" drill, but the bugger still grabbed and snapped the tang off a 3MT drill shank ! Running out of my stash of bronze now too. I could have bought bushes on Monday, but they needed it back working ASAP.
Hi John, have you used thread wires or thread triangles to measure threads you are cutting? I know that the wires are a pain to use and I was wondering if the triangles are worth the money to buy a set and try out. Great project and great Patreon tease at the end. Best of health to you and your loved ones
@@chrisstephens6673 Are metric pipe thread forms 55 or 60? It seems that while the metric bolts are 60, the pipe thread is still 55 the same as Whitworth.
@@douglasbollinger8678 the answer is both. The entirely metric dimensioned threads are 60 but the 1/4G, 3/8G etc are British standard but without mentioning inches and 55. Unless they have changed things again since brexit 🤔🤔
From my experience in manufacturing the three wire method was normally used by inspectors to determine the minor thread diameter gauges being used to determine other dimensions. AsJohn has done in the video, machinists normally cut the minor diameter on the nose of the work pice to give a physical reference. Sometimes on drawings where less common threads are required the minor diameter is given and the drawing calls for the reference section to remain, either to be used in inspection or to allow the thread to be “bottomed out” in a hole.
@@grahamc887 three wire method will not give you the minor diameter but the pitch diameter. The minor die is so variable because you need a cutting tool with the correct nose radius or flat for the particular pitch thread. This is especially the case with ground HSS tooling, rather than full form inserts of a decent quality manufacture, where the tip of the tool if too sharply pointed would have to go a lot deeper for the PD to be correct. Of the three, the major, minor and the pitch diameters the PD is the only one that properly defines the thread fit.
