| Gallery, Projects and General > How do I?? |
| 123 Blocks |
| << < (6/10) > >> |
| TroyO:
--- Quote from: Bogstandard on June 15, 2011, 11:45:46 AM ---TroyO, Don't bother, I have tried to drill them out using diamond coated tube drills designed for drilling glass. All it did was rip the diamond coating off. --- End quote --- Bogs, as an avid reader of your posts that is advice I will heed... you are right too often, LOL! (Hah, as a matter of fact my current project is following the vise keyed to the T-slots tutorial you posted a while back.) What about working it back-to-front... any chance of tempering out the hardening (At least enough to drill) on the blocks without totally fubar-ing the dimensions? I don't know that I need them glass hard anyway. Hmm, next time they go on sale I may buy a couple of "experimental sets" and bake them at 450 F in the oven for an hour or so. At worst, it's a 10$ lesson in what doesn't work. |
| websterz:
Try spot annealing with a steel rod that is slightly larger than the hole. Chuck it up in the drillpress and hold it running against the block until things get nice and hot, then let it cool slowly. You can bury it in wood ash to help slow the cooling / annealing process. |
| Ned Ludd:
Hi Guys, Rather than playing about trying to anneal selectively, why not just open the holes up with, say, a 10mm solid carbide end mill? This side of the pond they can be had at shows for only a few pounds and will cut most things, I regularly use one to machine HSS lathe tooling, which I suspect is a lot harder than a 123 block from a country who has no concept of the true meaning of "hardening". Ned |
| matnewsholme:
--- Quote from: Corvus corax on June 15, 2011, 12:48:51 PM ---Can one still get Whit dies? I guess I could make some studs for them. My 9x20 is the metricv ariant and the few times I've tried to cut UNF thread ( Haven't tried to set up for UNC yet) it came out wrong. I suspect due to mistakes in the lists of gear combos for imperial thread. --- End quote --- had the same problem with wrong threading charts on my 920 variant. have a look on 920lathe yahoo group. in files section they have correct threading charts for every version of 920 lathe. Mat |
| Rickard:
--- Quote from: Ned Ludd on June 16, 2011, 08:19:59 AM ---Hi Guys, Rather than playing about trying to anneal selectively, why not just open the holes up with, say, a 10mm solid carbide end mill? This side of the pond they can be had at shows for only a few pounds and will cut most things, I regularly use one to machine HSS lathe tooling, which I suspect is a lot harder than a 123 block from a country who has no concept of the true meaning of "hardening". Ned --- End quote --- I apologize but as a Boorish Rude American who just happen to have owned a BSA 441 and an MG Midget , I can say with total confidence Brittan would be a country who has no concept of the true meaning of "hardening"! as we all know British steel has an 80% Stilton Cheese filler content. Now Stilton Cheese being a soft cheese can not be hardened! |
| Navigation |
| Message Index |
| Next page |
| Previous page |