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| making a hex head |
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| PekkaNF:
--- Quote from: timeone on June 27, 2011, 04:40:45 PM ---Another question when holding bolts in a chuck how do you protect the thread from getting damaged --- End quote --- Most of the nuts are way off. Sometimes you'll find some stand-offs that are used on hydraulic valves and such, they tend to be true. I'll chuck oversize to nut round rod, drill, tap, skim outside and face and part off. Now the thread and face is true. Then I'll stighten the bolt/nut/whatever AND use counter nut to tighten the whole cacadoodle up. Never trust only one screwed joint when turning or milling. How I have learned this? Guess :lol: Also, camber the "secondary" side of the jig, then you know which is better side, you probably will need again. Pekka *typozz! |
| Jasonb:
--- Quote from: timeone on June 27, 2011, 04:40:45 PM --- Another question when holding bolts in a chuck how do you protect the thread from getting damaged --- End quote --- As Pekka says make a small holder from round or hex stock. I have a whole load accumilated over time, Mostly made from brass hex with a female thread on one end and a male on the other comes in very handy when making things like steam fittings. Have the part you grip in the chuck about an inch long and it will be true enough to the lateh axis, trying to use just a nut will be hard to align true. J |
| No1_sonuk:
--- Quote from: timeone on June 27, 2011, 04:40:45 PM ---Another question when holding bolts in a chuck how do you protect the thread from getting damaged --- End quote --- This depends on whether or not the unthreaded part has some form of drive. If it's a bolt (or you're making it into a bolt), you'd be best off making a long holder for it. When you're done, you can unscrew it using the head for drive. This method may lock the bolt into the holder because of the cutting action tightening the bolt. It almost certainly will in a lathe. If there's nothing to grip to unscrew it (like a particular part I make) you can use 2 nuts locked together. This is so that you can grip the threaded part away from the end of the thread, meaning you can remove the nuts easily once they're unlocked. A more accurate variant would be to make a holder shorter than the thread, and larger diameter than a nut, and lock a nut on the end. |
| timeone:
Thanks guys Today your answers got me thinking so ive made up several alloy threaded adapters to try im even thinking about running a slit saw down them so as i hold them in the chuck they get tightened. |
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