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Old 09-16-2013, 06:23 PM   #451 (permalink)
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I have a hand crank on my 9x19 for threading and love it.

But you need to be ultra careful to either balance the crank or remove it judiciously. Leaving it in under power can hurt a lot.
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Old 09-16-2013, 06:27 PM   #452 (permalink)
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I ended up hand cranking the model 98 threads... My left arm was sore from doing that

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Old 09-16-2013, 06:50 PM   #453 (permalink)
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A future note to all airsmith/machinists... Tippmann 98 threads are a pain in the butt to make.

Ty
Due to the profile, or because they are so course and not very long?

I should note that I don't have much interest in making these threads in the future.
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Old 09-16-2013, 07:33 PM   #454 (permalink)
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Both. They generally suck for machining

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Old 09-16-2013, 08:54 PM   #455 (permalink)
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I have a hand crank on my 9x19 for threading and love it.

But you need to be ultra careful to either balance the crank or remove it judiciously. Leaving it in under power can hurt a lot.
I agree on that. I thought I broke my hand once and that was just a little mini lathe.
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Old 09-18-2013, 07:46 PM   #456 (permalink)
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Phew made a mess today. Had to make a new draw bar for my mill. Started out with 41L40 1-1/8" dia. I dont know if any one else has worked with that material before but I would recommend it it turns very nicely.
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Old 09-18-2013, 09:38 PM   #457 (permalink)
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I got a question. What type of media do you use in your tumblers? I have been using the small ceramic triangles in med and fine, for my aluminum parts. I use them to remove the rough and sharp edges, and then switch to walnut shells for the final step. But this seems to take way too long. So i was just curious what others might be doing and how it works.

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Old 09-18-2013, 10:27 PM   #458 (permalink)
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I got a question. What type of media do you use in your tumblers? I have been using the small ceramic triangles in med and fine, for my aluminum parts. I use them to remove the rough and sharp edges, and then switch to walnut shells for the final step. But this seems to take way too long. So i was just curious what others might be doing and how it works.

Thanks


I use the same method. but i only use one stage of ceramics then walnuts.
And I learned moving them out side to the shed makes the time go by faster as i don't have to listen to the damn things. They get very annoying.


But the only way your going to get the same or better results is to do them all by hand on buffing wheel. And thats time most of use don't have.
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Old 09-19-2013, 02:04 PM   #459 (permalink)
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I use the same method. but i only use one stage of ceramics then walnuts.
And I learned moving them out side to the shed makes the time go by faster as i don't have to listen to the damn things. They get very annoying.


But the only way your going to get the same or better results is to do them all by hand on buffing wheel. And thats time most of use don't have.
I only do one treatment of the ceramic if the parts are not too bad, then the shells with some added polish. I am curious if you run the ceramic wet or dry?
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Old 09-19-2013, 06:38 PM   #460 (permalink)
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I only do one treatment of the ceramic if the parts are not too bad, then the shells with some added polish. I am curious if you run the ceramic wet or dry?
Ceramic wet. Only issue with wet is when they come out they have a coating on them that only comes off with acid wash
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