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Topic: holes in post (Read 848 times)
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Onakanta4
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I tried drilling the holes with my press but it was rattling pretty hard. I ended up using sandpaper to keep it from rattling so badly. Anyways, while assembling I noticed some of the holes are a little bit off and the full thread hex bolts running through the bearings in the posts are a little skewed. The result is that the arm segment jams up and doesn't have it's full range of motion. To solve this, I've been using 4 half bolts, two on each side, and securing them with lock nuts inside the posts. I've also Jb-welded the bearings in place to make them stronger, because I'm sure they are taking more stress now. Did you have any problems with this? Do you think I can get by with four bolts, or would it be better to start over and let someone else do the holes. |
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Cody Deegan
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Usually when the press acts like that is because the RPMs are too high. I use thread cutting oil and run the drill extremely slow. I don't press it too hard either, letting the bit gradually work it's way through.
I think Loctite is much stronger than the JB weld. I've had some JB breaks before. I recently went through my entire rig and used Loctite 680 to secure all the bearings for a little extra peace of mind.
Personally I think having four bolts instead of two might compromise the stability of your arm. The only way to know for sure is to put a load on it and see if there is any friction, but I have a feeling your bearings are going to pop out no matter what. I don't suggest it at all. I'd say you should redo your posts. I know it sucks - I've had to remake many posts in my time.
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« Last Edit: May 04, 2005, 02:31:54 AM by Kevin Clark »
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Onakanta4
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The rpm's were probably my problem then, because it was hopping all over the place. I see how the four bolts would compromise the strength, but what about adding arm plates, wouldn't that help? In any case, I'm willing to see how it holds up under a load before deciding to make new posts. Now that I know what I was doing wrong, it will probably be a lot easier second time around. Thanks for clearing that up! |
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Cody Deegan
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Okay, yah, the arm plates would definitely be beneficial - that way the torque is being distributed evenly on the bearings and they won't be pried out. That's a good idea. |
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