Comments for MachinistBlog.com https://www.machinistblog.com Plans, projects and how-to's for home machinists Fri, 25 Sep 2020 20:37:22 +0000 hourly 1 https://wordpress.org/?v=5.5.1 Comment on My Opinion About Harbor Freight’s Inside Track Club by Drew https://www.machinistblog.com/my-opinion-about-harbor-freight-inside-track-club/comment-page-1/#comment-110603 Fri, 25 Sep 2020 20:37:22 +0000 https://www.machinistblog.com/?p=6558#comment-110603 Does anyone know if the ITC sales are regular on their premium products like Icon, Bauer, Earthquake, Predator, etc or do you end up waiting a month or two like you would with the regular flyer?

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Comment on Restoring a Craftsman 15″ Drill Press by Mikey https://www.machinistblog.com/restoring-a-craftsman-15%e2%80%b3-drill-press/comment-page-3/#comment-110359 Tue, 25 Aug 2020 05:26:07 +0000 https://www.machinistblog.com/?p=3932#comment-110359 The most likely thing would be a burr or crud on either the quill rack or the pinion gear; there isn’t anything else directly involved. I suppose there can be contact between the quill and the screw that adjusts for side play of the quill. There may be a burr inside that groove. This would be suggested if the jump occurs at the same place every time. Otherwise, I’m stumped.

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Comment on Restoring a Craftsman 15″ Drill Press by SilverTiger https://www.machinistblog.com/restoring-a-craftsman-15%e2%80%b3-drill-press/comment-page-3/#comment-110348 Sun, 23 Aug 2020 20:01:20 +0000 https://www.machinistblog.com/?p=3932#comment-110348 My runout problem WAS the chuck and/or arbor. I did not go for the pricey ones. Spent about $45 or so at Amazon for chuck and arbor, but it seems to be fine. Having an issue with the quill “jumping” when going up and down. I don’t see anything wrong with the quill grooves or the pinion teeth on the handle. Any ideas here would be useful.

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Comment on The Mini-Mill Head Drop Problem by Max https://www.machinistblog.com/the-mini-mill-head-drop-problem/comment-page-1/#comment-110306 Tue, 18 Aug 2020 18:25:27 +0000 https://www.machinistblog.com/?p=82#comment-110306 An old thread, but one that will be relevant as long as their are Sieg X2 mini mills out there!…
I have a Micro Mark version of this mill.
I agree that the Z axis handwheel shaft key is a lousy fit, and a new key there would make for less play and backlash. Ditto on shimming the gear rack.
But neither of those came close to solving the problem.
I fitted a 48 lb gas strut to mine and it is magnificent. It can’t push the head upwards all by itself, but it keeps it firmly planted against the upper tooth of the gear travel at any position you place it, and that means that when vertically milling (like a drill press), it never spontaneously drops anymore. The head is simply “tight” in its positioning.
As for wear on the Z axis parts, I really don’t get this. First off, that head weighs 28 lbs, not 12 or 14 (don’t know where that came from). I took the head off and put it on a scale, so I know. So a 48 lb gas strut counterbalances the 28 lbs of weight, and then pushes upwards with 20 lbs of force. When you are leaning down into a steel piece cutting it vertically, you surely put that much pressure on the cutter, so I do not see why 20 lbs of upward force would cause any harm to the gears or bearings in the Z axis.
Having said that, I think that any more than 48 lbs would really be overkill. At 48, the motion is firm, but not oppressive. I can still turn the find-adjust knob reasonably easily with a thumb and two fingers. But at 70, 80, 90 lbs? I would think that would make the head shoot up vertically all on its own if you let go of it, and I don’t think you’d want that.

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Comment on Restoring a Craftsman 15″ Drill Press by SilverTiger https://www.machinistblog.com/restoring-a-craftsman-15%e2%80%b3-drill-press/comment-page-3/#comment-110304 Tue, 18 Aug 2020 12:24:16 +0000 https://www.machinistblog.com/?p=3932#comment-110304 This is an old post, but I just did mine, which is at least 25 years old. First off, the existing bearings “seemed” OK. I did not measure run out, because you could see it. I replaced them.
Second, you may not need a press. I took my quill to a local machine shop, and the guy proceeded to take a “soft” hammer and tap the spindle a few times and out it popped. So, you may want to try the same thing before heading to a machine shop.
Third, I ended up with the pulley on top of the spindle too high. I think it’s a tight fit there. I just took a plastic hammer and pounded it down till it stopped and it was fine. Maybe I should have used more grease?
Fourth, in my case, the problem is either the chuck or the attached arbor. I can still see wobble after the bearings. I have ordered a new one. You should closely examine your chuck and/or arbor before proceeding.

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Comment on Restoring a Craftsman 15″ Drill Press by SilverTiger https://www.machinistblog.com/restoring-a-craftsman-15%e2%80%b3-drill-press/comment-page-3/#comment-110287 Sun, 16 Aug 2020 15:52:29 +0000 https://www.machinistblog.com/?p=3932#comment-110287 Sears Parts no longer has ANY of the parts for this unit.

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