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Thread: AL336 main bearing confusion
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9th Mar 2018, 01:29 PM #16Noobster
- Join Date
- Jun 2009
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- Bundaberg QLD
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- 42
Purchased Lathe in 2011 sometime
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9th Mar 2018, 01:52 PM #17Noobster
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- Jun 2009
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- Bundaberg QLD
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- 42
Thank you for this post. I Lolled at the Jog button comment! (Like putting oil behind the chuck or on the back gears while it is running!) I did not have this problem as I had my lathe switched off. I did squirt some diesel down the internal gutters an watched it disappear down both gravity feed holes.
I replaced the oil in it only recently and removed the old oil and managed to get a few rags in around the spindles to fully wipe up all the existing oil and diesel which I used to clean the Gears,spindles and anything I could clean up. Managed to find a little spot of molding sand in one of the corners which was cakes on hard.Needless to say she was nearly spotless before adding the new oil(iso46 hydraulic fluid).
My lathe has been very noisy since I have owned it and assumed that is normal but recent you tube videos of other people's lathes have convinced me a few new bearings might just be what's needed for this lathe's longevity and my ear drums.
I realise this may do very little for noise but running my lathe with hearing protection on is annoying.
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9th Mar 2018, 01:53 PM #18Most Valued Member
- Join Date
- Apr 2012
- Location
- Healesville
- Posts
- 2,129
Yes if they are tight it will still turn freely, depending on how tight they are.
I would sugest that if you cant find that the screaming is coming from elsewhere then it would be a good idea to loosen the adjustment nut off, spin the chuck around by hand a few times then run the adjustment nut up till it just touches and tighten the grub screw, put the lid back on and run it and listen now for any changes.
Who knows you might save some time and moola.
If it now sounds ok you will need to adjust it properly
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9th Mar 2018, 01:59 PM #19
I've heard some bad stories both here and other forums about the quality of the H&F lathes, mainly sand or grit in the headstock.
If you have owned the lathe for a while, you know what it used to sound like and what it sounds like now, maybe some sand or grit has worked it's way into the bearings down the oil holes.
They are taper bearings so should be easy to spot the problem after you remove them by inspecting the races.
It takes under a half an hour to remove the spindle, so take it out, grab the bearing part numbers or measure them.
Then if you need to use the lathe replace it while you wait for the new bearings to arrive.
My Toolex lathe I bought new in 2003, has never let me down and passed every inspection I gave it, not one sign of sand or grit anywhere and bearings are going fine.Using Tapatalk
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9th Mar 2018, 02:04 PM #20Noobster
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- Jun 2009
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- Bundaberg QLD
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- 42
Dis you mean this?lid.png If so Thanks for the tip as I Have had no problem with the apron but will now take a look at the oil in it!
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9th Mar 2018, 02:09 PM #21Noobster
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- Jun 2009
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- Bundaberg QLD
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9th Mar 2018, 03:01 PM #22Most Valued Member
- Join Date
- Aug 2011
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- Melbourne
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- 4,779
I think your lathe will have the same spindle bearings as mine.
A 30211 and a 30212 tapered roller bearings.
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
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9th Mar 2018, 03:20 PM #23Most Valued Member
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- May 2011
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- Murray Bridge S Aust.
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Before tearing the lathe apart and looking for the faulty bearing, you should be able to find any noisy bearings by the sound of it. If you have access to a mechanics stethoscope (similar to the Drs one, but with a tube instead of the round dohickey on the end), place it on the areas where the bearings are, and listen carefully. You should be able to hear a rumbling sound if the bearing is on its way out.
IF you don't have one, use a long screwdriver and place the tip of the screwdriver in the similar places above, and put your hand over the handle and your EAR pressed over the back of your hand. If any rumbling sounds are heard, that is possibly the bearing. Try this method in other areas of the headstock to accertain whether it is bearings or gear noises. As others have mentioned, the noise could be coming from the drive train somewhere.
Was it used when you bought it??
KrynTo grow old is mandatory, growing up is optional.
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