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Thread: Metalmaster AL330A Owners
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23rd Dec 2018, 10:36 PM #46Philomath in training
- Join Date
- Oct 2011
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- Norwood-ish, Adelaide
- Age
- 59
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- 6,561
The detents (if they are from the camlock) are actually located in the spindle on the machine. If you look at a camlock spindle, a little way around from the square sockets are screws. Undo those and the detents should be behind them. If they are missing it should not be a major deal as their main purpose is to hold the cams in the 'unlock' position when unlocked so that the spindle can be turned without the cams falling back into place and making it more difficult to remove a chuck.
Michael
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23rd Dec 2018, 10:54 PM #47
IF the problem is a bent pinion spindle-it is the pinion that engages the rack under the longitudinal ways- it will be possibly caused when the flat cover spring shielding the feed screw - pops out of its socket sitting forward of where it should be.
When the lathe is used on auto feed, the spring compresses-( and then, if out of its true postion) becomes an incompressible solid and the lathe crashes against it to SAVE the 20 cent shear pin and thereby bending the pinion.
If you can manage to move the travel wheel at all, it will be tight then loose then tight again as the carriage moves.Thats the dead giveaway.
It is an absolute B of a job to remove the shear pin, move the carriage and then remove the pinion.Then the carriage has to be moved to the RH end on the ways to enable the one piece pinion and shaft to be removed as it can only be removed that way.
My lathe pinion was available as a spare - it was a 11 tooth - pinion shaft was 16mm diam x 120.5mm long including pinion gear. Pinion gear length itself is 31mm.
The spare supplied was not drilled. From memory the shear pin was tapered.
It is possibly a maybe or a could be, but worth checking out. I did a write up around ten years or so back and posted with pics on the forum but I think it was lost in a programe crash. I have attached a photo taken at the time,viewed from the top, with the lid removed from the apron.The apron had been eased off the lathe .You can see the amount of bend in the pinion spindle by the uneven gap between lathe body and pinion.
I sincerely hope for you and your mate, that this is not the case and the cause is something else and simple to fix.
Cheers
Grahame
Lathe travel pinion 2.jpg
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24th Dec 2018, 06:56 AM #48Senior Member
- Join Date
- Dec 2010
- Location
- Syd
- Posts
- 492
Wow that's annoying, everything disappeared somehow.....and two goes to get this up now too!
Originally Posted by Michael G
Originally Posted by Graham Collins
H&F seemed remarkably unenthusiastic last time about support, hopefully if it is that, not a huge pita to obtain!
Thankfully I'm away today, no need to concern myself with dismantling the thing just yet, I've told him not to be rash with hammers and chisels, if he does get a rush of blood.
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24th Dec 2018, 11:28 AM #49Most Valued Member
- Join Date
- Jul 2010
- Location
- Melbourne
- Posts
- 9,088
Except they also hold the cams in the spindle, so do not run the lathe without a chuck on or the cams may remove themselves.
Hunch, A few long shots first, I'd try loosening the two bolts on the bottom of the apron that hold the bracket for the worm gear on the power feed shaft and see if that improves things. If that doesn't do it try removing the two bolts that hold the FWD/REV lever to the side of the apron(this may drain the gearbox). If that still doesn't free it up, its time to pull the shafts out and drop the apron off as I don't think you can get at all the front "gib*" bolts while its on and at least then you'll know if the problem is in the apron or the carriage. Its a pretty quick job and I'm guessing far quicker if there are two people.
p.s. It would appear somewhere along the line that someone has scraped the cross slide.
pretty sure my lathe has a hole going to the back bearing, but that wouldnt seem to be an issue.
*I say gib but I'm not so sure they are technically gibs. "the plates that stop the carriage lifting and are used for the carriage lock" them things
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29th Dec 2018, 09:20 PM #50Senior Member
- Join Date
- Dec 2010
- Location
- Syd
- Posts
- 492
Back in town - not too happy to go into an airless nook in a shed that's likely mid 40s at the moment....have to wait for a southerly before I venture back there.
Good tips on possible shortcuts there! Yes, might be a stretch to call the things on the saddle gibs.....was a trifle surprised with the scraping on something from China, mentioned it to the owner, he just gave a quizzical look and shrugged.
Bill.
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30th Mar 2019, 11:16 AM #51Senior Member
- Join Date
- Dec 2010
- Location
- Syd
- Posts
- 492
As a follow up, did fix the stiffness a couple of months back. It was simply because the carriage handwheel vernier was on back to front and somehow binding it up. The spring detents were reinstalled, not sure why you'd remove them in the first place as it makes finding the spot where the camlocks disengage a bit of a pita.
H&F didn't seem at all interested in support of these things the other day, but there was a bit of a throng at the counter with the sale, so my mate will likely go via grizzly if his Chinese source doesn't come good.
Tailstock is NLA, but a G4002 model will work apparently for just over $200US if he's prepared to wait a couple of months. https://www.grizzly.com/parts/Grizzl...STOCK/P4002704 Oddly the G4003 "gunsmithing lathe", which you would think is the brother of this machine, the tailstock there is over 500 bucks, can't imagine what would bump the price that much! https://www.grizzly.com/parts/Grizzl...BLY/P4003G0701
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26th Jan 2020, 12:41 PM #52human termite
- Join Date
- Jul 2007
- Location
- sandstone point queensland
- Age
- 69
- Posts
- 182
Al330a
picked this one up a couple of weeks ago,wasnt going to but another lathe but the price and condition of it was too good to let go ,came with steadies ,4 jaw chuck,gears tooling .stand ,even a lot of stock .all the books etc.....bob, its now in place ,up and running in my shed
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26th Jan 2020, 12:54 PM #53Most Valued Member
- Join Date
- Jun 2007
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- sydney ( st marys )
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- 64
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- 4,890
Is this just a buy and sell type thing or have you been incorrectly diagnosed.
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27th Jan 2020, 08:41 AM #54Senior Member
- Join Date
- Dec 2010
- Location
- Syd
- Posts
- 492
Nice condition, odd the apron isn't painted!
The wooden addition to the swarf tray is for a leaks out of the apron or just making it easier to clean? The height of those knobs, I would have thought would interfere with the engage lever - in a feed condition at least. A mate limited the total loss oiling system on his with a 10mm dowty seal after teflon tape, copper washers and o rings all failed to do the job.
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27th Jan 2020, 09:02 AM #55human termite
- Join Date
- Jul 2007
- Location
- sandstone point queensland
- Age
- 69
- Posts
- 182
makes it very easy to clean, slide it to the right then pull out,straight into bin,the knobs are nowhere near the feed lever the photo make it look that way ,and dont get oil leak (yet) and what is odd about aprin not painted? , this is what they came like,well most of them as far as I can see,the one that started this post isnt painted
...bob
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