The Shop > Tools
Mini-Lathe woes
Darren:
Hi David, here's the puller kit for the 7x12,
Nothing more than a couple of tubes, a few spacers (of which you only need about two of) and some bolts.
Cost me $152 + £22 import duty, oh, that inc the gears.
The bearing No' 30206JR for the inner race and 30206 J-N for the outer race. Those No's are all you need for any bearing supplier.
You do of course need two sets.
The spacer you need to modify is already on the lathe. I managed to shorten mine on my lathe before fitting it. When you get to that part you will realise what I mean. It's part of the bushing at the back of the spindle just under the pre-load nut. Just lathe it with no pre-load. Easy cos it's plastic, if it where metal I doubt you could do it without another lathe.
I had no choice at the time as I only had one lathe.
Hope this helps
Darren
cedge:
David
Good time to consider an upgrade to metal gears. Here ( https://thehobbyistmachinestore.com/catalog/proddetail.php?prod=HS0001 )is where I bought my metal change gears and the quality was very good and customer service was excellent. You can get all the gears for a mini mill for $128.00 plus shipping. Not too bad in my book.
Steve
Darren:
Nice link Steve,
Did you find they made any difference?
BTW, they are out of stock...shame... :doh:
Twinsquirrel:
Thanks guys, will bang off an email to both suppliers and see when they are likely to get re-stocked.
Darren,
The bush to be machined is the one between the pre-load nut and the inner-race is that right? Did the taper bearings make a big difference?
A very quick search gave me this cup and cone set http://simplybearings.co.uk/shop/p47169/30206+Metric+Taper+Roller+Bearing+30x62x17.3mm/product_info.html Not sure whether this is the right one so I will go into my local place on monday and have a chat.
Thanks again
David
cedge:
Darren
I only purchased the change gears for the thread cutting. No particular difference noted, but the added sense of security. The mini lathe is designed to allow the motor pulley to fail first, in most cases. It almost acts as a "fuse"in the gear train. I'd suspect a bit of previous stress was the cause of the failure of your main gears. I've managed to explode that little pulley about 3 times but never had a gear failure on the mini lathe.
You can also get the metal gears from Little Machine Shop and Micromark, which probably explains the why of the out of stock issue. Until very recently, this guy was the only place to get them. Still might be worthwhile to contact him.
Steve
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