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3rd Sep 2021, 01:42 PM #46Most Valued Member
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3rd Sep 2021, 04:16 PM #47Gear expert in training
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Bit late to the party, but we use Hyspin 68 AWS on everything with the old machines at work with no issues; even a 2000 RPM Swiss hobbing spindle with tapered plain bearings that the book says should get ISO 15.
Gear cutting specialists and general engineers www.hardmanbros.com.au
Fine pitch gear cutting from 0.1 Module www.rigear.com.au
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4th Jun 2023, 08:02 PM #48Novice
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- Jan 2014
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- Perth, Western Australia
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- 18
Headstock bearing lubrication system - AR9
A question please for everyone about the intended function of the AR9 headstock roller bearing lubrication system.
The diagram below is a cross section of the outboard bearing of a 260, but the lubrication arrangement is the same as my AR9.
Oil is introduced via the oilers to location 'A'. It finds its way to the outboard side of the bearing 'D' via drilled holes 'B' and a small relief 'C' at the 6 o'clock position in the bearing cap casting 107. The oil level at 'A' and 'D' are then the same.
To my question then: Unless the bearing cap 107 metal-to-metal seal at 'E' is pretty good, the oil will simply drain away at 'E'. This is what mine does within a day or so. Is this what the designer intended?
Mine has no gasket under the bearing caps and no such item appears in the Spare Parts Manual indicating that gaskets were not intended by the designer.
I'm considering installing a paper gasket to slow the loss.
What are members' thoughts and experience please. Thanks All.
Hercus_260_Headstock_cr.jpg
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4th Jun 2023, 10:25 PM #49
A thread about oil. With a question.
Older lathes were designed for a total loss lubrication system and there is no intention in the design to retain the oil.
With all due respect: these old girls love to leak
The oil also helps moving debris away from precision surfaces. In some cases a pressurized oil gun is required to flush oil through the nozzles into the groves till we actually see oil starting to move/drip.
On my Myford S7 every time I life the cover I see a small puddle under the headstock.
I just oil when I need to run the lathe and after I am done. If not in use which has been fairly rare for a month to go by, I just put a few drops here n there for safe measure.
Some people have designed their own 1-shot oil system for their lathes but I find doesn’t really solve the problem of leakage.
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