I'm trying to sort out some oil leaks on the headstock of my 'new' DSG lathe, there are leaks from around two shafts where they enter the headstock.
One is the 'overdrive' shaft which has a straightforward open bearing & separate Weston lip seal. The bearing is a bit noisy anyway, so I've ordered new bearing and seal.
The other leak is from the 'No1 shaft' (input shaft), this relies only on a 'sealed one side' (neoprene seal) ball bearing to keep the oil in.
Question is, is this a 'normal' arrangement, or is it being a bit optimistic to expect the integral seal to be adequate for that job? It's near the oil level, and there is a *lot* of oil flying around when the spindle is engaged, though to be fair there is another (open) ball bearing between this one and the 'main action'.
Subsidiary question, as single seal bearings are twice the price of double sealed, so the way to do it is buy a double sealed unit and knock out one seal, what if I put in a double sealed bearing? That would presumably reduce any leakage, but how long could I expect the bearing to last without a free supply of oil? It's running at 1200 rpm all the time that the lathe is switched on, 6308 bearing, carries the (substantial) tension of the main L16 Polyvee drive belt.
Thanks
Tim
One is the 'overdrive' shaft which has a straightforward open bearing & separate Weston lip seal. The bearing is a bit noisy anyway, so I've ordered new bearing and seal.
The other leak is from the 'No1 shaft' (input shaft), this relies only on a 'sealed one side' (neoprene seal) ball bearing to keep the oil in.
Question is, is this a 'normal' arrangement, or is it being a bit optimistic to expect the integral seal to be adequate for that job? It's near the oil level, and there is a *lot* of oil flying around when the spindle is engaged, though to be fair there is another (open) ball bearing between this one and the 'main action'.
Subsidiary question, as single seal bearings are twice the price of double sealed, so the way to do it is buy a double sealed unit and knock out one seal, what if I put in a double sealed bearing? That would presumably reduce any leakage, but how long could I expect the bearing to last without a free supply of oil? It's running at 1200 rpm all the time that the lathe is switched on, 6308 bearing, carries the (substantial) tension of the main L16 Polyvee drive belt.
Thanks
Tim
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