Thread: Bronze bush. What type of bronze?

Hi Guys,
First I don't have one of these gearboxes, though I have used one in the past.
Looking at Rays picture I've been thinking its really only the gears you are using that need the oil, some gears may never be used?
Would there be room to run a small brass line on the side of the selector so it oils the top gear? or am I solving a problem that doesn't exist?
You'll still have to look after the bearings of course.

Stuart

Bingo! I had the same thought yesterday. Was looking at drilking a small hole through the centre...

Simon

Just be careful it won't weaken it and make bigger problem.
Stuarts idea of having it on the side might be better.

Dave

Something else I have been thinking about for my mill auto oiler but could work for you as well, is a car clutch master cylinder with a larger reservoir.
You could set it up in the cabinet or somewhere and have multiple lines coming from it to all oiling points. It could be either spring loaded so you pulled it out and it slowly went back in, or could even be close to the ground and foot operated so you just step on it each time you start the lathe for the day.

Dave

Bugger me! Thats another great idea. Would never have thought of that..

Cheers,
Simon

Thats all the commercial one shot oilers are, but they have the cylinder in the tank.
They use numbered meters at the end of each line so each place gets the right amount of oil instead of it going the easiest route. These could be made up yourself out of brass (old outside tap handles) pressed into the end of the tube and drill a small hole to suit.
There are drill bits available from around 0.3mm so you would have to experiment a little to get it right, but if you started small you can always open them up.

I bought a few sets of 0.3 to 1.6mm drill sets of a guy on ebay recently for $9 posted here in Aus.
eBay Australia: Buy new & used fashion, electronics & home d
They look to be OK but are not gold like in the picture, just plain HSS.


Dave

G'Day Fellas,
Just checked my gearbox (torch & mirror) and all gears turn all the time regardless of ratio. But I must admit you had me thinking about it for a few minutes. The drive from the upper input shaft goes to to L.H. gear which is keyed to the shaft from then on all gears freewheel except for the output cluster which is keyed to the shaft. Before I drilled the extra oil holes I did consider a 20 mm tube across the gearbox with an external filler plug and holes above each gear but being a lazy old bugger chose the easy option.
Regards,
Martin

Originally Posted by toolman49

G'Day Fellas,
Just checked my gearbox (torch & mirror) and all gears turn all the time regardless of ratio. But I must admit you had me thinking about it for a few minutes. The drive from the upper input shaft goes to to L.H. gear which is keyed to the shaft from then on all gears freewheel except for the output cluster which is keyed to the shaft. Before I drilled the extra oil holes I did consider a 20 mm tube across the gearbox with an external filler plug and holes above each gear but being a lazy old bugger chose the easy option.
Regards,
Martin

HI MARTIN,

My gearbox is the same set up. The freewheeling gears are each individually bushed. With mine, the first 4 or 5 gears will not receive oil from the selectors because they are not in contact with the selector gear. They are a small and large gear combination that meshes with another shaft of gears that the selector gear runs off.

So, I was considering individual oil points for those gears and as for the selector, the other option I have come up with is an oil point from above (as with the other shafts/gears) but connected to the oil point underneath (inside the gearbox) will be a small flexible tube that is attached or cable tied to the slector gear with the end appropriately directed onto either the large or small selector gear. That way, no matter which gear is selected, when oiling is done it will always find the selector gears and therefore the gears being used at the time.

Cheers,

Simon