fuelburner
New Member
- Joined
- Oct 30, 2015
- Messages
- 4
- Reaction score
- 0
Hello,
Few months ago I finished my first engine after not been able to resist building one when got a lathe less than a year ago and its the Webster engine and runs well (Well would like to make a carb that can fuel correctly throughout the full rev range but that's for another day).
Anyways after 30 plus hours worth of running around 1000 rpm and random high rev bursts the bushes are wearing heavily.
I used SAE660 phosphor bronze bar with silver steel rod non hardened with a oil feed cup as per design and when completed there was about 0.02mm play between the bush and shaft barley noticeable and tight.
Now the crank pin and rod have lots play showing not far from now 0.1 mm play and the bush and shaft wearing evenly together. This one is lubricated with a grease cup.
The closest main bearing bush is showing signs of wear but no where near as much around 0.05mm play.
So basically my question is how can I make the bushes last longer and is this wear normal ?
Would a casehardened silver steel rod shaft and possibly pb102 bronze last twice as long or more?
Or for long hours of running am I better off using ball bearings?
Cheers for any ideas these was the first bushes I made and used a reamer for the bush and would like to sort these wear issues before building another engine.
Few months ago I finished my first engine after not been able to resist building one when got a lathe less than a year ago and its the Webster engine and runs well (Well would like to make a carb that can fuel correctly throughout the full rev range but that's for another day).
Anyways after 30 plus hours worth of running around 1000 rpm and random high rev bursts the bushes are wearing heavily.
I used SAE660 phosphor bronze bar with silver steel rod non hardened with a oil feed cup as per design and when completed there was about 0.02mm play between the bush and shaft barley noticeable and tight.
Now the crank pin and rod have lots play showing not far from now 0.1 mm play and the bush and shaft wearing evenly together. This one is lubricated with a grease cup.
The closest main bearing bush is showing signs of wear but no where near as much around 0.05mm play.
So basically my question is how can I make the bushes last longer and is this wear normal ?
Would a casehardened silver steel rod shaft and possibly pb102 bronze last twice as long or more?
Or for long hours of running am I better off using ball bearings?
Cheers for any ideas these was the first bushes I made and used a reamer for the bush and would like to sort these wear issues before building another engine.