Small end bush for 600ccm.

[Edin]

Hej out there.
I have get a present,- a box with many bits of sinterbronze (self lubricating bronze)
I would like to use the bits for bearings in my Douglas engines.
Can somebody please help with advise and tell there experiense with using this material as small end bush and other bearins in a Douglas engine.

Regards Edin DK

[Doug]

Edin,

Sintered bronze, or Oilite, is usually not considered a good choice for a small end bush for a connecting rod. It does not have a high compressive strength. It is a bit like a sponge, and as the material is compressed you will get premature gudgeon pin clearance. Granted, most Dougies do not make a lot of harmful power, but they are still subject to the same inertial loadings. Usually lack of lubrication is not a problem in a Dougie engine (normally!), so the oil bearing pores of sintered bronze offer no advantage.

-Doug