large, thin walled brass bushings; how its made? 2

[justbabak]

does anybody know the process for making large brass bushes (say 450mm diameter) and thin walled (about 10mm thickness)? the quality is a must, so no defects and pit holes, and the part will be machined afterwards to high finish and tight tolerances.
this bush is used as a taper lock device for installing rolls on shafts and will experience very large torques and stress on this thin wall.
any idea?

 

[arunmrao]

You can centrifugally cast them with adequate allowance and then machine. No defects are encountered,if the liquid metal is clean.

 

[ornerynorsk]

Make (cast, buy, fabricate, etc) oversize, fixture on the OD in order to machine the ID, then fixture on a mandrel to machine the OD.

 

[Mr168]

How about flow forming?

 

[saberblue]

Depending on the volume why not machine them from a solid?

 

[Jetmugg]

Centrifugal casting is a common method for manufacturing tubular brass/bronze bushings. If necessary, external flanges can be integrally cast.

 

[Wrenchbender]

Ditto on centrifugal casting. We had success with a 90Cu-10Ni alloy about 450mm diameter, 50 mm wall, and 135 length.

 

[btrueblood]

3rd ditto for c'fugal casting.

...so, the LPS goes to...arunmrao!