Recommended interference fit for 3000 RPM Generator couplings 5

[edison123]

I have a 3000 RPM, 18 MW generator with the shaft dia of 228 mm at the coupling seating area. The rigid coupling (with a flange and a hub) has four circumferential round key pins and four radial round key pins. All the eight key pins equally spaced around the circumference. What would be the recommended bore dia for this coupling?

I have seen interference values from 0.003 to 0.00075 inches per inch of shaft diameter being recommended for keyed couplings. Any tips from end users?

Muthu

http://www.edison.co.in

 

[edison123]

Thanks. Redrilling and reaming those distorted axial key holes is going to be our next nightmare. But one step at a time.

Muthu

http://www.edison.co.in