Runout checks and limits

[Ahmed Agrody]

Dears Gents

i have urgent question , i have agitator upper shaft [ OD is 160 mm , length is 2 m ] which is connected to hollow shaft gear reducer with torque arm and supported with self aligning roller bearings and connected to bottom shaft [5m] by coupling , currently we have excessive gearbox wobbling and torque arm bolt is stretching too much due that movement . i expected could be related to agitator shaft runout or bottom bush high clearance , i stopped the machine and checked the runout on top and bottom area , i found max runout is 0.2 mm on upper shaft [ area between gland packing and main bearing housing]. runout at bearing area and at gearbox area are very low less than 0.03 .based on shaft length and diameter is it acceptable or not and do we have standards for runout acceptance limits

I attached agitator drawings for clarifications.

 

[3DDave]

Unfortunately the forum software doesn't recognize punctuation in file names so while it uploads, it cannot download. Change the name to something like example.pdf It especially fails with "&" and "(" and ")"

 

[Ahmed Agrody]

I edited the file name so it can be downloaded

 

[Ahmed Agrody]

here is agitator drawings