that would explain why it wont knock out at least, if those bushes are threaded.I presume there are bushes in both ends of the tube .
Drill a hole in the middle part of the tube and fill it with WD40 rust remover or simular to work from inside
View attachment 139965
Probably the 2nd of the 3 items shown under the "Buy it with" listing I linked earlier.WD40 does also have special rust penatration liquid
Its very uncomman that there is thread in that kind of bushes
ive ordered someProbably the 2nd of the 3 items shown under the "Buy it with" listing I linked earlier.


thats amazing, thank you so much.Hi - I replaced the pivot bolt with one a fraction thicker , on my original C.M.1.8 polar mount many years ago .. mine was not sized as yours is .. but because of "wear" causing too much play in the pivot. ... (see pictures of the old bolt below ) I don,t recall any bushes in the tube - the mount is strong - but basic.
I think plenty of heat .... (large blowtorch) or oxy - acetylene torch ... and heavy impact will get it ... if the penetrating fluid wont do the job ... I,m also a fan of Plus Gas for seized parts.
View attachment 139966View attachment 139967
If it is stuck the hard way the end you are hitting on will expend and making things worseWhy the madness to save the bolt.Cut off its head and knock out the bolt.