excavator king post bushes

[Topley Mike]

Hi all, I have the casting of an excavator king post here with worn pin holes. I would like to bore it out to accept off the shelf bushes. I can get the bushes in the correct size 70/85/36 but I need a hole for the locating pin to pass through one of them, will I be able to drill a steel bush?

 

[fast_st]

Carbide drill would be able to do that, not a carbide tipped but solid carbide. what size is the hole you need to drill

 

[Topley Mike]

Carbide drill would be able to do that, not a carbide tipped but solid carbide. what size is the hole you need to drill

hole in new pin 10.8 mm so clearance plus for alignment.

I have just tried drilling the casting and it drills easily (cobalt drill) with spiral swarf so if it is cast steel I may be better to weld the bore instead

 

[fast_st]

Well, that's probably true, good old fashioned line bore, weld and bore again will have you ship shape and standard size in no time.

 

[dabsfabs]

I sent you an email. If you wish to contact me Topley Mike