Working on front bolster on a tractor. A casting of some type cast steel is my assumption. Started out with a twisted off bolt drilled off center (not me) 10X1.50MM. Tried the washer and nut weld method numerous times. Decided to drill and try easy out have some of the fluted ones, no success there.
Next was drill for helicoil, did not seem to have troubles drilling but now am unable to tap. As I start tap it is breaking the teeth off the tap. Have I hardened the cast some way and how can I get around it. TIA Tom
Next was drill for helicoil, did not seem to have troubles drilling but now am unable to tap. As I start tap it is breaking the teeth off the tap. Have I hardened the cast some way and how can I get around it. TIA Tom