That's not bronze. It was my desperate attempt to heat it up. It's steel oxidation. Oven temperature was 450F for 1.5 hours with 180C measured by touch on the gear. The shaft was about 32F during pressing. Apparently pressing action was not instant and gear did not slip right away (and I had to...
I cannot pull it back and measure exact inner diameter .jpg] http://files.engineering.com/getfile.aspx?folder=a33222f5-6e45-4c53-8569-e480d5ad0d05&file=1124142142a[1].jpg
Roughly shaft is a tube with 48mm at the interference point and 20mm inner hole.
I tried to put gear from my auto transmission on a shaft with pre-heating using small 20T press. It goes only 50%. May I simply use cold huge press 150T to put it back?
