I'm typically hanging out with the Neanderthals, but currently working on restoring a 1966 Wilton vise and need some help. One of the inner parts had a broken pin I need to drill out and replace. I assume the part is cast iron, but not sure what the pin is made from. The hole size is 3/32". I've tried HSS and Irwin Cobalt. I've tried speeds from 570 to 1390. Barely a dimple. Photos below show the minimal progress and a look at the pin from the inside. Any suggestions would be appreciated. If you need any further photos or info, please let me know.
Thank you!
photo 1.JPGphoto 2.JPG