Setup-Checklist

I use a fixed setup checklist for every deep hole drilling job. It takes five minutes to run through and has prevented more scrapped parts than any other process control I have implemented. A cold machine, a dirty bushing, or a clogged coolant line will ruin a part faster than any programming mistake. Step 1: Machine Warm-Up I run the spindle at operating speed with coolant circulating for at least 30 minutes before starting a job. A cold machine does not drill straight holes because the spindle, headstock, and bed expand as they warm up. ...