Coolant Sampling and Testing Procedures
Why Regular Coolant Testing Matters In deep hole drilling, the coolant does double duty: it lubricates the cutting zone and flushes chips out of the bore. Contaminated or degraded coolant fails at both tasks. I test the coolant weekly using a standard procedure that takes about 5 minutes per machine. The time is well spent when it prevents a coolant-related tool failure or part rejection. I have traced problems including poor surface finish, accelerated tool wear, and bacterial stink all to coolant that had drifted outside specification. In each case, the weekly test would have caught the issue days or weeks before it affected production. ...