PSA: A guy in the shop told me my coolant mix was way too weak for the aluminum job

David Young · 2026-03-11T19:45:04.827936+00:00

He said 'you're just making steam, not cutting' and I had to admit he was right. Switched to a 10% mix and the finish looks way better now, anyone else run into this?

miller.rowan7mo ago

Switched to a stronger mix and it stopped the chatter immediately.

1

mia7007mo ago

Saw my buddy burn through three endmills before checking his coolant.

0

kimr747mo ago

Ever think about how old your coolant might be?

0

jades467mo ago

My coolant turned to sludge last winter and wrecked a pump. Now I write the change date on the reservoir with a paint pen. It's a cheap fix for a stupid problem.

1