Just bought my first water cooled spindle. 1.5 kW from UGRACNC. Also bought a small pump and two radiators (figuring that I'd use only one). Naturally all the tubing connectors are different. The connectors on the spindle itself appear to be "push to connect". The connectors to the water pump are barbed and measure about 5/16" and the connectors on the radiators are also barbed but measure about 1/4". The water pump came with two clamps to secure tubing to its connectors.
I see a real potential for a disaster if I make a tubing connection that fails. The spilled coolant won't be great but a burned up spindle will be even worse.
I would sure appreciate suggestions and photos of successfull tubing connections. I'm also confused about what would be the best coolant.
Thanks. Don
Here's some photos: