Spindle Speed Controller Question

[JAZZCNC]

I've used high quality air cooled spindles for years with no issues, running 8-10 hours a day, 6 days a week. HSD spindles with electric fans for over 10 years at a previous job.
At my current job, we have a 10HP spindle that's cooled by the dust collection airflow. It's been running full time for over 8 years now.

I own a couple air cooled chinese spindles, but haven't used them yet to see how long they'll last.

Yes Gerry but that's not comparing Apples with apples. High quality Air cooled HSD spindle is different Animal to the cheap Air cooled what's been talked about here.
In my experience at the price level of the WC spindle NOTHING comes close to comparing and only fool would buy Air cooled at or very close to same money has WC.

[Rye]

I have a shonky Chinese 6040(any luck i'll be upgrading soon) that's falling to bits at the seems, but the 1.5kw WC ER11 spindle works a charm. Often have it running for 8 hrs solid and it only just gets warm to touch. Very quiet too - although the same can't be said for my pump(gets hot and sounds like a foghorn; anyone recommend a relatively cheap and "silent" one from ebay UK, would be grateful.) Would definitely recommend a WC over an AC - but get one with a larger collet than ER11.

[Neale]

I use a Whale submersible pump, designed as a pressure pump for fresh water for caravans, etc. Says max run time 15 mins at 12V, but I use 12V to purge the air at the start of a session then switch to 5V and it runs silently and happily for hours on end. Sits in a bucket of water and connects via cheap pvc tubing. Cost about a tenner, about 4 years ago, and still running fine.

[A_Camera]

Yes Gerry but that's not comparing Apples with apples. High quality Air cooled HSD spindle is different Animal to the cheap Air cooled what's been talked about here.
In my experience at the price level of the WC spindle NOTHING comes close to comparing and only fool would buy Air cooled at or very close to same money has WC.

Only a narrow minded fool does not understand that different people have different needs. Money is not an issue in my case, has NOTHING to do with why I prefer air cooled.