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WhatsApp: +86 18203695377WEBJan 10, 2022 · Bridgeport mills have ball bearings with preload. Not like a jig borer, but some preload. Unless you run 3 or 4000 rpm, you do not need thin oil. If you use ISO32 oil and the spindle does not get hot, this is just fine. If you are running 3 to 4000 rpm and using tiny end mills or drills, and the spindle is getting hot to the touch, then maybe ...
WhatsApp: +86 18203695377WEBFeb 13, 2021 · The kwhr/ton requirement in pulverization which has no correction for differences in fineness produced, ranged from to for the ball mill and from to kwhr/ton for the hammermill. Pulverization of the lignite from the Indianhead mine in the hammermill is again the exception; this required kwhr/ton.
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