How do they sharpen pencils.... in mass? High speed, mass quantity?

I don't think that pencils are sharpened at the factory with a regular pencil sharpener... it would take forever. I want to know how they, pencil makers, sharpen thousands of pencils.

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Belt sanders. I've seen it done on one of the "How its made " programmes.

...detailed in the programme, also visible for a glimpse at about the 8 second mark.
. Learn something new every day. I would have guessed that they used something similar to the spiral cutters in old-style hand-crank sharpeners. Thanks for the link.
leave it to ze germans to have such an elegant engineering solution. I'm sure there are the planetary cutter style used industrially somewhere... :)
Very interesting!
5:09 into the video.

The pencils roll along so that all sides are sanded off evenly.