I have a ‘Derwent’ hand crank desk sharpener from the Derwent pencil co in Keswick.
One of these….
https://www.derwentart.com/en-gb/p/2302001/professional-products/accessories/super-point-manual-desk-sharpener
Bought when son was at school, the chore of sharpening dozens of pencils on a weekly basis with the usual small hand held sharpener was the driver. Had it for years and always good points and no lead breakage ( assuming it’s a reasonable quality pencil to start with ).
Also should add…. They work with a multi blade roller so it’s a shaving action which is much kinder to the pencil than the single blade hand held sharpeners….