On Sunday, 21 June 2020 13:25:30 UTC+1, Lee Nowell wrote:
Hi all,

I have had a set of hair clippers for years but hardly ever used them. In the current lockdown I dug them out but they struggle to cut any hair at all despite the blades seemingly working ok. After a bit of searching I found some videos saying you sharpen them by rubbing the flat surface on a sharpening stone. Unfortunately this didn't seem to do the trick either. Given the blades seem to vibrate horizontally, I would have thought that to sharpen them you would have to make the sides of the "fingers" of the blades sharp rather than the front edge.

Anyone have any experience of doing this or an idea about what else I could try?

They are sharpened by dissembling and grinding the two flat faces flat.
It fails to cut because of wear on the teeth.
It can be done on a sheet of glass with an abrasive paste.
It's a lot of work a lot of metal has to come off.