tonyjeffs wrote:
I've just knackered a £12 sds drill bit after one session, cutting a
big hole in a wall for a wc waste,
Usually, I dip a bit in cold water occasionally in such circumstances,
but i got lazy and was impressed the way that SDS bits are slow to get
hot.

I'd take the bit back & whinge if I were you, even a cheapo should last one
hole.

Anyway
Tips on sharpening drill bits generally? angle, ordinary hammer, SDS
Many of the sds bits have a sort of nipple on the end, almost a bell
or bobble hat shape - is that important ?
I generally try and sharpen things dangerously with an angle grinder -
a stone takes forever.
Can I maybe buy a bit sharpening machine?

I can't be arsed to sharped drill bits, a new bit costs less than the time
it takes to sharpen it.

SDS - I bought a cordless P drill from B&Q. £50. It is quiet,
determined, very good. The disadvantage is that the new battery lasts
for about one 20 minute job. This worries me that after a few months,
the batteries will need changing ever five minutes. So perhaps corded
is better.

£50 is cheap for a cordless combi drill. I think you got what you paid for.
When you pay the extra for DeWalt/Makita/Bosch you get much better quality
batteries & chargers.


--
Dave - The Medway Handyman
www.medwayhandyman.co.uk