Is this drill bit (see link) for masonry?

[Quest-O]

Is this drill bit for masonry? (It looks a bit too pointy.)

[fred]

In article , Quest-O writes

lasted well, pointy bit & all.

[Donwill]

Looks like a worn wood bit to me. Don

[John]

I can't see a carbide tip.

[cynic]

I came across a bloke "sharpening" a drill bit for steel the other day. He had made the tip pointed like a spear and the cutting edges were completely useless. I took it off him and sharpened it properly as my old metalwork master taught us years ago. Is drill sharpening a dying art because of our throwaway society?

[Bruce]

Faced with a flood of cheap goods from China, just about every skill you can think of is a dying art.

[NT]

Very much. I resharpen HSS bits to steeper angles for wood use, and am quite used ot being told it cant be done and wont work!

NT

[dennis]

Maybe he wanted to clean his nails?

[geoff]

In message , Bruce writes

That's why peoples' eyes light up when they come into my factory we actually DO something

I get comments like"I didn't realise that places like this still exist "

[Bruce]

Interesting ... what do you make, or do?

[Dave]

It certainly looks like it, but they would have baulked at a bit of steel that I had to drill some many years ago by hand.

In the list of hardness of a twist drill

1 shed twist drills made out of chalk, or cheese. 2 HSS twist drills that are quite good. If ground right. 3 Cobalt twist drills that are better. 4 C1150 twist drills that are even harder and better. 5 D200 twist drills which are even better still. and finally 6 Solid tungsten carbide drills that will drill through most very hard metals.

Unfortunately, I have had problems finding the C1150 and D200 drills.

Using a D200 2.5 mm twist drill, I had to go and grind it every 3 holes it drilled. You couldn't see anything wrong with the cutting edge, but it would just rub the steel instead of cutting it.

Dave

[Dave]

What sort of product do you produce, please.

Dave

[geoff]

We repair fans and pcbs for central heating boilers mainly, but turn our hand to various other related things

[Dave]

Yes, there is a correct angle for drilling all sorts of materials. With wood, you have to make sure that the twist drill does not corkscrew itself into the wood and become jammed. Similar with copper.

Dave

[geoff]

[Dave]

It would be easier and safer to use a scalpel.

Dave

[Bruce]

Thanks.

[The Medway Handyman]

A living :-)

My last job was working for a Danish company. When you visited the factory the first thing you could smell was the lubricant used on the cutting tools. Was it called 'suds'?

Haven't come across that smell in the UK for ages.

[Dave]

I can see the reason for the comments now :-) It's usually something from the past, is that trade. I always try to repair, if possible. Currently, I have a power shower pump in bits, hoping that I can get it working again. All it needs is another set of brushes, but I can't see how they come out.

DIY rules here :-)

Dave

[Dave]

Oh! Many thanks for asking that, I will go to bed with a spinning brain now and no, the wife is away for about 10 days.

Dave