HSS Drills any one know good quality make

[the pict]

I am about 3/4 the way through a trailer build all stick welded, and now I am attaching lash points etc I bought a well known diy brand but got 2 x 8mm holes and its knackered I know I can be a bit heavy handed at times but come on 2 holes, so I am looking for what my Granddad used to call blacksmith standard they were bloody dear back in the day so heaven knows what they will be now but advice is welcome
Pict

 

[Strima]

Any decent brand will do, not Erbauer or Titan etc.

A good drill speed, not too fast with a decent amount of pressure and most importantly some lube on the bit. Keep it cool and just munch your way through.

Combi drill on a slow speed setting works well, if it starts squealing it's got hot and is too late.

 

[the pict]

I am just a ham fisted hammer jockey at times thanks for the reminder about taking the time to take my time

 

[Andy78]

Presto HSS jobbers are worth a try for a durable bit.

 

[rsgaz]

Cobalt bits are the best IMHO.
And get "split point" bits if you are not drilling a pilot hole first.

Anyway, you have welding equipment, a workshop/garage I assume, and yet, you don't have one of these?...

https://4.imimg.com/data4/PU/XN/ETO-3847996/bench-grinder-----flexible-shaft-grinder-500x500.jpg

 

[the pict]

I have a grinder but I have never mastered the art of sharpening bits

 

[multimick]

when i worked at british aerospace we used cobalt drills on titanium,no problem,,but now back down to earth bosch bits aare pretty good

 

[static zap]

I have a grinder but I have never mastered the art of sharpening bits

Nothing like practice ..if you fancy going for a wander !
(I cheat and demmel them thinner at flutes)
... where you have welded may have hardened a bit ..

 

[telectrix]

sod cheap cobalt bits. the cobalt is only a couple of microns and they wear out faster than a tart drops her knickers. this is the sort of thing you need.not cheap though.
Dormer HSS-Tin 1mm to 13mm, 25 piece Jobber Drill Set | A095204 | RS Components - https://uk.rs-online.com/web/p/products/7947666/?grossPrice=Y&cm_mmc=UK-PLA-DS3A-_-google-_-PLA_UK_EN_Tools-_-Power_Tool_Accessories_And_Drill_Bits%7CDrill_Bit_Sets-_-PRODUCT+GROUP&matchtype=&gclid=CjwKCAjwhLHaBRAGEiwAHCgG3rKsu-vV4_zqup3Ul1TC5aMaZZbif3oITOS8EjYpu1L4yKA6yLnU3hoCFYkQAvD_BwE&gclsrc=aw.ds

 

[rsgaz]

the cobalt is only a couple of microns

Cobalt bits are not 'cobalt plated'. The cobalt is mixed into the metal. (8% for HSS-Co drill bits)

 

[telectrix]

not with that crap i bought off ebay. 1 hole and knackerd.

 

[Andy78]

For cheap cobalt bits, I find the toolstation ones pretty good.

 

[multimick]

i used to drill titanium 10 mm thick with a 14mm cobalt drill,no pilot hole , no problem, air drill

 

[mattg4321]

Go slow and use lube.

This applies to things other than the topic of this thread

 

[telectrix]

Go slow and use lube.

This applies to things other than the topic of this thread

regarding your things other..... down in the SE you probably use KY.up here in the barbarian North we use axle grease.

 

[LankyWill]

regarding your things other..... down in the SE you probably use KY.up here in the barbarian North we use axle grease.

Thats extravagant for you Northerners, i thought you used tears?

 

[telectrix]

Thats extravagant for you Northerners, i thought you used tears?

that's only for oral.

 

[the pict]

Yes old axle grease with grit in

 

[telectrix]

Yes old axle grease with grit in

you bloody scots just have to get rid of the grit from Hadrian's Wall that you broke. don't you? .

 

[LewisM]

We use tungsten carbide drill bits at work for drilling out stainless steel and titanium fasteners, only problem they cost a lot.

 

[JK-Electrical]

I am about 3/4 the way through a trailer build all stick welded, and now I am attaching lash points etc I bought a well known diy brand but got 2 x 8mm holes and its knackered I know I can be a bit heavy handed at times but come on 2 holes, so I am looking for what my Granddad used to call blacksmith standard they were bloody dear back in the day so heaven knows what they will be now but advice is welcome
Pict

I would suggest that you consider investing in a 13-piece DeWalt DT7920B Extreme Drill Bit Set. I bought a set 18 months ago and have been well-pleased with their performance.

 

[Deleted member 26818]

I have a grinder but I have never mastered the art of sharpening bits

Can get a stand which will hold drill bits at the correct angle for sharpening them on bench grinders.
May have to change wheels.
I would go for Dormer, Goliath or SnapOn for HSS bits.

 

[Paul P]

I agree with using Dormer drill bits and use cutting compound and they will really last.

 

[Marvo]

We get Somta drill bits locally, also FEW (French Engineering Works), they're not the cheapest but they're both very good but I'm not sure if either brand are available in the UK.

 

[Chris1234]

Don’t buy from UK Drills, they are terrible.

I used to own a machine shop, 8% cobalt are good, if you are only drilling shallow holes then use stubs drills.

I used to buy from ‘CNCPOORBOY’ on eBay, I’ve bought an M5 spiral point tap just a hour ago. Look for cobalt stub drills.
And use a good tapping/cutting compound to extend the life of the drill bit.

Carbide is too brittle for a hand drill, it won’t last and side movement. Even dropping them will shatter them!

 

[Bobster]

I would suggest that you consider investing in a 13-piece DeWalt DT7920B Extreme Drill Bit Set. I bought a set 18 months ago and have been well-pleased with their performance.

I can also recommend these. Last ages.

However, if you're drilling a hole through anything less than 1.5mm steel with anything larger than 6mm in the set. They bite that hard going through that it'll deform the metal and try to take your wrist with it.

 

[Chris1234]

The problem with dewalt ones is that if you drill a hole and you then need to make it larger, you can’t.

 

[solarsavings]

My set don't know that.

 

[rsgaz]

if you drill a hole and you then need to make it larger, you can’t.

Could you explain further please, I really don't get that?

That would only happen with badly re-sharpened bits which don't have a relief clearance angle. They come from the factory with that, surely?

 

[Chris1234]

They don’t have the standard angled tip, probably easiest with a picture:

 

[rsgaz]

Aaaahhhh, them particular ones!!!

I thought you were making a general statement about all Dewalt HSS drills. I see now, thanks.