My apparent good quality bits (cant remember the name) are crap... can someone recommend me a good quality set ideally 3-12mm ish?
You need some cobalt drills, expect to pay £50 for a quality set........ Osborn are good.
Found these ones to be good quality and value
http://www.toolstation.com/shop/Power+Tool+Accessories/d80/Cobalt+Drill+Bits/sd1230/Cobalt+Drill+Bit/p99309
I find just adding cutting oil makes a huge difference, even with cheapo nasty drill bits.
I use a company called Reca for all of our consumables etc including drill bits. They are very good. I've not found a HSS drill bit yet to better
them. Not the cheapest but you get what you pay for.
http://uk.reca.com/products/hss-drills.html
Lidl have done me proud. What are you cutting?
Apart from stainless the reason most drills burn out is excessive speed. The variable speed trigger on the drill is your best friend.
Stainless is slightly different. You need to take a heavy cut to avoid work hardening so squeeze the trigger fully and put your weight behind it. The
loading on the drill will slow it down.
Lubricant is not required for a sharp drill only coolant for heavy cuts.
Cheers!
Had VERY good results with Irwin stuff. Not sure on price, but certainly not cheap. I was "trialling" some for a friend who was one of their
account managers. He reckoned on demos they were never outperformed by any customers existing supplier, and we are talking big contracts.
http://www.ebay.co.uk/itm/Irwin-Pro-Drill-Set-HSCO-15-Piece-/400920187718?pt=LH_DefaultDomain_3&hash=item5d58b49346
plus 1 on the Irwin drill bits , also use De Walt , no point scrimping on cheap no name drill bits. Try Trade tool Shop , huge range , good prices and
good reviews.
http://www.tradetoolshop.com/drill-bits-holesaws/drill-bits-metal/hss-jobber-twist-drills-for-metal.html?p=6
The Irwin bit set is available on Amazon for a much lower price.
I like dormer personally. Expensive but worth the money. I've still managed to snap a couple though.
Presto are also very good.
Neither are cheap but mine have lasted about 3 years.
The ebay ones are cobalt. Amazon are only Tin coated - that is why they are cheaper.
You don't need Cobalt drills for normal mild steel work, good quality HSS drills stay sharp for ages. For harder materials cobalt drill will stay sharp for longer, but they are also more brittle.
Also learn the art of sharpening drill bits, provided you don't break one they should last almost forever.
I got some Bosch drill bits from B and Q as I had some stainless to drill. They were expensive but have stayed sharp. I always drill at as slow a speed with as much pressure as I can just using a hand held drill. I add a drop of oil for cooling aswell.
Another vote for Dormer bits - I've got 2 sets; one 0.5-6mm, and a 1-12mm set in 0.5mm increments (plus a 3.2mm and 4.8mm). Think the larger set
was around £50 and the smaller one about 20, but never had a problem with them. I've also got a set of Bosch ones that often get used/abused
lent out, as I'm less upset if/when they get broken.
I'd also recommend a drill bit sharpener, as no-one like a blunt end. It'll make them last that little bit longer in my experience.
Also re. the cobalt bits, they're very sharp and precise, but also incredibly brittle. Friend and I bought some uber expensive ones (about £20
each) when we had to drill some sheared studs off a motorbike exhaust engine, and encountered this issue. But I'm sure someone will come along
and tell me I did something wrong which caused it to break....
quote:
Originally posted by Charlie_Zetec
Also re. the cobalt bits, they're very sharp and precise, but also incredibly brittle. Friend and I bought some uber expensive ones (about £20 each) when we had to drill some sheared studs off a motorbike exhaust engine, and encountered this issue. But I'm sure someone will come along and tell me I did something wrong which caused it to break....
I bought a cobalt set from uk drills which have been good. I also bought some hss double ended stub dill bits for rivet holes, decent quality and cheap.