I suspect the bolt concerned was unusually tough and the drill bit appears to be high quality - hence giving 4 stars - but I was a bit disappointed the cobalt drill bit didn't complete the job this time. Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. We started exhibiting at model engineering exhibitions in 1994 and realised from the shows that people wanted quite specialised tooling for their machines and also a wide range of tooling which they could adapt to suit their needs. RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice.

Manufactured to DIN338 standards, with a 135 degree split point tip for drilling without pre-centring.When I get my bench and bench grinder out of my hall cupboard later this year, I shall attempt to sharpen. Suitable for drilling high alloy content steels and metals with tensile strengths over 1000 N/mm² like heat and acid proof steels and stainless steel. Drill bit colour : polished Suitable for drilling in alloyed and unalloyed steel up to a tensile strength of 900 N/mm2, cast steel, cast iron, sintered iron, temperate iron, non-ferrous metals and hard plastics. I blunted it yesterday after my 16th hole in mild steel sheet (re-drilled 6mm holes to hold casters).

As major international supplier, Dormer insist on its products surpassing all relevant independant performance standards.

These precision-ground drill bits enable up to 40% faster drilling and up to 50% lower feed pressure than standard-ground HSS drill bits with a chisel edge. Made from cobalt alloy, these drill bit are highly durable and heat resistant providing extended the life of the drill bit.

The THUNDERWEB design is characterised by a conical shaped web which gets thicker towards the back of the drill bit. Designed as a twisted drill bit, these attachments guarantee excellent performance and will be an asset to your application. The added 5% Cobalt improves the red hardness (heat resistance) of the drill bit and results in significantly extended life. As an example, a mechanic drill bit will have a much shorter flute and therefore have a much smaller overall length. Flatter twist angle creates smaller chippings, ideal for drilling harder steels ie: stainless steel.The Irwin Metric HSS Cobalt Drill Bits are perfect for drilling stainless steel and other high alloys. Precise response when positioning the bit due to its split point and 135° point angle as well as excellent dimensional accuracy also characterize this drill bit. For the best outcome, please provide detailed courier instructions and a contact number that we can pass on to the courier.

This generally means the length of the entire drill bit itself is significantly longer for diameter it has. stainless steel, for extremely high-risk and corrosive environments such as swimming pools – designed to fix sheeting and cladding to timber, light and heavy steel. I used this to drill through a Shimano MTB bicycle crank bolt after it had defeated my cheap metal drill bit. Stainless steel self-drilling screws for fixing sheeting and cladding - both cold and hot rolled steel up to 25mm thick, in a range of colours and head styles, including hex, low profile, and lacquered. Precision engineered steel drill bits, with 5% cobalt shaft, for use on tough materials and hard steel, including stainless steel.Metal drill bits ground from solid extremely heat resistant cobalt-alloyed high speed steel produced according to DIN 338. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards; they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too. diameter EXTREME 2„¢ Metal Drill Bits are suitable for portable drilling of steel, alloyed and non-alloyed up to 900 N/mm2. right-hand cutting twist drill bit, type N, drill bit tip 136 degrees, split point manufactured to DIN 1412 C, diameter tolerance h 8. We do this to ensure our couriers deliver to the right person at the right address, to ensure your goods are not lost or stolen.