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Just glad I tried them out first before starting on an expensive piece of stainless.Ī waste of money. Code: AK4701 Sealey Cobalt Drill Bit Set 19pc MetricHigh speed steel with 5 Cobalt makes these ideal for drilling extra hard materials. I suppose at my age I should have known better than to purchase a set of Cobalt drills for £25 when well-known brands were going for twice the price. The case may be metal but here is gaping hole in the top (so you can see there are drills inside?) which allows the smaller drills to come out unle ss a great deal of care is taken during transport. So I can only conclude that these are very poor quality or there is a manufacturing fault. Find many great new & used options and get the best deals for sealey ak-4701 cobalt drill bit set 19-pc metric at the best online prices at eBay Free shipping for many products. Yes, I may have bent one or two but never snapped any but the smallest diameters. I have never in my life snapped drills of this size (I've been using drills for more than 40 years). Drills can be resharpened without affecting their performance. 135° Split point tip enables bits to bite workpiece quickly, reducing the need for centre mark. Fully ground HSS with 5 Cobalt makes these ideal for drilling extra hard materials. To my astonishment, both drills snapped where the plain shank meets the fluting. Sealey AK4701 HSS Cobalt Split Point Fully Ground Drill Bit Set 19pc Metric. I was using a DeWalt cordless drill and controlling the speed and feed carefully. Tried 5.5 mm and 6 mm diameters to enlarge a pilot hole through a piece of bronze only 12 mm thick. Sealey Back Sealey Power Tools Sealey Air Power Tools Sealey Compressors Sealey Welding & Cutting Sealey Machine Shop Sealey Power Tool Accessories. Features: Fully ground HSS with 5 Cobalt makes these ideal for drilling. HSS Jobber Drill Bits - "Jobber" is a standard of length, and bits made to this specification are ideal for general purpose applications in handheld drills and stationary machines.Bought this set primarily for drilling Stainless Steel but thought I'd try them out on something easier first. Sealey Ak4701 Cobalt Drill Bit Set 19Pc Metric View Details.HSS-CO Drill Bits - CO stands for Cobalt, an additive that provides increased resistance to heat and wear, making these bits suitable for tougher applications. Fully ground HSS with 5 Cobalt makes these ideal for drilling extra hard materials.HSS-TiN Drill Bits - TiN stands for Titanium Nitride, a coating that is applied with the intention of reducing friction on the bit, normally identifiable by a metallic yellow colouring.HSS-G Drill Bits - HSS-G drill bits are ground, and typically provide better performance than HSS-R bits although they are usually more expensive too. They are not considered to be as high quality as HSS-G bits. Rolled HSS drill bits are amongst the cheapest drill bits to manufacture and consequently they are usually cheap to buy too. HSS-R Drill Bits - the "R" stands for Roll Forged. Sealey AK4701 HSS Cobalt Split Point Fully Ground Drill Bit Set 19pc Metric.Learn more 18+, T&C apply, Credit subject to status. There are quite a few designations of HSS drill bit most of these refer to the manufacturing techniques used to make them. Sealey AK4701 - Cobalt Drill Bit Set 19pc Metric Make 3 payments of 19.66. They were developed specifically for drilling into metal but they can also be used to good effect on lots of other common materials, including wood and plastic. HSS Drill Bits Information HSS drill bits (high speed steel drill bits) are the most numerous and versatile drill bits available.
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