cuts quickly and uses less battery power on your cordless. It is less accurate than a fluted bit, but that may not be an issue when laying a cable through a joist that will be covered by a floor for example. Really demanding drilling is in concrete and masonry in general. I always buy the best that I can afford because nothing wastes your time and guarantees vibration and near hearing loss than using a poor quality masonry drill bit.
The IRWIN Joran SpeedHammer Plus brand has been widely accepted in the trade as a top brand, but some engineered changes have made these SDS bits even
better. With an enhanced carbide content in the tip and a clever flute design, it drills even better. The carbide tip allows the user to drill into reinforced concrete with no fear that the tip will break or deviate from its path – it simply drills through the rebar. The delineated flute design clears waste from the tip very quickly, reducing heat and prolonging tip life. While I wasn’t able to test the bit to its full capability, I did try the rebar test and experienced no problems except that I need a more powerful SDS drill to take advantage of these new bits. On a more mundane note, I used the bits in a small 14.4v cordless SDS drill to put up some shelves onto hard concrete blocks and I was amazed at how quickly the job was done – each hole took only tens of seconds to do instead of minutes. For non-SDS users a similar set of masonry bits is available. From what I could see the tip design is very nearly the same as the SDS SpeedHammer design but with a slightly steeper tip angle. Again they have a well-defined fluting pattern and drilling standard face bricks was really no problem – better with a corded drill though for obvious reasons.
IRWIN has also noted that the trade nowadays use mainly cordless drills so have included a range of multi-purpose bits designed for use at a lower rev range than normally possible with a corded drill. Uniquely, these bits have a four-facet diamond-ground tip that cuts easily and clears waste quickly. The bits are designed to drill wood, plastic, ceramic tiles and brick, so a general tradesman need only have one bit set in his toolbox. I have used these bits very successfully in the trials of two house moves, to put up shelves in my workshops etc and they work very well. They wouldn’t be my first choice for drilling accurately in wood, but for general hard work there seems to be no other competitor on the market.
All of the above drill bits are available in a variety of sets that have been chosen to cover the most popular sizes needed. There are occasionally offers instore and this is a good time to stock up as these IRWIN bits are very good at what they are supposed to do. As they are also trade rated, demanding DIYers can be assured that they will last well despite hard use, so should reduce the number of useless blunt drills in household toolboxes!
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ToolBUSINESS+HIRE 9
Reply No. 214
Reply No. 207
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