8/30/2023 0 Comments Drill ukWe recently reviewed the best corded hammer drills in the UK. However, their relative simplicity also means hammer drills are more affordable. On a hammer drill, the entire chuck moves back and forth, and this YouTube video demonstrates the resulting difference in performance. Sprung ball bearings in the slots holding the bit in place provide a fluid back-and-forth impact which accentuates the power of the spinning drill bit and minimises (or eliminates) any need for physical force to be applied. The latter - which we’re reviewing here - are more sophisticated in that only the drill bit moves back and forth when additional force is needed to create holes or remove masonry. Rotary Hammer vs Standard HammerĪnother important distinction to make at this point is the difference between a standard hammer drill and a rotary hammer. The latter effectively replaced the original design, though it’s worth noting both SDS and SDS Plus machines share the same 10mm shank. Still, Bosch has spent almost half a century developing both SDS and the more recent SDS Plus. Other manufacturers have adopted and adapted similar technology in their way. Bosch invented SDS technology, and their Professional GBH 2-20 D is a fine piece of hardware, ticking most DIY boxes for under £100.Īdmittedly, Bosch has an advantage in this market since they introduced Stecken Drehen Sichern (Insert Twist Secure, also referred to as Special Direct System in English-speaking countries) in the mid-1970s. The differences between the leading corded SDS hammer drills are significant, but there’s one product on sale which offers the best blend of performance and value. Almost twice the weight of its smaller siblingīest Corded SDS Hammer Drill in the UK - 2023 Comparison Table Model Most significantly, 3.1J of impact energy in hammer drill mode makes light work of even the hardest surfaces. The GBH 3-28 DFR also has better weight distribution than its sibling and incorporates vibration control technology to reduce the level of chassis shake.īosch promises equal power in forward and reverse rotations, with impressive chisel performance compared to rival products. This device runs at 900 RPM, with a quick-change chuck for faster bit switching mid-job. For many people, the differences won’t justify that additional outlay. You must delve deeper into the 3-28 spec sheet to see where the extra money goes. However, this model has additional rubber mounting and foam padding to cushion vibrations. Both are drawn from Bosch’s Professional range, accept a similar range of SDS Plus accessories, and are mains-powered with near-identical front handle grips. ProsĪt first glance, it’s hard to see why the GBH 3-28 is almost three times the price of its GBH 2-20 stablemate. Our main criticism involves the slippery front handle, which has no ridges or grooves and sits too close to the body to be entirely comfortable during use. Like its competitors, the Einhell has a special carry case, while it additionally comes with ten drill bits and two chisel heads for insertion into the keyed chuck.Ĭapable of generating 3.0 joules of impact force, this is a powerful and practical piece of kit. Anyone prone to aching biceps using heavy-duty tools like an SDS hammer drill should look elsewhere. Yet its low price isn’t matched by its weight this is a heavy and tiring machine to use at almost four kilograms. One thing in the Einhell’s favour is its price - it’s the cheapest of our three contenders. It’s an in-betweener, with its impact energy and RPM falling midway between the Bosch models. When you study its technical specifications, it’s no surprise that Einhell’s TC-RH 900 is in the middle of our results table. The compact 323mm length makes it easy to use in confined spaces You can only use SDS bits unless you buy a separate adaptor Long-time users describe the Bosch Professional GBH 2-20 D as a balanced compromise between weight, power, durability and value. This makes the GBH 2-20 D easy to use for long periods.Īdmittedly, its maximum power is a modest 650 watts, but it delivers an impressive impact rate of 4,200 BPM.Īn overload clutch prevents the machine from burning out, while forward and reverse rotation enables jammed bits or debris to be easily dislodged and removed. Weighing just 2kg, it’s almost half the weight of our other shortlisted dills. The GBH 2-20 D supports core cutters of up to 68mm in diameter and metal holes of up to 13mm, while it can drill through concrete to a diameter of 20mm. Costing less than £100 at the time of writing, Bosch’s Professional GBH 2-20 D should be sufficient for most tradespeople and DIYers.
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