Bosch GBH 18V-26 SDS Plus Drill Review – Tested and Rated for UK Buyers

The Bosch GBH 18V-26 stands out in the 18V SDS Plus class for one specific reason: its 2.6J impact energy is the highest available in the standard 18V SDS Plus format, outpunching the DeWalt DCH273 at 2.1J and the Milwaukee M18 BLHX at 2.0J by a meaningful margin. That extra impact energy translates directly into faster drilling through harder materials – dense aggregate blockwork, reinforced concrete slabs and engineering brick that will slow competing 18V SDS drills noticeably are handled by the GBH 18V-26 with considerably less effort. For anyone whose work regularly involves harder UK construction materials, that energy advantage is the headline reason to choose the Bosch.

We tested the GBH 18V-26 alongside the DeWalt DCH273 and Milwaukee M18 BLHX on a matched set of masonry tasks to establish whether the 2.6J impact energy delivers measurable real-world advantages, how the Bosch Professional 18V battery platform compares to the DeWalt XR and Milwaukee M18 ecosystems, and whether the price premium over the DeWalt and Milwaukee alternatives is justified for UK buyers.

Overview and first impressions

The GBH 18V-26 is larger and heavier than the DCH273 and M18 BLHX – at 2.7kg body only it is 400g heavier than the DeWalt, which is noticeable in overhead work and confined spaces. The extra weight is a direct consequence of the more powerful motor and heavier hammer mechanism required to deliver the 2.6J impact energy, and is an acceptable trade-off for the majority of trade users who value drilling performance over compact dimensions. The build quality is exactly what Bosch Professional users expect – the blue housing is solid and robust, the grip areas are well padded and the overall feel is of a tool built to absorb years of site use.

The three-mode selector is operated by a rotating collar that moves smoothly between drilling, hammer drilling and chisel-only modes. Like the DeWalt, the Bosch’s mode selector is positive and stays in position under vibration. The bit change mechanism is the standard SDS Plus spring-loaded collar – fast and reliable. One detail that stands out is the integrated LED worklight, which comes on automatically when the trigger is pressed and provides useful illumination in the confined locations where SDS drilling often happens. It is a small addition but a practically useful one.

Specifications and scores

How it performed in testing

The 2.6J impact energy advantage is immediately apparent when drilling into hard aggregate blockwork. Where the DeWalt DCH273 requires noticeably more forward pressure and produces more vibration in dense material, the GBH 18V-26 drives through with a confidence that reflects its extra hammer power. Holes in medium-density concrete blocks that took the DCH273 approximately 8 seconds each were completed by the Bosch in around 5-6 seconds – a consistent 25-35% speed advantage in the harder materials. In standard brick the difference is smaller and less practically significant, but in harder materials it is unmistakable.

The chisel mode performance is similarly enhanced by the higher impact energy. Mortar removal for repointing is noticeably faster than with 2.0-2.1J alternatives, and the GBH 18V-26 is genuinely capable for light chiselling tasks that would be marginal work for the DCH273 or M18 BLHX. It is still not an SDS Max breaker and should not be mistaken for one, but the 2.6J energy extends the practical upper limit of what a standard 18V SDS Plus drill can reasonably accomplish.

The vibration level is the main handling trade-off. The heavier hammer mechanism that delivers the 2.6J energy transmits more vibration to the hand than the lighter 2.0-2.1J competitors, particularly in sustained drilling sessions through dense material. Bosch’s anti-vibration system does useful work here and the vibration is within normal acceptable limits for professional SDS use, but users sensitive to vibration or doing very long sustained sessions should factor this into their choice.

Battery and runtime

The GBH 18V-26 runs on Bosch Professional’s 18V battery platform. This is a large ecosystem covering the full Bosch Professional blue range – combi drills, impact drivers, jigsaws, circular saws and many more tools all share the same 18V batteries. For UK tradespeople already using Bosch Professional tools the compatibility is a significant advantage, and the platform is well established enough that batteries and chargers are widely available and competitively priced.

Performance and limitations

The GBH 18V-26’s performance advantage over competing 18V SDS Plus drills is real and meaningful in the applications where it matters. For anyone regularly drilling into dense blockwork, aggregate concrete or hard stone, the extra 0.5J of impact energy over the DeWalt DCH273 and 0.6J over the Milwaukee M18 BLHX is the difference between a comfortable tool for the task and one that is working at its limit. For standard brick and softer blockwork – the majority of domestic fixing tasks in UK houses – the advantage is smaller and may not justify the additional weight and cost.

The weight trade-off is the honest limitation. At 2.7kg body only – rising to approximately 3.3kg with a 4Ah battery fitted – the GBH 18V-26 is noticeably heavier than the DCH273 in hand. Overhead drilling, working in confined loft spaces and extended sessions on a stepladder all feel this difference. For a tradesperson drilling primarily at waist height or below this is a minor consideration. For an electrician or plumber doing frequent overhead work in tight spaces, the lighter DeWalt or Milwaukee may be the more practical daily tool despite the lower impact energy.

Final verdict – is it worth it?

The Bosch GBH 18V-26 is the most powerful standard 18V SDS Plus drill available in the UK market and it earns that status through a measurable, real-world performance advantage in the materials that matter. If dense blockwork, aggregate concrete and hard stone are a regular part of your work, the 2.6J impact energy is the deciding factor and the Bosch is the straightforward answer. No other 18V SDS Plus drill in this price range will drill through hard materials as quickly or as comfortably.

The trade-offs are honest and predictable. It is heavier than the DeWalt DCH273 and Milwaukee M18 BLHX, it costs more, and its energy advantage is less meaningful in standard brick – which is the majority of the masonry in most UK domestic properties. For a tradesperson whose daily work involves harder construction materials, these are acceptable trade-offs. For a homeowner whose masonry work is primarily fixing shelves and hanging pictures in standard brick walls, the DCH273 or M18 BLHX would serve equally well at lower cost and lighter weight.

For existing Bosch Professional 18V users there is no contest – the GBH 18V-26 is the obvious SDS choice within the platform. For those starting fresh or switching from DeWalt XR or Milwaukee M18, the platform investment needs to be factored carefully against the performance benefit.