Intro
The circular saw is one of those tools that defines what a workshop or job site can achieve. Once you have used one to break down a full sheet of plywood into cabinet parts in minutes — straight, square, and repeatable — you wonder how you ever managed with just a jigsaw and a straight edge. A cordless circular saw takes that capability and untethers it from the wall. No extension leads trailing through sawdust, no hunting for a socket at the far end of the timber rack, no tripping over cables while you walk a saw down an 8-foot rip cut. Modern brushless motors and high-capacity lithium batteries have closed the performance gap with corded saws to the point where, for most cuts in sheet goods and construction timber, you would not know the difference — except that you can pick the saw up and take it anywhere. For the carpenter, kitchen fitter, or serious DIYer, a good cordless circular saw is not a luxury; it is the tool that lets you work the way you actually want to.
Generalities
Bosch Professional's GKS 18V-57-2 sits at the upper end of their cordless circular saw range — a brushless machine designed for professional carpenters and joiners who need reliable, accurate cutting all day. It runs on the Bosch Professional 18V battery platform, and this particular kit is the full package: two ProCORE 5.5-ampere-hour batteries, a high-power GAL 1880 HP charger, and an L-BOXX carry case — everything you need to start cutting the moment you open the box. The 165-millimetre blade and 57-millimetre cutting depth at 90 degrees put it in the versatile mid-size category that handles everything from sheet material breakdown to joist cutting.
This review looks at the GKS 18V-57-2 from the perspective of a professional user: how the brushless motor performs under load, what runtime you can expect from the ProCORE batteries, the quality of the cut and the ease of adjustment, and whether the complete kit represents good value. If you are considering moving your circular saw work from corded to cordless — or adding to your Bosch Professional 18V collection — this review covers what matters.
Description
The Bosch Professional GKS 18V-57-2 is a cordless circular saw powered by an 18-volt ProCORE lithium-ion battery from the Bosch Professional 18V System. Its brushless motor delivers the equivalent of approximately 650 watts of cutting power and spins the 165-millimetre blade at up to 5,000 revolutions per minute no-load. The blade has a 20-millimetre bore and features 54 high-speed steel teeth — a fine-tooth configuration optimised for clean crosscuts and rip cuts in timber and sheet materials. Maximum cutting depth is 57 millimetres at 90 degrees and 40 millimetres at a 45-degree bevel. The tool body weighs approximately 2.8 kilograms without a battery, and the complete kit ships in an L-BOXX 238 modular storage case.
The kit configuration is what makes this package stand out. Bosch includes not one but two ProCORE 5.5 Ah batteries — their high-performance cell technology that delivers more current and runs cooler than standard lithium-ion packs. The GAL 1880 HP charger is Bosch's high-power rapid charger, capable of bringing a depleted ProCORE battery back to 80 percent in well under an hour. With two batteries and the rapid charger, continuous operation is practical: you can drain one pack while the other charges, and the ProCORE cells maintain cutting performance right down to the last amp-hour rather than fading as the charge depletes.
In use, the GKS 18V-57-2 delivers the kind of smooth, predictable cutting action that professional carpenters expect. The 57-millimetre depth of cut at 90 degrees is enough to cut through a standard 50-millimetre worktop or double up two sheets of 18-millimetre plywood in a single pass — a genuine productivity gain on large projects. The integrated LED work light illuminates the cut line, and the blower keeps sawdust off the pencil mark so you can follow it accurately. Vibration is rated at just 2.5 metres per second squared — extremely low for a circular saw — which contributes to comfortable extended use and clean, accurate cuts. The spindle lock allows one-wrench blade changes.
The adjustment mechanisms are designed for speed and repeatability. The depth adjustment lever is large and easy to operate even with gloves on, and the bevel adjustment covers 0 to 45 degrees with positive stops at the common angles. The saw base is made from pressed steel for durability and flatness — it glides smoothly across sheet material and sits securely on narrow stock. The blade guard is smooth in operation and retracts cleanly during plunge-style cuts. A parallel guide (not included in all markets, verify with your supplier) can be fitted for repeatable rip cuts without clamping a separate straight edge.
Customer reception has been exceptional: 4.9 out of 5 stars from 23 reviews on Amazon — a near-perfect score, albeit from a modest sample size typical of premium professional tools. The saw ranks #26 in Circular Saws and sits in the top 17,000 products across DIY & Tools. The kit carries Bosch Professional's limited warranty, and the tool is manufactured to CE specifications. The vibration and noise figures (93 decibels sound power, 104 decibels sound pressure with a 3-decibel uncertainty) mean hearing protection is recommended for extended use.
Pros and cons
Pros
- Complete ready-to-work kit with two ProCORE 5.5 Ah batteries, GAL 1880 HP rapid charger, and L-BOXX case — open the box and start cutting immediately, with enough battery capacity for continuous all-day operation through hot-swapping.
- Brushless motor with ProCORE battery technology delivers consistent, corded-like cutting power from the first cut to the last — no fading as the battery depletes, no bogging down in wet or dense timber.
- Generous 57-millimetre cutting depth at 90 degrees cuts through a standard worktop or doubles up 18-millimetre sheet material in one pass — a significant productivity advantage on large installations.
- Extremely low vibration at 2.5 metres per second squared — safe for extended daily use and contributes to cleaner, more accurate cuts by reducing hand fatigue and blade wander.
- Integrated LED work light and dust blower keep the cut line clearly visible — a practical feature that improves accuracy, especially when working indoors or in poor lighting conditions.
- Part of the Bosch Professional 18V System with ProCORE compatibility — the same batteries power over 80 tools from SDS drills to angle grinders, maximising your battery investment across the entire range.
- L-BOXX 238 modular case included, integrating with Bosch's full storage system — stack and latch with other L-BOXX units for organised transport and workshop storage.
Cons
- At approximately 422 euros for the kit, this is a significant investment — justifiable for professional daily users but harder to recommend for occasional DIY use where a corded saw may offer better value.
- The 57-millimetre cutting depth, while adequate for most trade work, is shallower than a 190-millimetre blade saw — if you regularly cut 75-millimetre joists or thick stock, you will need a larger saw or make two passes.
- Customer review count is low at 23 — the 4.9-star average is excellent but comes from a small sample, so long-term reliability data across a broad user base is still accumulating.
- The saw is optimised for wood and wood-based materials — cutting metal, masonry, or fibre cement requires a specialty blade and is outside the saw's design intent, so it is not a universal cutting solution.
- At 2.8 kilograms plus a ProCORE battery (approximately 3.5 kilograms total), it is not the lightest cordless circular saw in its class — noticeable during overhead cutting or extended vertical work on wall panels.
Use cases
The Bosch Professional GKS 18V-57-2 kit is the complete cordless circular saw solution for professional carpenters, joiners, and kitchen fitters who need all-day cutting capability with the freedom of battery power.
Sheet Material Breakdown on Site
Breaking down full sheets of plywood, MDF, or OSB into cabinet parts or flooring panels is the circular saw's core job. The 57-millimetre depth handles double-stacked 18-millimetre sheets in one pass, and the dual ProCORE batteries with hot-swap capability mean you can work through a full pack of sheet material without stopping to charge.
Kitchen and Worktop Installation
Cutting worktops to length, trimming filler panels, and making sink cutouts all demand a saw that produces clean, chip-free cuts. The fine-tooth 54-tooth blade, low vibration, and precise depth adjustment make the GKS 18V-57-2 the kitchen fitter's cordless saw of choice — no cable dragging across finished worktops.
Joist, Rafter, and Framing Cuts
Cutting multiple timber joists or rafters to length on a building site without running extension leads saves time and reduces trip hazards. The cordless freedom means one less cable to manage while you move along a row of joists, and the brushless motor powers through construction-grade timber without slowing.
Flooring and Decking Installation
Laying laminate, engineered wood, or decking boards means dozens of repetitive crosscuts. The GKS 18V-57-2's smooth base plate and clear cut-line visibility let you work quickly and accurately, and the L-BOXX case keeps the saw and spare blades organised between job sites.
Building Out a Bosch Professional 18V Toolkit
If you are already committed to the Bosch Professional 18V platform, this kit adds not just a premium circular saw but also two ProCORE batteries and a rapid charger — effectively upgrading your entire cordless arsenal with higher-capacity power that benefits every tool you own.