Bosch 0603011100 Review

Most saws are specialists. A circular saw powers through long straight cuts with speed and precision. A mitre saw delivers perfectly angled crosscuts on timber and moulding. A table saw handles repeatable rip cuts with millimetre accuracy. But none of them can follow a curve, cut a sink opening out of a worktop, scribe a worktop to an uneven wall, or navigate the tight internal corners of a cut-out for a socket box. For that, you need a different kind of saw entirely — one that trades the rigid blade of a circular saw for a thin, reciprocating blade that cuts on the upstroke and can change direction mid-cut. The jigsaw is the shape-shifter of the saw world. It is the tool you reach for when the line is not straight and the material is not uniform. A good jigsaw combines a powerful motor that maintains blade speed under load, a pendulum action that adjusts the aggressiveness of the cut to match the material, and a blade change system that does not require tools or patience. Cordless models add the freedom to take the saw to the workpiece rather than the other way around — invaluable when you are cutting installed worktops, flooring, or sheet material that is too large to bring to a bench.

Bosch's green-cased Universal range is designed to bring professional engineering principles to the home DIY market at accessible prices, and the UniversalSaw 18V-100 is a textbook example. It is a bare tool — sold without a battery or charger — which makes it particularly attractive if you already own batteries from Bosch's 18 V Power for All system. The key specifications for any jigsaw are the cutting depth capacity in wood and metal, which determine the maximum material thickness the tool can handle; the no-load stroke rate, which governs cutting speed; and the pendulum action settings, which control how aggressively the blade moves forward into the material on each stroke. A 4-position pendulum system, as found on this model, lets you dial from a fine, slow cut for precise curves to an aggressive setting for fast straight cuts in thick timber.

In this review we take the UniversalSaw 18V-100 through its paces across the materials and cuts a home DIYer is most likely to encounter: curved cuts in worktops and shelving, straight cuts in chipboard and plywood, metal cutting in thin steel and aluminium, and the all-important scribing of worktops to uneven walls. We assess the SDS blade change system, the effectiveness of the pendulum settings, the battery runtime on a single charge, and the practical value of the included accessories — protective cover, shatter guard, and cut control base. We also consider how this cordless jigsaw compares to corded alternatives and to more expensive models from Bosch's Professional blue range.

The Bosch UniversalSaw 18V-100 is an 18-volt cordless jigsaw designed as a bare tool — it ships without a battery or charger, relying on compatibility with any battery from Bosch's 18 V Power for All system. The motor delivers a variable stroke rate of 0 to 2,600 strokes per minute via a progressive trigger, giving you full control from a slow, careful start through to maximum cutting speed. Cutting capacity is rated at 100 millimetres in wood — enough to cut through a standard kitchen worktop or a solid timber joist — and 8 millimetres in steel, with an additional rating of 18 millimetres in aluminium. On a single 2.5 Ah battery charge, Bosch claims approximately 16 metres of cutting in 18-millimetre chipboard, which translates to enough runtime for a typical day of home DIY without needing to swap batteries. The 4-position pendulum action is the defining performance feature: set to zero for fine, splinter-free scroll cuts, or crank it up to position four for fast, aggressive straight cutting where speed matters more than edge finish.

Bosch has equipped the UniversalSaw 18V-100 with several features that directly improve the cutting experience. The SDS (Bosch's proprietary tool-free blade change system) lets you eject and insert jigsaw blades with a single lever movement — no Allen key, no screwdriver, no struggling with a hot blade after a long cut. This is particularly valuable when you are alternating between a coarse blade for fast wood cutting and a fine metal blade for cutting aluminium trim or thin steel sheet. The soft-start feature ramps the motor up gradually rather than jerking the blade into motion, which helps you place the cut accurately and reduces the risk of the blade wandering across the surface before it bites. The variable-speed trigger gives you progressive control — squeeze lightly for a slow stroke rate on delicate materials or when starting a plunge cut, and pull fully for maximum speed on long straight runs. A lock-on button keeps the saw running during extended cuts without needing to hold the trigger.

Handling the UniversalSaw 18V-100 reveals a tool that Bosch has clearly designed with the home user's most common tasks in mind. At 1.6 kilograms without a battery — roughly 2.1 kilograms with a 2.5 Ah pack fitted — it is light enough for one-handed operation on vertical cuts and overhead work, yet has enough mass to sit steadily on the workpiece without chattering. The cut control base provides a clear sightline to the blade and helps keep the saw square to the surface, which is critical for straight cuts and bevel cuts up to 45 degrees. The shatter guard device is a transparent plastic shield that sits in front of the blade, reducing splintering on the top surface of the cut — particularly useful when cutting veneered boards, laminate worktops, or faced plywood where a rough top edge would be visible in the finished project. A protective pad fits between the base plate and the workpiece to prevent the metal shoe from scratching delicate surfaces like pre-finished worktops or painted panels.

The included accessories reflect Bosch's understanding of what a jigsaw user actually needs to get started. The kit includes two T144D blades — a general-purpose wood cutting blade that handles most home sawing tasks from shelving to flooring. The protective cover, shatter guard, cut control base, and protective pad are all included rather than being sold as expensive optional extras, which is refreshing at this price point. The saw ships in cardboard carton packaging rather than a carry case, which keeps the price down but means you will need to find your own storage solution. The tool is compatible with T-shank jigsaw blades, the industry standard, giving you access to a vast range of aftermarket blades for cutting everything from plastics and laminates to ceramic tiles and fibreglass — the right blade transforms what the saw can do.

The UniversalSaw 18V-100 measures a compact body length and weighs 1.6 kilograms without the battery. Bosch manufactures the tool in Hungary and backs it with a 2-year manufacturer warranty. Customer feedback is strongly positive — it holds a 4.5 out of 5 stars rating from 438 reviews, ranking at number 21 in the Jig Saws bestseller category on Amazon. At approximately £57 as a bare tool, it is one of the most affordable cordless jigsaws from a major brand. However, the total cost of ownership needs to factor in a battery and charger if you do not already own Bosch 18 V batteries — a starter kit with a battery and charger will add approximately £40 to £60 to the initial outlay. For existing Bosch Power for All users, it is an outstanding value addition to the tool collection.

The Bosch UniversalSaw 18V-100 is the ideal cordless jigsaw for home DIYers and renovators who already own Bosch 18 V batteries and need a versatile, affordable saw for curved cuts, worktop scribing, and general household cutting tasks, accepting the bare-tool format and cardboard packaging in exchange for a very competitive price.