Bosch GKS 18V-51 18v Cordless Brushless Circular Saw 140mm
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Bosch GKS 18V-51 18v Cordless Brushless Circular Saw 140mm
The Bosch GKS 18V-51 is an 18V cordless brushless circular saw designed for carpenters and site workers who need freedom of movement without sacrificing cutting performance.
Powered by a brushless motor running at up to 6,300rpm, this compact saw handles cross-cutting timber, ripping plywood and OSB boards, and making bevel cuts with a maximum cutting depth of 51mm at 90° and 35mm at 45°. The 140mm blade diameter keeps the overall size manageable without compromising on capacity for everyday joinery and boarding tasks.
Weighing just 2.2kg without the battery, the GKS 18V-51 is genuinely easy to carry and manoeuvre on site. The ergonomic handle, soft-start function, and automatic blade brake all contribute to confident, controlled cutting throughout the working day. An integrated dust blower keeps the cut line visible at all times, while the improved dust extraction port helps maintain a cleaner workspace — particularly useful when working in confined areas or under COSHH considerations.
Features and Benefits:
• 18V brushless motor delivers efficient, powerful cutting with up to 6,300rpm no-load speed
• Compact and lightweight design at 2.2kg (excl. battery) for easy single-handed carrying
• Soft-start and automatic brake functions for smooth, controlled operation
• Dust blower keeps the cutting line clearly visible during use
• Improved dust extraction port design for a cleaner work environment
• LED light illuminates the work area, including awkward or dimly lit corners
• Bevel cutting capability up to 45° for versatile timber applications
Specifications:
Battery voltage: 18V
No-load speed: 5,800 – 6,300rpm
Saw blade diameter: 140mm
Saw blade bore diameter: 20mm
Max. cutting capacity at 90°: 51mm
Max. cutting capacity at 45°: 35mm
Weight (excl. battery): 2.2kg
Net weight (incl. battery): 3.1kg
Sound pressure level: 96dB(A)
Sound power level: 104dB(A)
Noise uncertainty K: 3dB
Vibration emission (wood sawing): 1.700 m/s²
Vibration uncertainty K: 1.500 m/s²
Length: 328mm
Width: 160mm
Height: 158mm
Contents:
1 x circular saw blade, Eco for Wood, 140mm x 1.8/1.1 x 20mm, 30T (2 608 844 565)
Battery AH Explained
The best way to describe battery amp hour is that this is effectively the size of your fuel tank, the more amp hours your battery has then the longer the battery will last between charges. More amp hours does not increase the power of a given tool.
Battery Voltage Explained
A tool with a higher voltage than another is a bit like choosing an engine in a car, the higher voltage will generally mean higher power & performance. As with cars though a bigger engine does not always translate to better performance so it is important to compare the specifications of tools at different voltages between different manufacturers.
Specifications
More Help
If you require more information or assistance with this product please consult the links below :
There is a Bosch Professional manufacturer warranty for this product which covers all manufacturing defects for the normal lifetime of the tool but does not cover wear and tear or damaged cause by misuse. This does not affect your statutory rights. For more details see <a href='/bosch-professional-warranty/warranty/120/' style='margin: 0; padding: 0;'><strong>Bosch Professional Warranty</strong></a>.
Get help regarding Bosch GKS 18V-51 18v Cordless Brushless Circular Saw 140mm
For any technical enquiries relating to this product it is best to call the manufacturer, Bosch Professional, direct on 0344 736 0109.
For any other queries relating to ordering this item, stock availability, existing orders or returning faulty items etc please contact us at Tooled-Up at sales@tooled-up.com or call on 020 8805 3535.