Bosch GCM 8 SJL Compound Mitre Saw archive

Wednesday 8 May 2013

Derek Jones looks at the Bosch GCM 8 SJL compound mitre saw, a very portable size machine which is also very versatile



By now there's got to be a mitre saw on the market to suit every end user and once you've established your budget and specific requirements, what's left to make you choose one machine over another? This compact machine is well spec'd for a start with all the usual features like a trenching facility, a good range of presets in bevel and mitre mode and extending table either side of the turntable. The working area goes from 440mm wide to 740mm and with a cut stroke of 300mm, it's got plenty of capacity. Mitres between 50° left and 60° right and bevel cuts of -2° to 47° should cover most things.

Well machined

The working surfaces are all well machined cast aluminium without a single rough edge to be found, suggesting a build quality way above average. Both back fences are pre-drilled to make installing a break-through fence of your own fairly straightforward. Dust extraction is via two ports; the first positioned behind the blade at the source of the cut and the second behind the fence. A chip deflector helps to drive the waste material into the airflow.

In use

There is a lot of fine adjustment on this machine that will allow you to calibrate it to achieve good results in each mode. The lever cam lock used to set up for bevel cuts has a tension setting so you can adjust it to be able to nudge up to a precise angle if required. The GCM 8SJL replaces the GCM 8SJ and features an up-rated motor, now 1,600W, to cope with the increased capacity. Bosch have covered all the basics extremely well but there are a couple of nice touches that make it well worth considering; a well placed carrying handle and lens protector for the laser.

Woodworkers Institute

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F&c Verdict

I have a lifelong love-hate relationship with mitre saws; they are damn messy but infinitely versatile, so in truth, I could not do without one. This is a very portable size machine, if that is your requirement, but it could also serve you well in a smaller workshop environment. The extraction port is sized to suit only vacuum hplv – high pressure low volume – extraction and this does not clear all the dust from deep and wide cuts. Having said that, there is not a single machine on the market that will. Similarly the trenching facility is more reliable over shorter distances.

Pros & Cons

Build quality
Trenching is not a constant depth across the full width capacity

The Numbers

Power input: 1,600W
Rated speed: 5,500rpm
Saw blade diameter: 216mm
Mitre setting: 52° L/ 60° R
Bevel setting: 47° L/ 2° R
Maximum cutting capacity at 0°: 70 x 312mm
Maximum cutting capacity at 45° bevel: 70 x 214mm
Weight: 17.3kg
Price: £439