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I've had a Bosch GSR Li-2 Cordless Drill driver for several years now. Okay so the name isn't very snazzy but this device is aimed at the semi-professional / professional market. Bosch colour code their devices according to build quality and design.
Bosch power tools that are coloured green are aimed at consumers or mainstream DIY'ers. Although build quality is good the overall design, tolerances and components have been specified to keep costs low. Anecdotal evidence on the web suggest the design aim is for 20 hours use, this is based on the average DIY'er doing six hours continuous work per year. Now I have many green Bosch devices and I don't think one has broken yet.
Bosch blue power tools are the performance range, the components and design are aimed at the professional user that will expect to use the tool day in, day out for years. Of course it also means the Bosch blue range is more expensive. For example, anecdotal evidence on the web suggests the blue range can survive much higher drop tests than the green range.
So why did I buy a GSR 10.8V Li-2 as I'm not a professional tradesman? Well in short because I have learnt over the years to do a job right and easily requires the best tool for the job. Two main selling points attracted me to this drill:
- Compact size and weight; from nose to tip this drill / driver is 210mm long and weighs just over 1Kg, including battery (note to self, stop using the kitchen scales to weigh non-food stuff)
- The battery is Li-ion which means it is small, powerful, holds its charge and recharges quickly (45 minutes from flat until fully charged, 75% charge in 15 minutes)
I bought this because I wanted a drill driver for those awkward spaces, drilling above your head, drilling in cabinets, drilling between joists. All of these jobs, whether drilling or screw driving can be a major effort (or turn the air blue in my case). The Bosch GSR Li-2 appeared to fit the bill.
###Li-Ion over NiMH Battery Technology###
Without turning this into a science lesson older cordless drills use Nickel Metal Hydride and characteristically these are larger and heavier than the newer Lithium Ion batteries. From the perspective of power tools it basically means that for the same power Li-Ion batteries are much smaller, last longer between charging (up to twice as long), can be recharged more times (5 times more), don't suffer from "memory effect" where the battery thinks it is charged more than it actually is. The downside of Li-ion is they are significantly more expensive.
As this is a professional tool what do looks matter I hear you say? Well first impressions are that this is a quality piece of engineering. The body is a combination of heavy duty blue plastic, rubberised grips and metal. The chuck mechanism is very solid with positive clicks between each of the 20 torque settings. The chuck teeth are metal and the rotating mechanism to release or grip drills and bits is easy to use. Bits or drills are held securely in the teeth of the drill by rotating the chuck shaft with a twisting, tightening action.
The GSR 10.8 Li-2 sits very well in your hand, it is finely balanced and your hand naturally curls around the drill. The main weight is taken on top of the thumb and first finger and transferred into the hand, wrist and arm. The drill feels very natural sitting with the rubber grip in the webbing of your hand and your fingers curled around the vertical shaft, also rubberised, which houses the Li-Ion battery and graduated trigger. (If anyone makes any rude comments about this description I'll remind you this is supposed to be a serious review!)
Other controls are fairly minimal as this is a device where function rules over form. The directional control is next to the trigger and is pretty easy to push from one side or the other to change direction of rotation. On top of the drill is a speed control which is either one or two, former slow speeds, latter high speeds.
The drill is very easy and good to use. The torque controls allow very fine tuning so that the screw can be tightened to a set depth or tightness, drilling should be done without torque control which is the final setting on the torque collar. Changing bits and drills is pretty easy and fast with the keyless chuck that I've previously mentioned above. The final feature is a LED light that I've found more useful than I initially thought. As the device is designed to work in small confined areas, these are also likely to be dark so the LED light can be extremely helpful for locating the right area to drill or the screw.
I've had my GSR Li- 2 for several years and pretty much every time I do some DIY it is by my side, cosmetically it is scratched and a little dusty. However, the number of times I've dropped it onto concrete, soil, floorboards I'm impressed it still works let alone a few minor scratches. The drill is good for wood, metal, low / medium density block and small holes in brick. The screw driver is excellent as speed and torque can be finely tuned; forgot to mention the trigger allows for very gradual control over the screwing speed based on how hard you squeeze it. One thing to be aware of is that if you are spending this much on a drill/driver then get a high quality set of bits. Cheap bits will slip and chew up especially from a device that has as much torque as the GSR 10.8 Li-2
The Bosch GSR 10.8 Li-2 is an excellent piece of engineering that is invaluable for any serious DIY work. If you can justify the initial expense it will last a lifetime and prove exceptionally useful. I have no hesitation in recommending this product.
N.B - the version I bought a few years ago included a canvass carry case, GSR 10.8v Li-2 drill and Li-Ion battery, Li-Ion charger, wood drills, metal drills and set of screw bits. All in all this was a very neat suite of products. The 10.8V battery fits in other Bosch Blue products with this voltage i.e. GLI 10.8V - LI Torch.
* Torque, max. (hard screwdriving applications) 30 Nm
* Torque, max. (soft screwdriving applications) 13 Nm
* No-load speed (1st gear/2nd gear) 0 - 350 / 1.300 rpm
* Chuck jaw width, min./max. 1 / 10 mm
* Battery voltage 10,8 V
* Weight incl. battery 0,95 kg
* Torque settings 20+1
* Length 169,0 mm
* Max. drilling diameter in wood 19 mm
* Max. drilling diameter in steel 10 mm
* Max. screw diameter 7 mm
* Multiple gears
* Forward/reverse operation
* LED Light
* Measured values determined according to EN 60745.
Total vibration values (vector sum of three directions)
Drilling in metal
* Vibration emission value ah 2,5 m/s²
* Uncertainty K 1,5 m/s²
* Vibration emission value ah 2,5 m/s²
* Uncertainty K 1,5 m/s²
Originally published on Ciao under my ID - Sussex_Paul