Help with cordless drills

[matt80]

Hi,

I am a bit confused by the ratings of some drills. I need a cordless drill, and was considering either a Bosch PSB 750 RES (rated at 700W) or a Bosch PSB 14.4VE2 (rated at 14v).

Why is one rated in Volts and the other in Watts? Which is best??!

Thanks!
Matt

 

[big-all]

heeelllooo mat 80

the mains one off course is 230v by 700w input power if its variable speed its likely to be about 550w output

on battery they normaly quote the voltage and somtimes the wattage
in general higher the battery volts higher the output with a 30% or40% reduction for cheeper makes
look at nm rating higher the more tork although this is often achived by lower gearing hence slower working on lighter work

 

[matt80]

I know the PSB model is a hammer drill - does that make it likely that its more "effective" than the other one, regardless of power?

 

[big-all]

what general use do you want to put it to

 

[matt80]

General sort of use, I might want to drill masonary but not very often. Plaster and wood mainly I guess - mostly interior.

I know cordless ones arent as good as corded ones, but one thing I do want to do is convert all the sockets/light switches from surface-mounted to flush... which I guess means I'll need to disconnect the power in order to drill into the plaster...

 

[chappers]

The most important thing is the combination of volts and the amphours of the battery this gives the energy capacity.
Which can be used to either give higher torque or more battery life or a combinbation of the two.
To work out the watthours multiply your voltage by the amphour capacity of your drill.
So a 15.4 volt drill with a 3.5amphour battery will store more energy than a 18volt one with 2.6amphour battery.
The heaviers the drilling you want to do the higher the watt hours you need also the longer you will be able to go between charging for easier tasks.

GET A PANASONIC

 

[big-all]

I know cordless ones arent as good as corded ones, but one thing I do want to do is convert all the sockets/light switches from surface-mounted to flush... which I guess means I'll need to disconnect the power in order to drill into the plaster...

for your purposes a decent battery drill is as good as a mains if you get a decent make and decent voltage
vor example i have a dewalt 18v drill [7 years old will drill through any thing]i also have a ryobi 18v which i think might serve your purpose i classify it as diy light trade £90 argos

 

[matt80]

Well I can get Bosch at a heavy discount due to the company I work for . I can get a PSB 700 RES for £50 or £22 refurbished (basically unused returned items or damaged packaging).

On that basis, can anyone recommend a Bosch model that would suit my needs the best?

Thanks again for all the replies.

 

[big-all]

should be fine
ive got a green 700w bosch and i use it for masonary[but not lintles ] green are basicly diy light trade blue is the big boys stuff

 

[nstreet]

I purchased the Bosch cordless GSR twin pack some years ago and it has been great, its only 12V but will do most jobs. The replacement version looks expensive though. http://www.screwfix.com/app/sfd/cat/pro.jsp;jsessionid=INJYV2BY34HODCJO2C1CJ0Q?ts=10257&id=81594

For the really big jobs I still use the mains powered Bosch 4kg rotary hammer.

 

[Antwerpman]

I just bought a Bosch 14.4V 'professional' model (blue with aluminium 'nose' and red details)

I cant remember the model number but it is a really great piece of kit. I have drilled through everything (not specifically lintels but concrete) and I really cant fault it.