Bosch 1199VSR chuck slipping

[brandtmeister]

Hi all,
working on a building a porch and had to drill a bunch of 1/2" holes into concrete. A friend who was helping got the drill bit stuck on rebar a couple of times and now the chuck keeps slipping in both hammer and normal drill mode (I can barely drill through a 2x4 with a 5/8th bit at this point).
I can actually stop the chuck from rotating by gripping it with my hand - motor keeps on running, but chuck is stopped.

Bought a bulldog extreme last weekend to get the job finished (I think it's the 11255 model) and the drilling went very well on the remaining ~ 70 holes.

Anyways, I was wondering if I can get the 1199 drill fixed as it is otherwise a great tool (guess it was undersized for the 1/2" holes)? From the parts diagram I can't quite tell what parts are the clutch/transmission - would guess one of those are the problem. I'll see if I can get it opened up this weekend and check if I can see any worn/stripped parts, but any help/suggestions would be appreciated.

[cmoorejack]

Hey,
It might just be a problem with the switch lever and it is keeping it from becoming fully engaged in the drill or hammer mode..when you get inside look for a bent or broken tab on the lever.. hopefully you don't have any gear damage as that might not make it economical for repair..
Parts are available at eReplacementparts.com : Power Tool Parts and Tool Repair
hope this is helpful..
cmoorejack

[ozy]

I bought my drill 3 years ago at Rona in Canada.

6 Months later, I had the exact same problem; granted I was drilling into wood, but you'd think that the motor in the drill wouldn't have enough torque to kill the gears.

I went in for a replacement and I got a brand new spankin' drill ( same model ). Guess what? 1.5 years later ( and this time doing absolutely no hard drilling at all ), I'm back in the same situation. I was just drilling with a 1/8" bit through some concrete.

The low-speed gear is fine, but the high-speed gear does nothing. I can hold the chuck with my hand and the motor on the drill will keep spinning no problem.

The motor on this drill has way too much torque for its gears / internal components ( IMO ).

If the gears / components can't handle it, then decrease the strength of the motor so that it stalls before killing the gears. The transmission / gears should be the strongest of the two, not the other way around.

I find that with this drill, the marketing of 8.5A on the motor was probably more important to get it sold than the other internal components were. Given my problem and that of many on the web with the same model, I'd think a recall was in order, but then again, I'm just one person, who will think twice before buying another Bosch drill. ;o)

[ozy]

I bought my drill 3 years ago at Rona in Canada.

6 Months later, I had the exact same problem; granted I was drilling into wood, but you'd think that the motor in the drill wouldn't have enough torque to kill the gears.

I went in for a replacement and I got a brand new spankin' drill ( same model ). Guess what? 1.5 years later ( and this time doing absolutely no hard drilling at all ), I'm back in the same situation. I was just drilling with a 1/8" bit through some concrete.

The low-speed gear is fine, but the high-speed gear does nothing. I can hold the chuck with my hand and the motor on the drill will keep spinning no problem.

The motor on this drill has way too much torque for its gears / internal components ( IMO ).

If the gears / components can't handle it, then decrease the strength of the motor so that it stalls before killing the gears. The transmission / gears should be the strongest of the two, not the other way around.

I find that with this drill, the marketing of 8.5A on the motor was probably more important to get it sold than the other internal components were. Given my problem and that of many on the web with the same model, I'd think a recall was in order, but then again, I'm just one person, who will think twice before buying another Bosch drill. ;o)

So I finally got to opening my drill as a result of the one of the plastic motor contacts burning out on me... $3.00 part - had to take the whole drill apart. *rolls eyes*

This gear thing is really the switch lever. I guess that after a few times of switching between gear 1 and 2, the spring in the lever starts eating away at the plastic and the spring looses force. As it turns out, it's preventing the gear from engaging. I'll be ordering the three parts that make up the whole switch lever. Total cost ~ $6.00.

Funny thing is that part #67 isn't listed on the site, so you can't order it...
One question: Is the bigger gear supposed to be really tight against the inner steel 'axle'? To turn it, I really have to grip it hard. The smaller gear runs around, like a knife through butter.