[Salmo]

I have a Black and Decker 12v cordless drill HP128 that has developed a bit of a bobble in the head. It is still OK for drilling but not to good for putting in screws.

Is it possible to replace whatever is bent? Is it difficult? Is it cost effective?

[Kleftiwallah]

By 'wobble' do you mean you can move the chuck side to side?  If so. . .by the sound of it, I don't think the shaft is bent, it is more likely to be a worn bearing.

These days it is more cost effective to buy new.  'Tis a shame I know.  My Dad's old cross cut saws cost more to sharpen and set than to buy a cheap saw which held an edge far longer than his did!

Cheers,    Tony.

[Welsh Merf]

I agree with Tony: it is probably more cost-effective to buy a new drill.

However, it may well be that the chuck grips have worn, and are therefore not holding the drill bit/screwdriver correctly. I suppose you could find out how much a new chuck would cost!

[allot2learn]

You can get a replacement drill chuck on flea bay for a fiver................

[Salmo]

Close examination says it is the bearing, so replacement is the best option. It has done a lot of work so no real complaints.

[grendel]

just measure the bearing outside diameter, inside diameter and thickness and they are pretty cheap on ebay.
Grendel

[Salmo]

Thanks for advice. Cured the problem with a brand new similar drill without batteries from Fleabay for £11 including post.