Problems with hammer drill chucks.

knightstyle

Recently moved and my old Skill drill was sparking so I bought a new mains hammer drill, Guild brand, cheap but I only had a few jobs to do.
Well the chuck seized after a few uses so I took it back and got a B&D one. Now three weeks later that chuck has seized as well.
That one will now be going back with the masonry drill is jammed in it.

FreeBear

knightstyle said:

Recently moved and my old Skill drill was sparking so I bought a new mains hammer drill, Guild brand, cheap but I only had a few jobs to do.

If you still have the old drill, try replacing the brushes - A cheap fix that may cure the sparking.

knightstyle

Yes, I have done that some time ago but now the commutator is really pitted, it is at least 30 years old.

Lorian

Never heard of the name. When you say it seizes describe what you mean? The ring won't rotate?

Keep_pedalling

Sounds like the drills you have purchased are not up to the task you are using them for. For concrete you need something that takes SDS+ bits.

FreeBear

knightstyle said:

Yes, I have done that some time ago but now the commutator is really pitted, it is at least 30 years old.

If you know someone with a lathe, pop the rotor between centres and give the commutator a light skim. Undercut the copper sections lightly afterwards, and it should be as good as new when reassembled.

travis-powers

It’s good practice to put a small amount of grease in the hole when new and then periodically depending on use, also wipe the end of the bit before using.

knightstyle

The B&D drill was only used four times before the chuck seized to drill into walls above windows to put up curtains.  Fortunately I got a refund without difficulty.
I have now bought a more expensive battery drill from Wickes, hope that is a bit more durable.

GDB2222

knightstyle said:

The B&D drill was only used four times before the chuck seized to drill into walls above windows to put up curtains.  Fortunately I got a refund without difficulty.
I have now bought a more expensive battery drill from Wickes, hope that is a bit more durable.

Wall above window? So, there’s some sort of lintel there. Quite possibly very hard concrete. 

You really need an SDS drill. 

abssorb

knightstyle said:

Recently moved and my old Skill drill was sparking so I bought a new mains hammer drill, Guild brand, cheap but I only had a few jobs to do.
Well the chuck seized after a few uses so I took it back and got a B&D one. Now three weeks later that chuck has seized as well.
That one will now be going back with the masonry drill is jammed in it.

Just in case you're not already doing this - a good habit to develop is when inserting drill bits into the chuck, to not bottom them out. If the drill shank bottoms out, pull it forward 2mm before tightening. This is because the chuck will pull the drill inward as it tightens, and it needs somewhere to go.