sailorman
Well-Known Member
he was using a very large hole-saw in wet plywood = burnt-out windings / armature
Death of a drill?
- Thread starter alahol2
- Start date
TrueBlue
Well-Known Member
Hoover brushes
This may be a waste of time BUT there is (or was) an excellent washing machine spares shop at the western end of Worthing. They've supplied me with brushes in the past..
I'll ask someone who knows and will report back if you PM me, so I'll know you're still interested, else I'll drop it.
This may be a waste of time BUT there is (or was) an excellent washing machine spares shop at the western end of Worthing. They've supplied me with brushes in the past..
I'll ask someone who knows and will report back if you PM me, so I'll know you're still interested, else I'll drop it.
fishermantwo
Well-Known Member
Re: Hoover brushes
I make a point of removing all the brushes out of dead tools before I bin them. Most of the new Chinese one come with a spare set anyway now. Does not take long to get a collection.
I make a point of removing all the brushes out of dead tools before I bin them. Most of the new Chinese one come with a spare set anyway now. Does not take long to get a collection.
supermalc
Well-Known Member
Seems like a lot of people attended the funeral /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif /forums/images/graemlins/laugh.gif
alahol2
Well-Known Member
Re: Rebirth of a drill
Thanks all for the comments.
Rather than throw it away, I thought I'd take it to bits.
Apart from a bit of melted plastic on the side of the casing, the inside looked fine. The brushes had plenty of life in them but the commutator(?) was very black and dusty. I cleaned it up with a fibreglass 'rubber' pen and it came up shiny. Re-oiled and greased bearings and gearbox. Put it all back together and it seems to work fine again. I haven't tried it under load yet as it's 11 at night but I hope it will be OK.
Thanks again all
Thanks all for the comments.
Rather than throw it away, I thought I'd take it to bits.
Apart from a bit of melted plastic on the side of the casing, the inside looked fine. The brushes had plenty of life in them but the commutator(?) was very black and dusty. I cleaned it up with a fibreglass 'rubber' pen and it came up shiny. Re-oiled and greased bearings and gearbox. Put it all back together and it seems to work fine again. I haven't tried it under load yet as it's 11 at night but I hope it will be OK.
Thanks again all
William_H
Well-Known Member
Hi Victorious of course a NiCad cell is 1.2 volts because thats what those 2 chemicals produce in a battery. 1.2 volts of course is nominal and the voltage varies from nearly discharged to charged so it is not hard for Promotional people to bend the truth to describe a voltage as almost anything they like.
So it really is a matter of number of cells.
For those who have lost their charger if you can make a connection to the drill charge terminals all you have to do is insert a multimeter on current range and connect any charger. You may need a resistor to limit the current. About 100 milliamps is a good start and should be left on until the amp hours as claimed by the battery manufacurer have been exceeded by about 30%. It doesn't matter if you charge at a higher rate but don't leave it on too long. good luck olewill
So it really is a matter of number of cells.
For those who have lost their charger if you can make a connection to the drill charge terminals all you have to do is insert a multimeter on current range and connect any charger. You may need a resistor to limit the current. About 100 milliamps is a good start and should be left on until the amp hours as claimed by the battery manufacurer have been exceeded by about 30%. It doesn't matter if you charge at a higher rate but don't leave it on too long. good luck olewill
ex-Gladys
Well-Known Member
1.2v is the "natural" voltage produced by the chemistry in the battery. If you do the school physics lesson of a beaker containing sulphuric and copper strips immersed, you get a voltage from that. Age prevents me from remembering waht it is....
aitchw
Well-Known Member
[ QUOTE ]
Age prevents me from remembering waht it is....
[/ QUOTE ]
That needs a new thread....Death of a brain cell?
Age prevents me from remembering waht it is....
[/ QUOTE ]
That needs a new thread....Death of a brain cell?
snowleopard
Well-Known Member
[ QUOTE ]
Each Nicad cell is 1.2 volts
The "bizzarre" Voltages would be anything Not divisable by 1.2
WHY each cell is 1.2v .. ?
[/ QUOTE ]
I know about the intrinsic voltage of cells, but why do they have such a wide range of numbers of cells? A quick scan shows the following voltages in use, each drill requiring a specific battery: 8.4 9.6 12 14.4 18 24 30
Lead-acid batteries are 2v per cell but we don't see cars with 10v or 16v electrics.
Each Nicad cell is 1.2 volts
The "bizzarre" Voltages would be anything Not divisable by 1.2
WHY each cell is 1.2v .. ?
[/ QUOTE ]
I know about the intrinsic voltage of cells, but why do they have such a wide range of numbers of cells? A quick scan shows the following voltages in use, each drill requiring a specific battery: 8.4 9.6 12 14.4 18 24 30
Lead-acid batteries are 2v per cell but we don't see cars with 10v or 16v electrics.
huldah
Well-Known Member
I found loads of brushes at the local auto electrical repairers. Could probably select one and cut to size. I don't know whether high copper content brushes are suitable for mains power.
Philip
Philip