DIYbanter - Anyone got a B&D BD602 cordless drill?

John Rumm wrote:
On 27/08/2020 13:30, Julo wrote:

Hi friends, I have also got this model and it's missing the trigger.
Much appreciated if you can suggest me the trigger model for this drill.
Thanks in advance.

No longer available by the looks of it:

https://www.mtmc.co.uk/Product.aspx?...earch&PP GR=0

The product is roughly 30 years old.

Just buy a "for parts" unit off Ebay. Not
money well spent but...

https://www.ebay.co.uk/itm/Black-Dec...2/114335621258

I would be very surprised if the NiCD 6-cell pack was still
in working order. This is Black and Decker after all. So
not only a trigger must be refitted - it likely needs
cells as well. Cells with welded tabs on them, for ease
of assembly.

And Black and Decker never learned the proper way to make
a charger, so you also have that working against you. Without
care, the 6-cell pack could be dead after a couple of years,
because the charger... ruined it. Nickel Cadmium cells are
a great way to corrode all sorts of stuff sitting
next to them inside the drill. Before wasting money
on parts, the product must be opened and inspected for
corrosion damage.

As a 7.2V pack, you stop drilling when the pack voltage
hits 6V, to avoid cell damage. The device is unlikely
to have an indicator for this, or even an automatic
protection feature (low voltage cutoff).

A proper charger would have dv/dt detection of the endpoint,
and that only works well with fast charge cells and
decent levels of charging current.

The Black and Decker charger is more likely to rely on the
user being smart enough to unplug it, which is hardly
a scientific method. B&D would use the
"C/10 charge it forever we don't care if you ruin the cells"
method. That's part of the reason it lasts for two years.

Modern goods have more protections for the Lithium cells
by comparison. Even a company like B&D would use the
methods everyone else uses.

Paul