Grease for drill

I have stripped my 35 year old Black and Decker hammer drill for a good clean out, brush and motor bearing change. What is the black grease packed around the gearing, is it just a standard graphite grease? Thanks.

You'd probably be amazed at the variety of greases out there, but in your application its probably just a molybdenum based compound grease that has been used....it's great for the high pressure created by the action of gear wheels.
However a good quality lithium based high temperature grease is also popular so you'll get what you need at a motor factors - including a black CV joint grease that would work well.
John

When I refurb old drills, etc I invariably wash out the gear boxes with petroleum (with care because it is highly flammable), allow things to dry fully, then repack with a lithium grease.

Don't go mad and ram every crevice absolutely full with grease as that may cause the motor to run hot and even to burn out - there needs to be some room for the grease to expand when it gets hot and enough space to allow gears to run freely

2/3 full of lithium based should be sufficient. Packing it in around the gearing and centrifugal action will throw it outwards. As it warms up it will dribble between the gearing and lubricate them.
People think you need to pack it in tight but, as said above, this prevents expansion when it heats up and transfers pressure to other parts such as the bearings which then run inefficiently leading to problems with the motor windings.