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This one's a doozy.
My mother had (a long time ago) a Craftsman drill that looked like this, only with a battery pack that is missing in this picture. These are the 315.###### series.
It wasn't super strong but it got stuff done until one day it wouldn't take a charge. I have no idea how they got the batts out of that one, must be a slightly different model -- ours had a non-removable batt pack inside. Those were NiCad sub-C cells, the kind wrapped in kraft paper. Totally unmarked, of course -- I looked as carefully as I could without getting the remains of the deceased all over me (see next paragraph). The pack was held together with tabs capacitor-welded or soldered onto the cells. Total output was six volts. (I've since heard that there was a 7.2v model with, I would assume, the same guts except for an extra cell in the battery pack...) The charger was a worthless unregulated trickle-type charger. POS.
All I know about those batteries, spec wise, is in the paragraph above. I found the drill recently and opened it up. The batteries had exploded and ruined most of the guts, but the motor should still work -- gearbox, drill head (where the bit goes -- dunno proper term) and all. The motor is made by Johnson; I emailed them and got a form letter that says "oh yah that was an oem motor and we don't talk about those".
I'd love to hook that motor up to a wall wart after securing to wood to use as a DIY drill press. I know it's not got a lot of guts, but it's a start, ya know? Thing is I've no real way to find out the specs for it. Craftsman sure as hell won't tell me, and Johnson (as previously stated) won't talk either. Plus I don't have too many 6v wall warts -- and I do NOT want to smoke them testing this thing.
Of note, the motor assembly is the only part of that drill I still have. The guts all went in the garbage -- the trigger I wanted to save but it was half rust. The batteries weren't even safe to touch at this point -- they had battery guts all over them, all the color of badly corroded copper. The charger had no purpose left to its existence. All gone to the dump as of a couple months ago.
I guess the question is -- what is the absolute maximum amount of current this motor could pull, safely, out of a set of five early- to mid-1990s sub-C NiCads? Assume the pack can survive stall current for a few seconds (because it did, frequently).
My mother had (a long time ago) a Craftsman drill that looked like this, only with a battery pack that is missing in this picture. These are the 315.###### series.
It wasn't super strong but it got stuff done until one day it wouldn't take a charge. I have no idea how they got the batts out of that one, must be a slightly different model -- ours had a non-removable batt pack inside. Those were NiCad sub-C cells, the kind wrapped in kraft paper. Totally unmarked, of course -- I looked as carefully as I could without getting the remains of the deceased all over me (see next paragraph). The pack was held together with tabs capacitor-welded or soldered onto the cells. Total output was six volts. (I've since heard that there was a 7.2v model with, I would assume, the same guts except for an extra cell in the battery pack...) The charger was a worthless unregulated trickle-type charger. POS.
All I know about those batteries, spec wise, is in the paragraph above. I found the drill recently and opened it up. The batteries had exploded and ruined most of the guts, but the motor should still work -- gearbox, drill head (where the bit goes -- dunno proper term) and all. The motor is made by Johnson; I emailed them and got a form letter that says "oh yah that was an oem motor and we don't talk about those".
I'd love to hook that motor up to a wall wart after securing to wood to use as a DIY drill press. I know it's not got a lot of guts, but it's a start, ya know? Thing is I've no real way to find out the specs for it. Craftsman sure as hell won't tell me, and Johnson (as previously stated) won't talk either. Plus I don't have too many 6v wall warts -- and I do NOT want to smoke them testing this thing.
Of note, the motor assembly is the only part of that drill I still have. The guts all went in the garbage -- the trigger I wanted to save but it was half rust. The batteries weren't even safe to touch at this point -- they had battery guts all over them, all the color of badly corroded copper. The charger had no purpose left to its existence. All gone to the dump as of a couple months ago.
I guess the question is -- what is the absolute maximum amount of current this motor could pull, safely, out of a set of five early- to mid-1990s sub-C NiCads? Assume the pack can survive stall current for a few seconds (because it did, frequently).
