Almost 10 years ago my favorite drill was damaged in a fire. I liked it
because it was a slow speed 1/2" in a 1/4 - 3/8 drill chassis. As such
it would fit in my little drill box along with bits, screws, anchors,
plugs and other related stuff. After it was ruined, I tried for years
to find a replacement, then I searched for years for a used one, or a
cheap 3/8 drill ro get a new case from. I finally found a 3/8 drill at
the univ. junk sale. It was a 1200 RPM VSR, where my drill was an 800
RPM VSR.
I took both apart, and found the stator was riveted to the midsection
body. Closer inspection showed that the stator and armature windings
appeared to be identical. So I used the midsection, armature, switch
and cord from the donor, and put the drill back together again. The
drill motor ran, but the chuck didn't turn. Oops! I took it apart
again, and looked more closely at the armatures, and found out the donor
armature was shorter. So I used the original armature with the donor
stator, and reassembled it again. Getting the brush holders in and out
was a trick, but by the second time, I had it pretty well down. In the
process, I cleaned the gunk out of the gear reduction and lubed with
synthetic Moly grease.
So my old drill has the chuck, gear reduction, and armature from the
original, and the midsection, stator, switch, cord, and case from the
donor. It is still 800 RPM VSR as original, but the case stickers are
wrong.
On the second try, it works! I am so happy to have my old drill back
again. With it, I can drill joists that are 16" spacing to run wires or
pex. I never had a Milwaukee Hole Hawg 90ยบ drill because they are
expensive and my BD could do the work, for the occasions I need to.
Every potential replacement drill I could find is longer and can't drill
joists in place.
I have a HF 1/2" corded drill as a sub, but it does not like to run
slow, and smells like burning windings if you work it hard. I have a
Milwaukee 3/8 hammer drill. I have dewalt cordless drills, one of which
is a high priced hammer drill, but the nicest drill to use is still my
1980 refurb Black and Decker (now dewalt) drill.
WARNING: Lithium grease: The "white lithium" "grease" in the drive
(gear reduction) of the drill was dry and hard like chalk. That crap
should never be used in anything that you won't clean the "grease" out
every year or two.
MB content: this leads to the failure of monowiper mechanisms. Clean
your monowiper mechanism and grease with synthetic Moly grease, such as
Molykote BR2. I have some things where it has been there over 30 years
and is still good.
Before and after photos attached. If anyone is interested, I have high
resolution before, during and after photos I can send to you, but not to
the list because some have dialup access.
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