Paul,
I checked with a local electrical supplier and there are a number of
nice little AC frequency drive which will give you a variable speed
control with any 110/220V AC motor. It will also give you reversing
capablities and they are about $200- 300 dollars.
You can do away with all those counter shafts and jsut still with one
speed.
Here is a list of some of the Brand name drives.
Allen-Bradley
Mitsubishi
Toshiba
Sumitomo
Westinghouse
GE
Reliance
T.B. Woods
Asea Brown Boveri (ABB)
Siemens
--- In southbendlathe@..., "Paul R. Hvidston"
<p.hvidston@i...> wrote:
Does anybody have a 9" SB with a similar configuration? My 1941(?)
"Precision Model A" headstock has Timken roller bearings and no back
gear
(as seen from the attached photo). Nothing hangs off of the two ears
on the
headstock casting. With the headstock 3-step cone-pulley along with
another
4-step jack-shaft on the floor-mount pedestal I get 12 speeds. The
jack-shaft and motor were cobbled together from pillow blocks and a
non-reversing repulsion motor. I'd like to re-engineer the power
train
starting with a TEFC 1 HP induction motor and possibly add a
two-step pulley
setup off the motor shaft in order to get the equivalent of a
back-gear.
Spindle speeds? I'd like to end up with 25-2100 RPM. I would imagine
the
roller bearings could handle the high speed safely. Flat belt? has
anybody
purchased a belt and cement from SBL? Others? Cost? Is it worth
machining
v-belt pulleys and getting rid of all that flat belt stuff? I
read/heard
that flat belt slip is a good safety factor if you should crash your
cutter
into the chuck (or whatever).
BTW, surfing the SBL web site I found more history/documentation on
the 9"
series at:
Paul R. Hvidston
Upland, CA
