I have had this Toro 18 inch corded electrical snow thrower "Toro #38025
1800 Power Curve Snow Thrower - Snowblower"
I have done a lots with batteries lately
http://www.billcotton.com/standby_ac_home_power.htm and
http://www.billcotton.com/bicycle_electric.htm
Such a nice day in Philly today that I decided to take my electric snow
thrower apart to see if I can use a DC motor for power. I have two "made for
the small personal scooter motors", runs from 12 to 24 volts DC. The AC
motor in the machine is sized about the same as the DC motor. I can drill
the existing front motor plate and mount the DC motor. The DC motor has a
5/16 shaft with a flat. The Ac motor has a threaded 3/4 inch wide .647 inch
timing belt pulley.
MSC has this size as timing belt pulley stock 5 inch long
http://www1.mscdirect.com/CGI/NNSRIT...PMPXNO=5497029
However at 48 dollars, I plan to machine my pulley. There is room for
batteries on the plane that the motor in on.
Has any one done this or know of a source for a timing belt pulley this
size. 5/16 bore, .647 O.D. 3/4 wide, no flange.

--
www.billcotton.com


--
www.billcotton.com

However at 48 dollars, I plan to machine my pulley. There is room for
batteries on the plane that the motor in on.
Has any one done this or know of a source for a timing belt pulley this
size. 5/16 bore, .647 O.D. 3/4 wide, no flange.


I just made two timing belt pulleys last week. Read the thread on breaking
endmills with me as OP.

The best tip I got was to make a fly cutter with the tooth profile. Then its
just two passes at each tooth, might have been able to do it in one shot. I
happened to have a devlieg boring bar that made a really nice fly cutter
with a devleig insert. Read up in Machinery handbook for size
specifications. I'm kinda thick headed, it took awhile for me to
understand - ask if'n you don't get it after reading and thinking a bit.

After getting the dividing head setup and cutter profile correct, it only
took a few minutes of machine time. Of course, I had to f%$& the first one
up. Normal for me.

Karl

"Karl Townsend" remove .NOT to reply wrote
in message nk.net...

However at 48 dollars, I plan to machine my pulley. There is room for
batteries on the plane that the motor in on.
Has any one done this or know of a source for a timing belt pulley this
size. 5/16 bore, .647 O.D. 3/4 wide, no flange.


I just made two timing belt pulleys last week. Read the thread on
breaking endmills with me as OP.

The best tip I got was to make a fly cutter with the tooth profile. Then
its just two passes at each tooth, might have been able to do it in one
shot. I happened to have a devlieg boring bar that made a really nice fly
cutter with a devleig insert. Read up in Machinery handbook for size
specifications. I'm kinda thick headed, it took awhile for me to
understand - ask if'n you don't get it after reading and thinking a bit.

After getting the dividing head setup and cutter profile correct, it only
took a few minutes of machine time. Of course, I had to f%$& the first one
up. Normal for me.

Karl
I couldn't find Your thread. I sorted by name.
Yes a fly cutter is the way I plan to go. I have a 5c index spin jig. It has
10 vernier holes and a 36 holes plate Enco part #891-6020. So 18 spaces is
gotten without using the vernier.

--
www.billcotton.com

Bill Cotton wrote:

I have had this Toro 18 inch corded electrical snow thrower "Toro #38025
1800 Power Curve Snow Thrower - Snowblower"
I have done a lots with batteries lately
http://www.billcotton.com/standby_ac_home_power.htm and
http://www.billcotton.com/bicycle_electric.htm
Such a nice day in Philly today that I decided to take my electric snow
thrower apart to see if I can use a DC motor for power. I have two "made for
the small personal scooter motors", runs from 12 to 24 volts DC. The AC
motor in the machine is sized about the same as the DC motor. I can drill
the existing front motor plate and mount the DC motor. The DC motor has a
5/16 shaft with a flat. The Ac motor has a threaded 3/4 inch wide .647 inch
timing belt pulley.
MSC has this size as timing belt pulley stock 5 inch long
http://www1.mscdirect.com/CGI/NNSRIT...PMPXNO=5497029
However at 48 dollars, I plan to machine my pulley. There is room for
batteries on the plane that the motor in on.
Has any one done this or know of a source for a timing belt pulley this
size. 5/16 bore, .647 O.D. 3/4 wide, no flange.


I'd be interested in seeing your power requirement estimates and battery
size/weight/running time calculations.

Have you measured the present ac motor's running current when it's
actually throwing wet snow?

Sounds like fun, but I doubt I could ever make practical use of one like
that. We have a 110 foot long sloping driveway here in Red Sox Country
and it takes me about an hour to clean it, plus the parking area and our
front path after a "decent" snowfall here. That's using my little 25"
1965 Ariens SnoThro, still going strong on it's original Tecumseh engine.

Jeff

--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"As long as there are final exams, there will be prayer in public
schools"

Yes a fly cutter is the way I plan to go. I have a 5c index spin jig. It
has
10 vernier holes and a 36 holes plate Enco part #891-6020. So 18 spaces
is gotten without using the vernier.

Spin jig should work fine. Turn your part in the lathe first. Look up the OD
in machinery handbook. While still in the lathe turn yourself a handle to
go in the 5C collet you plan to use. That way everything is right on center.
I'd also bore your pulley hole at the same time.

I looked up the specs for tooth form in the handbook, used my baldor diamond
carbide grinder with angle table to get the angles just right and then an
optical comparator to get the width and radii just right. But my job was for
a servo drive on my CNC, I needed to be real fussy, no backlash allowed.
For your app, I bet you could just grind the cutter to fit an existing
pulley.

Good luck

Karl

If you succeed in having it run at full load for more than a few minutes
with the space available for batteries, I'm sure Toyota would like to
meet you.
JR
Dweller in the cellar

Bill Cotton wrote:

I have had this Toro 18 inch corded electrical snow thrower "Toro #38025
1800 Power Curve Snow Thrower - Snowblower"
I have done a lots with batteries lately
http://www.billcotton.com/standby_ac_home_power.htm and
http://www.billcotton.com/bicycle_electric.htm
Such a nice day in Philly today that I decided to take my electric snow
thrower apart to see if I can use a DC motor for power. I have two "made for
the small personal scooter motors", runs from 12 to 24 volts DC. The AC
motor in the machine is sized about the same as the DC motor. I can drill
the existing front motor plate and mount the DC motor. The DC motor has a
5/16 shaft with a flat. The Ac motor has a threaded 3/4 inch wide .647 inch
timing belt pulley.
MSC has this size as timing belt pulley stock 5 inch long
http://www1.mscdirect.com/CGI/NNSRIT...PMPXNO=5497029
However at 48 dollars, I plan to machine my pulley. There is room for
batteries on the plane that the motor in on.
Has any one done this or know of a source for a timing belt pulley this
size. 5/16 bore, .647 O.D. 3/4 wide, no flange.



--
--------------------------------------------------------------
Home Page: http://www.seanet.com/~jasonrnorth
If you're not the lead dog, the view never changes
Doubt yourself, and the real world will eat you alive
The world doesn't revolve around you, it revolves around me
No skeletons in the closet; just decomposing corpses
--------------------------------------------------------------
Dependence is Vulnerability:
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"I'm sorry, Dave, I'm afraid I can't do that.."

thrower apart to see if I can use a DC motor for power. I have two "made for
the small personal scooter motors", runs from 12 to 24 volts DC. The AC
motor in the machine is sized about the same as the DC motor. I can drill

I have two 24V electric scooters. These scooters have 250 watt motors
which equates to about 1/4 HP. I don't think that will move much snow.

Even my 36 Volt scooter only has a 350 watt motor which is still less
than 1/2 HP.

My point is that I don't think a scooter motor will have anywhere near
enough power to make a snow blower.

chuck

On 8 Mar 2005 15:22:16 GMT, (Charles A.
Sherwood) wrote:

thrower apart to see if I can use a DC motor for power. I have two "made for
the small personal scooter motors", runs from 12 to 24 volts DC. The AC
motor in the machine is sized about the same as the DC motor. I can drill

I have two 24V electric scooters. These scooters have 250 watt motors
which equates to about 1/4 HP. I don't think that will move much snow.

Even my 36 Volt scooter only has a 350 watt motor which is still less
than 1/2 HP.

My point is that I don't think a scooter motor will have anywhere near
enough power to make a snow blower.

A car starter motor would, but they're intermittent duty 30 seconds
on, 15 minutes off - not a viable duty cycle for the use. One of the
2HP DC treadmill motors would have the oomph and the duty cycle - but
you would need some serious amp-hours from big batteries to turn it
for more than 5 minutes at a shot, and a lot of them to get 90V DC...

Then you get into the temperature effects on the batteries, unless
you store and recharge the thrower in a well heated garage, and keep
the batteries good and warm while in use, you won't get anywhere near
their rated power capacity.

Sorry, but I have to agree that the energy needs to run it properly
don't make a battery powered snow-thrower a viable idea. Unless
you're only clearing a stoop and 5 feet of walk, in which case an
extension cord shouldn't be a problem. And if using utility power is
out, that calls for a good old SHOVEL.

-- Bruce --

--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
Spamtrapped address: Remove the python and the invalid, and use a net.

"Bruce L. Bergman" wrote in message
news
On 8 Mar 2005 15:22:16 GMT, (Charles A.
Sherwood) wrote:

I have two 24V electric scooters. These scooters have 250 watt motors
which equates to about 1/4 HP. I don't think that will move much snow.

Even my 36 Volt scooter only has a 350 watt motor which is still less
than 1/2 HP.

My point is that I don't think a scooter motor will have anywhere near
enough power to make a snow blower.

A car starter motor would, but they're intermittent duty 30 seconds
on, 15 minutes off - not a viable duty cycle for the use. One of the
2HP DC treadmill motors would have the oomph and the duty cycle - but
you would need some serious amp-hours from big batteries to turn it
for more than 5 minutes at a shot, and a lot of them to get 90V DC...

Then you get into the temperature effects on the batteries, unless
you store and recharge the thrower in a well heated garage, and keep
the batteries good and warm while in use, you won't get anywhere near
their rated power capacity.

Sorry, but I have to agree that the energy needs to run it properly
don't make a battery powered snow-thrower a viable idea. Unless
you're only clearing a stoop and 5 feet of walk, in which case an
extension cord shouldn't be a problem. And if using utility power is
out, that calls for a good old SHOVEL.

-- Bruce --
I use a cordless Black and Decker cordless lawn mower. I get about one hour
of run time from it, a parts list picture is here of the motor and 24 volt
battery. http://www.billcotton.com/snow_blower.htm That replacement cost of
motor and battery are over 100 dollars each. I will be buying a replacement
battery next year, the recharge limit is due about that time. I have open
the mower to see about making the battery easy to remove for longer runs.
since I now stop and do the edge trimming while the mower in on short
charge, I put that job off. I may stop by the parts repair center and take
some measurement, I may not have to make a pulley, switch the motor each
season. That would be a blast.
I made the cutter holder and will cut the pulley soon, Flower Show today, A
Philly sign that the snow is over this year.

"Bill Cotton" wrote in message
...

I use a cordless Black and Decker cordless lawn mower. I get about one
hour of run time from it, a parts list picture is here of the motor and
24 volt battery. http://www.billcotton.com/snow_blower.htm That
replacement cost of motor and battery are over 100 dollars each. I will be
buying a replacement battery next year, the recharge limit is due about
that time. I have open the mower to see about making the battery easy to
remove for longer runs. since I now stop and do the edge trimming while
the mower in on short charge, I put that job off. I may stop by the parts
repair center and take some measurement, I may not have to make a pulley,
switch the motor each season. That would be a blast.
I made the cutter holder and will cut the pulley soon, Flower Show today,
A Philly sign that the snow is over this year.
Put my index spin fixture to use, I made a arbor, offset fly cutter holder
and fly cutting grooving tool for the timing belt pulley. I was able to use
the scooter motor mounting plate as a template to drill the mounting holes
away from the AC motor holes in that plate, so that I can return the snow
thrower to AC use for heavy snow. http://www.billcotton.com/snow_blower.htm

--
www.billcotton.com