Combustion Fan Motor bearings (Alaska DS 140)

Combustion Fan Motor bearings (Alaska DS 140)

PostBy: Leadslingingdaddy On: Mon Dec 02, 2013 10:44 am

Well, as I was tinkering (that's what the wife calls it") with the stove...actually taking a reading off the stack, filling with coal, and emptying the ash pan...I heard the joyous sound of metal grinding and high pitch squealing coming from the small combustion fan I had running....Good thing I had purchased a new one prior to the season when I noticed I had one that was shot....Previous owner neglected the service on the stove it seems...

I took apart the motor and started to search the web for a replacement set of bearings rather than replacing a 100 electric motor assy....

Bearings were stamped PEER 9R4A... They are 3/4 wide, 5/32 thick and have a 3/16 inner shaft diameter.
Found that a Router Bit Bearing SBE 140 is the same in dimensions so I ordered 4 of them....

Will keep you informed as to the fitment of the bearings and the ability to use these as a fix rather than replacing a whole motor assy.....

On a similar note, as i was looking at the inlet holes where the fans to blow in....Why can't you use a better or heavier fan to provide constant air to the combustion area and, have/make a slide system to regulate the air flow for the burn and not cause an over pressure effect in the firebox..currently there is no way to regulate the CF air rate into the box,,, It's either full on or off.

By next year I will have this thing figured out! Gonna tear it down, re-seal it and put a larger outlet on top...Has an 8 inch pipe now but will go bigger and change the ductwork to be more fruitful..
Leadslingingdaddy
 
Hot Air Coal Stoker Stove: Alaska Dual Stoker 140
Coal Size/Type: Rice
Stove/Furnace Make: Alaska
Stove/Furnace Model: 140 Dual Feed

Re: Combustion Fan Motor bearings (Alaska DS 140)

PostBy: Horace On: Mon Dec 02, 2013 8:12 pm

Leadslingingdaddy wrote:On a similar note, as i was looking at the inlet holes where the fans to blow in....Why can't you use a better or heavier fan to provide constant air to the combustion area and, have/make a slide system to regulate the air flow for the burn and not cause an over pressure effect in the firebox..currently there is no way to regulate the CF air rate into the box,,, It's either full on or off.


I'm not familiar with your appliance or fans, but on the Harman blower that I have, I used to have a flap over the fan inlet that allowed me to control the amount of air going into the box. I then took it off the timer control and plugged it into an outlet so that it ran 24/7. After that worked out well, I wired it to a ceiling fan speed control and took off the flap. It still runs 24/7, but only at about 1/3 its full-speed. Slower speed, less friction, lower heat - I'm hoping that this prolongs the life of the blower.

Is that what you had in mind, or am I way off-base?
Horace
 
Hot Air Coal Stoker Stove: Harman ST8-VF8 / Frankenstove

Re: Combustion Fan Motor bearings (Alaska DS 140)

PostBy: Leadslingingdaddy On: Tue Dec 03, 2013 9:17 am

I heard of the Fridge magnet thing used to cover my air inlet hole for the combustion fans. I will probably end up fabricating a thin steel cover that can swing over the hole to adjust air flow...

I was think in the way of using good quality enclosed fans units rather than the C Framed motors with a squirrel cage fan attached to them....They wear out the bearings when running 24/7..

Its always something that perks an idea to make it better!
Leadslingingdaddy
 
Hot Air Coal Stoker Stove: Alaska Dual Stoker 140
Coal Size/Type: Rice
Stove/Furnace Make: Alaska
Stove/Furnace Model: 140 Dual Feed

Visit Lehigh Anthracite

Re: Combustion Fan Motor bearings (Alaska DS 140)

PostBy: Leadslingingdaddy On: Sat Dec 14, 2013 11:43 am

Well they worked!

SBE 140 bearings, used in wood router applications.

Www.woodshopbits.com

These are for the squirrel cage C-Framed motors that provide forced air for combustion.

Rather than buying a new motor for 60 plus dollars I can now have it back up and running for 10 bucks

Now on to the 1rpm gearbox....

Randy
Leadslingingdaddy
 
Hot Air Coal Stoker Stove: Alaska Dual Stoker 140
Coal Size/Type: Rice
Stove/Furnace Make: Alaska
Stove/Furnace Model: 140 Dual Feed

Re: Combustion Fan Motor bearings (Alaska DS 140)

PostBy: Pauliewog On: Mon Dec 16, 2013 7:21 pm

Great job Randy .... I just ordered a set for a backup. How did you make out with your blower fan thermostat ?

Paul
Pauliewog
 
Hot Air Coal Stoker Furnace: Alaska 140 Dual Paddle Feed
Coal Size/Type: Rice / Anthracite

Re: Combustion Fan Motor bearings (Alaska DS 140)

PostBy: btrowe1 On: Mon Dec 16, 2013 7:26 pm

Randy,

My 140 combustion air fan blows constantly, The fire size is controlled by the feed rate settings low/High adjustment knobs, which are controlled by my home thermostat.

I would not go adjusting / limiting the amount of air that is supplied to fuel the fire.
btrowe1
 
Hot Air Coal Stoker Furnace: Alaska stoker 140 Coal
Stove/Furnace Make: alaska stove

Re: Combustion Fan Motor bearings (Alaska DS 140)

PostBy: Leadslingingdaddy On: Mon Dec 16, 2013 7:50 pm

Paul

The control works great. I now have 80 degree air coming out of the vents...

Btrowe1

Is was talking about the distro fan speed..
I think running both combustion motors overpressurizes the fire box and if they would be the case then I would think of cutting down the fan air supply.

But for now I'm only running one fan motor...

All I know is I have a warm house!
Leadslingingdaddy
 
Hot Air Coal Stoker Stove: Alaska Dual Stoker 140
Coal Size/Type: Rice
Stove/Furnace Make: Alaska
Stove/Furnace Model: 140 Dual Feed

Visit Lehigh Anthracite