Engine swap - Snowblower

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sparky961:
Is that a common drive mechanism for snow blowers? It's amazingly simple, but intuitively I'd think it would slip in use.

Brass_Machine:

--- Quote from: sparky961 on October 27, 2016, 10:15:28 PM ---Is that a common drive mechanism for snow blowers? It's amazingly simple, but intuitively I'd think it would slip in use.

--- End quote ---

Not sure how common it is now. This machine is from the 70s so things may have improved. As far as slipping? Haven't really had that problem. This blower got heavy use two years in a row. We had a lot of snow. So it seams to work well.

RotarySMP:
That was thoughtful of Honda to put that nice four bolt flange pattern onto the nose housing. What speeds do you actually use in practice?, I would guess that you would only use one or two speeds once you have gotten used to the machine.

That friction drive on the disc is going to be a lovely damper for the system, so you won't need to worry about torsional vibration, which can eat a gearbox pretty quick.

Look forward to seeing your Mad mod.
Mark

Brass_Machine:
The gears, shaft and bearings came in over the weekend. I had ordered a 24 tooth and 48 tooth gear. And damn, if the are not heavy.

Both had a .5" inner diameter hole. Both gears can be bored, so I took the smaller of the 2 gears to.75" to match the drive shaft.

Now the hurdle to overcome is fitting 2 gears and 2 pulleys where there is supposed to be only 1 pulley. The larger gear is too thick and doesn't allow any room for a mount/bearing on the inboard side (close to the motor)

Serious head scratching as to how I could make this work. Started to think about cutting and welding. Trimming the gear itself down... Then it hits me. Bore a pocket in the big gear!

So onto a boring job! Ignore the step, I started a little too deep. At least it is lighter now!

FYI... I just finished replacing the bearings on my lathe and adding a 4" realbull spindle...

And I think it is going to work!

Now I have to figure out how I am going design the mount. I still may not be able to fit a bearing on the inboard side. Might have to use a bronze bushing.

It will take me a few more days to work out the mount.

Eric

awemawson:
Looking good Eric :thumbup:

I'm a bit puzzled by the axial position of the pulley though. Surely you want it OUTSIDE the front plate of the new gearbox :scratch:

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