snow caster mods.

[propane1]

So when I fixed up the caster K84-77 that’s on the 446, I took a link out of the chain and had to adjust auger as close to the bucket as the adjustment would allow to get the chain to fit. Chain fit nice. Very little slack. So at this position the auger is about a 1/4” away from the bucket. The Ford thrower is about the same. The John Deere auger is a good 1/2” away from the bucket. These measurements are not the throwing paddle, but the auger to back of bucket measurement. John Deere throws fine.


Noel

[Eugen]

So then, are we fixing something that isn't actually broken?

[propane1]

Nope not fixing any thing, just rambling. This thrower I’m talking about on the 446 is one I fixed up last fall, before I was a member here. Just giving measurements that I said I would give.



Noel

[DavidBarkey]

That is the way I was going to go but when I relaised that it was going to be so small that the bearing would be going ultra high rpms and failures would be a problem . The housing would need some reworking to do it properly . If I had another housing I might try it latter , but I have enough to do right now just finishing this one and getting it out of the shop. If you guys want to try it I will go through what I was thinking.

Dave

Why worry about rpm, I don't think it would go past 5000 in that position. Most bearings have 20000 rom limit. Am I missing something?

The smaller the sprocket the smaller the bearing which will increase the RPM of the sprocket and the surface speed of the bearings inners . I calculated that it would take a #40 - 6T sprocket to fit in there without a lot of modifications .It would be turning about 7000 RPM . The bearing in so small , it would not hold up and it would have to be made . No one has a sprocket idler that small for #40 chain .


Dave

[DavidBarkey]

Nope not fixing any thing, just rambling. This thrower I’m talking about on the 446 is one I fixed up last fall, before I was a member here. Just giving measurements that I said I would give.



Noel

Thanks , it is always good to compair notes .

Dave

[Eugen]

The smaller the sprocket the smaller the bearing which will increase the RPM of the sprocket and the surface speed of the bearings inners . I calculated that it would take a #40 - 6T sprocket to fit in there without a lot of modifications .It would be turning about 7000 RPM . The bearing in so small , it would not hold up and it would have to be made . No one has a sprocket idler that small for #40 chain .


Dave

Ideally you'd want the same size sprocket as the jackshaft but if there's not enough space for that, yes, the RPM will be very high. And one more bearing to worry about maintaining. I hope the umhw material can last reasonable time.

[DavidBarkey]

what I got done today .

cam in down position for 1 1/4" cutting edge clearance

cam in up position for 1/8" cutting edge clearance

I can go from 1/8" cutting edge clearance to 1 1/4" clearance in seconds . It will take longer to get out of the cab than to switch heights nut will allow me to switch from grass/ gravel to hardscape quickly . If it works well I might put the cams on servo motor so I don't have to get out of the cab .

Dave

[Timj]

if he can dream it, he can build it.
Very nice Dave

[DavidBarkey]

if he can dream it, he can build it.
Very nice Dave

Thanks Tim

[Eugen]

You definitely have a mechanical mind that I don't. I can't figure out how the mechanism works from the pictures. Nicely done!