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Once again it's time to bring up an old subject and stir the pot, only
this time with the help of Pin Feed, the problem just might finally be
solved.
For those of us who have been on BT for awhile, my apoligies to the
newer members since this subject has not been around for a long time,
we all can remember the threads about both AMF's and Vantages's small
clutches. Overheating, causing direct drive and all kinds of other dist
trouble. Just about everyone that had them at sometime or other had to
pull them. I'll bet that there are a few die hards that still have them
going though. This past summer I went to Omaha to visit our sister
center, and to see Pin Feed's front roller guards. While looking at the
guards, I saw nothing but small clutches on all his machines. After
talking awhile he explained and gave me one of his setups. By his
request I'm going to try and relate his ideas to all of you along with
some pictures of one of his clutches on my machine along with other
ones that I have made. The problem as we know is that after awhile the
clutch gets so hot that it puts so much tension on it that it runs in a
direct drive mode. To make a long story short, the outer plate is fixed
to the shaft and the spring and nut are turning at the speed of the
shaft. If you look at the outer plate you'll see a ring around the
square hole, the spring is dragging on the plate and nut. This causes
friction and the spring starts to get hot and hoter till one to one
drive. The solution to this is to have the outer plate float on the
shaft and lock the spring to the plate and nut. Once this happens there
is no spring movement to cause overheating. Pin Feed had stainless
steel washers made up for his new outer plates, about thre times as
thick as the original plate. He then used a spring from the hardware
store, same coil and wire size and cut a tapered slot in the washer to
accept the spring. Next he took a 5/8-18 nut and cut a tapered slot in
it and also drilled and taped a 1/4-20 hole on the side of the nut to
secure it to one of the flats on the shaft. Put it together, tighten it
down and you're off to the races. Some might say thta it's a lot of
trouble to do it, maybe, but the more I watch it run, it just looks and
runs better to me.As you look at the pics you'll notice that all my
clutches are home made roller clutches. The current setup is running
just fine and the bearings are repackable.
Pictures #1 and #2 show the clutch using the rear AMF plate.
Pictures #3, #4, and #5 show the clutch using the present day rear
plate and Pin Feed's setup. See how the spring is turned into the outer
plate.
Pictures #6, #7, and #8 show a brake roller clutch with no brake lining
in it - using a leather strap.
Picture #9 has all the different parts used in making both setups.
Picture #10 shows both inner plates. Make sure that you polish them up
before using, the shinier the better.
Pictures #11 shows the washer and one with the spring welded to it. I
opted to weld rather than grind. Once the spring is welded to the
washer I cut the spring 180 degrees from the end. This is to lock it
into the nut..
Pictures #13 and #14 show how I cut the nut to accept the spring. I
drilled and tapped the nut for a10-24 set screw.
Picture #15 shows the clutch disks, Enviro, AMF, Vantage. Have all
three running and no trouble.
The setup that Pin Feed gave me has been in a machine since August and
has not acted up. I would allow a few days once you install one foir
everything to seat itself. There maybe some adj here and there also.
Once dialed in, that's it.
I'd like to thank Pin Feed for sharing this info with me and I hope
that if you try it you'll have the same good luck.
As always questions and comments are wecome,
AMF DOCTOR
The doctor makes house calls.
***To things that I forgot to put in the main body:
The first is that you'll have to use a sleeveless pinion bushing in the
gear. Either the AMF plastic or I prefer Enviro.
Second, if you use the current inner plate make sure and grind down the
tabs that are on the gear so that the clutch disk can pass over them
without dragging on them.
AMF DOCTOR
The doctor makes house calls.
this time with the help of Pin Feed, the problem just might finally be
solved.
For those of us who have been on BT for awhile, my apoligies to the
newer members since this subject has not been around for a long time,
we all can remember the threads about both AMF's and Vantages's small
clutches. Overheating, causing direct drive and all kinds of other dist
trouble. Just about everyone that had them at sometime or other had to
pull them. I'll bet that there are a few die hards that still have them
going though. This past summer I went to Omaha to visit our sister
center, and to see Pin Feed's front roller guards. While looking at the
guards, I saw nothing but small clutches on all his machines. After
talking awhile he explained and gave me one of his setups. By his
request I'm going to try and relate his ideas to all of you along with
some pictures of one of his clutches on my machine along with other
ones that I have made. The problem as we know is that after awhile the
clutch gets so hot that it puts so much tension on it that it runs in a
direct drive mode. To make a long story short, the outer plate is fixed
to the shaft and the spring and nut are turning at the speed of the
shaft. If you look at the outer plate you'll see a ring around the
square hole, the spring is dragging on the plate and nut. This causes
friction and the spring starts to get hot and hoter till one to one
drive. The solution to this is to have the outer plate float on the
shaft and lock the spring to the plate and nut. Once this happens there
is no spring movement to cause overheating. Pin Feed had stainless
steel washers made up for his new outer plates, about thre times as
thick as the original plate. He then used a spring from the hardware
store, same coil and wire size and cut a tapered slot in the washer to
accept the spring. Next he took a 5/8-18 nut and cut a tapered slot in
it and also drilled and taped a 1/4-20 hole on the side of the nut to
secure it to one of the flats on the shaft. Put it together, tighten it
down and you're off to the races. Some might say thta it's a lot of
trouble to do it, maybe, but the more I watch it run, it just looks and
runs better to me.As you look at the pics you'll notice that all my
clutches are home made roller clutches. The current setup is running
just fine and the bearings are repackable.
Pictures #1 and #2 show the clutch using the rear AMF plate.
Pictures #3, #4, and #5 show the clutch using the present day rear
plate and Pin Feed's setup. See how the spring is turned into the outer
plate.
Pictures #6, #7, and #8 show a brake roller clutch with no brake lining
in it - using a leather strap.
Picture #9 has all the different parts used in making both setups.
Picture #10 shows both inner plates. Make sure that you polish them up
before using, the shinier the better.
Pictures #11 shows the washer and one with the spring welded to it. I
opted to weld rather than grind. Once the spring is welded to the
washer I cut the spring 180 degrees from the end. This is to lock it
into the nut..
Pictures #13 and #14 show how I cut the nut to accept the spring. I
drilled and tapped the nut for a10-24 set screw.
Picture #15 shows the clutch disks, Enviro, AMF, Vantage. Have all
three running and no trouble.
The setup that Pin Feed gave me has been in a machine since August and
has not acted up. I would allow a few days once you install one foir
everything to seat itself. There maybe some adj here and there also.
Once dialed in, that's it.
I'd like to thank Pin Feed for sharing this info with me and I hope
that if you try it you'll have the same good luck.
As always questions and comments are wecome,
AMF DOCTOR
The doctor makes house calls.
***To things that I forgot to put in the main body:
The first is that you'll have to use a sleeveless pinion bushing in the
gear. Either the AMF plastic or I prefer Enviro.
Second, if you use the current inner plate make sure and grind down the
tabs that are on the gear so that the clutch disk can pass over them
without dragging on them.
AMF DOCTOR
The doctor makes house calls.
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