Shopsmith Forums

The pulley consists of three 'sheaves'. Two outer that are fixed and a center one that slides between the outer ones.

The sheave shown has the 'stop' that the 0-5 version has. Perhaps you have parts from both versions. IIUC only the numbered plate and the sheaves differ.

I have no idea how the crank screw got damaged.

amboyna wrote:

JPG wrote:A word of caution re the 0-8 speed changer. I would simply refrain from going above 5. Check the sliding sheave. It should NOT have the step at the bore. The step prevents adjusting until the belt rubbed on the shaft.

Never ever adjust the speed and allow the springs on the control screw to become fully compressed. Doing so causes the breakage mentioned above.

I'm a little lost. Is this the sliding sheave?

The previous owner did crank it to 8 where it scarred the crank shaft threads.
See photo 2.

Your floating (sliding) sheave would appear to be the later style. the very early ones did not have the sleeve in the center and if they were not adjusted properly the belt could rub on the shaft.

early on the left, later on the right.
edit. I see Red posted a reply while I was still typing.

JPG wrote:The pulley consists of three 'sheaves'. Two outer that are fixed and a center one that slides between the outer ones.

The sheave shown has the 'stop' that the 0-5 version has. Perhaps you have parts from both versions. IIUC only the numbered plate and the sheaves differ.

I have no idea how the crank screw got damaged.

The sheave shown is the one that came off the 0-8 version. So a normal 0-8 version does not have that part that sticks out past the pulley edge?
Just saw your photo. Never seen the one on the left before. Sounds like someone might of done some parts swapping.
The outer sheave has scrapings that match where the crank threads were bunged up. They cranked it all the way!!!

JPG wrote:The pulley consists of three 'sheaves'. Two outer that are fixed and a center one that slides between the outer ones.

The sheave shown has the 'stop' that the 0-5 version has. Perhaps you have parts from both versions. IIUC only the numbered plate and the sheaves differ.

I have no idea how the crank screw got damaged.

I have two different speed changer manuals. One shows the crank assembled on the pulley side of the main body. If cranked too far the pulley will hit the crank screw. The other manual shows the crank screw on the head stock side of the main body thus avoiding the interference.

See, that's why I like this forum so much. I can just sit back and glean information and stash it away for future use.

Sent from my Moto Z3 Play using Tapatalk

On the other hand, it it is on the headstock side the crank handle can interfere with the headstock lock lever.

With the crank mounted to the left of the ears I haven't had it hit the pulley, perhaps that is specific to the 0-8 model , mine are both 0-5.

rpd wrote:On the other hand, it it is on the headstock side the crank handle can interfere with the headstock lock lever.

With the crank mounted to the left of the ears I haven't had it hit the pulley, perhaps that is specific to the 0-8 model , mine are both 0-5.

Which might be another reason they went with 0-5.

jsburger wrote:

JPG wrote:The pulley consists of three 'sheaves'. Two outer that are fixed and a center one that slides between the outer ones.

The sheave shown has the 'stop' that the 0-5 version has. Perhaps you have parts from both versions. IIUC only the numbered plate and the sheaves differ.

I have no idea how the crank screw got damaged.

I have two different speed changer manuals. One shows the crank assembled on the pulley side of the main body. If cranked too far the pulley will hit the crank screw. The other manual shows the crank screw on the head stock side of the main body thus avoiding the interference.

Uh Huh

and the one with it mounted towards the headstock is a 0-8 whereas the one with it mounted on the opposite side is a 0-5.

JPG wrote:

jsburger wrote:

JPG wrote:The pulley consists of three 'sheaves'. Two outer that are fixed and a center one that slides between the outer ones.

The sheave shown has the 'stop' that the 0-5 version has. Perhaps you have parts from both versions. IIUC only the numbered plate and the sheaves differ.

I have no idea how the crank screw got damaged.

I have two different speed changer manuals. One shows the crank assembled on the pulley side of the main body. If cranked too far the pulley will hit the crank screw. The other manual shows the crank screw on the head stock side of the main body thus avoiding the interference.

Uh Huh

and the one with it mounted towards the headstock is a 0-8 whereas the one with it mounted on the opposite side is a 0-5.

Not sure how you figured this out. But you are correct. I have those two pages as well. I did a high resolution scan of both pages. Then I did a blow up of the speed indicator.
The first detail is from Speed Changer 1 showing the scale goes to five:

The second detail is from Speed Changer 2 showing the scale goes to 8:

What is strange is the fact that the page I pulled the 0-8 scale from has a speed chart that goes to 5. I wonder if they were already in the process of changing the scale.