Mark V headstock repair

dusty · Post by **dusty** » Wed Jul 11, 2018 8:37 am

We must not loose sight of the fact that "production line changes" are not always implemented on every unit on the line. Many times changes get phased in simply to consume existing parts inventory.

RufusVendor · Post by **RufusVendor** » Wed Jul 11, 2018 2:17 pm

I bought both screws from Shopsmith (they were only $ .99) to see what I was looking at.

: screws.JPG (176.58 KiB) Viewed 3896 times

The bottom 3/8 inch screw is what I removed from eccentric bushing

holding the idler in the housing with the ears

: eccentric bushing.JPG (177.84 KiB) Viewed 3896 times

: Housing with ears.JPG (181.14 KiB) Viewed 3896 times

Here is the idler

: idler.JPG (173.3 KiB) Viewed 3896 times

(I didn't remove the key and the sheave.)

From the first picture from Everett, it looks like the top 3/4 inch screw served the same purpose in another configuration.

This clears up alot.
Thanks for all the help!

RufusVendor · Post by **RufusVendor** » Thu Jul 12, 2018 6:07 pm

Re: Mark V headstock repair
Post by RufusVendor » Wed Jul 11, 2018 2:17 pm

I bought both screws from Shopsmith (they were only $ .99) to see what I was looking at.

screws.JPG
screws.JPG (176.58 KiB) Viewed 24 times

The bottom 3/8 inch screw is what I removed from eccentric bushing

holding the idler in the housing with the ears

eccentric bushing.JPG
eccentric bushing.JPG (177.84 KiB) Viewed 24 times

Housing with ears.JPG
Housing with ears.JPG (181.14 KiB) Viewed 24 times

Here is the idler

idler.JPG
idler.JPG (173.3 KiB) Viewed 24 times

(I didn't remove the key and the sheave.)

From the first picture from Everett, it looks like the top 3/4 inch screw served the same purpose in another configuration.

This clears up alot.
Thanks for all the help!

RufusVendor · Post by **RufusVendor** » Thu Jul 12, 2018 6:17 pm

ARRRGGG. The pictures didn't download properly. I'll try again.

I bought both screws from Shopsmith (they were only $ .99) to see what I was looking at.

: screws.JPG (176.58 KiB) Viewed 3871 times

The bottom 3/8 inch screw is what I removed from eccentric bushing holding the idler in the housing with the ears

: eccentric bushing.JPG (177.84 KiB) Viewed 3871 times

: Housing with ears.JPG (181.14 KiB) Viewed 3871 times

Here is the idler

: idler.JPG (173.3 KiB) Viewed 3871 times

(I didn't remove the key and the sheave.)

From the first picture from Everett, it looks like the top 3/4 inch screw served the same purpose as the 3/8 inch screw in another configuration.

This clears up alot.
Thanks for all the help!

JPG · Post by **JPG** » Fri Jul 13, 2018 9:15 am

IIUC the two screws serve two different purpose.

The hex head screw prevents the BEARING from exiting out the rear of the eccentric.

The pan head screw prevents the ECCENTRIC from exiting the headstock.

Belt pressure against the idler sheave pushes the stuff out. The screws provide a limit.