Mark VII Restored Manual - V1.02 – Donated without cost to the world-wide Shopsmith Community - Everett L. Davis 2016 47
ADDENDUM 1 - Supplemental information not in original manual
These are things I included that are not part of the original manual, that I thought you might find helpful in
your understanding of the Mark VII. Although there are some parts that are common with a Mark V or appear
functionally the same, some will interchange, others will not. - Everett
Speed Changer Mark VII
An important component definition: The term
Sheave or Pulley is often used by sailors, crane
operators, mechanics, machinists, and others
interchangeably.
Split Sheave Sets – form Variable Pulleys
For reference concerning components in a
Shopsmith headstock: split sheave sets form a
single variable diameter pulley. Shopsmith calls
them sheaves (half-pulleys), and each sheave
half may be orderable separately as a
replacement part.
This makes the identification of each half of the
sheave necessary either to describe each side’s
function within each assembly for servicing or
for ordering replacement parts.
The Mark VII Parts Manual will have 1963 part
numbers. If common parts are available today,
the part numbers may be different. Call
Shopsmith with any questions. They did not
make this unit, and may not know. The forum is
your friend in these matters.
The speed control mechanism in the Mark VII varies in design from the Mark 5 (Mark V) series. The Cam
system as shown proved to be an inferior design and the cam will melt when subjected to extended use
especially when not lubricated frequently. There are folks who are recreating these parts in different
material. Check the Shopsmith Forums or on eBay.
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