Since the official manual is hard to find, the collective wisdom of other users is incredibly valuable. These are the most active communities for the Strands S68:
The S68 uses a combination of sealed bearings and oil-bath components. The manual specifies: Strands S68 Drill Press Manual
Drain and replace the gearbox oil after the first 50 hours of break-in operation for rebuilt units, and annually (or every 1,000 operational hours) thereafter. Since the official manual is hard to find,
This is the most sought-after page. It shows how the return spring housing, depth stop nuts, and Morse Taper spindle fit together. If your S68 has a broken return spring, the diagram is the only safe way to rewind it without injury. This is the most sought-after page
For parts: Contact vintage machinery forums or EU-based industrial surplus dealers. Many bearings and belts are standard metric sizes.
Have your machine’s and motor plate data ready.
Never change speeds with the machine running, and always disconnect power first.