.1. Can the crown be separated from the stem,
- and a different (non-vostok) crown be put on the Vostok stem?
1. The crown cannot be easily removed. You must drill a hole though the top of the crown to remove the stem.
A Vostok stem has a clutch system that uses a specially shaped stem end which fits into a special cavity in the crown. Therefore, you cannot install a non Vostok crown onto a Vostok stem.
You must cut the Vostok stem and attach it to the non Vostok stem that is attached to the desired crown.
See this tutorial: Removing a Vostok stem from a standard crown:
#532 - Kamburov
--- A Guide: Buying / Modifying / Repairing VOSTOK...
The three best methods to attach a non-Vostok crown onto a Vostok stem:
- by joining the Vostok stem to a stub of the non-Vostok stem that is attached to the non-Vostok crown.
-- see diagram
- if the non-Vostok crown uses a tapped hole to attach the stem, you can cut threads onto the Vostok stem, (after cutting off the Vostok crown). Then simply screw in the Vostok stem into the non-Vostok crown.
PROBLEM: the Vosok stem MUST be the correct diameter AND correct lenghth but no smaller than the stem required for the non-Vostok crown. You must also have the correct size die to cut the new threads.
- attach the Vostok stem into the threaded hole of the crown by using very strong glue such as epoxy or J-B Weld or similar. This may not be as strong or reliable as the other methods. Also, the threaded hole may have to be drilled larger and the wall of the threaded hole may not be thick enough to create a wider hole. Also, the Vostok stem may be too large and you must grind it to a smaller diameter. If the stem is too small a diameter, it may be a weak joint.
The first method may be the best in this particular situation.
diagram: mine (you may use it freely)