19-02-2021, 10:18 AM
the two smaller holes either end.
after manufactureing new blocks i can 80% say they were there originally to remove a stiffening wire for the core in production.
the blocks were cast upside down, and this inner core floats in casting.
would imagine if there was a problem in casting, the wire would stick to the block and be hard to remove.
the latter block had two chaplets in the casting to stop the inner core from floating.
we used the two chaplet method for the new blocks.
tony
after manufactureing new blocks i can 80% say they were there originally to remove a stiffening wire for the core in production.
the blocks were cast upside down, and this inner core floats in casting.
would imagine if there was a problem in casting, the wire would stick to the block and be hard to remove.
the latter block had two chaplets in the casting to stop the inner core from floating.
we used the two chaplet method for the new blocks.
tony