SIEG help please

[Mike Ginn]

The attached shows a screwed collar at the base of the quill. This has become loose and I am at a loss to understand its purpose. I have no diagram showing the spindle/quill or the collar.
Any advice would be appreciated
Many thanks
Mike

 

[Mike Ginn]

I did find the lost manual and discovered that the ring was to retain the oil seal and the screws were to hold the ring from turning - strange arrangement. I have tightened the ring, kept the screws in their original positions and all seems to be well!
Mike

 

[ninefinger]

That type of arrangement the set screws are what "preload" the large diameter thread to keep it from loosening off. So you should back the set screws off a bit, tighten the collar (probably by hand if its just retaining a seal - you don't want to crush the seal) and then tighten the set screws to lock the collar in place.

 

[Mike Ginn]

Thanks ninefinger - I had never come across such an arrangement before. I guess its a cheap method to load a seal!
Mike