You need to unscrew the thingy from the watsit

At the risk of joining JS in the smartarse corner… no experience of that particular unit but:

– tried removing those allen head grub screws then twisting the index ring? Might just screw off…

– There's what looks like some sort of lock nut with spanner grooves (at about 4 and 10 o clock) within the indexing ring and outside the spindle itself. Make up a tool and try rotating this…

– Also be worth poking something down the keyway visible at 3 o clock on the spindle to see where it is engaged with something…hard to see on the pic but I assume the lock nut as above is NOT fixed to it…

– Also poke/shine a light into the hole at 12 o clock – check for another grub screw?

– Bit unlikely given the index hole spacing but you could look for (and feel with your fingers for in non visible section) any holes running radially inwards from the edge of the index wheel – might be more grubscrews…

This is a spin-indexer right?

This re-machining involved a strip-down which might have helped, Geoff, but it seems that Bogs has moved the pictures. Perhaps he will see this and take pity on you.

Failing that, if you PM me with an email address, I think I have a print-to-pdf of the original that I could send you.

Hi, I can't help with the dismantling, but the Grub screws are there to prevent the indexing plunger locating in an unwanted index position, you unscrew them from the indexing holes that you want to use (or maybe screw them in, depending on the unit).

Nick

There is a small locking tab visible at 11:55 on the picture at the top of this post, You have the small screw already out and need to pry the tab out, then the round nut that has spanner slots in it will turn.You should see the grooves are holding the spanner slotted ring from turning. You can splurge and buy a spanner wrench or use a punch and hammer to loosen it up,

If it's a genuine Hardinge, take care of it, the current list price is (are you all sitting down?) £4,550.00 !!!!!!!!!!!!