Stuck Morse Taper in Warco Major 3024YZ

09 Sep.,2024

 

Stuck Morse Taper in Warco Major YZ

I've recently got a used Warco Major Mill/Drill. I've had it in pieces and have just put it back together. When I picked it up there was an ER32 collet holder in the MT3 spindle, I think it's been in there a while. I tried the obvious step of loosening the drawbar bolt and giving it a tap with a small hammer but it didn't budge. Since then I've tried a bunch of things, still with no luck:

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  • I hit the drawbar as hard as I could with a larger 3lb hammer.
  • I tried holding the tool down using the 32mm slots clamped onto the table and lifting the spindle back up with the mill handle, but the mill started to rock without anything happening.
  • I tried locking the spindle and clamped a 32mm spanner to the table and pulled it down with the T-nut bolts. The spanner bent an alarming amount, but the tool did not release.
  • I tried completely removing the draw bar and using a drift, but the gap is to large as there's no tang on the taper. I put a spacer in and tapped up against that, the drift got a roughed up edge from the force, but still the tool didn't move.

My failed attempt with the spanner, I'm worried that the force, particularly and non-downwards component, could have damaged the mill.

I've bought a larger drift which is in the post, although don't expect much from that. Apart from heating the spindle and using a drift / hitting the draw bar, I don't know what else I can do.I don't own a hydraulic jack but even if I did I don't know how I'd apply while the spindle is still in the mill.

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Does anyone have further suggestions?

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