fly cutter advice please

[JAZZCNC]

Try cutwell tools they sell high quality Collet chuck nuts, both standard and balenced as well as slim line nuts. The balanced ones are the notched type thou and will require a matching wrench which they also sell.
Don't know if they deal with public direct or you need an account. I have an account if you want one getting.?

That said why would you want a spare nut.? In over 3yrs I've not come close to wearing out the nuts on these chinese spindles and I must have changed thousands of bits.
If you make sure the inside where the collet seats is clean and clear of crud you'll never have a problem.

[Jonathan]

That said why would you want a spare nut.? In over 3yrs I've not come close to wearing out the nuts on these chinese spindles and I must have changed thousands of bits.
If you make sure the inside where the collet seats is clean and clear of crud you'll never have a problem.

My collet nut wore out, so that's no doubt where luke11cnc got the idea. I also clean it out regularly. By worn out I mean it developed very poor runout. Luke11cnc kindly lent me his collet nut and the runout is fine with that.
I have checked the runout of the spindle bore and that's fine.

[JAZZCNC]

Surprised to hear that Jonathan.! unusual to develope runout unless seat not cleaned often or not tightened correctly allowing the collet to spin in it's seat. Thou over tightening is just as bad and will distort the nut.
Must say thou I'm very carefull and blow out the nut an clean the taper every time I change a tool, I'm also carefull not to over tighten.

I recently killed a spindle so have a spare nut if you don't find one, I don't really want to sell it but will gladly lend you it when James needs is nut back untill you find one.

[Jonathan]

I clean it with the compressed air, or just wipe it. It's not too bad with aluminium though as the swarf is big chips and I've not cut wood for a long long time, except a quick bed surface.

Granted I do do it up tight, but it's rated for 30-60Nm depending on cutter size (30 for <=6mm) if I recall correctly ... been using a high quality collet lately too because I got it for next to nothing.

I may well take you up on the offer for nut, but it looks like I might have somehow killed the spindle anyway as you might have seen in my previous post. Why did yours break? Did you dismantle it out of interest? I know that's been done (CNCzone), but it would be interesting to see if the bearings vary.

[JAZZCNC]

Killed mine by a silly mistake, I'd had it off the machine to test fit into a spindle mount I'd made for someone. When I replaced it didn't fasten a cable bracket and over a few weeks the cable flexing caused the wire to break inside the small crappy spindle connector causeing a big flash bang dead short. It killed the spindle instantly and blew a torque vector drive ABB ACS350. VFD faulted and wouldn't come out of reset.
The new spindle is much better 8.5A instead of 7A with a much larger better quality 4 wire connector so one can be grounded to body.

Yes I did strip it down heres some pics.
I was very pleased with the build quality and the bearings were in very good condition even after nearly 3yrs use.
Very easy to strip and I wouldn't hesitate to strip one down and replace the bearings. Basicly 30min job Max.

[Jonathan]

I'd had it off the machine to test fit into a spindle mount I'd made for someone.

Done that a few times for the same reason. Now I just use a bar I machined to 80mm as a gauge, but still it's best to use an actual spindle as then I can get the mounts level using surface plate etc..

It killed the spindle instantly and blew a torque vector drive ABB ACS350. VFD faulted and wouldn't come out of reset.

:cry: Have you done anything with the drive since? I've fixed a VFD in which some of the IGBTs and other bits blew on before now, so you never know...worth a try as they're not cheap?

The new spindle is much better 8.5A instead of 7A with a much larger better quality 4 wire connector so one can be grounded to body.

Could you link me to that one to confirm which it is please? What's the run-out like?

Yes I did strip it down heres some pics.

Useful ... better than the other pics I've seen. I've been contemplating modifying one for ATC, but never wanted to risk taking mine apart. Now the rotor/collet chuck is out it should be possible to machine it accordingly.

Thought about trying to rewind the spindle? If it was me I'd have a go. Nothing to loose.

[bllama]

Killed mine by a silly mistake, I'd had it off the machine to test fit into a spindle mount I'd made for someone. When I replaced it didn't fasten a cable bracket and over a few weeks the cable flexing caused the wire to break inside the small crappy spindle connector causeing a big flash bang dead short. It killed the spindle instantly and blew a torque vector drive ABB ACS350. VFD faulted and wouldn't come out of reset.
The new spindle is much better 8.5A instead of 7A with a much larger better quality 4 wire connector so one can be grounded to body.

Yes I did strip it down heres some pics.
I was very pleased with the build quality and the bearings were in very good condition even after nearly 3yrs use.
Very easy to strip and I wouldn't hesitate to strip one down and replace the bearings. Basicly 30min job Max.

How did you remove the aluminum nut off, I'm trying to repair and replace the bearings on mine but I cant get the aluminum retaining nut to came out..


Sorry I'm not on the forum here. thanks for your help

[bllama]

Killed mine by a silly mistake, I'd had it off the machine to test fit into a spindle mount I'd made for someone. When I replaced it didn't fasten a cable bracket and over a few weeks the cable flexing caused the wire to break inside the small crappy spindle connector causeing a big flash bang dead short. It killed the spindle instantly and blew a torque vector drive ABB ACS350. VFD faulted and wouldn't come out of reset.
The new spindle is much better 8.5A instead of 7A with a much larger better quality 4 wire connector so one can be grounded to body.

Yes I did strip it down heres some pics.
I was very pleased with the build quality and the bearings were in very good condition even after nearly 3yrs use.
Very easy to strip and I wouldn't hesitate to strip one down and replace the bearings. Basicly 30min job Max.

Hello, how did you remove the aluminium retaining nut, is there any rick to it, im in the middle of the disassemble process and I cant get around that.. (the nuts stops on the chuck thread)

[Jester]

Weve just fixed two vfd's off a shear. There 3phase ones but still cheaper than buying a brand new one