My round head mill drill chattered when applying quill lock, annoying, found the quill was deflecting and putting the drive spline for spindle out of alignment and putting side load on the mating surfaces.
Checked the clearance between quill and housing, 1.5 thou, acceptable as I use moly EP grease. The quill housing is simply too short causing deflection.
Solution is to extend quill housing, machined a billet of 2" 6021 aluminium and machined coarse gramophone finish on one face to get strong key for JB weld. Placed billet around quill and set it on a bed of JB weld and let gravity to align and set in place. Waited 3 hours, did not want the quill to fully set and drove the quill out, almost glued the quill in the housing, would have been an absolute disaster!!
Blocked the openings between casting and billet and poured super strength Araldite epoxy.
Mill runs quiet now.
Mill Chatter Fixed.
Re: Mill Chatter Fixed.
Funny that for a couple of bucks in cast iron that could have been a much better machine from the factory without the end user having to fix what should have been done at the design stage.
Re: Mill Chatter Fixed.
The original quill on my ShopTask ran quiet. The replacement chatters as described.
Comes down to fit and the original was "hand-selected" from who knows how many, whereas the replacement is just taken off the shelf at random.
Comes down to fit and the original was "hand-selected" from who knows how many, whereas the replacement is just taken off the shelf at random.
Re: Mill Chatter Fixed.
I had a Dean Smith and Grace 13X42 Lathe in Australia, no compromise on cast iron there. Reluctantly sold her when I moved to SE Asia.
Also dearly miss my Taiwanese BP clone.
I have 2 Chinese lathes, they perform their tasks but I don't have pride in ownership.
Also dearly miss my Taiwanese BP clone.
I have 2 Chinese lathes, they perform their tasks but I don't have pride in ownership.
Re: Mill Chatter Fixed.
I must comment about the first post. I have never seen this before. You were right there and saw the problem. Opened it up and increased the stability. Lots of work to do that and make it work. Yours may have been MT #3 . Oh boy, adapting R 8 to a Mt #3 extension doesn't work too good either.
Very good info and pics about increasing the quill stability.
Very good info and pics about increasing the quill stability.