Mid 80s Kerry(Namsun, South Korea) 16” gearhead Mori wannabe
D1-6 spindle in very nice condition
Brand new Bison direct mount forged steel (4000 rpm) 8” 3 jaw scroll chuck, hardened and ground scroll and pinions, balanced scroll and body.
My initial impressions of this chuck have me very pleased. Not a cheap chuck, $1600 at MSC, but can be had for $1050 shipped from Ajax Tool Supply. I have high praise for Ajax, nice people and great prices with fast shipping. I’m in Ct and the chuck shipped from Ma overnight with just UPS ground. I have only recently started using them, but will definitely be ordering more thru them.
The chuck is speced to run out less than .0015”
I spent some time adjusting the cams and mounted the chuck. The runout at the jaw tips is .0008” (Brown and Sharp .0001 test indicator), and just under .0015” measured 8” from chuck face on a 1” ground boring bar(all I really have for a test bar, I will probably make a better test bar between centers sometime), so really good run outs, but I didn’t have time to see if it’s repeatable after demounting/ remounting. I also need to do some more checks to verify it wasn’t a fluke where boring bar distortion was cancelling out the runout.
The chuck seemed to draw up pretty easy and the spindle face seems to be hard up against the chuck back, for all I know it’s not even touching the taper.
So.. if I blue the pristine chuck back and fit it up, what should I see for contact? The spindle is nice, but not perfect. What would be ideal to see for contact marks, what’s good enough?
I’m certainly not complaining about the runout results, but want ensure a proper fit to prevent damage to the spindle/chuck.
Thanks for any help you could offer
Keith
Sent from my iPhone using Tapatalk Pro
D1-6 spindle in very nice condition
Brand new Bison direct mount forged steel (4000 rpm) 8” 3 jaw scroll chuck, hardened and ground scroll and pinions, balanced scroll and body.
My initial impressions of this chuck have me very pleased. Not a cheap chuck, $1600 at MSC, but can be had for $1050 shipped from Ajax Tool Supply. I have high praise for Ajax, nice people and great prices with fast shipping. I’m in Ct and the chuck shipped from Ma overnight with just UPS ground. I have only recently started using them, but will definitely be ordering more thru them.
The chuck is speced to run out less than .0015”
I spent some time adjusting the cams and mounted the chuck. The runout at the jaw tips is .0008” (Brown and Sharp .0001 test indicator), and just under .0015” measured 8” from chuck face on a 1” ground boring bar(all I really have for a test bar, I will probably make a better test bar between centers sometime), so really good run outs, but I didn’t have time to see if it’s repeatable after demounting/ remounting. I also need to do some more checks to verify it wasn’t a fluke where boring bar distortion was cancelling out the runout.
The chuck seemed to draw up pretty easy and the spindle face seems to be hard up against the chuck back, for all I know it’s not even touching the taper.
So.. if I blue the pristine chuck back and fit it up, what should I see for contact? The spindle is nice, but not perfect. What would be ideal to see for contact marks, what’s good enough?
I’m certainly not complaining about the runout results, but want ensure a proper fit to prevent damage to the spindle/chuck.
Thanks for any help you could offer
Keith
Sent from my iPhone using Tapatalk Pro