Roger Chandler
06-24-2011, 11:21 AM
I have noticed a number of SN2 owners have complained about the chuck being hard to turn. some have had the clip replaced with a thinner one from Teknatool, some have used lapping compound and worked it until the gears turned more easily. My last SN2 was for a Christmas present...have used it for 6 months now, and it had gotten harder to turn as I have gone along........dust buildup,etc.
Last night I decided to take the thing apart, do a good cleaning [used spray carb cleaner....worked great] and see how it helped.......well not much, so I began to think about what was really the issue.....
I found that the backing plate needs some working over to make things run smooth. Here is what I did.....after the cleaning and getting the slides in correct position, and greasing up the scroll gears, I still had the hard turning issue.........
the plastic backing plate has a center hub.......I took it to my belt/disk sander an took a very small bit off the center hub. Also where the hub fits over top of the pinion gears, I took a dremel with a cylindrical grinding stone and opened up the area where the pinion gears fit in the slot...........made all the difference, and now the thing works like a charm.
You can find a maintenance and cleaning .pdf document at Teknatools website, and it will show you how to correctly align the jaw slides [this is crucial!!!] There are pics and descriptions that will lead you through the process.
They don't mention the grinding on the hub of the backing plate, or the slots where the pinion gears seat, but that is part of the problem.....believe me!
I am so glad I did this, and now my newest of my 3 chucks now works super great!
Last night I decided to take the thing apart, do a good cleaning [used spray carb cleaner....worked great] and see how it helped.......well not much, so I began to think about what was really the issue.....
I found that the backing plate needs some working over to make things run smooth. Here is what I did.....after the cleaning and getting the slides in correct position, and greasing up the scroll gears, I still had the hard turning issue.........
the plastic backing plate has a center hub.......I took it to my belt/disk sander an took a very small bit off the center hub. Also where the hub fits over top of the pinion gears, I took a dremel with a cylindrical grinding stone and opened up the area where the pinion gears fit in the slot...........made all the difference, and now the thing works like a charm.
You can find a maintenance and cleaning .pdf document at Teknatools website, and it will show you how to correctly align the jaw slides [this is crucial!!!] There are pics and descriptions that will lead you through the process.
They don't mention the grinding on the hub of the backing plate, or the slots where the pinion gears seat, but that is part of the problem.....believe me!
I am so glad I did this, and now my newest of my 3 chucks now works super great!