GenePoole
Cast Iron
- Joined
- Dec 8, 2012
- Location
- St. Louis, MO
I use my SB13 for (among other things) gunsmithing. One common task is to align the bore of a barrel with the spindle bore. There are a few different ways to do this, like inboard and outboard spiders, but in the end, you are checking the runout of the bore in tenths of thousandths.
I've noticed that the oil film on the spindle bearing will run out fairly quickly. You can watch it happen with a tenth DTI. you spin the chuck a few times and get a nice coating on the journal and bearing, then when the spindle stops, you can watch it slowly drop as gravity forces the oil film out. My bearings are shimmed to spec and the oil is fresh and new.
I'm wondering if anyone has ever used a viscosity enhancer like STP in the spindle bearing sump or some other method to try and keep a decent amount of oil film on the bearings for a longer period of time.
I've noticed that the oil film on the spindle bearing will run out fairly quickly. You can watch it happen with a tenth DTI. you spin the chuck a few times and get a nice coating on the journal and bearing, then when the spindle stops, you can watch it slowly drop as gravity forces the oil film out. My bearings are shimmed to spec and the oil is fresh and new.
I'm wondering if anyone has ever used a viscosity enhancer like STP in the spindle bearing sump or some other method to try and keep a decent amount of oil film on the bearings for a longer period of time.