09-15-2017, 02:11 AM
All back together again with new bearings.
Thankfully I thought to measure the backlash in the gears before stripping it down, as the backlash is set by a threaded collar above the gear, which needed to be removed to get the spindle out.
Here's a quick video of where I measured it beforehand: https://www.youtube.com/watch?v=S_t-djSp5cY
Not knowing what its actually meant to be set at, I opted to set it a touch smaller at around 0.3mm as the wear in the bottom bearing would have opened up the clearance slightly, and since the bearings were original I doubt anyone has ever messed with the backlash adjustment.
I set it dry as there wasn't really any oil in it when I originally checked the backlash. Once I was done - by feel there was distinct clearance dry, but felt smooth and no obvious backlash once the head was filled with oil.
I ended up putting some decent 85W140 mineral gear oil in it.
Next challenge is to modify some R8 arbor tooling I bought so it fits the Van Norman taper. Both the parallel and tapered sections of the R8 need to be reduced.
First up will be the ER32 collet chuck...
Steve
Thankfully I thought to measure the backlash in the gears before stripping it down, as the backlash is set by a threaded collar above the gear, which needed to be removed to get the spindle out.
Here's a quick video of where I measured it beforehand: https://www.youtube.com/watch?v=S_t-djSp5cY
Not knowing what its actually meant to be set at, I opted to set it a touch smaller at around 0.3mm as the wear in the bottom bearing would have opened up the clearance slightly, and since the bearings were original I doubt anyone has ever messed with the backlash adjustment.
I set it dry as there wasn't really any oil in it when I originally checked the backlash. Once I was done - by feel there was distinct clearance dry, but felt smooth and no obvious backlash once the head was filled with oil.
I ended up putting some decent 85W140 mineral gear oil in it.
Next challenge is to modify some R8 arbor tooling I bought so it fits the Van Norman taper. Both the parallel and tapered sections of the R8 need to be reduced.
First up will be the ER32 collet chuck...
Steve