Turning the Drivers, Part 3.
Picking up where we left off in Part 2, here's driver #2 on the engineer's side after some metal has been removed. Photo by Terry Thompson.
It's dark in the roundhouse in November (it's dark the whole year for that matter, but it's darker in November), so the shutter speed was only about 1/4 sec, giving a blur that might make you think the driver is being rotated faster than it really was. At the faster speed for carbide, a revolution takes about seven seconds. Photo by Terry Thompson.
Gear change
At the 195:1 reduction gear, Tom is removing the small pulley used with carbide tools. Photo by Terry Thompson.
Replacing with a larger pulley to slow it down for the high-speed tools. That may sound contradictory, but high-speed isn't what it used to be. Now a revolution of the driver will take about 15 seconds. Photo by Terry Thompson.
Adjusting belt tension. Photo by Terry Thompson.
Back at it. Photo by Terry Thompson.
Photo by Terry Thompson.
Done with the engineer's (left) side #2 driver. Preparing to move to the fireman's side. Photo by Terry Thompson.
Working on fireman's side #2 driver. Photo by Terry Thompson.
Checking with profile gauge. Photo by Terry Thompson.