Section 3 - Drive Wheels

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Neidrauer Live Steam Locomotives Photo Albums » Building a Live Steam Locomotive - the Mikado Project » Section 3 - Drive Wheels

The Saga of the main drive wheels. Started July 2005, finished December 2007 with a break in the middle to find, move and restore a bigger lathe.

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65-74 (of 74 found)

Wheels 005 6-Jul-05 A few taps with a piece of soft copper for fine adjustment.

Wheels 008 6-Jul-05 The massive counterweight of the main drivers caused the lathe to jump a little as it swung around, but nothing so serious that it actually moved.

Wheels 009 6-Jul-05 In motion, here is what the boring operation looked like.

Wheels 010 13-July-05 Once all the wheels were bored out, we made a close-fitting mandrel (or stub shaft) in the 4-jaw chuck to mount the wheel on. The friction fit drove the wheel.

Wheels 012 13-Jul-05 Truing the back to the newly bored hub hole. You can see the end of the arbor in front of the live center.

Wheels 017 13-Jul-05 Machining a brass spacer to put between the two wheels. We discovered the crankpin holes on each wheel did not line up correctly when placed on a keyed shaft. We will put this spacer between two wheels, back-to-back, to bore out the crank pin holes.

Wheels 029 20-Jul-05 Cutting a keyway slot in the mandrel.

Wheels 030 20-Jul-06 Aligning the mandrel to be perfectly square and parallel to the spindle. The parallelism of the crank pin holes to the hub shaft hole depends on accuracy here.

Wheels 031 27-Jul-05 The 'wheel sandwich', ready to bore the crankpin holes.

Wheels27July05 004 27-Jul-05 The bottom wheel placed on the mandrel, with the spacer in place. If we had just stacked the wheels on top of each other without the spacer on the newly machined reference surface, the wheel backs might not be parallel, resulting in crankpin holes which would be cocked and not perpendicular.

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