Trial fit of cylinders

The planet gears in the plans are made from shop bought gear stock, this is basically a length

of bar with gear teeth cut along it and you cut and machine up your gears from this.

I could not find any bar stock for a reasonable price as its usually made to order so I decided

to make my own gears.

Setting the cutter dead centre I cut along the shaft at slow speed with plenty of cutting fluid.

Each tooth is cut in one pass.

The gear is parted off and machined to the correct thickness, then heat treated to harden

I also need two centres through the crank pin axes for machining the big end.

To do this the bar is fitted to two 'V' blocks and clamped in my mill vice on the mill.

I centred the mill spindle over the first centre drill and then moved the mill table

over to the crank pin axes and put a second centre drill. The bar was flipped 180 degrees

while still clamped to the 'V' blocks and the process was repeated.

Then more material is removed to form the basic shape







As I get down to the final sizes lighter and lighter cuts are used to try and get a nice finish.

With the gear cut I used a milling cutter to form the crank web

Then it is pinned in place

Camshaft, the camshaft is made from 1.25'' silver steel round bar.

First I turned a piece down to size and then turned a small shoulder on the front.

With the piece mounted on the mill I drilled and reamed the two holes which the planet gears

will run in. These holes were drilled through into the mounting block so I could fit two

pegs in to help locate the piece.

The piece is then heat treated to harden the silver steel