Embarking on a new project. This could take a while.
Bought a set of plans for a model of a 1910 Holt tractor engine, they were the predecessor to Caterpillar.
Its hopefully going to be a 4 cylinder overhead valve engine.
A lot of small parts for my big fingers and machines. lol
1 inch bore and 1 5/8th stroke. It has wet sleeves and individual jugs on a two piece block.
The plans call for 32 DP gears, that size cutters don't seam to be available from our Chinese cousins and a set of domestic ones is pretty pricey. Saw an article where a chap made a none spiralled broach. The center cutter cuts the tooth and the adjacent ones top and form the next gear teeth over. Made a cutter and it seams to work.
The camshaft gear and a depthing tool I made
Today I started the front gear case. Some scrap aluminum from an aircraft plant, sure machines nice.
Bought a set of plans for a model of a 1910 Holt tractor engine, they were the predecessor to Caterpillar.
Its hopefully going to be a 4 cylinder overhead valve engine.
A lot of small parts for my big fingers and machines. lol
1 inch bore and 1 5/8th stroke. It has wet sleeves and individual jugs on a two piece block.
The plans call for 32 DP gears, that size cutters don't seam to be available from our Chinese cousins and a set of domestic ones is pretty pricey. Saw an article where a chap made a none spiralled broach. The center cutter cuts the tooth and the adjacent ones top and form the next gear teeth over. Made a cutter and it seams to work.
The camshaft gear and a depthing tool I made
Today I started the front gear case. Some scrap aluminum from an aircraft plant, sure machines nice.
Free advice is worth exactly what you payed for it.
Greg
Greg