Holt Engine (maybe)
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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.

   

   
Free advice is worth exactly what you payed for it.
Greg
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Messages In This Thread
Holt Engine (maybe) - by f350ca - 01-05-2021, 09:06 PM
RE: Holt Engine (maybe) - by Highpower - 01-06-2021, 09:39 AM
RE: Holt Engine (maybe) - by f350ca - 01-06-2021, 10:02 AM
RE: Holt Engine (maybe) - by Highpower - 01-06-2021, 09:47 PM
RE: Holt Engine (maybe) - by f350ca - 01-06-2021, 09:50 PM
RE: Holt Engine (maybe) - by f350ca - 01-09-2021, 08:24 PM
RE: Holt Engine (maybe) - by TomG - 01-10-2021, 11:23 AM
RE: Holt Engine (maybe) - by f350ca - 01-10-2021, 01:44 PM
RE: Holt Engine (maybe) - by f350ca - 02-12-2021, 10:36 PM
RE: Holt Engine (maybe) - by TomG - 02-13-2021, 01:07 AM
RE: Holt Engine (maybe) - by Highpower - 02-13-2021, 02:03 AM
RE: Holt Engine (maybe) - by haroldmulder - 02-13-2021, 08:28 AM
RE: Holt Engine (maybe) - by Highpower - 02-13-2021, 11:33 AM
RE: Holt Engine (maybe) - by f350ca - 02-13-2021, 09:36 AM



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