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| Potty Popcorn Engine |
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| doubleboost:
Nicely done The guide is very critical You made it look easy :thumbup: :thumbup: :thumbup: John |
| DaveH:
Came out very nice :thumbup: :thumbup: :beer: DaveH |
| sbwhart:
Cheers John/Dave I measured the bore up as carefully as I could and as far as I can tell its got a 0.05mm taper in it being smaller at the front, I reckon I can live with that. Made the cross head this morning, started with a chunk of brass in the lathe turned the bore down to a nice fit in the guide, and drilled and tapped it M4, Then keeping the job on the chuck transfered it over to the spin-indexer, zeroed the mill up on its centre line, and fly cut down one side. Before milling down the other side, drilled through 3mm dia then using a 10mm slot drill cut down 7mm, the extra thickness kept everything nice and strong. Index 180 and mill the other side to give a thickness of 10mm. With it still retained on the chuck transfer over to the lathe and part off. Set up in the mill vice and cut out the throat to give clearance to the connecting rod, flaring the throat with files. Finished cross head fitted it's a little tight towards the front but that will run in. One last job this morning the cross head pin a straight forward turning job. Her it is fitted. Stew |
| Stilldrillin:
Looking VERY good Stew! :clap: :clap: :thumbup: David D |
| saw:
Very nice done :thumbup: |
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