Milled my first cylinder tonight!!!!!

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berryman70

berryman70

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I try to keep an eye open for odds & ends scrap that I can use on the lathe. This cylinder jig I built here was a piece of tarp winder spool for a dump truck, it already had threads in it to bolt though the exhaust port. Turned it to 43.8mm for a snug fit in a 44mm jug'
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Arrowhead

Arrowhead

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Finally got there, after a long while of making metal chips, to turn this mandrel to hold the cylinder. Only made a 56mm mandrel so far, I tried it out on this dead 394 cylinder I had lying around, worked great, I just did a quick cut to test, I could get a much better finish using the power cross feed. But I'm pretty happy with this, and excited too!!!!
]

Parris, Good job on the cylinder! A lathe is on my list of things to buy. The problem is when I start to save up for one, I use the money on another saw. :dizzy:
 
parrisw

parrisw

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I try to keep an eye open for odds & ends scrap that I can use on the lathe. This cylinder jig I built here was a piece of tarp winder spool for a dump truck, it already had threads in it to bolt though the exhaust port. Turned it to 43.8mm for a snug fit in a 44mm jug'
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That's a cool looking rig, yes I'm definitely keeping my eyes out for scrap after I got rung up at the local matal market for this Alu stock.
 
parrisw

parrisw

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Meadow Beaver
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I try to keep an eye open for odds & ends scrap that I can use on the lathe. This cylinder jig I built here was a piece of tarp winder spool for a dump truck, it already had threads in it to bolt though the exhaust port. Turned it to 43.8mm for a snug fit in a 44mm jug'
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Dolmar 122?
 
FATGUY

FATGUY

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you're right, the fctory doesn't hold anywhere as near a tight tolerance as I try. I shoot for better than .001, but have seen factory cylinders on pro saws out as much as .007". as long as it's out accross the pin and not along the pin, it's all good. as far as the chips, they get recycled:clap:
 
parrisw

parrisw

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you're right, the fctory doesn't hold anywhere as near a tight tolerance as I try. I shoot for better than .001, but have seen factory cylinders on pro saws out as much as .007". as long as it's out accross the pin and not along the pin, it's all good. as far as the chips, they get recycled:clap:

Thanks. I figure if I can do better than OEM, I'm doing ok. When I get my 4 jaw I should be able to do better.
 
parrisw

parrisw

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How much do you bore the cylinder? I wouldn't think it would be much before you take out all the chrome?

I'm not boring the cylinder. I'm machining the base down to decrease the squish. Here is a short vid I did today.

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