prepman
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Thankyou muchly.
- Thread starter 123hotchef
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123hotchef
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Added a spring to help put pressure on the switch and keep.the stay straight
prepman
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Next stage of pump. Spring from old strimmer cord drum, o-ring fitted in lieu of u-cup piston seals and spring action tested and works. Machining end caps. Decision to be made as to whether to incorporated check valves in cap or use external, which might be easier. Stopped to ponder.
Availabilty? Couple of ball bearings and springs? Cramped space in cap? Tomorrow....1st can.......
Availabilty? Couple of ball bearings and springs? Cramped space in cap? Tomorrow....1st can.......
prepman
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Well so far more progress. Drilled the porting and finished piston end cap. Started push shaft guide tube. M12 is 1.75mm pitch which is tantalising close to the last pitch, but not quite right on the Colchester feeds. Cheapo chinese M12 die isn't up to ss. Bottom cap is simple without 'o'ring. Apart from the spring it's all ss and bronze. Push rod will have to be 6-8mm dia. Don't want ss running on ss, so will have to bronze bush it somewhere.
123hotchef
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No not yet, I have some ideas kicking about and some bar, tube and angle steel sitting on the bench waiting to be pieced together.
prepman
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Not sure if there is hole drilled through base for one. Will check on mine in a while, when I re-commence with pump.
123hotchef
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there is no hole on my one, I may bolt a piece of 20mm onto the leg with a grub screw and piece of bar then another section coming up and another going back towards the saw if that makes sense
prepman
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More progress with pump. Sleeve machined and screwed 18mm, extremely hard work. Was a scrap cryogenic valve spindle I think. Tough stuff. But no18mm nut and no18mm taps.. Needs base, check valves and tie-rods.
Easier to buy 18mm nuts. Push rod inserted. 1/4 bsp fittings just as indicators.
.
Easier to buy 18mm nuts. Push rod inserted. 1/4 bsp fittings just as indicators.
.
123hotchef
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It is looking good and will be pumping suds very soon
prepman
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Either that or it'll be the scrap bin. It'll look nice amongst the rusty steel.
The body stainless was very machinable, creameries scrap I think. But the spindle ...argh!
Broke a good few inserts on the thread.
Also found the 1.75mm pitch on the Colchester.....You'd never guess where...
123hotchef
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Go on where was it????Either that or it'll be the scrap bin. It'll look nice amongst the rusty steel.
The body stainless was very machinable, creameries scrap I think. But the spindle ...argh!
Broke a good few inserts on the thread.
Also found the 1.75mm pitch on the Colchester.....You'd never guess where...
prepman
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If I tell you I will have to.....it's not in the leadscrew table, it's the imperial feed table 0.068" feed the required amount is 1.75mm = 0.068897638". Close enough? If it was a long nut on a long thread then ok....but. Ran it down with cheapo die. Just as long as the clutch don't slip.
123hotchef
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I have not ventured into screw cutting yet!
prepman
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Easier than die work. Physically that is.
123hotchef
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not if the die is in the tail stock!
prepman
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Trust you!
prepman
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It starts by rolling up your left trouser leg, being blindfolded and smeared with chicken blood. Or you could just look on Youtube if you've not get the bottle!.
prepman
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It was the best of times...it was the worst of times. Started off well got all pieces finished and just needed to weld a couple of nuts to take cylinder bolts. Tigged 1st ok......but caught the aligning screw and it microscopically fused with nut. From there on it went tits up. Stopped and hit the booze....1st can
Tomorrow is another day. 
Tomorrow is another day. 123hotchef
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ah man u neeed a bigger cheater lense in ya hood! I glued a 15cmx9cm piece of 18mm ply to the bottom tray of my saw to screw the suds pump too
