- Thread starter lotus 30
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lotus 30
classic car enthusiast mostly lotus
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lol what is Delrin off to google
Kram
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Its a nice easy machining plastic. Also known as POM or Acetal. Takes a good finish and any edges clean up nicely. Test piece I did a few days ago...
Got mine here
Got mine here
Acetal/SustrainC 20mm Dia, Blue, Bar Ends, assort. 25-100mm long x 25off | eBay
Ranging from 25mm long to 100mm long. 25 xBar Ends. Food Grade.
www.ebay.co.uk
Screwdriver
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Kram
Member
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Even with the sharpest tools its like turning dog poo but stopping every few seconds to clear the strings!
Brad93
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- Essex, United Kingdom
Faster and higher feed. You need to literally shoot it off like ribbons.
northwest
Searching for the Holy Grail.........
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Nylon swarf will drag you in and it has no mercy!
I will not use it (if at all possible) as it WILL hurt you if it can. God help me, I am getting "sensible", this is a slippery slope if there ever was one. I will be wearing ear defenders and safety goggles next.
I will not use it (if at all possible) as it WILL hurt you if it can. God help me, I am getting "sensible", this is a slippery slope if there ever was one. I will be wearing ear defenders and safety goggles next.
Hood
I am obsessed.
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I use Nylon for rollers for fishing boats hanging blocks, it stands up better than acetal in this application but it is not as nice to turn as has been said. Deep cuts so that the swarf flies off in long streamers but also has been mentioned keep clear of them as they are extremely strong and if the wrap around your hand and get pulled into the chuck you will either have a severed hand or a smashed up hand. Also make sure that anything loose that could be tickled up in the swarf is well out of the way, last thing you want is a lathe tool or similar getting caught up in the swarf and being pulled at high speed towards the chuck.
I do most of the nylon turning on the CNC and in the days before I had the hydraulic chuck I hated doing it as I have even had get pulled out of the chuck with the swarf catching on something solid and wrapping round the chuck and part and pulling it out, not nice having a 120mm dia lump of nylon coming loose at 800 rpm
I have also had it wrap around a tool in the turret and pull it clean out.
Vid of the nylon rollers in question.
As a comparison here is some acetal, note at the end how the swarf pulls off and snaps easily, you can't do that with nylon. I was taking baby cuts with this as it was the first job I had done with the new control I had just fitted.
I do most of the nylon turning on the CNC and in the days before I had the hydraulic chuck I hated doing it as I have even had get pulled out of the chuck with the swarf catching on something solid and wrapping round the chuck and part and pulling it out, not nice having a 120mm dia lump of nylon coming loose at 800 rpm
I have also had it wrap around a tool in the turret and pull it clean out.Vid of the nylon rollers in question.
As a comparison here is some acetal, note at the end how the swarf pulls off and snaps easily, you can't do that with nylon. I was taking baby cuts with this as it was the first job I had done with the new control I had just fitted.
northwest
Searching for the Holy Grail.........
- Messages
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- Manchester UK
I use Nylon for rollers for fishing boats hanging blocks, it stands up better than acetal in this application but it is not as nice to turn as has been said. Deep cuts so that the swarf flies off in long streamers but also has been mentioned keep clear of them as they are extremely strong and if the wrap around your hand and get pulled into the chuck you will either have a severed hand or a smashed up hand. Also make sure that anything loose that could be tickled up in the swarf is well out of the way, last thing you want is a lathe tool or similar getting caught up in the swarf and being pulled at high speed towards the chuck.
I do most of the nylon turning on the CNC and in the days before I had the hydraulic chuck I hated doing it as I have even had get pulled out of the chuck with the swarf catching on something solid and wrapping round the chuck and part and pulling it out, not nice having a 120mm dia lump of nylon coming loose at 800 rpm
Vid of the nylon rollers in question.
As a comparison here is some acetal, note at the end how the swarf pulls off and snaps easily, you can't do that with nylon. I was taking baby cuts with this as it was the first job I had done with the new control I had just fitted.
Do you think the coolant is needed on the plastics?
Hood
I am obsessed.
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- 17,597
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- Carnoustie, Scotland
On the manual I very rarely use coolant with acetal or nylon unless drilling nylon, then it is a definite, just needs a trickle but if none then it will very quickly overheat and the drill can get pulled out of the morse taper on the tailstock and start spinning.
On the CNC I always use it as I am not stopping it every few seconds when it wraps round the part so best to try and keep things lubricated and cooled.
On the CNC I always use it as I am not stopping it every few seconds when it wraps round the part so best to try and keep things lubricated and cooled.
when you day model making it also depends on the size you're talking about. with the smaller thi,ngs I do I dont have much of an issue, but I do use sharp tools and they cut rather than rubbing the piece..... I need to make some nylon tubes, 0.9mm id, 2.0mm od and 7.0mm long.
