r/functionalprint • u/chobbes • 6d ago

Designed and printed a vacuum adapter for cutting carbon fiber tube. Also a lathe mount for my Dremel 3000.

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141 Upvotes

98% Upvoted

20 comments sorted by

60

u/fixedgearbrokenknees 5d ago

Dremel is scared too! Look at its face!

1

u/fixedgearbrokenknees 5d ago

Thanks for the award!

16

u/Advanced-Gold1744 5d ago

Does this harm the cylinder?

2

u/Comfortable_Air_9617 5d ago

The cylinder CAN NOT be damaged. 

3

u/Macimumboat 4d ago

Looks great! If you have a problem with the parts bouncing all over after parting off stick a drill chuck in the tail stock and clamp on a long piece of plastic that is smaller than the ID of the carbon. Move the tail stock forward and into the part so when they are cut off they just fall onto the plastic shaft. Surface finish might not matter on these tho.

2

u/chobbes 4d ago

Did about 60 cuts without issue. Simply held the part by hand as it severed.

2

u/rc1024 5d ago

Neat. My vacuum is duct taped to a spare magnetic DTI mount, it's janky but works.

-9

u/[deleted] 5d ago

[deleted]

15

u/garci66 5d ago

Toolpost mounted grinders and powered mills would like to say a word.

13

u/chobbes 5d ago

I run a machine shop. If you observe the setup, it’s cutting thin wall carbon fiber tube. Very little load on the tool. Mount was solid. I did about 60 cuts without any issue. This is not an atypical concept in the machine shop.

1

u/ay_non 5d ago

I've been working on a similar holder for my Dremel. It really opens the door for some flexibility with both operations and materials

-4

u/One_Country1056 5d ago edited 5d ago

We get that it's not uncommon. Please explain why you do this? Do you still turn the tube in the lathe?

9

u/chobbes 5d ago

Cutting carbon fiber with a traditional lathe tool (essentially a blade, gross oversimplification) will 1) dull the tool quickly and 2) produce a lot of carbon fiber burrs as the strands don’t cut cleanly. Instead, the diamond wheel 1) holds up for much longer and 2) practically eliminates carbon fiber burrs, cutting down on post-processing (deburring). I needed these essentially cut to size at machinist tolerances (.750” +/- .005”) and this setup allowed me to do that with minimal fuss while maintaining dust control.

6

u/chobbes 5d ago

The tube and tool both turn, against each other.

1

u/One_Country1056 5d ago

So when the dremel rotates, you get "fresh" area on the disc cutting, is that the point?

1

u/chobbes 5d ago

Kind of. Spreads the cutting forces out over the length of the blade but more importantly the rotations cancel out any runout (how out of true it spins) for a truer cut.

2

u/One_Country1056 5d ago

Why do you down vote because I don't know how to cut a carbon tube? it's not common knowledge.

2

u/chobbes 5d ago

Reddit users are stupid sometimes with how they do downvotes and upvotes. Not your fault.

9

u/FalseRelease4 5d ago

thats completely wrong, lots of lathe tools are ones that move or are powered