3D Printing - machines owned by members

[PeterT]

I don't have a 3D printer but I thought a good application might be a printed 5C collet to replicate what are sold as emergency collets. These are typically brass or machinable metal & quite spendy (hence I don't own any). Looks like someone else had the same idea. Although I'm not seeing the threads, maybe you need to make a donation for that LOL.
https://www.thingiverse.com/thing:3874554

 

[thriller007]

I don't have a 3D printer but I thought a good application might be a printed 5C collet to replicate what are sold as emergency collets. These are typically brass or machinable metal & quite spendy (hence I don't own any). Looks like someone else had the same idea. Although I'm not seeing the threads, maybe you need to make a donation for that LOL.
https://www.thingiverse.com/thing:3874554

What are “emergency “ collets used for? I don’t have any 5c stuff? Why not just use a regular 5c collet?

 

[RobinHood]

Each collet is designed for a very specific (very narrow) clamping range. So if you have an “emergency” collet, you can machine it to fit your odd-ball size.

In the example above, they need to hold a disc (the green part). So they took an “emergency” collet (which is “soft“ and can be machined) and machined a recess in it so they can hold the disc and do further operations on it.

 

[PeterT]

Exactly as Rudy says. Maybe sacrificial collet is a better term. Its probably more of a special situation or mini production thing. You also need to pre-insert the 3 spacer pins before machining the custom part profile so that the clamping action will fit properly & turn concentrically. Regular 5C collets might be PITA to modify drilling the pin holes within the slits & the collets are hardened.

But I hadn't realized machinable steel were 'only' $20. I've only seen the more expensive , maybe those were the brass ones ~ $50.
https://www.kbctools.ca/itemdetail/?itemCode=1-519-006
https://www.kbctools.ca/itemdetail/1-519-007

I'm not even sure how 3D plastic types turn/machine. I've heard they are not very tolerant of heat. Have you guys messed around much?

 

[PeterT]

Maybe you could do something similar with tight fitting 3DP jaw grips. Picture these attached to your jaws. Clamp the scroll closed, turn the recess profile, now ready to clamp.

 

[thriller007]

This guy has a great one! TNDave thank you for posting it to thingiverse. Here is the link.

https://www.thingiverse.com/thing:3543132

View attachment 12418

That was a good idea to do the link to what you found for others. Mine was from here. https://www.thingiverse.com/thing:3769341
I had to order a couple more tool holders now to go on these now.

 

[thriller007]

Maybe you could do something similar with tight fitting 3DP jaw grips. Picture these attached to your jaws. Clamp the scroll closed, turn the recess profile, now ready to clamp.

here is some I found Peter

https://www.thingiverse.com/thing:2449728

 

[PeterT]

Lots of cool ideas on that site. Better stop looking or I'll never get anything done LOL

 

[kevin.decelles]

I printed an R8 emergency collet last week to stuff in the horizontal spindle of my mill so it stops collecting swarf. Printed ok, used a brass hammer to 'coax' it in there, and then tested 'hammering' it out from the backside. Perfect.

https://www.thingiverse.com/thing:3874554

 

[YotaBota]

This a bit long winded but shows a good example of an emergency collet use, the guy machines a small crankshaft.

 

[thriller007]

Lots of cool ideas on that site. Better stop looking or I'll never get anything done LOL

I made that one last week.

 

[Janger]

Here we go. Just need to print some more!

 

[kevin.decelles]

Here we go. Just need to print some more!

John , how many did you print at once? (All 4?). What was your print time?

I’ve got a single going now to test it out


Sent from my iPhone using Tapatalk

 

[Janger]

I printed 3 after the first one to test fit. 5.5 hours or so for 3. the rail on the chip guard has a bit of angle to it so this does not quite fit perfectly but it seems close enough. it's gripping and steady when clipped on.

 

[Janger]

the print duration for one was 1:52.

 

[kevin.decelles]

Wow, you must have good print speed. What % infill and what pattern?


Sent from my iPhone using Tapatalk

 

[kevin.decelles]

I have to mod my stl, didn’t fit .


Sent from my iPhone using Tapatalk

 

[Janger]

Wow, you must have good print speed. What % infill and what pattern?
Sent from my iPhone using Tapatalk

0.30mm draft mode.
infill was 20% and with grid pattern. 2 perimeters.
Here's the speed settings too.

 

[YYCHM]

the print duration for one was 1:52.

LOL.. You have officially convinced me that I don't have the patience to play with one of those things.

 

[Janger]

Ah. You get it setup and let it run. Tooling being manufactured while I do other stuff. I can’t sleep with it running so if it’s longer than 16 hours I tend to not start. Split it up into pieces if possible.

I’m printing two more bxa holders and I’ll have enough.