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Ideas for CNC made bike related trinkets

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Discussion starter · #23 ·
I have a lathe, but in this case the lathe would be not the right tool. A deraileur hanger you mill from bar or plate, not round stock, and mill and thread the holes on the cnc. Technically you could do it on the lathe with a 4 jaw or a face plate, but by the time that's set up the cnc has made 25 of them :p
 
Discussion starter · #26 ·
NorCal_In_AZ said:
I do the hokey shortcut and thread with the drill press by hand.
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The downside to that is on a hanger it would be too easy to get the thread off axis and might cause shifting issues.
An 1mm pitch (i think thats the deraileur thread) thread mill is very common (i used m6 bolts on almost everything) so the $40-$60 is worth while to have that tool on hand.
 
Discussion starter · #27 ·
#28 ·
smashysmashy said:
There's 2 ways cncs thread. one is to just use a tap like you would by hand, but you need an encoder and a LOT of torque. I have neither with this 40krpm spindle. The other way is a thread mill where you use a special bit and make a helical path.

Threadmilling: The Ultimate Guide! WW187 - YouTube
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I’ll have to add that to my watch list. I’m fascinated with metal work. I don’t do any of it myself, but it relates to my hobbies. I love watching Paul Brodie and then I follow Gavin of Ultimate Reloader and Making with Metal for gunsmithing.
 
#30 ·
My friend is a gun machinist. What he told me was crazy, the coolant to not only cool but flush the material out of a barrel while rifling is 4200psi. He uses a pressure washer system on his lathe. He builds long gun barrels for competition shooting.
 
Discussion starter · #31 ·
Small deep holes need high pressure coolant. 100 psi x 0.04 square inches on a 1/4" drill doesn't amount to much force. Companies have different ideas of that "high" is. Usually anything under 1000psi is considered low pressure.

I just ran the machines first program, drilling 4.2mm diam x 25mm deep holes into the table to mount miniature fixture vises.
A machine like this is tricky because you have very little vertical clearance. A standard mill this size would have 300+mm clearance, and 150x250mm table travel. Trading table space for height basically.

Now i just need screws. Who builds things with imperial screws anymore? #8-32 screws and 50mmx16mm spacing. Weirdos.
 

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#32 ·
Bottle cages, that can store Allen/hex keys. Possibly along the 'spine' where the bolts are. Might need to install small magnets to hold the Allen keys. Should hold the most common sizes for bikes.
 
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Discussion starter · #35 ·
Calibration object. The square part is 0.02mm oversized (0.0008"). pretty fricken good for a "toy". Maybe I could try those cranks...

Anyhow, now to draw up so parts and program them for the weekend (still testing and setting up, not ready for real parts yet).
 

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#37 ·
smashysmashy said:
So I googled that machine, saw kickstarter, little black machine.. saw price.... laughed... looked closer, watched video...
You know, that looks pretty awesome. Guy seems to know what he's doing (he's from my city, so... haha).
The spindle and mechanicals aren't on par with mine, but at less than half price so you gotta cut some corners, and it looks like he was wise in which ones to cut. That's the best looking "cheap" metal cutting machine right now I think (xzero mins arent available anymore).
I used to owned a Fadal VMC 430 when I owned Hurricane Components. This was an awesome machine at the time.
Currently I own a company called Exodux. We pretty sub out all of our work to a company called Xometry, which produces parts of great quality at a great price and the lead times are really incredible. I also use a local machine shop that does some small production and prototyping.
The Shariff looks great for what I would need, the only concern is that of the health of that company. No new Youtube videos in the last 6 months and that he wants a pre-order because of no stock on hand. Otherwise.
Click to expand...
 
Discussion starter · #38 ·
Yeah that's a tricky one. I assume the kickstarter has not delivered yet?
Knowing what I know about building and selling little machines, and my neighbour's "failed" 3d printing related kickstarter, and the way manufacturing has been hosed during the pandemic its very easy to think you've got a highly profitable little product and wind up undercharging by half and sinking yourself.

George at Xzero had a stroke, so that effectively ended his business. He has largely recovered physically, but it's a long shot for him to start up making hundreds of machines again. Even when he was going strong, it was sometimes months before a person got their machine because of delays or screw ups in parts orders. I'm wary of attempting to sell mine except on a personal one by one custom basis to people I already know. So easy to lose the house if the price of materials change, or supplies are back ordered, or one customer give a bad review.

So for now, it's a fun toy to play with and make videos.
 
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