• Hi - We're having intermittent forum issues. Posts, alerts, and anything involving email like signing up or password changes are having problems but not for everyone or everywhere. Josh is working on it. No ETA right now. Thanks Josh - BTW this is a volunteer forum so SLA's are just best effort. EDIT -> I manually batch updated about 25 people stuck on the email notification. Try logging in now with your password. EDIT -> May 8/23. I updated another bunch of users stuck on email notifications. Try to login if you are stuck. If you really can't get in contact us on facebook or if you know a forum member get them to ask us.
  • [Ad-Free Experience]
    Register Today, Craft a Post, and Enjoy an No-Advertising Experience.
    Click Here to Register

3D printed Oil Cups......


Jack of all trades -- Master of none
Premium Member
The mystery shaper that I'm working originally came with press-fit oil cups in variety of sizes (4mm, 6mm, 8mm). I attempted to use ball-oilers..... which were 'ok' on the larger sizes, but I found the 4mm ball-oiler really tough to use as the ball is extremely small.

I decided to 3d Print a prototype, and all things considered, I think this is going to work fine. I don't expect them to last forever, they may just erode as I'm unsure the impact of oil on PETG.

I didn't go for a spring hinge (yet), I simply use a straight wire.


And the prototype:


And since that worked fine.... mass production!


And the finished lot:


A single unit comes off the line in 11 minutes..... A batch of 10 in 3 hours....

I used a 1.5mm hole for the hinge and the throat.
These look great.
How long did it take you to design these on your CAD program?
I'm totally new to CAD and 3D printing, so I'm curious how much time guys put in...


Jack of all trades -- Master of none
Premium Member
How long did it take you to design these on your CAD program?
First prototype, 15 minutes. Each revision (there are 3) was about 2 minutes to tweak a dimension.

Full disclosure -- I'm a Fusion hack..... I embrace the sketch/dimension/extrude model.... I don't fully get the 'component' model etc. But I've learned to rapid develop a shape that can be printed really quickly.

First version - cap fit too tight, wasn't tall enough, lid thickness was too thin, it cracked
Second version - used 1mm holes, clearance on cap not enough
Third version - 1.5mm holes (press fit for the wire I have), cap has 'resistance' but does not require two hands to open. Perfect.

I know I can buy these..... saving up for a larger McMaster order..... but this does the job at hand -- delivering oil.


I found some brass ones on e-bay . Here is the item title.
Brass Grease Oil Cup Oiler Spring Flip Cap Fit For Hit Miss Engine 20pcs