Boxer-Engine KeyRing by Bootjevaarder

Bootjevaarder

Education>Engineering

Print Profile(3)

All

A1 mini

P1S

P1P

X1 Carbon

X1E

0.2mm layer, 2 walls, 15% infill

59 min

1 plate

4.7(15)

By Object 2 Colors AMS 0.2mm layer 20% infill P1S/P, X1C

1.1 h

1 plate

5.0(2)

300% Scale - 0.2mm layer, 3 walls, 25% infill

11.9 h

4 plates

Boost

149

193

253

157

Released

Description

KeyRing of a combustion boxer-engine with turning crankshaft and moving pistons.
In this design the pistons of each opposed pair of cylinders move inwards and outwards at the same time. Like all BMW boxer engines.

Printing
No supports.
I printed with PLA+, layer height 0.15 mm.

Assembly
- Use some oil or grease between moving parts for a smooth operation.

- Build the crankshaft using the crankshaft alignment tool.
Apply glue. I use Loctite Super Glue-3 Power Gel.
Attention for the orientation of the piston rods: upper piston rod upside down!

- Click the pistons in the cylinders, placing the assembled crankshaft in the crankcase.

- Screw the winding button on the back of the crankshaft.

Operation
Turn the winding button on the backside of the crankcase.
The pistons of each opposed pair of cylinders move inwards and outwards at the same time.

bmw

2cv

daf

Comment & Rating (24)

@DJF94

Boosted

I really like this design as a Subaru owner! Keep up the good work!

@DJF94

Boosted

Print Profile

0.2mm layer, 2 walls, 15% infill

Great Model!

@DrTrae

Print Profile

0.2mm layer, 2 walls, 15% infill

Really cool print! Although, I did have some issues with the intake/exhaust valve/spark plug holes. Printing on an A1 Mini with PolyLite PLA (Black, Steel Grey and Starlight Neptune), I couldn't get that area to print well without adding supports. Normal (auto) supports with angle threshold set to 10. Other than that, they came out great. Can't wait to give a couple of them to my Subaru buds. Thanks!

@amer.do

Print Profile

0.2mm layer, 2 walls, 15% infill

Beautiful model, works well, but I have to deduct one star because the thin wall between the exhaust and intake valves tends to break; it broke the first time. Gluing the crankshaft is tricky and has too much play. I would have used a square connector. On the second attempt, I significantly reduced the speed. Alternatively, it could be designed thicker from the start. Otherwise, the model is very good. My son liked it, and I printed it at 300% size for him.

(Edited)

@jguzman529

Awesome design!!! I now have a "Show-n-Tell" to explain why I have 2.5L of Subi Love!!!

(Edited)

@bearsports

Boosted

As a BMW rider I really appreciate this design!

@zxpchinadh

great design, this thing for sure would be more popular if you add in a ratchet or a magnate as a fidget toy as it already got the rotating part done.

The designer has replied

@Bootjevaarder

Thanks for your suggestions. For now I do not have the intention to add noise to this design..... I think my other design: "Engine KeyRing by Bootjevaarder - MakerWorld" would be more suitable as a fidget. I will think about it.

@Littlehammer79

Print Profile

0.2mm layer, 2 walls, 15% infill

turned out great

@user_3166354584

Boosted

METROPARQUENIAL

@NeoKoiPrints

Print Profile

0.2mm layer, 2 walls, 15% infill

printed great

License

This user content is licensed under a Standard Digital File License.

You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.