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Hi! I started using inventor around 1,5 year ago. I was playing with different designs, mostly for my engineer degree. Then i make a excavator bucket based on Volvo bucket for ultimate 8043:

bucket.png

After that, i forgot about my project. I've lacked time and money. But this year's summer I printed it myself:

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Then i started making new elements compatible with Technic:

hhook.pnghook.png

Heavy Hook for GMK6400 Light hook made to replace Lego Metal Hook (part #70644)

Part in metal are very hard to make, because they expand somehow and doesn't hold dimensions.

liebherrshovel.png

Liebherr Wheel Loader Bucket for M_Longer L580 (slightly smaller than Lego Volvo Shovel, much bigger than part #32030).

liebherrbucket.png

Liebherr Excavator Bucket (little bit bigger than my previous excavator bucket, dimensions similar part #32030).

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Rod 15L to use in trucks made by Ingmar Spijkhoven (which i also own - great trucks!)

And some teaser for my prototypes:

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12 tooth sprocket, 8 tooth sprocket, blind pulley narrower than part #13971, rod to use in GMK6400 instead of part #6571.

I am also trying to entirely replace part #6571. If you have some new ideas about rare parts which are hard to get or very expensive I can help you.

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Looking good!

Do you have any photos of the 8043 with your bucket? Also, it would be nice to see your 2 sprockets lined up with the two existing sizes so we can see the variation.

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Very interesting! I'm starting to see more and more custom parts, and it's kinda growing on me.

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Looking good!

Do you have any photos of the 8043 with your bucket? Also, it would be nice to see your 2 sprockets lined up with the two existing sizes so we can see the variation.

Yes, i have. Here are sprockets:

sprocket.jpg

And here is 8043:

exc.jpg

There is also film made by Technicbricks:

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A good logical progression in size for the sprockets. Your digger bucket is also sized well on the 8043, a few mm different to Efferman's rock bucket. Nice!

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That first excavator bucket looks wonderful in real - what kind of 3d print is that? I guess you used some of these laser liquid resin printers? Otherwise I have no clue how did you manage to print such part :D

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on shapeways i recommend for the crossholes i a diameter of 4,9mm and the width of the cross 1,85mm. And if possible be sure the hole axis is vertical during printing or they will get oval.

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Those were made with diameter of 4,9 mm and width of the cross 2 mm and they are still too tight. It looks like axle is stuck where material is thicker:

WP_20151126_18_36_35_Pro.jpgWP_20151126_18_36_55_Pro.jpg

I wonder if making it diameter of 5 mm and cross 2,1 mm will be better?

Edited by xsysiek

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with these dimensions still to tight? what is the wall thickness around the cross? do you have rounded the inner edges inside of the cross?

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Outer diameter around the cross is 8 mm so it gives 1,55 mm minimum wall thickness around the cross. Inner edges were chamfered. But disk thickness is 3,5 mm and only in this part there is problem with axle.

sprocketx.png

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Reduce the 3,5mm thickness of the disk to 1,2mm. Strong and flexible is solid enough to hold with this wall thickness. and in addition you save material which costs money.

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I finished thinning sprockets and changed axle hole dimensions to d5 mm and width of the cross around 1,9 mm. Only saved 0,50$. Do you think I should make them in pairs? Now price is around 11$ for 12T sprocket and 6,5$ for 8T sprocket.

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New parts arrived!

WP_20151216_19_24_35_Pro.jpg

New Heavy Hook block is ready! Compatible with Lego Technic Metal Hook or with future add-on (double hook). Can be used with any of the wheels above (my or LEGO).

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Substitute for LEGO part #6571. So you don't have to buy expensive and rare parts for Ingmar Spijkhoven trucks.

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Sprockets version 2.0 (thinned). Little too lose, but after thin clear coating they should be OK.

If you have some new ideas, i am open to suggestions.

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I'm interested in the wheelloader bucket, can't find it on Shapeways unfortunately, will it get on there in the future?

Edited by Dafgek81

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If axles holes are undersized and oval, a "broach" is required to ream out the axle holes to the correct fit.

I use a Lego threaded axle as a broach to remove polishing dust and ease the fit.f

Edited by Doug72

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@Dafgek81 Wheelloader shovel is public and ready to go. Walls are 1,4 mm thick. Front and sides are little strengthened, like in the original.

@Doug72 I don't have such parts. In future i will use effermans method to thinner walls around axle hole.

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