Bucyrus Erie 40H Excavator 1:14

[Hofabooz]

Hi

This is a great build thread.
Thanks for sharing.
I will look forward to watching this progress.

[Machfab]

Finished machining the Boom Clevis

[Rvjimd]

Nice, I always like these sort of progress photos showing machined parts.

Jim

[Jared]

Looks sharp! I've never been able to decide when drilling smaller holes in a part like that if it should be done before or after milling. If before, it's a deep hole and more opportunity for the bit to wander. If after, the ears might bend if too much pressure is applied also causing the bit to wander. Anyone got an opinion or am I worrying about nothing?

[Machfab]

Originally Posted by Jared

Looks sharp! I've never been able to decide when drilling smaller holes in a part like that if it should be done before or after milling. If before, it's a deep hole and more opportunity for the bit to wander. If after, the ears might bend if too much pressure is applied also causing the bit to wander. Anyone got an opinion or am I worrying about nothing?

Most of the time, I will drill and ream the holes and then machine away the material.

[ihbuilder]

Originally Posted by Jared

Looks sharp! I've never been able to decide when drilling smaller holes in a part like that if it should be done before or after milling. If before, it's a deep hole and more opportunity for the bit to wander. If after, the ears might bend if too much pressure is applied also causing the bit to wander. Anyone got an opinion or am I worrying about nothing?

I drill ream after . I always spot drill 1st and with proper F&S I've never had an issue unless I didn't spot drill . It also helps to keep your drill bits sharp .

[egronvold]

This will be a nice machine. Real heavy duty parts

[thebigo]

Nice... Looks like fun, wished I had your machining experience....

David

[skeeter]

Are there any updates on this build?

[Machfab]

Yes, I have been working on the boom section and it is almost finished.
I would like to post some pics, but what is everybody doing for a host source?

[Bo Wallen]

Originally Posted by Machfab

Yes, I have been working on the boom section and it is almost finished.
I would like to post some pics, but what is everybody doing for a host source?

Looking forward to see your machine. If you chose Flickr you don't have to deal with ads and crap.

[skeeter]

I use flicker.com as it's still free. There are other options, but this is the one that I use.

[Machfab]

Boom, Stick, and Bucket complete. Time for hydraulics!

IMG_0490 by Lyn Byrd, on Flickr

IMG_0489 by Lyn Byrd, on Flickr

IMG_0492 by Lyn Byrd, on Flickr

IMG_0493 by Lyn Byrd, on Flickr

[Jared]

Looking great! Is the stick a solid piece? I'm guessing the boom is solid, too, just two pieces welded together at the bend?

[Machfab]

Originally Posted by Jared

Looking great! Is the stick a solid piece? I'm guessing the boom is solid, too, just two pieces welded together at the bend?

Yes, Stick is solid and Boom is solid but welded at the bend. I wanted some weight in the boom to add some "backpressure" on the hydraulics to make the movements more realistic. I might end up having to remove some weight by "pocketing" the underside.

[Rimrock]

just a small note, would advice a bigger turning motor, same as the track motors you've got (another gear ratio) Such size gearmotors are the 'standard', and about got enough power (but could be even more powerful)

[Machfab]

Originally Posted by Rimrock

just a small note, would advice a bigger turning motor, same as the track motors you've got (another gear ratio) Such size gearmotors are the 'standard', and about got enough power (but could be even more powerful)

Was going to try the small one first and then go to the larger one if needed.

[Lil Giants]

Looks HUGE!

What's your boom/stick weigh?

The boom/stick of the Vario are paired 5mm plate steel incased in GFR, they're heavy! (don't know weight) A combo of EPA & curve in radio settings, the movements of each are smooth with twin 18mm bores on the boom & 22mm on the stick @35Bar - 1.8L flow

[Machfab]

Originally Posted by Lil Giants

Looks HUGE!

What's your boom/stick weigh?

The boom/stick of the Vario are paired 5mm plate steel incased in GFR, they're heavy! (don't know weight) A combo of EPA & curve in radio settings, the movements of each are smooth with twin 18mm bores on the boom & 22mm on the stick @35Bar - 1.8L flow

I would guess about 8 lbs. I will test “as-is” and then reduce weight if needed. I don’t think hydraulic power will be a problem.

[Lil Giants]

You making your own hydraulic system too?