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Search took 0.03 seconds; generated 39577 minute(s) ago. Search: Posts Made By: Rvjimd
Forum: Construction Equipment 06-19-2015, 11:02 AM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Working on one of the MANY small details. Trying some delrin for the shaft on the idler tumbler.

http://i1291.photobucket.com/albums/b554/Slotcarjim/IMAG1000_zpsmtw0crhw.jpg

Jim
Forum: Construction Equipment 06-18-2015, 11:01 AM
Replies: 183
Views: 95,569
Posted By Rvjimd
Re: Hayes HD Dump Truck - Take II

Reg,

Very cool! Any tricks to making the matching dies? Do you just turn the second one to match the dimensions of the first, less the amount of allowance for the stock to be stamped?

And,...
Forum: Construction Equipment Tech 06-17-2015, 11:35 PM
Replies: 6
Views: 2,333
Posted By Rvjimd
Re: roller bearings

Looks like servo city has some...

https://www.servocity.com/html/flanged_ball_bearings__metric_.html#.VYI7q3A8KrU

Jim
Forum: Construction Equipment Tech 06-17-2015, 11:14 PM
Replies: 6
Views: 2,333
Posted By Rvjimd
Re: roller bearings

Good question, I may need a few for my crawler project.

I have gotten a few at a time at my local hobby shop, in the RC cars section. You will need to know the sizes of what you need.

I would...
Forum: Construction Equipment 06-17-2015, 11:09 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Jared,

Thanks! I was waiting on the 2-56 screws so I could assemble a complete set and start checking the pitch and freedom of operation. I do plan on 6 lower and 2 top rollers. In fact, I...
Forum: Construction Equipment 06-16-2015, 04:38 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

I got some of my Enco order today and it had some of the 2-56 screws I was waiting on. I think I can shape the ears on the pads and get smooth operation.
...
Forum: Construction Equipment 06-15-2015, 04:34 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Slip ring? Has anyone tried a DIY slip ring? I have repaired one on a in motion servo satellite reciever and I am thinking about trying it. I guess I haven't looked online yet to see how much they...
Forum: Construction Equipment 06-15-2015, 04:21 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Decided to bolt up both sides again so I took a few more shots.

http://i1291.photobucket.com/albums/b554/Slotcarjim/IMAG0992_zpsoyw2lm5j.jpg

Shaft coming out the wrong side here, but no problem...
Forum: Construction Equipment 06-15-2015, 11:04 AM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Truck maker, thanks for the link. I always forget about McM for parts. I just seem to get stuff other places.

Tom, the .25 looks okay. Maybe just a bit big but not too bad. The common 10T...
Forum: Construction Equipment 06-15-2015, 09:53 AM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

I am planning to drive the crawler with chain and sprockets like a full scale. I am thinking about ordering some of this .1227" plastic chain but it says 14lbs tensile strength. Is that is way to...
Forum: Construction Equipment 06-14-2015, 06:02 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Finally got one tumbler done both sides. I am waiting on hardware so I can assemble an entire unit. Need to have it nearly complete so I can tell what I need to do to the drive dog ears on the pads...
Forum: Construction Equipment 06-14-2015, 12:52 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

And now, for something completely different...

Here is my first prototype drive tumbler! Still working out the details.
...
Forum: Construction Equipment 06-14-2015, 07:00 AM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Thanks guys! I think I am going to start working on a drive tumbler while I wait on my 2-56 hardware to arrive. I figure if the diameter of the tumblers change so will the idler rollers so better...
Forum: Construction Equipment 06-13-2015, 11:59 AM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

How would you make these idler rollers?

http://i1291.photobucket.com/albums/b554/Slotcarjim/IMAG0987_zps1brs6kxs.jpg

http://i1291.photobucket.com/albums/b554/Slotcarjim/IMAG0986_zpsybdtjckg.jpg...
Forum: Construction Equipment 06-12-2015, 06:15 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Not too much "visible" progress today but I have actually gotten a bunch done. I wasn't happy with the brass pins linking the pads so I decided to try taping 2-56 holes in the outside tabs and...
Forum: Construction Equipment 06-12-2015, 08:17 AM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Jared,

Good idea on the roller profile. I need to make all of them, the one in the photo is a prototype. I will put a nice big angle on the corner of them.

QUESTION: How tight should the...
Forum: Construction Equipment 06-11-2015, 05:08 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

More progress shots! Decided to leave the lower roller shafts round and make little clamps for each end. Will attach them with 2-56 cap screws. Made a little die to form the strap clamps. Turned...
Forum: Construction Equipment 06-10-2015, 10:33 PM
Replies: 9
Views: 9,545
Posted By Rvjimd
Re: First Conversion: Bruder Delta Loader

I don't think it is too slow. I would run it that way once you get it all done, for a while before you change the motors. I think a lot of RC stuff is run way too fast and it kills the scale look. ...
Forum: Construction Equipment 06-10-2015, 11:07 AM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Thanks Tom! Ya I am pretty happy with it. I did the side over just for a better appearance. I have a hard time visualizing stuff like this so I always end up making something to see how it looks...
Forum: Construction Equipment 06-09-2015, 04:38 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Got enough finished to do a first check of the "scale" of my undercarriage to the crane.

http://i1291.photobucket.com/albums/b554/Slotcarjim/IMAG0967_zpsntl794vd.jpg
...
Forum: Construction Equipment 06-08-2015, 08:17 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Parting off one of the spacers for the pairs of side frame rails.

http://i1291.photobucket.com/albums/b554/Slotcarjim/IMAG0966_zpsthvkijgp.jpg


I changed my side rail design a bit, should have...
Forum: Construction Equipment 06-08-2015, 09:21 AM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Here is a shot of the micro stop counter sink tool and pneumatic rivet squeezer. I have a bit of aluminum metal work experience and already had these tools, or I would have NOT attempted to do the...
Forum: Construction Equipment 06-07-2015, 03:36 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Here is my simple fixture to drill the little sections of channel that get riveted into the pocket in each pad.

http://i1291.photobucket.com/albums/b554/Slotcarjim/IMAG0961_zpsteevemtv.jpg
...
Forum: Construction Equipment 06-06-2015, 08:29 PM
Replies: 171
Views: 51,202
Posted By Rvjimd
Re: Dragline Crawler Build

Got four side frame rails made and bolted two of them together. Oh, and if I counted correctly, I got all the pads drilled yesterday. Now all I have left on the pads is riveting the drive dogs into...
Forum: Construction Equipment 06-06-2015, 03:03 PM
Replies: 50
Views: 27,734
Posted By Rvjimd
Re: 1/16 Bucyrus Erie 25B

Jared,

Thanks! I am learning how important it can be to recognize how the order you do things impacts the production of parts.

Jim
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