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Search took 0.00 seconds. Search: Posts Made By: Jw.
Forum: Construction Equipment 11-01-2012, 02:39 PM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

Thanks modelman! Casting the hinge pin holes is a brilliant idea. Saves so much more machining time. I will try to incorporate that in to my next molds. What's the strength of the epoxy your using?...
Forum: Construction Equipment 10-31-2012, 01:27 AM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

I did some research on the plaster of paris and its moisture content. The plaster is calcium sulfate hemihydrate(contains water). So yes molten metal plus water equals mold failure and or a steam...
Forum: Construction Equipment 10-31-2012, 12:50 AM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

Ah yes the shrinkage problem :D I designed my track pad and links .015" per inch oversize. To account for the 3/16" shrinkage per 12 inches for aluminum that I was going to use. Now though I will be...
Forum: Construction Equipment 10-31-2012, 12:27 AM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

It would be awesome if I get this figured out because I would like to share it with everyone. I've been looking at all you guys build all these great builds for a while now and when ever someone...
Forum: Construction Equipment 10-30-2012, 02:55 AM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

Thanks Neil. His videos were some of the first I came across when I first looked into casting. Lots of cool videos on sand casting. I'll definitely use this method for many other parts I need to...
Forum: Construction Equipment 10-29-2012, 06:12 AM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

10 to 15 pours per mold I am guessing. I was going to use aluminum A356 but I'm concerned about durability so I will be using Zinc Alloy 27. It is stronger and has a tensile strength of cast iron.
Forum: Construction Equipment 10-28-2012, 09:37 PM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

http://i784.photobucket.com/albums/yy130/jp7986/2012-10-25_22-07-03_5.jpg
Second attempt was a failure again but I'm getting closer. Air bubbles all over and it cracked.

...
Forum: Construction Equipment 10-28-2012, 09:22 PM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

http://i784.photobucket.com/albums/yy130/jp7986/2012-10-19_19-50-33_382.jpg

http://i784.photobucket.com/albums/yy130/jp7986/2012-10-20_00-35-42_863.jpg
...
Forum: Construction Equipment 10-28-2012, 09:13 PM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

I would appreciate those links very much :) I sorta skipped over sand molds because I thought the undercut on the track pad would be impossible to mold. I've looked into the lost wax and everyone...
Forum: Construction Equipment 10-28-2012, 08:47 PM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

Thanks Madda. It took me forever trying to get that thing done. Lots of head scratching and late nights watching you tube on machining. There's machining videos on there for everything it seems. That...
Forum: Construction Equipment 10-19-2012, 06:04 AM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

First attempt at making a 2 piece mold for the track pad and link bolted together out of a plaster cast. Since I don't have a cnc machine.

I was not sure if it was going to work and it didn't. It...
Forum: Construction Equipment 10-19-2012, 05:42 AM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

Second bolt pattern. Now this one I was dead on for sure this time and it came out perfect.

http://i784.photobucket.com/albums/yy130/jp7986/2012-09-26_17-27-53_706_zps373430cc.jpg

44 holes...
Forum: Construction Equipment 10-19-2012, 05:34 AM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

Start of the bolt pattern. First time using a rotary table. Didn't know till half way through I was .010 off center. Its barely noticeable. I'm not liking this latest version of photobucket at all. ...
Forum: Construction Equipment 07-09-2012, 11:07 PM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

Thanks guys.



My first choice was going to be the 374 but just before I was going to start my plans CCM just released their 1/50 390D LME model so I went with that instead.



No cad just...
Forum: Construction Equipment 07-08-2012, 11:45 PM
Replies: 29
Views: 20,606
Posted By Jw.
Re: 1/14 CAT 390D LME

Undercarriage so far.
http://i784.photobucket.com/albums/yy130/jp7986/482.jpg
Forum: Construction Equipment 07-08-2012, 11:34 PM
Replies: 29
Views: 20,606
Posted By Jw.
1/14 CAT 390D LME

Hi Guys, I have recently Started building an all aluminum 1/14 scale 390D LME. Progress will be slow as I am making everything on a manual mill and lathe and this will be the first time I have ever...
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