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Search took 0.00 seconds. Search: Posts Made By: Jw.
Forum: General Discussion 05-08-2013, 10:17 PM
Replies: 10
Views: 3,467
Posted By Jw.
Re: Question about scale nuts and bolts.

KNUPFER Modell in germany. For those tamiya metric sizes.

http://translate.google.com/translate?sl=auto&tl=en&prev=_t&hl=en&ie=UTF-8&eotf=1&u=http://www.knupfershop.de/shop/&act=url


US...
Forum: Construction Equipment Tech 04-09-2013, 05:40 PM
Replies: 31
Views: 21,485
Posted By Jw.
Re: So I built a hydraulic pump today

This might be of some help.

http://www.rlhudson.com/O-Ring%20Book/designing-dynamic.html

Look at rotary seals and table 53. It lists dimensions for a 1/8 shaft using a round style o-ring.
Forum: Construction Equipment Tech 04-09-2013, 04:09 PM
Replies: 31
Views: 21,485
Posted By Jw.
Re: So I built a hydraulic pump today

What kind of o-rings are you using?

Have you looked in to square type o-rings? I believe this is the type they would be using on these pumps. Have anyone taken apart a Jung pump on here? I would...
Forum: Metal forming & tools 01-14-2013, 02:05 AM
Replies: 21
Views: 19,867
Posted By Jw.
Re: Sherlie /Taig /Maxnc or bench top router ???

I don't know about open or closed loop but this is what I can share. The biggest factor to me when choosing a small mill was the machinable area. This is what I have come across. I am just a beginner...
Forum: Metal forming & tools 01-02-2013, 01:06 AM
Replies: 11
Views: 3,686
Posted By Jw.
Re: I want 1

Hey here's a 5 axis machine. It just has a Sherline cnc rotary table between the column and the headstock. Overall it doesn't look to be a sturdy machine but its a little cheaper than a Mazak.
...
Forum: Construction Equipment Tech 12-31-2012, 09:09 PM
Replies: 28
Views: 32,709
Posted By Jw.
Re: How to make hydraulic valve?

Thanks! I eventually will be attempting this myself at some point. What did you end up having as a diameter for your valves? I read through your thread and you ended up making them smaller than you...
Forum: Construction Equipment Tech 12-31-2012, 03:58 PM
Replies: 28
Views: 32,709
Posted By Jw.
Re: How to make hydraulic valve?

Please excuse my poor cad abilities as I'm still trying to learn. This is the manifold I quickly drew up to help explain.


...
Forum: Construction Equipment Tech 12-28-2012, 06:11 PM
Replies: 28
Views: 32,709
Posted By Jw.
Re: How to make hydraulic valve?

Valves for our applications are normally fall under the 5/4 port 4 way 3 position setup. As in this picture below trying to explain the ports. Its of a spool valve to get backward and forward control...
Forum: Construction Equipment Tech 12-28-2012, 04:19 PM
Replies: 28
Views: 32,709
Posted By Jw.
Re: How to make hydraulic valve?

Hey Jazza check out Trucker47's thread on his loader. Page 4 and Page 5 has photos of his whole hydraulic setup he homemade.
http://www.rctruckandconstruction.com/showthread.php?t=3260...
Forum: Construction Equipment 11-27-2012, 05:38 AM
Replies: 23
Views: 10,682
Posted By Jw.
Re: Liebherr R934

Great work on the body! How did you get such good detail in all those pieces? What machine are you using make all your cuts? Did you make your slew gear and rings? Have you thought about swapping...
Forum: Construction Equipment 11-15-2012, 12:15 AM
Replies: 366
Views: 294,122
Posted By Jw.
Re: D8R +463 in 1/5,6

The fifth picture down of the cat 374d lme. Is that a Hendrick Seipt model? Doesn't Hendrick Seipt from THS Truckmodelle work for Premacon? It looks like one of Mr. Seipt's one off cats. Do you have...
Forum: Mechanical tech 11-14-2012, 01:12 AM
Replies: 2
Views: 2,176
Posted By Jw.
Integy complete axle set

Has anyone seen or used these before? They look promising and the price is decent. I was considering rc channel for a front drive axle until I found these. I guess the main question here would be,...
Forum: Construction Equipment 11-01-2012, 03:39 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, 02:27 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, 01:50 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, 01:27 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, 03:55 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, 07:12 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, 10:37 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, 10:22 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, 10:13 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, 09:47 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 10-28-2012, 06:11 PM
Replies: 503
Views: 408,328
Posted By Jw.
Re: CAT 374D L

Awesome work on the stick and your undercarriage! Speaking of track pads. How long are your track pads?


64.25mm sounds good. That's after the 900mm(35inch) track pads scaled down? That's what...
Forum: Construction Equipment Tech 10-26-2012, 03:28 PM
Replies: 7
Views: 3,401
Posted By Jw.
Re: Gearmotor help

Hey Tommy, I found these that are sorta close.

http://www.lynxmotion.com/p-580-planetary-gear-motor-120vdc-2311-64rpm-4mm-shaft.aspx

Oddball gear motors of all kinds can easily be found by ebay...
Forum: Construction Equipment 10-19-2012, 07:04 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...
Showing results 1 to 25 of 32
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