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welderboy14
Machine Builder In Training
Joined: 30 - July - 2009
 Canada
Posts: 22
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| Posted: 03 - August - 2009 at 22:25 | IP Logged
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hi
heres the towable backhoe i am building i dont have many pics but here are a few videos http://www.youtube.com/user/welderboy14#play/user/3802AC9F51 BC1DDB
i would of posted when i started it but just found out about this web site
all comments and sugesgins welcom
welderboy14
Edited by welderboy14 on 07 - August - 2009 at 20:56
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welderboy14
Machine Builder In Training
Joined: 30 - July - 2009
Canada
Posts: 22
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| Posted: 10 - September - 2009 at 11:35 | IP Logged
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Quote: welderboy14
hi
heres the towable backhoe i am building i dont have many pics but here are a few videos http://www.youtube.com/user/welderboy14#play/user/3802AC9F51 BC1DDB
i would of posted when i started it but just found out about this web site
all comments and sugesgins welcom
welderboy14
just let me know if you guys want pics
i have made a lot of progress
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camdigger3
Senior Machine Builder
Joined: 11 - August - 2005
Posts: 1478
Home Town, State/Province: Wimborne, Alberta
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| Posted: 10 - September - 2009 at 11:50 | IP Logged
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Hmmm You not been paying attention??!? Of course we want pics! 
Especially the newer guys looking for plans and ideas for their own hoe projects!
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Design to 0.001", measure to 1/16", and cut with an axe......
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welderboy14
Machine Builder In Training
Joined: 30 - July - 2009
Canada
Posts: 22
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| Posted: 10 - September - 2009 at 11:57 | IP Logged
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Quote: camdigger3
Hmmm You not been paying attention??!? Of course we want pics!
Especially the newer guys looking for plans and ideas for their own hoe projects!
ok no problum i will try to post some tonight 
____________________
Welderboy14
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camdigger3
Senior Machine Builder
Joined: 11 - August - 2005
Posts: 1478
Home Town, State/Province: Wimborne, Alberta
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| Posted: 10 - September - 2009 at 12:39 | IP Logged
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Your video commentary mentions you had trouble with a 1" twist drill. How fast were you running it and did you step drill or drill a pilot hole?
According to a quick Google search, the optimum speed is +/- 100 sfpm for drilling soft steels like structurals and common HR.
rpm = sfpm x 12 / (Drill dia x 3.14)
rpm opt = 1200/3.14 = 382rpm
Quite frankly, I run my drill press way slower for almost all my drilling 'cause I'm too lazy to change it. IIRC the speed I have mine set on is +/- 250 rpm. I have no issues with cheap discount house twist drills if I step drill in 1/4 - 3/8" steps and use a cutting oil or water soluble emulsion. A keyless chuck makes step drilling a bit less painful too...
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Design to 0.001", measure to 1/16", and cut with an axe......
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welderboy14
Machine Builder In Training
Joined: 30 - July - 2009
Canada
Posts: 22
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| Posted: 10 - September - 2009 at 16:55 | IP Logged
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Quote: camdigger3
Your video commentary mentions you had trouble with a 1" twist drill. How fast were you running it and did you step drill or drill a pilot hole?
According to a quick Google search, the optimum speed is +/- 100 sfpm for drilling soft steels like structurals and common HR.
rpm = sfpm x 12 / (Drill dia x 3.14)
rpm opt = 1200/3.14 = 382rpm
Quite frankly, I run my drill press way slower for almost all my drilling 'cause I'm too lazy to change it. IIRC the speed I have mine set on is +/- 250 rpm. I have no issues with cheap discount house twist drills if I step drill in 1/4 - 3/8" steps and use a cutting oil or water soluble emulsion. A keyless chuck makes step drilling a bit less painful too...
thanks
but i have started using a 1" hole saw that and lots of oil and theirs no problum  . Thanks any way
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kcshawman
Machine Builder
Joined: 16 - August - 2009
 United States
Posts: 131
Home Town, State/Province: Olathe, Kansas
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| Posted: 10 - September - 2009 at 17:24 | IP Logged
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I agree with camdigger3 on the speed.
High speed steel rule of thumb is 400 rpm for 1 inch.
So 800 for .5
1600 for .250
and so on.
I have belt drive so we rarely use optimum rpm.
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Clint ... (I feel more like I do now then I did a while ago.)
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welderboy14
Machine Builder In Training
Joined: 30 - July - 2009
Canada
Posts: 22
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| Posted: 10 - September - 2009 at 17:46 | IP Logged
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heres some pics finaly
if you guys want any more pics just ask
and i will update with pics
and qutions just ask
Ps i am only 14
________________________
welderboy14
Edited by welderboy14 on 10 - September - 2009 at 17:47
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kcshawman
Machine Builder
Joined: 16 - August - 2009
United States
Posts: 131
Home Town, State/Province: Olathe, Kansas
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| Posted: 10 - September - 2009 at 17:48 | IP Logged
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Welderboy14
9th grade. I remember shop and FFA and they built 3 pt blades and I wanted to be in that class. I was doing all that kind of stuff on the farm but was in band also and somehow could not take that class.
If I did not have a Vertical milling machine, lathe, and horizontal band saw I would not even attempt what you are doing. I have been saving metal for my backhoe longer then you have existed. I must say I'm a little envious of what your future could be. I just got my lathe and mill about 6 years ago having taken machine shop and metal working course in college 38 years ago. I have used these machines at the various places of employment over the years but you seldom get to work on bigger items (for your home projects).
Don't wait as long as I did.
After posting this I saw your pictures. Yep pictures are better in someways then video. Looking good.
What type of welder do you use?
Edited by kcshawman on 10 - September - 2009 at 17:51
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Clint ... (I feel more like I do now then I did a while ago.)
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welderboy14
Machine Builder In Training
Joined: 30 - July - 2009
Canada
Posts: 22
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| Posted: 10 - September - 2009 at 18:17 | IP Logged
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Quote: kcshawman Welderboy14
9th grade. I remember shop and FFA and they built 3 pt blades and I wanted to be in that class. I was doing all that kind of stuff on the farm but was in band also and somehow could not take that class.
If I did not have a Vertical milling machine, lathe, and horizontal band saw I would not even attempt what you are doing. I have been saving metal for my backhoe longer then you have existed. I must say I'm a little envious of what your future could be. I just got my lathe and mill about 6 years ago having taken machine shop and metal working course in college 38 years ago. I have used these machines at the various places of employment over the years but you seldom get to work on bigger items (for your home projects).
Don't wait as long as I did.
After posting this I saw your pictures. Yep pictures are better in someways then video. Looking good.
What type of welder do you use?
hey thanks for the cind words 
and just to add to my last post so far i have only use a angle grinder (and lots of cutting wheels), reciprocating saw, drill press, cordless drill, welder and some handtools hammers Etc.
but to answer your qustion about my welder it is a 90amp wire feed and i use lincon 0.35 flux core wire. i got the welder for $199.99
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Thanks
Welderboy14
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kcshawman
Machine Builder
Joined: 16 - August - 2009
United States
Posts: 131
Home Town, State/Province: Olathe, Kansas
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| Posted: 10 - September - 2009 at 18:53 | IP Logged
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I was going to comment about the welding rod or something but with that information I see you are doing fantastic. That's the way I did it until I could not stand it anymore.
I want a plasma torch now about 50 amps and a Wire welder one that cost about 10 times what yours did and a shop about 80 by 120 ft.
Check out Bobs
altenator welder. http://machinebuilders.net/forum/forum_posts.asp?TID=5225&am p;am p;PN=1&TPN=2
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnu mber=93762
I paid $120 for my horizontal bandsaw with sales and promotions ect. I still see these saws going for 170 every now and then. Get one you won't be sorry.
Edited by kcshawman on 10 - September - 2009 at 19:01
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Clint ... (I feel more like I do now then I did a while ago.)
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Cjmac
Machine Builder
Joined: 30 - November - 2008
Canada
Posts: 141
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| Posted: 10 - September - 2009 at 20:31 | IP Logged
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Hi Welderboy14,
Your machine looks good. I watched your youtube video tonight. It looks like you are near a Princess Auto store. The price on the DOM tube isn't actually that bad when you consider the convenience. Maybe you can use a lathe at school to face the pieces after you cut them.
Keep up the good work.
Chris
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camdigger3
Senior Machine Builder
Joined: 11 - August - 2005
Posts: 1478
Home Town, State/Province: Wimborne, Alberta
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| Posted: 11 - September - 2009 at 10:48 | IP Logged
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[QUOTE=welderboy14]
There will be tremendous forces at work behind the pivot of the boom arm of your machine on the main frame both when digging and when lifting a bucket full of dirt. Some consideration should be given to stiffening the cross members at the back of the frame to prevent the crossmembers from bending. Maybe you`ve thought of that already, but I hoped to prevent some anguish. Nothing more disappointing than making such a beautiful job of the rest of the machine and have a catastrophic mount failure... Keep up the good work!
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Design to 0.001", measure to 1/16", and cut with an axe......
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kcshawman
Machine Builder
Joined: 16 - August - 2009
United States
Posts: 131
Home Town, State/Province: Olathe, Kansas
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| Posted: 11 - September - 2009 at 15:01 | IP Logged
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One more cross member on the back of that top channel would help a lot.
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Clint ... (I feel more like I do now then I did a while ago.)
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welderboy14
Machine Builder In Training
Joined: 30 - July - 2009
Canada
Posts: 22
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| Posted: 14 - September - 2009 at 11:38 | IP Logged
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Quote: kcshawman One more cross member on the back of that top channel would help a lot. i will do so. sould i just use the same steel as i have for the top and bottom or sould i use something stronger.
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welderboy14
Machine Builder In Training
Joined: 30 - July - 2009
Canada
Posts: 22
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| Posted: 14 - September - 2009 at 18:34 | IP Logged
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just a little side project i did yesterday. needed a brake from the backhoe.
heres some pics.
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welderboy14
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JoeJ
Sheriff Department
Charter Member
Joined: 24 - December - 2003
United States
Posts: 4954
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| Posted: 17 - September - 2009 at 09:23 | IP Logged
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Grrrrrr, I still can't up load a pic!!!
I have a problem with your mounting on top of the bucket, but I can't get the pic to load to explain it. But I for see you bending the top of your bucket,,,the way your brackets are located and welded to the bucket.
HOPEFULLY,,,someone will see what I'm trying to say and explain it.
__________________
JoeJ 
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Cjmac
Machine Builder
Joined: 30 - November - 2008
Canada
Posts: 141
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| Posted: 17 - September - 2009 at 11:01 | IP Logged
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JoeJ is right.
When the bucket pulls on the earth the forces are transmitted up the sides to the top. You are lifting at the center of the top and the load is concentrated at the two sides. You need a girder across the top of the bucket to transfer the force to where the sick attaches. A piece of heavy pipe or a piece of channel welded face up to the underside of the top of the bucket will make that top plate more rigid.
Is that what you meant JoeJ?
I can send a picture tonight.
Chris
Edited by Cjmac on 17 - September - 2009 at 11:04
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Cjmac
Machine Builder
Joined: 30 - November - 2008
Canada
Posts: 141
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| Posted: 17 - September - 2009 at 18:49 | IP Logged
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Here are a couple of pictures. The first is a friend's excavator bucket. I measured and photographed both his machines while designing mine.
Notice the pipe used as a beam to carry the load from the sides to the ears.
This one is mine for the tracked backhoe. Same idea.
That picture was from when I bought the 3 point hoe attachment. That's why the bucket is full of water. Notice the triangular braces from the ears down to the pipe (beam)
Chris
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kcshawman
Machine Builder
Joined: 16 - August - 2009
United States
Posts: 131
Home Town, State/Province: Olathe, Kansas
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| Posted: 17 - September - 2009 at 19:47 | IP Logged
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I don't have that brace on mine yet. I got some heavy 1" sq. tubing for the smaller bucket that I going to start on. I was hoping my bucket would bend out just a little as it bowed in when welding. I guess that 1/4 inch plate is tougher then I first thought.
I will put some weight on mine and then get off and look at it. If it is bowed where I want it then I'm adding some braces. May put some braces on it even if it is bowed.
That 1 inch heavy tubing I think would work for your bucket also.
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Clint ... (I feel more like I do now then I did a while ago.)
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Topic: homebuilt backhoe
