Author Topic: Welding Chainsaw Parts (Read 1385 times)

tommyhnavix · « **on:** February 09, 2012, 08:13:31 pm »

Anyone have information about welding chainsaw parts?

Aluminum, Mageneseum, or alloy of both??

Wonder if this stuff would work?

http://www.aluminumrepair.com/

What have you used or tried?

Al Smith · « **Reply #1 on:** April 08, 2012, 10:00:08 am »

It could be any number of alloy depending on the brand and age .Stihl uses a type of die cast that has a certain amount of magnesium in it .Older Homelites might be all magnesium depending on the model .

I don't have a heli-arc rig so I really don't know but what few I've had welded the welder just experimented with different filler rods until they found the right one .

My buddy Ron owns a repair shop .Good machinest ,good welder ,lousey electrician . Works out well for both of us .

Cut4fun_ · « **Reply #2 on:** April 08, 2012, 10:10:27 am »

Quote from: tommyhnavix on February 09, 2012, 08:13:31 pm

Anyone have information about welding chainsaw parts?

Aluminum, Mageneseum, or alloy of both??

Wonder if this stuff would work?

http://www.aluminumrepair.com/

What have you used or tried?

Another thread with some info http://chainsawrepair.createaforum.com/ported-saws/welding-cylinders-to-fix-them/

Cut4fun · « **Reply #3 on:** September 26, 2012, 01:28:12 pm »

3000 FPS you are into this welding now with good results. Anything you want to share?

3000 FPS sent me a note that he cant do pics etc for another 2 weeks with internet he is on right now for posting here. Thanks for info.

3000 FPS · « **Reply #4 on:** October 13, 2012, 02:17:41 am »

I have a Miller Tig welder and have been doing some magnesium welding on chainsaw parts. I have welded various parts from clutch covers to crankcases. I have welded I believe about 12 chainsaws as of this time with some pretty good results.

So here is what I am doing. First off I am not using any kind of aluminium rod and it will not work at all. The rod I am using is magnesium and is so close in composition that when the welding and finish work is done you cannot see the difference in the two metals. The magnesium rod I use is called AZ92A.

The tungston I am using in the torch is 2% ceriated 3/32 in size. I like using this because it takes less amperage to get the arch going. I use the 3/32 size because alot of chainsaw parts are not very thick and it does not take much amperage to weld. I have found that it takes much less amperage than aluminium.

I usually set up the Miller tig welder just like I am going to do aluminium but it uses less amperage which is controlled either by foot on by a thumb control. I am also using 100% argon gas.

I also have found that sand blasting the part first cleans it pretty good and helped to eliminate contamination. Chainsaw parts get soaked in oil and it is very hard to eliminate all of the contamination. So if while I am welding and I run into a bad section I will stop and clean the area again with a stainless brush and then re-weld it again. I have done this up to 3 times on some parts that I have welded on to get rid of the contamination and to get a good weld. If it is a crack I am welding together I will weld it from both sides.

Another thing I have found is the torch needs to be held closer to the part to keep a good steady arch going. In some cases if the part is thin and on an edge I will use a backing material that will not stick to the magnesium. This will keep the puddle from falling away.

So here are a few before and after pictures.

3000 FPS · « **Reply #5 on:** October 13, 2012, 02:22:22 am »

Here is picture of a hole punched in the case from the chain adjuster. I know that alot of you have seen this many times. I also checked this with water to make sure it would no longer leak. I had to weld this 3 times before I eliminated all the leaks.

3000 FPS · « **Reply #6 on:** October 13, 2012, 02:43:53 am »

One more set of pictures. This is a clutch cover from a J-red 670 that had a crack in it. I also included a picture of my welder in case you wanted to know what I was using.

Cut4fun_ · « **Reply #7 on:** October 13, 2012, 07:38:41 am »

I tell you if I would have thought about it and known before I did all my redneck fixing in the past you would have got alot of my stuff. I rednecked a 330 where bar adjuster punched through oil tank, 3750 case where it was cut for bow bar, 475, 415 broken rear av mounts. 2 cracked 272 covers.
Maybe someday if the rednecking gives up the ghost.

Also Thank You for getting back and sharing your welding of these parts with us.

Kevin

3000 FPS · « **Reply #8 on:** October 13, 2012, 10:51:36 am »

I just picked up another 335 that has a crack in the side of it where the bar studs come through and is now leaking oil. When I get around to splitting the case and welding this up I will post the before and after pictures of it. I like picking up these saws because they are usually very cheap and require more labor then parts to repair.

Cut4fun_ · « **Reply #9 on:** October 17, 2012, 08:32:28 pm »

I have 2 inner dawgs on poulan 505 saws that are broke in the thin area in the middle now. Seems like a weak area IMO. Wondering if it is feasible to weld dawgs back together?

660magnum · « **Reply #10 on:** October 17, 2012, 08:47:30 pm »

The spikes are up around 45 Rc hard

You could stick weld them with low hydrogen rod. But I would try to get them hot, up around 500 degrees first and then post heat them after welding and let the cool slowly.

3000 FPS · « **Reply #11 on:** October 17, 2012, 09:25:43 pm »

Can you post a picture of the spikes showing where the break is.

Quote from: Cut4fun2 on October 17, 2012, 08:32:28 pm

I have 2 inner dawgs on poulan 505 saws that are broke in the thin area in the middle now. Seems like a weak area IMO. Wondering if it is feasible to weld dawgs back together?

Cut4fun · « **Reply #12 on:** October 18, 2012, 06:37:53 am »

Quote from: 3000 FPS on October 17, 2012, 09:25:43 pm

Can you post a picture of the spikes showing where the break is.

Also if you need help on quoting post you might want to read this. Has 2 different ways to do so. http://chainsawrepair.createaforum.com/general-discussion/%27quote%27-not-working/msg12353/#new

I'll get you you some pics later today I hope. Up to my neck in breakdowns right now to fix. $:-\$

Cut4fun_ · « **Reply #13 on:** October 18, 2012, 04:05:03 pm »

I remembered

There is no way I would try using my stick welder on this.

inner poulan 415 425 445 475 505 jonsered 2077 2083 small dawgs.

3000 FPS · « **Reply #14 on:** October 18, 2012, 04:13:23 pm »

Oh I am sure I could do those on my Tig welder. If you would like it is not a problem.
Roger

Cut4fun · « **Reply #15 on:** October 18, 2012, 04:49:21 pm »

Quote from: 3000 FPS on October 18, 2012, 04:13:23 pm

Oh I am sure I could do those on my Tig welder. If you would like it is not a problem.
Roger

I bet you could too.

Jacks shows they are still for sale and not NLA like I thought.

Out of curiosity I went to Jacks small engines and I can still get new for $5 a piece

. I guess I will just add some to my next big order to absorb the $7.99 shipping. PN# 503424101 SPUR $5.00

3000 FPS · « **Reply #16 on:** October 18, 2012, 04:53:59 pm »

Quote

I bet you could too.

Jacks shows they are still for sale and not NLA like I thought.

Out of curiosity I went to Jacks small engines and I can still get new for $5 a piece . I guess I will just add some to my next big order to absorb the $7.99 shipping. PN# 503424101 SPUR $5.00

Wow you cannot beat that. You could not even ship them to me for that much.

Cut4fun · « **Reply #17 on:** October 18, 2012, 05:16:39 pm »

Put this [quote ] words here and [ /quote] Put what you want quoted in middle of those.

Then it will look like this when done right

Quote

words here and

3000 FPS · « **Reply #18 on:** October 18, 2012, 05:48:49 pm »

Ok I will get it, just a matter of time before I make all the mistakes and I find out the right way.

3000 FPS · « **Reply #19 on:** October 27, 2012, 10:11:19 pm »

For those of you who may interested in welding this is an 8500 crankcase hit by a chain. I wanted to show this because it can demonstrate how an edge can be built back up by using a material behind it that will not stick to the magnesium while welding. If you do not do this with thin castings such as on this saw it will just fall away when the puddle forms.

News:

Author Topic: Welding Chainsaw Parts (Read 1385 times)