Stihl 090G .404 gear source

[Bill G]

Over the years 090G owners have found the .404 gear hard to find and 1/2" chain just as hard. Over the last few years I myself have fought the battle. It is very sad to see a saw sit unused. If you review past threads and posts you will see the frustration felt by many owners. There have been members post that they had a shop that could build the gears. I am not sure if they did. I hope so. If they did please post so we all know. I have made countless trips to various machine shops in serach of one that will take on the project. I have been very discouraged as I left each one with the answer.

THEN FINALLY

I found a shop that will take on the project. The bad part is the price. It will run $125 each (shipped) and that is with a large order. I cannot afford to take on this cost without confirmed orders. If I can put together a large enough order obviously the price can go down and that will be passed on. If ther are guys and gals serious about buying .404 gears please post.

As for placement in the correct forum I am not sure as I want this to be a help post and not a profit one

Bill

 

[spacemule]

Hmm, for that cost I would be looking at buying a lathe and mill and learning the art of machine work.

 

[Al Smith]

I was going to build one for Butch,some years ago but I never did.The problem is having one for a pattern.They are not a regular square cut spur.
Another problem is the stub shaft size regarding making a spline drive to use in conjuction with a large splined rim socket.

I have no doubt that if I had something to work from,I could in fact make one.Then too,it takes me about 4 hours on just a regular square cut spur.

We had discused it before but the best bet would be a cnc machine and make a run of about 50 or so.Those things sold for about 50 bucks when you could still get them from Stihl.

 

[Al Smith]

Here is another thought Bill.You could possibley use a 25 MM bore harvester sprocket with a bushing.I have no doubt that an 090 G with over 6 cubic inch displacement and 2 to 1 reduction could easily handle an 11 or 12 tooth .404 sprocket if there is physically enough room to mount it.Of course a person would have to rework the bar end to make it work properly.

 

[BostonBull]

I am not sure what the big deal is.

Part number.....1106 640 2015 Which is a .404 7T sprocket for an 090is still available from Stihl for $19.35.

I would be happy to order one for anyone who is interested.

 

[Madsaw]

Boston Bull,
Bill is talking about the 090G the gear drive version. Its a whole differnet animal on the drive sprocket.
Here is a thought would a water jet setup cut theses out? Just a thought and if so it might be a cheaper way to produce them.
Bob

 

[thomas72]

I think the best bet for high production and cost would be to make either a powder metal press mold, of just a die cast mold. Then their would me just little clean up, and machining out the correct shaft size. I would contact some metal foundries and see how much it cost. I will also try to contact a local foundry and see if they can do it and how much.

 

[Dadatwins]

Over the years 090G owners have found the .404 gear hard to find and 1/2" chain just as hard. Over the last few years I myself have fought the battle. It is very sad to see a saw sit unused. If you review past threads and posts you will see the frustration felt by many owners. There have been members post that they had a shop that could build the gears. I am not sure if they did. I hope so. If they did please post so we all know. I have made countless trips to various machine shops in serach of one that will take on the project. I have been very discouraged as I left each one with the answer.

THEN FINALLY

I found a shop that will take on the project. The bad part is the price. It will run $125 each (shipped) and that is with a large order. I cannot afford to take on this cost without confirmed orders. If I can put together a large enough order obviously the price can go down and that will be passed on. If ther are guys and gals serious about buying .404 gears please post.

As for placement in the correct forum I am not sure as I want this to be a help post and not a profit one

Bill

Good for you for finding a source Bill, I know there are a lot of these saws out there that are still in use. I have one but the dang thing is so heavy and 1/2" chain is a pain. I wonder if Baileys would consider getting involved with the machine shop and use their distribution power to market these things. I have a feeling there are a lot more users of these saws out there besides the ones on this forum. My 090g is more of a novelty item with the 1/2" chain but I would probably use it more set up the .404.

 

[BostonBull]

Boston Bull,
Bill is talking about the 090G the gear drive version. Its a whole differnet animal on the drive sprocket.
Here is a thought would a water jet setup cut theses out? Just a thought and if so it might be a cheaper way to produce them.
Bob

I apologize. Should have read more closely...didnt see it was the "G" 1109 series.

 

[Al Smith]

I think the best bet for high production and cost would be to make either a powder metal press mold, of just a die cast mold. Then their would me just little clean up, and machining out the correct shaft size. I would contact some metal foundries and see how much it cost. I will also try to contact a local foundry and see if they can do it and how much.

That would be an option, however the cost of making a sintered metal die would be costly.

The great thing about CNC is the fact that once you get a program written correctly,you could make one or a thousand .Speculating,it's doubtfull the demand world wide would exceed a hundred,probabley less.

To be quite honest,figuring the time involved ,$125 is not out of line.

Most shops locally ,including myself,figure at least $55 to $60 per hour on regular machine work and around $70 to $90 for CNC.A CNC machine will do more work in 1 hour than I can do in three days on a Bridgeport mill and a monarch lathe .

 

[hoss]

Randy's engine repair can make them for about $50.00 apiece if you send him the original. I have had him make me one in .404 for my homelite 990g and one for my 775g. I have been very pleased with the quality and durability, especially on the 990 wich is 112cc and 3:1 underdrive. It's been a little while since I ordered one but I'm sure they still can be had. I don't know how different the sprocket is on an 090g but if you send it to Randy he will let you know right away. Turn around time for mine was about 2 weeks. The number for Randy's shop is (937)-927-5429. I hope this helps.

 

[Al Smith]

Not to dispute your findings,I have dealt with Randy myself and have no problems.

If you look at that picture I posted of an 090G spur and compare it with the spur from a Homelite you will see a vast difference in the way it is made.

Rather than a simple square cut spur,Stihl as they normally do,complicated things by having the spur with the backer rim built as one unit.

On Homelite and McCulloch spurs for gear drives,the inner and outer backers were seperate from the spur.This greatly simplifies the ease of making one.

This of course is not to say that a similar design could not be used on an 090G,but I really don't know having never seen the spur up close.

 

[TALLGUY]

Great Infomation

I have been searching this site in search if this information on gears/sprockets. I have an Homelite XP1100 gear drive with a 1/2" very worn out spur sprocket and would like to change it out to .404. I really would like to put a rim gear on the saw. I found a picture of the adapter that would be needed to drive a rim. If anyone has this piece for driving a rim gear maybe something like that could be adapted to the 090g. If I find the time I want to layout the adapter and find a machine shop to make one to try it on my homie. I keep thinking something like that should be able to be made for the 090 also. This would allow for multiple pitch options and multiple teeth options as well.
BTW this piece is simply a bushing with the teath to adapt to the teeth of the rim with the correct hole to fit the shaft with the keyways cut into it.

 

[Al Smith]

I .
BTW this piece is simply a bushing with the teath to adapt to the teeth of the rim with the correct hole to fit the shaft with the keyways cut into it.

Wherin the problem lies is the thickness issue between a 19/32" shaft[McCulloch] or I think 9/16" on a Homie and the internal of a rim socket.I don't think you would have enough metal to cut in the keyway for the shaft.

I think the 090G is is 14 mm,but I'm not sure.

 

[Al Smith]

Stop the presses! In looking over this subject,there might just be enough "meat" to hold the keyway.The picture is a seven tooth 1/2" rim superimposed over a McCulloch 7 tooth spur.How'bout that.

 

[TALLGUY]

http://new.arboristsite.com/showthread.php?t=26597&highlight=1130G+SPROCKET MacDaddy posted a picture in this thread of the gear im refering to.
Greg

 

[Bill G]

Hmm, for that cost I would be looking at buying a lathe and mill and learning the art of machine work.

I have the Clausing lathe and the Bridgeport mill is down the road. Let me know when you can come by and turn them out.

Bill

On another note it is going on 3AM here and I am going on about 6HRS sleep in 2 days so I will need to respond later. I was trying to help folks out but I guess it was not seen that way.

 

[deadtrees]

re; sprocket

Bill, check your PM.

 

[Al Smith]

Hmm, for that cost I would be looking at buying a lathe and mill and learning the art of machine work.

It was vey thoughtful of Bill to make this information known.

Having said that and in reference to buying a lathe etc.,a little inventory perhaps may be in order.This is just the value,more or less of my stuff.

Monarch 10" EE toolmakers lathe,$2500 to 10 thou .Bridgeport mill,$1500 to 5 grand.Rotary plate indexer ,$100 to $300.Tool holders,tooling,endmills
micrometers,carbide inserts,3 to 5 grand,minimum.The building to house them in 60 by 70 feet,value 68 thou.Taxes,insurance,up keep,utilities 1500 to 2 g's per year.

Once again,there is no free woodpile:hmm3grin2orange:

 

[Bill G]

I am going to try to post some pics of a gear for the 090. It was very late last night when I took them. At the time I grabbed a 1/2" instead of a .404 but the design is the same. Hopefully in the pics you can see the complexity of the design. It is not as simple as the Mac and Homelite gears. I will also post a picture of a Homelite and a Mac .404 gear. Later tonight I will post a pic of the rim adapter.

Bill