Author Topic: Banana tip bar  (Read 305 times)

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Offline 660magnum

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Re: Banana tip bar
« Reply #10 on: February 14, 2015, 12:27:55 am »
Boy that Oregon catalog is almost impossible to work with
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
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Offline 660magnum

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Re: Banana tip bar
« Reply #11 on: February 14, 2015, 01:06:09 am »
Boy that Oregon catalog is almost impossible to work with
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline Eccentric

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Re: Banana tip bar
« Reply #12 on: February 14, 2015, 02:07:45 am »
It is ponderous. 
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Eccentric

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Re: Banana tip bar
« Reply #13 on: February 14, 2015, 02:12:28 am »
I've seen more than a few sites with bar info that's incorrect.  Looks like someone did a cut and paste thing (poorly) a while back, and the resulting flawed documents were then reused on other sites without anyone noticing the errors.
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Hoggwood

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Re: Banana tip bar
« Reply #14 on: February 16, 2015, 02:43:13 am »
A side question here fellows.  I've a 16" banana that either came with a 452vl or a 3400.  Bars were off so can't say for sure what was wearing what. 

Upon inspection the bar is wearing a 3/8, 0.050 Oregon76 (?) chain.  There is a ghost image of that number on the drivers and the depth gauge has a laid back profile.  It looks different as the cutters are certainly smaller than an LGX and the 452 is happy pulling that 76.

From what I gather this is long obsolete.  Did Oregon Replace this particular chain with anything in their current line?  I don't know if I want to go full comp. LG/PX as the time is near to replace this one. 

I am naive with respect to the lp chains.

No intent to hijack here.  Always curious.

Thanks guys,

Cory

Offline Eccentric

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Re: Banana tip bar
« Reply #15 on: February 16, 2015, 03:35:02 am »
Oregon 76 is sadly discontinued.  There isn't really any direct replacement.  It is a regular 3/8 pitch (not LP) chain, with full sized drivers and tie straps.  The cutters are lower profile than regular 3/8 pitch, but not as small as LP cutters.  Closer to .325 pitch cutters in height (and a 3/16" file is the correct file for them, as it is with most .325 pitch chain).  I like Oregon 76 on 40-50cc class saws for which there isn't an easy way to run LP (such as my Homelite Super E-Z AOW).  There was both regular and 'safety' versions of 76.  The 'safety' version has the 'shark fins' that we see on many other Oregon consumer/safety chains.  There are loops of 76 (both regular and safety) on ebay from time to time if you want to just get another loop of it for your saw.

Banana bars were indeed OEM on many Echos (and Poulans).  I've seen NOS Echo branded Oregon laminate and 3 rivet replaceable tip bars wearing the 'guard tip' (which was the 'banana' version of their 3 rivet replaceable tip).  Your 3400 and 452 both come from the era where those two manufacturers were installing 'banana' bars (and both saws use the same mount).

Oregon 76 was a good match for your 452.  It can run 3/8 pitch chain, but would probably be happier with .325 pitch come chain replacement time.  That would of course require a sprocket and bar change at the same time.  If you don't get too aggressive with the raker hight, it'll be fine with Oregon 72LGX or 72LPX.  Don't think you need to go with skip on a 16" bar with that saw.  The 3400 will run a 16" bar with 72LGX or 72LPX without breaking a sweat.
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Hoggwood

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Re: Banana tip bar
« Reply #16 on: February 16, 2015, 10:00:15 am »
Thanks for the details Aaron. 

I appreciate it.

Offline Cut4fun .

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Re: Banana tip bar
« Reply #17 on: February 16, 2015, 01:18:56 pm »
There is a thread on the oregon 76 chain in the bar chain area here. I had a lot of NOS 76 chain and stihl chain in same type stuff.  I tried the 76 on a new 550 with 20".   Still wasnt happy. Just to long of bar for 50cc.
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Offline Eccentric

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Re: Banana tip bar
« Reply #18 on: February 16, 2015, 02:50:44 pm »
There is a thread on the oregon 76 chain in the bar chain area here. I had a lot of NOS 76 chain and stihl chain in same type stuff.  I tried the 76 on a new 550 with 20".   Still wasnt happy. Just to long of bar for 50cc.

IIRC there was also McCulloch branded Oregon 76 for a time as well.  Do you still have that NOS 76 chain Kevin?
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

Offline Cut4fun .

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Re: Banana tip bar
« Reply #19 on: February 16, 2015, 02:53:56 pm »
There is a thread on the oregon 76 chain in the bar chain area here. I had a lot of NOS 76 chain and stihl chain in same type stuff.  I tried the 76 on a new 550 with 20".   Still wasnt happy. Just to long of bar for 50cc.

IIRC there was also McCulloch branded Oregon 76 for a time as well.  Do you still have that NOS 76 chain Kevin?

Nope it was all sold for the chassis for race chains.  72 cutters used on 76 chassis.

You can still get the SL if you search real close.  I passed on a roll of LG last year year before. Dont know if they still got it or not.
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