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Are FOP really progressive depth raker generators?

Discussion in 'Chain Sharpening' started by BobL, Nov 9, 2009.

  1. Ranchers-son

    Ranchers-son ArboristSite Member

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    BobL I have a problem/question I lowered my RA to 6* my TPFA is 25* My chain no longer makes a wide enough cut and and drags so much it overheats the chain in two cuts 18" burr oak Stalled the saw to. Thought it was cutting too aggressive until I tried to pull out and it stalled in open cut. I was cutting cookies so their were no external forces on the log. What could cause this? I've learned a lot about sharpening from your post but the more I learn the less I seem to know!
     
  2. Ranchers-son

    Ranchers-son ArboristSite Member

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    Never mind OPERATOR ERROR! I had hand filed this chain 3 or 4 times, switched to a chain sharpened with grandburg ( which I do every 3 or 4 filing) and cuts great. Looked closely and seen that my TPFA was rounded, not as good as I thought I was!
     
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  3. Wiersy111

    Wiersy111 ArboristSite Lurker

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    Wow is all I can say. I can't free file worth a crap but my son gets em extremely sharp. I think it's his form of OCD. He can't stand to watch me file so he just takes over which doesn't bother me especially on the 36" bars. Now I am going to take what I have learned here and sneak a few chains in on him and see if he notices. I'm sure it will take some trial and error to get all this down pat. Thanks BobL!
     
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  4. SeMoTony

    SeMoTony Addicted to ArboristSite

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    Thanx Bobl for what my buddy is looking for that is beyond my ability to adequately articulate to him
     
  5. SawTroll

    SawTroll Information Collector

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    I know this is an old post, but as the thread still is active, I comment on it anyway.

    That method may well work, if you are taking the correct measurement, meaning that you need to be precise about what "gullet width" is. I assume you really refer to the distance between the top of the raker and the "point" of the cutter).

    Regardless, a major inherent problem with the raker guides that rest on two cutters remain though - a good result depends all the cutters being exactly the same length/height (which is ideal, but not very practical).
     
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  6. romad10

    romad10 Recon Observe Mark And Destroy

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    This is some good stuff here.. WOW! I cant w8 to give it a try and see what my current measurements are FIRST.. so i can laugh at myself for how bad i currently do it and then make them right!
     
  7. PogoInTheWoods

    PogoInTheWoods Pissed AS Patriot

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    Sorry if this has already been posted here, but I wasn't gonna read the whole thread again to find out!

    So....

    Since the FOP is basically NLA, get the Husky depth gauge. Available for .325, 3/8, 3/8mini(LP), and .404 but won't work on humped safety chain. Only way to go for hand filing.

    0401172249_resized.jpg

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  8. 2strokenut

    2strokenut One nut loose

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    still kinda the same as a "fop" as the tooth get shorter the angle decreaser so the chain has to much bite.
     

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