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  1. #1
    Join Date
    Jun 2008
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    maddington
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    Default Your opinion please

    I have been making laminex benchtops but when I trim them with the router(a Ryobi 4RT1250vn has a half inch shaft-- very New) I get a scraping from the blade on the laminex. I think the shaft may be bent . This happened on previous attempts damaging the face Thinking the edge was not at 90 degrees to the top I brought a pattern bit (torquata)to get a strait edge at 90 degrees . After usig the same bit to do the edging Damage occurred to the edging When the bearing showed to be damaged .I have now change to the shorter bit and have the minium length of blade showing What do you think thanks in advance. Desparate!

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  3. #2
    Join Date
    Jul 2005
    Location
    Oberon, NSW
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    63
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    Default

    Are you absolutely 100% certain that the edges were machined perfectly square to the top before laminating?

    (Just eliminating the obvious.)
    I may be weird, but I'm saving up to become eccentric.

    - Andy Mc

  4. #3
    Join Date
    Apr 2009
    Location
    Gosford
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    56
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    165

    Default

    are you using a bearing tip cutter. what size is the cutter

  5. #4
    Join Date
    Jun 2008
    Location
    maddington
    Posts
    6

    Default Yes.

    Quote Originally Posted by Skew ChiDAMN!! View Post
    Are you absolutely 100% certain that the edges were machined perfectly square to the top before laminating?

    (Just eliminating the obvious.)

    Yes I have checked this .Also it happened on more than one occassion I reread my thread and I said the shalf may be bent I did mean the shaft of the router may be bent . well thats the way I am thinking.

  6. #5
    Join Date
    Mar 2008
    Location
    Lambton, Newcastle, NSW, Australia
    Posts
    4,957

    Default

    If the shaft was bent it would shake the sh... out of you. Maybe the bearing on the cutter is the wrong diameter (too small)
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  7. #6
    Join Date
    Jul 2005
    Location
    Oberon, NSW
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    63
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    Default

    If the bearing was too small then I'd expect it to be scraping for the full width of the blade, not "tapering off" like that.

    I agree about a bent shaft vibrating, though.

    Dean, do you have access to another router you can try instead?
    I may be weird, but I'm saving up to become eccentric.

    - Andy Mc

  8. #7
    Join Date
    Jun 2008
    Location
    maddington
    Posts
    6

    Default No.

    Quote Originally Posted by Skew ChiDAMN!! View Post
    If the bearing was too small then I'd expect it to be scraping for the full width of the blade, not "tapering off" like that.

    I agree about a bent shaft vibrating, though.

    Dean, do you have access to another router you can try instead?

    No I dont but I did buy a second Pattern maker and that two had the same result .But it does vibrate to the extent that it does vibrate the depth adjustment undone if the speed was adjusted to the max.The reason it doesnt cut the whole width is because I now using a shorter trimming bit and using the very tip of the cutting edge and the bearing is fitting just below the laminex

  9. #8
    Join Date
    Feb 2007
    Location
    Adelaide
    Posts
    595

    Default

    One other variable that you need to watch is whether you are holding the base of the router flat on the top of the bench. A tilt upwards of the base could put the cutter in touch with the side of the laminate - just the same as if the corner were not machined accurately square.

  10. #9
    Join Date
    Jan 2008
    Location
    New Zealand
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    214

    Default

    Try running 1-2 layers of masking tape along edge where the bearing would run along. This should allow the laminex overhang a fraction which should be easy to sand flush.

  11. #10
    Join Date
    May 2009
    Location
    tasmania
    Posts
    116

    Default

    I think I would be resorting to the tried and true method of using a file rather than a router. It seems a bit of a heavy duty tool to be using on laminex edging. Basically all you do is run the file down over the edge you want to trim and keep working your way along ...

  12. #11
    Join Date
    Dec 2005
    Location
    South Australia
    Posts
    4,475

    Default

    Are you using a 45deg cutter or a staight cutter

  13. #12
    Join Date
    Feb 2006
    Location
    Kentucky, USA
    Age
    78
    Posts
    848

    Default

    How old is the router? Its worn bearings can allow such play. Dirty Collet can allow alignment variances, etc. Could be sever other factors. Just throwing thoughts your way. BTW I have bought some expensive bits that are not up to snuff, so...?

  14. #13
    Join Date
    Nov 2006
    Location
    Bendigo Victoria
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    Default

    It could also be adhesive stuck to the cutting edge therefore sticking outside the diameter of the bearing.

    The other thing to watch out for is to adjust the bit so that there is the minimum of cutting edge overlapping, the more overlap the more chance of this happening.

  15. #14
    Join Date
    Jun 2008
    Location
    maddington
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    6

    Default So far.

    Quote Originally Posted by Big Shed View Post
    It could also be adhesive stuck to the cutting edge therefore sticking outside the diameter of the bearing.

    The other thing to watch out for is to adjust the bit so that there is the minimum of cutting edge overlapping, the more overlap the more chance of this happening.


    This is what I have been doing of late to get to the next piece.But on Monday I brought another router , the same type to compare but this router is showing the same symtoms exaxtly the same ,vibrates when you turn the speed up to its max .I havent done any trimming as yet .will have to wait till next weekend .But at this stage its indicating both the bits ,both torquata bits. with both bits when you turn it on they both wobble at the end as the machine slows down to almost stopped .A third bit from Bunnings does not wobble All three bits are 1/2 inch shafts Does this sound right .Thanks to all that have replyed at this stage

  16. #15
    Join Date
    Jun 2008
    Location
    maddington
    Posts
    6

    Default

    Quote Originally Posted by China View Post
    Are you using a 45deg cutter or a staight cutter

    Sorry I did not reply all bits are angled but I wouldnt say they were 45 degrees

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