Router Bit Depth Stop Cushions / Coussins de profondeur pour fraises

Comme vous l’avez sans doute remarqué, la plupart des mandrins de toupie (défonceuse) sont coniques, du moins les plus gros modèles. Cette forme a été conçue pour serrer davantage la tiges des fraises pour une prise optimale. Toutefois, si les fraises sont insérées au fond du mandrin, le serrage provoque un glissement du cône et la prise est moins efficace. Les tiges peuvent être endommagées, et au pire une fraise pourrait se dégager et sortir !

As you undoubtedly noticed, most of router chucks are conic, at least larger models. This shape has been designed to further squeeze the bit shanks to ensure maximum grip. However, if router bits are bottomed out, tightening causes slippage and the grip is less effective. The shanks can be damaged, or worst, the bit can loosen and slip out !

Pour prévenir les fraises de toucher le fond, j’ai pensé à cette nouvelle méthode, soit ajouter un petit morceau de mousse isolante de tuyau (ou nouille de piscine) dans le fond du mandrin des gros modèles ou dans le manchon lui-même des les petits modèles.

To prevent the bits from bottoming out, I came up with this new method, adding a small piece of pipe insulation foam (or pool noodle) at the bottom of the larger chuck models or in the sleeve itself of smaller models.

Router Bit Depth Stop Cushions / Coussins de profondeur pour fraises

Router Bit Depth Stop Cushions / Coussins de profondeur pour fraises

Ces mousses sont faciles à couper et j’ai toujours une réserve.

Vous pouvez également jeter un œil sur cet autre matériau que j’utilise depuis des années.

Such foam is easy to cut and I always keep some on hand.

You can also take a look at this other material that I’ve been using for years.

Router Bit Depth Stop Cushions / Coussins de profondeur pour fraises

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16 Responses to Router Bit Depth Stop Cushions / Coussins de profondeur pour fraises

  1. Michel Beaupré says:

    Bonne idée. J’aurais dû y penser moi-même.

  2. Kahuna Anderson says:

    An “O” ring serves very well for this application!

  3. bob817 says:

    Hey Serge, What size would you recommend cutting them at, 1/8 or 1/4″? I use the O-Rings also but I think your way is much more economical!

  4. Mark Butler says:

    I like this tip Serge. It will take me 5 minutes to find and cut the foam and it’s free. Much better than messing around with o rings.


    • Hi Mark,
      It’s free as long as you don’t have to drive a 60km round trip to get a foam strip !! 🙂

      Take care,

      • Mark Butler says:

        No driving required Serge. I’m like you in at least one way, I never throw out something that has the slightest possibility of being of use in the future. I have a variety of foam. I just need to find it. 🙂

        • If you need to find what you have, you are definitely like me ! 🙂


          • Mark Butler says:

            Well this turned out very odd today. My wife came home yesterday with a small basket shelf that she said would fit behind the bathroom door. It’s to hold all her jars of women stuff. The only problem was the door is hitting the frame. I said we need to wrap a bit of foam around the leg to protect the door. Went to my shop, found a piece of foam pipe wrap and got 2 jobs done within 10 minutes. Wrapped the leg of the shelf and cut up some small pieces for my routers. My memory is not to good now but the pipe wrap was still where I thought I left it about 3 years ago. I felt young for a few minutes after that 🙂


          • Mark, I agree, you must have felt good !
            By the way, I’d say you’re a Superman 1) having remembered you already had foam pipe wrap, 2) where you left it, and 3) and for how long you had it in your shop ! You are definitely younger than it appears. 🙂 🙂
            All good news !

  5. JB Masnelli says:

    Bravo pour cette idée, je vais l’appliquer de suite.