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Naxo Binding
Torque Plate Modification

Nothing shall leave our home without modification. To that end, the Naxo NX01 binding receives our attention.

by Lou Dawson       
All randonee bindings allow more boot movement than good quality alpine bindings. Some skiers find this to be a trivial issue -- others take it seriously. The "one-rig" breed of randonnee bindings, comprising the Fritschi Freeride and Naxo NX01 and Naxo NX21, are the bindings most often taken to task on this issue. Yet all bindings wobble and bob, with the Naxo NX01 having slightly more movement than the Freeride (the Naxo NX21 has virtually the same stability as the Freeride. If you like the Naxo's features, but want it to equal the lateral stability of the Freeride, here is a modification that makes makes the 04/05 model Naxo NX01 equal to the Freeride.

Naxo binding with Torque Plate installed for an approximately 6% increase in torque resistance. Click image to enlarge.
 

 

Torque Plate being inserted in rear of Naxo plate reails, notice rabbits milled on sides of plate, creating flanges that fit in rail slots. Click image to enlarge.

When we bench tested the deflection of both bindings, I noticed that both allowed quite a bit of movement at the toe and heel, but the Naxo NX01 plate appeared to torque more, presumably due to it being two small bars arranged side-by-side and easily twisted, probably due to their having an open slote on the inside, rather than being a closed tube. It seemed that manufacturing a plate that inserted between the bars could stiffen them significantly, so we did just that.

We started with 1" x 1/4" hardware store aluminum bar stock. Using a router with a cutting guide and straight cutter, we milled two shelves (known as "rabbits" in some trades) in the sides of the stock so it would slide tightly between the Naxo plate rails, with the milled side flanges fitting the existing slots on the inside of the binding rails. We then cut the milled stock to length so it would fit in the gap between the Naxo to and heel units, once the binding was adjusted for boot length. To insert the plate, we removed the binding plate end-cap and slide the heel unit of the rails -- an easy process that only took moments. The whole project took about three hours.

Detail of custom built Torque Plate. Click image to enlarge.

We measured the results using a side-by-side comparo and test rig, and found the plate beefed the Naxo to equal the torque resistance of the Fritschi Freeride.

Necessary? You judge. Fun with power tools? You bet.

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