Monday, December 11, 2017

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V2 XLQ rollerski recall

Categories: Announcements | Author: SuperUser Account | Posted: 9/11/2017 | Views: 599
Certain older shafts recalled
V2 rollerskis has announced a recall of certain older XLQ shafts that do not have a reinforcement. Most of these shafts were made in 2013 before V2 started putting in an FMC reinforcement. All shafts that have "FMC" labeled on the top of the ski or screened on the side are not affected by the recall. Any XLQ98, XLQ900 or CLQ9848 skis that are not marked "FMC" need to be returned to V2 for replacement. Stop using these recalled rollerskis immediately.

For fastest service, send your skis to V2 directly with your contact and return address information to the address below. If you have any questions about this recall or whether or not your skis are affected, please contact V2 (603.672.2600) or BNS (720.227.9400).
Jenex Inc.
V2 Roller Skis
172 South Street
Milford, NH  03055
603-672-2600

Here is V2's announcement:

SAFETY NOTICE

If your XLQ98, XLQ900 or XLQ9848 skis are not marked FMC stop using them and send us the skis and we will add the FMC reinforcement as quickly as possible. Some of the skis have FMC marked on the label on top of the ski, while others have FMC silk screened on the side of the ski.

For 28 years Jenex has been using aluminum shafts made by the most respected extrusion company in the United States. Except for shafts that fatigued and broke due to physical damage to the bottom of the shaft, or because the shafts were simply used too long, the aluminum shafts have been bulletproof. * The XLA aluminum shafts have the same outside dimensions as the XLQ and are made in United States. According to the specifications the material in the XLQ has very similar strength and fatigue properties to the XLA aluminum shafts. The reason for using the more exotic and expensive alloy for the XLQ is because a large number of scientific studies proved that the lightweight material absorbs vibration better than any other known alloy and is extensively used for vibration damping in advanced aircraft and in military equipment.


To make sure the XLQ had good fatigue resistance properties we made the top, bottom and sidewalls thicker on the XLQ than on the XLA aluminum shafts. We also ran more durability fatigue tests on the XLQ. Since some of the shafts that were extruded in 2013 have prematurely fatigued we suspect that some of the shafts have microscopic extrusion defects where fatigue cracks can propagate towards the highest stress area of the shaft. Shafts will develop fatigue failure where the stress is highest, which is at the bottom of the shaft near the center. We now laminate a very high strength composite fiber epoxy structure to the inside bottom wall of the shaft. The material we use has much greater fatigue resistance than metal alloys and has a tensile strength over 10X greater than aluminum. These shafts are marked FMC for Fiber Metal Composite.


* All known materials will break due to fatigue under cyclic loading. Very high stress can cause fatigue failure in only a few thousand cycles while lower stress might not cause failure until 10,000,000 cycles.


Sincerely,


Lennart Johnson



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