T-rex slider manufacturing error!!

ShinyPartsUp said:

But was the void a contributor to the damage sustained? Did the slider fail or fall off?

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fjrshanta said:

ShinyPartsUp said:

But was the void a contributor to the damage sustained? Did the slider fail or fall off?

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I examined the slider and found the end of it hit the ground and several strong impact points were in it. This would lead me to believe that it absorbed some energy before being broken off. It definitely dint fall off.

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ShinyPartsUp said:

fjrshanta said:

ShinyPartsUp said:

But was the void a contributor to the damage sustained? Did the slider fail or fall off?

Click to expand...

I examined the slider and found the end of it hit the ground and several strong impact points were in it. This would lead me to believe that it absorbed some energy before being broken off. It definitely dint fall off.

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I don't mean to be dense (sometimes I just am), but did the slider break off along a void? My point would be: If they did not fail at a void, it could mean they had no structural failure based on manufacture defect (the void). Not knowing details of the crash, and not being an engineer, I can't guess if the forces were hugely over a reasonable design structure for a slider. Do you think the slider should not have failed?

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fjrshanta said:

ShinyPartsUp said:

fjrshanta said:

ShinyPartsUp said:

But was the void a contributor to the damage sustained? Did the slider fail or fall off?

Click to expand...

I examined the slider and found the end of it hit the ground and several strong impact points were in it. This would lead me to believe that it absorbed some energy before being broken off. It definitely dint fall off.

Click to expand...

I don't mean to be dense (sometimes I just am), but did the slider break off along a void? My point would be: If they did not fail at a void, it could mean they had no structural failure based on manufacture defect (the void). Not knowing details of the crash, and not being an engineer, I can't guess if the forces were hugely over a reasonable design structure for a slider. Do you think the slider should not have failed?

Click to expand...

It DID fail at the void.

As I posted on "Gravel Devil ate my 07" I had noticed a fracture in the Delrin material just before the crash and was planning on replacing it. The fracture point was concurrent with the break location during the crash and was the weak point in which it propagated from.

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ShinyPartsUp said:

fjrshanta said:

ShinyPartsUp said:

fjrshanta said:

ShinyPartsUp said:

But was the void a contributor to the damage sustained? Did the slider fail or fall off?

Click to expand...

I examined the slider and found the end of it hit the ground and several strong impact points were in it. This would lead me to believe that it absorbed some energy before being broken off. It definitely dint fall off.

Click to expand...

I don't mean to be dense (sometimes I just am), but did the slider break off along a void? My point would be: If they did not fail at a void, it could mean they had no structural failure based on manufacture defect (the void). Not knowing details of the crash, and not being an engineer, I can't guess if the forces were hugely over a reasonable design structure for a slider. Do you think the slider should not have failed?

Click to expand...

It DID fail at the void.

As I posted on "Gravel Devil ate my 07" I had noticed a fracture in the Delrin material just before the crash and was planning on replacing it. The fracture point was concurrent with the break location during the crash and was the weak point in which it propagated from.

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Sorry, didn't read the thread. Glad you're ok. I went with R&G Racing sliders for this very reason -- I assumed there would be better quality control for a more expensive slider meant for racing applications.

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Fencer said:

This is a set that T-rex replaced when they formed cracks for no reason.

No drop or impact (to my knowledge, but the bike was in the shop) the end was not deformed like it had a drop or inpact, the slider just split (at both ends)

BUT, if you notice in my pic, the crack does not make it to the void. The black circled area shows the crack stop point.

The red area is hollow to the outside point (inside) of the casting. this should have been seen by the MFG. It was covered with the metal spacer insert.

FJRshanta,

When did you purchase yours? I gote mine late Feb/March 08.

Maybe they had a bad production run??

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fjrshanta said:

I wonder if T-rex would be interested in our findings? :good:

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Fencer said:

fjrshanta said:

I wonder if T-rex would be interested in our findings? :good:

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I don't know if they are interested or not, but they have been alerted

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fjrshanta said:

Fencer said:

fjrshanta said:

I wonder if T-rex would be interested in our findings? :good:

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I don't know if they are interested or not, but they have been alerted

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COOL! :yahoo:

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Geezer said:

Well, they do look like pretty cheaply made sliders. I would not use sliders that don't have a metal sleeve inside the section that the bolt torques up against, between the bolt head and the end of the slider that goes against the FJRs frame. Without that sleeve you are compressing the delrin when you tighten the bolt and that may be contributing to the failures in the pictures.

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Geezer said:

Well, they do look like pretty cheaply made sliders. I would not use sliders that don't have a metal sleeve inside the section that the bolt torques up against, between the bolt head and the end of the slider that goes against the FJRs frame. Without that sleeve you are compressing the delrin when you tighten the bolt and that may be contributing to the failures in the pictures.

Click to expand...