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idodsick

riser question

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i have already ordered a new pair of vse risers but am wondering if these are still good. i purchased a rig with older style velcro toggles and the seller threw these in with the purchase. i only put about sixty jumps on these before i had a malfuntion that ruined my main. these sat while i was demoing gear so i never really noticed the problem until i went to attach my new main this weekend. is this a big problem and what could have caused this. it looks to me that the grommet was improperly seated. also the stitching that holds the hard housing to the riser webbing was coming loose. the latter didnt worry me all that much as this an easy fix for my rigger.

http://s63.photobucket.com/albums/h127/elysium2282/riser/?action=view¤t=100_2301.jpg
the diamond can not be polished without friction, nor a man perfected without trials.

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yeah the pictures were hard to keep in focus once i got really close. i think that you can tell that there is about 1/8 inch of frayed webbing sticking above the backside of the grommet. i am interested in what would cause the webbing to fray like that with so little use? has this been seen by other riggers? is it common with certain brands of risers?
the diamond can not be polished without friction, nor a man perfected without trials.

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I've see more than a few risers with this type of damage lately. A bit of fraying is OK, but it looks like you've got a lot more than I would be comfortable with. I would not use those risers.

The cause of the fraying is the grommet wasn't set as tightly as it should have been the risers were manufactured.

The stitching holding the hard housing is easily fixed, but not much point given the damage at the grommet.

_Am
__

You put the fun in "funnel" - craichead.

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i think i need to get my riggers ticket to understand how these are made. is the male side of the grommet beat threw the webbing and then crimped with the female end. this leads me to ask if this is the case isnt there a better way?
the diamond can not be polished without friction, nor a man perfected without trials.

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They punch a hole in the webbing, then insert the male end in and crimp it against the female end using a custom die.

As long as the punch went smoothly, and the grommet is well seated it works. If the punch-hole was frayed, that fray will work itself out over time - especially if the crimp is not as tight as it should be.

It's possible a rigger may be able to repair that riser by installing a new grommet. It'd be worth a shot as a lot of manufacturers are charging a fortune for risers. It may be that the damage is too extensive for a repair though, it's hard to see in the blurry photos.

_Am
__

You put the fun in "funnel" - craichead.

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Isn't this a SS spur grommet?

My understanding is that it takes a press to set a SS grommet.

If the webbing is working out of the grommet, I would also expect a problem with the spurs.

(Spur grommets have little teeth inside that are supposed to grab the edges of the material in which the grommet is set.)

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Quote

You can and I do set SS spur gromments with a hand set. It's just a much more expensive hand set than the ones for Brass or nickel plated brass spur gromments.

See Paragear for the two different hand sets.



I stand corrected. Thanks for pointing this out.

And yes, those are some expensive tools!

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A Senior Rigger rating will not teach you how to build 3-Ring risers, because that is Master Rigger turf. However, a you what a good 3-Ring riser looks like in terms of ring spacing, loop length, etc.
Mind you, information on how to inspect 3-Ring risers is also available on the UPT website, Australian Parachute Federation website, etc.

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... difficult to see in your photograph, but I get the impression that the rear riser is pulling out of the grommet. ... a common wear point.

The prevent this, better manufacturers hot cut grommet holes, then bar-tack across the top edge of the hole. ,This requires a specialized hot knife with a nifty tubular cutting edge.
They complete the job by tight-setting the grommet, which is an easy task with hand tools and a keen eye.
The best grommet-setting dies roll the rim to create a smooth edge that does not fray white loops.

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Yes there isa hand set for ss that puts a tight roll on the edge. A riser is about as thich as you can go the long shanks are just barely long enough and you have to use a heavy hammer to get enough compression to really roll it. Does any one know of a slightly longer grommet then he ss #0 from Loid and hodges?

Lee
Lee
lee@velocitysportswear.com
www.velocitysportswear.com

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It's from Stimpson. It's the one for SS not brass. You must have the brass one. The diffrence is in the top half, the hand part not the base, It's marked #0 SPUR SS. I think I got mine from Loid and Hodges but it might have come from Fassener Supply.

Lee
Lee
lee@velocitysportswear.com
www.velocitysportswear.com

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