Upper shock frame sliders length
Tourer
Joined: Jan 2019
Posts: 342
Likes: 146
From: Chicago
I haven't seen a catastrophic "flip" you guys keep mentioning.
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Road Captain
Joined: Nov 2017
Posts: 711
Likes: 143
From: .
In the video that Eborjas showed, reckon its of Rob Carpenter the Harley stunter(?), it clearly shows that the crash bar sliding over the concrete joint without any sign of flipping. Its not a small gap either. Just sayin. I guess if you slide over a pot hole or hitting softer ground like grass and gravel, the bike would flip anyways with or without sliders sticking out... or a engine case for that matter. Im not sayin that sliders are immune against flipping...
Extreme HDF Member
Joined: Jun 2014
Posts: 11,448
Likes: 2,299
From: NW Ohio
If you have a lathe to male these, I assume you also a chainfall or hoist of some type. Strap up the top of the bike to the hoist and start laying it down until you get danger close. Then measure.
As far as the "flip"...who knows...but I can personally confirm a lowside can become a catastrophic highside as soon as you leave the pavement...without sliders.
As far as the "flip"...who knows...but I can personally confirm a lowside can become a catastrophic highside as soon as you leave the pavement...without sliders.
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Road Captain
Joined: Nov 2017
Posts: 711
Likes: 143
From: .
Its just a small metal workshop I have access to, not a big fancy with that kind of lifts :P I think I will just start with 6" from the original bolt and go from there, laying it down and measure and stop when the gap between the exhaust and the ground is noice!
Tourer
Joined: Jan 2019
Posts: 342
Likes: 146
From: Chicago
Maybe you can make me some small ones.
Road Warrior
Joined: Jun 2017
Posts: 1,705
Likes: 1,017
From: Lawrenceville Ga.
Thanks, but I already know this. Im also running the bungking crash bar. Looks? Haha, it looks much better without these sliders of course. Im doing it for the protection. The picture is just a reference for measure taken from bungking, I just added the red.
Like you said, maybe I should make it shortest possible, just long enough to protect my exhaust. Delrin by nature is very resistant to shattering under high impact and has a slippery quality, making it slip across the pavement as opposed to digging in and causing the bike to flip.
Like you said, maybe I should make it shortest possible, just long enough to protect my exhaust. Delrin by nature is very resistant to shattering under high impact and has a slippery quality, making it slip across the pavement as opposed to digging in and causing the bike to flip.
Wear-Resistant Easy-to-Machine DelrinŽ Acetal Resin Tubes
- Color: White or Black
- Temperature Range:
6" Lengths: 0° to 180° F
All other sizes: -20° to 180° F - Tensile Strength: 7,690 psi (Good)
- Impact Strength: 1-1.5 ft.-lbs./in. (Poor)
- Hardness: Rockwell R120-R122 (Hard)
- For Use Outdoors: No
- Specifications Met: See table
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Road Captain
Joined: Nov 2017
Posts: 711
Likes: 143
From: .
Actually poor impact. I machine hundreds of pounds of acetal resin every year. I would reinforce internally with aluminum.
Wear-Resistant Easy-to-Machine DelrinŽ Acetal Resin Tubes
- Color: White or Black
- Temperature Range:
6" Lengths: 0° to 180° F
All other sizes: -20° to 180° F - Tensile Strength: 7,690 psi (Good)
- Impact Strength: 1-1.5 ft.-lbs./in. (Poor)
- Hardness: Rockwell R120-R122 (Hard)
- For Use Outdoors: No
- Specifications Met: See table
Last edited by Bob_fxdb; Mar 6, 2019 at 01:53 PM.
Road Warrior
Joined: Jun 2017
Posts: 1,705
Likes: 1,017
From: Lawrenceville Ga.
Im not saying that you are wrong or right, but delrin has been used for motorcycle sliders quit a while now and the material is proven to work for this purpose. So the impact strength is poor, but still it wont shatter to million pieces but keep its shape more or less and slide. The description from my post about delrin its not saying anything about impact strength either...
Yes it's a great material but so is UHMW. If I were to use acetyl resin I would reinforce internally especially at attachment points.
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Road Warrior
Joined: Jun 2017
Posts: 1,705
Likes: 1,017
From: Lawrenceville Ga.
What is your purpose for these? Looks or actual protection? If those are for protection then they are way too long. Once those things touch the ground they will snap right off if you're lucky. If your unlucky they will hook up on something and get your bike spin and/ or tumbling. Generally the shortest you can make them where they will do their intended job of protecting the frame.
Ditto (If those are for protection then they are way too long)
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Road Captain
Joined: Nov 2017
Posts: 711
Likes: 143
From: .
Yeye, the picture is just for reference as mentioned further up. The length is discussed already and I dont see the point on commenting on that again.
You wrote that the tensile strength is good, so I reckon the chance for the delrin to bend is very possible instead of snapping off? I would say the impact in the first video posted is HARD, if the delrin didnt break off there then I think thats a good result. Imagine how big of a accident it has to be to break a delrin... I think the bike would be totaled regardless anyways...
I have a pair of delrin sliders in my hands, thats why im using it. Its nothing more then that, and I also know this is a proven material for the purpose im using it on... as mentioned.
You wrote that the tensile strength is good, so I reckon the chance for the delrin to bend is very possible instead of snapping off? I would say the impact in the first video posted is HARD, if the delrin didnt break off there then I think thats a good result. Imagine how big of a accident it has to be to break a delrin... I think the bike would be totaled regardless anyways...
I have a pair of delrin sliders in my hands, thats why im using it. Its nothing more then that, and I also know this is a proven material for the purpose im using it on... as mentioned.
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