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SBS as in poly(styrene-butadiene-styrene). I was a little worried about it leaving marks though, since this same rubber is used in tires and in the soles of shoes. But that is the same type of hardness I'm looking for. Something that doesn't noticeably deform when you press it with your...

Thanks for the suggestion. What about SBS, I've seen it used in applications where I'd think the same properties are desirable.

Hey guys, I work almost exclusively with steel and a little with plastics, but now a product of mine needs a rubber part. The part will be used outdoors so it needs to be UV resistant and weather resistant. It also will need to be colored so it needs good color fastness. It needs to be fairly...

Thanks for all the help. We've actually found a way for the design to work now without the damper being in the hot oil. We think we found a way to get it far enough away from the hot oil so we don't have to worry about temperature restrictions. Obviously this opens the door for lots of...

I'm pretty sure an affordable compressed gas application could end in disaster under the high temperatures this would encounter. Some of the first things I came across when researching some gas struts were firefighters getting impaled by pistons after gas struts from doors and rear hatches...

The part would preferably "self-return" to it's elongated position when no force was applied to it. Just some quick research has me thinking perhaps a spring-return damper could be the right part for this application?

Oh and it can't be pneumatic or anything that requires an outside power source other than a person lifting it and a force compressing it.

If anybody has any suggestions, here's a little more information. I basically just need something for an application that will slowly lower something a small distance, around 5-7 inches. The lower time should be at 2-3 seconds. The weight it will lower will be between 10-20lbs, and 4 of these...

Thanks guys, I knew it was probably not called an actuator. Man, I've found that the simple stuff is harder to find information about than the serious, expensive, heavy duty applications.

Can anybody help me out with the name of this thing? I'm just trying to experiment with something and I'm looking for the actuators (may not even be called that) that are used in rear hatches for SUVs and sometimes on screen doors on porches. The kind from the porch that just slowly hisses air...

Thanks, Yea I'm not really concerned about the horizontal G's experienced during acceleration while driving, those G's are forces to be dealt with by the mounting hardware, not so much the rack it self. The downward forces and vertical G's are the ones I'm concerned about. I know the design...

Thanks guys. I'm just trying to think worst case scenario here, without a wreck that is. Think an old SUV with worn out shocks driving off an 8" curb or a driver going over some old railroad tracks at 60 without seeing them. I know I've done some things in my 4runner before in daily driving...

Hey guys, As a quick background I'm designing a kayak rack for suv's. We're working to find the perfect material and to do so I need to know what all the rack will be put through. My question is what sort of G forces do trucks/suv's go through on a day to day basis? I don't mean the g's of...

Speaking of all these materials, I had a post recently about which books were good for real world engineering applications, not just theory like many school books are. In regard to these material questions, what's the best way to go about trying to check prices for materials? I recently...

Nylon 6 (15% glass) seems to have a tensile strength almost exactly the same as PC according to one source online. The specific material was EMS Grivory Grilon BG-15/2. From IDES, 15% glass Nylon 6 is significantly cheaper than PC, if it has the same strength capabilities this could really...

Thanks again pat. Yea my boss and I shot down ABS early on in the design process due to its poor UV resistance. I mentioned Acetal copolymer and homopolymer because I saw that there are UV-resistant grades of it that are acceptable for outdoor use. ASA also lists several outdoor and...

Is Nylon 6/6 a comparable material? I see that it's cheaper than Nylon 6 and has the same glass mixture materials. I will check the properties myself but just wondering if you had any experience with the two materials. We're actually using nylon as part of a hitch adapter on a bike rack, but...

Hey thanks pat, I actually was just looking over some properties of the glass filled varieties of Nylon 6. According to IDES, it looks like Nylon 6 with 25% glass is the most expensive Nylon 6. Nylon 6 with 15% glass is substantially cheaper, are its UV resistance properties a significant...

Yea I've gotten the exact material that a competitor uses. "polycarbonate plus poly(styrene acrylonitrile butadiene)" Problem is, PC is too expensive of a material. Others that I've found that may work (need to be UV resistant or have a UV treatment) are Acetal Homopolymer or Copolymer, ASA...

I'm working on a few new products that will be used as automotive accessories, think canoe racks and things of that sort. The designs we have are good, but the material suggested by our factory is entirely too expensive. They've suggested PC (didn't specify yet what specific type). We need a...