160 pound spring for a 1/2 inch gap?

[John Doe]

I want to put a spring under the heel of my inline skate. But there is only a 1/2 inch clearance, and it needs to be a heavy-duty spring. Should I consider using a spring steel flat bar or similar, instead?

Thanks.

[Lloyd E. Sponenburgh]

John Doe fired this volley in news:4f67b801$0$860 $c3e8da3$ [e-mail]:

Belville washers. You can stack them to any height you wish, and get them in anything from mere foil to structural thicknesses.

LLoyd

[Tom Gardner]

I want to put a spring under the heel of my inline skate. But there is only a 1/2 inch clearance, and it needs to be a heavy-duty spring. Should I consider using a spring steel flat bar or similar, instead?

Thanks. ________________________________________________________ Maybe a piece of rubber or urethane.

[Ecnerwal]

Look into Belleville disc springs (aka washer springs)

McMaster (among many other places) sells them, and has a brief introduction to them if this link is any good (or go search their site if it's bad - sometimes they don't like to paste right)

McMaster is often fast, often has stuff, but is not always cheapest if you are trying to squeeze the last penny out. They are not infrequently cheap enough if you hunting for the absolute best deal involves spending time that's worth anything on the search.

For instance 9712K69 - Qty. 12 3/8 ID 3/4 OD 166 lb working load each with a height of 0.055 inches for $4.12 - you can fit 9 in 1/2" as an inverted stack, giving a deflection at working load of 0.099 inches for the stack. I'm assuming you have 3/4 inch width available, and are trying to fit 1/2" height. Other options are available if that's not the case.

[Steve W.]

How much travel do you need from the spring? If your just looking for shock absorption I would use some elastomer compound. You can get it with a lot of different compression rates and then you just mold it in place. Sort of like Shoe goo or silicone based RTV

[The Daring Dufas]

You could devise a lever operated suspension utilizing a torsion bar for a spring. That way, you could adjust it and create the whole new industry manufacturing skate suspensions. ^_^

TDD

[Cydrome Leader]

Would something like rubber work? Bellville washers are great for compression but offer no stability otherwise.

[Lloyd E. Sponenburgh]

Cydrome Leader fired this volley in news:jk8md0 $1e9$ [e-mail]:

What does that mean? They work like any other spring, though constrained differently.

I use them all the time as mold cushions on pressing equipment.

LLoyd

[John Doe]

Is it the subject matter, Marbury? You recently replied to an off-topic post crossposted to, of all places (24hoursupport.helpdesk).

alt.home.repair,uk.d-i-y,uk.rec.cars.maintenance,rec.woodworking,24hoursupport.helpdesk

Subject "Bending 3mm metal puzzle"

Your reply about an aluminum kitchen saucepan had nothing to do with woodworking, car maintenance, or the chock-full-of-trolls helpdesk group.

[John Doe]

I think he is talking about how the suspended wheel functions, like how it is held upright. I need to carefully consider that, if I do it.

Thanks to the pinpoint replies.

[John Doe]

You mean like stacking them in alternating directions, one facing up and then the next facing down and so on.

What is "deflection" in this context. Is it the amount that the stack moves to the side? Is it compression? A compression of 1/10 inch?

Also, what is the meaning of "low cycle" in this expression "low-cycle die press applications such as trimming and stamping". I would guess that means "few cycles" or "slow cycles" but I don't know what machine they're talking about.

Thanks.

[PLONK]

*** P L O N K ***

[John Doe]

According to McMaster, it is the percentage of spring compression at maximum load.