Lift Peg (Spring) Source?

[caffel]

This is an extension spring 9" long with the exact same diameter and wire size. Century item # C-333.
Once you cut off the loops on the end its a little short but just the same stiffness as the one specified.
C Affel, Mentor FRC 423.

[JR0405]

Andymark has apparently ordered some but they won't be in stock until 1/24/17

http://andymark.com/spring

[phurley67]

If you are in the Metro Detroit area (we are in Canton), we have a few extras if you want to PM me and then pick up a 36" spring which according to the very friendly people at Peterson Specialty Products is a really close approximation of the McMaster Carr item (they used a different metal, that does not take to bends as well, but should have the same spring rate? -- what do I know I am a programming mentor).

They gave them to us for free, so if you are interested I will pass the extras out at the same price, just PM me and we can arrange a pickup.

[The Doctor]

Originally Posted by cgmv123

Did you inform McMaster Carr that up to 3000+ FRC teams would all be attempting to acquire a very specific spring ASAP all on the same weekend?

Maybe they didn't?

[Billfred]

Originally Posted by JR0405

Andymark has apparently ordered some but they won't be in stock until 1/24/17

http://andymark.com/spring

Update: They're in stock on the website now.

(Full disclosure of the painfully obvious: I work at AndyMark.)

[Ari423]

Originally Posted by Billfred

Update: They're in stock on the website now.

(Full disclosure of the painfully obvious: I work at AndyMark.)

Just to be clear: these are the McMaster springs listed in the manual not an "identical" spring from another source, correct?

[JR0405]

Originally Posted by Ari423

Just to be clear: these are the McMaster springs listed in the manual not an "identical" spring from another source, correct?

Unless billfred or someone else from andymark can confirm otherwise the product description on their website says "This is a steel compression spring, similar to the one used in the 2017 game FIRST STEAMWORKS℠."

[Jeff Williams]

Is there someone who has one of these springs from McMaster-Carr who can measure and share how much the spring bends down when a gear is hung at the end with the barb? If we had that value, it might be easier to find an equivalent or simulate the behavior until we can get the real thing.

[Whatever]

Originally Posted by Jeff Williams

Is there someone who has one of these springs from McMaster-Carr who can measure and share how much the spring bends down when a gear is hung at the end with the barb? If we had that value, it might be easier to find an equivalent or simulate the behavior until we can get the real thing.

The short answer is zero.

[ollien]

Originally Posted by Whatever

The short answer is zero.

What's the long answer?

[Daws00]

Originally Posted by Whatever

The short answer is zero.

I've heard from a few other sources that the spring bends a lot when the gear is on it. Could you elaborate a little bit on this topic? Also was the gear placed in the center hole or on the other openings of gear?

[Whatever]

Originally Posted by Daws00

I've heard from a few other sources that the spring bends a lot when the gear is on it. Could you elaborate a little bit on this topic? Also was the gear placed in the center hole or on the other openings of gear?

Disclaimer - I didn't acquire the spring but I have been assured by a source I trust that it was absolutely the exact spring.

From what I tried, only the 5 spoke holes fit over the hook on the end of the spring. When I put one of those openings over the spring and left the gear at the very end - the spring really did not appear to bend. It may have ever so slightly bent but for all intents and purposes it was zero.

How it behaves after 70 matches of robots slamming gears onto it may be a different story.

[s-neff]

Teams in the East Bay / San Francisco area - I have the McMaster spring on order & can send pieces out when it arrives in ~2 weeks. Shoot me a PM.

Using a 6" long home depot substitute for now, modifying the field piece design to get an extra 3" on the elevator. We'll probably shatter the plywood in the next couple days and I'll have to come up with something new...

[Brian Peters]

Hi All

McMaster gets this spring from AJ Coil in Indiana 574-353-7174

They will take private orders minimum is $75

You will need the spring specs:

36" long, OD 0.875" wire diameter 0.135"

to get the same spring

15 springs is just over the minimum cost so I recommend that you get local teams together for a single order.

They said they were surprised that McMaster was ordering so many of these but were kind enough to slip my order in the mix.

"some time you just need to ask the right questions"

Good luck with your Airship

Brian 3140 Flagship

[chrisrin]

Another option (also in Indiana) is Myers Spring Company: 574.753.5105

Similar process to what is described above. My friend who owns the company told me there is already a planned run of this spring coming up soon due to demand.