I beg to differ.
Think about it this way. If you have a piece of spring steel 20 feet long
and extend it between two fixed points and then apply a weight to the
center, it will droop a given amount. The cut off a portion of it and move
the end points closer together and reapply the same weight. It will sag
less. Wind that steel into a coil and you get the same effect.
The spring rate of the steel did not change (unless you heat it changing the
properties) but the total amount of travel will become less, making the
spring stiffer.
The same thing happens with leaf springs.
Joe C.
-----Original Message-----
From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
Behalf Of Bill Babcock
Sent: Thursday, March 25, 2010 9:00 AM
To: Kramer, Robert
Cc: 'Friends'
Subject: Re: [Fot] WG: Paging Tom Krieger re: rear springs
spring rate doesn't change when you shorten a spring unless it's
progressively
wound.
On Mar 25, 2010, at 5:35 AM, Kramer, Robert wrote:
> Is there a formula to determine spring rates when you shorten a spring?
The
> Afco 2 5/8" springs that Greg Blake has pointed out come in 8, 10, 12 and
14
> inch free lengths. I want a 9" free length spring to keep my ride height.
If
I
> buy a 700 lb 10" spring and cut off an inch I would guess at a rate
somewhere
> around 800 lb rate.
>
> Bob Kramer
> Sales Manager
> RDO Equipment Company
> 16415 N. IH 35
> Pflugerville, TX 78660
> 512-272-4141
>
> -----Original Message-----
> From: fot-bounces@autox.team.net [mailto:fot-bounces@autox.team.net] On
Behalf
> Of MadMarx
> Sent: Thursday, March 25, 2010 9:46 AM
> To: 'Friends'
> Subject: [Fot] WG: Paging Tom Krieger re: rear springs
>
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