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CZ PISTOL CLUBS => CZ SP-01 and variants => Topic started by: ktk120 on February 25, 2020, 09:23:51 PM

Title: TSO which spring is which?
Post by: ktk120 on February 25, 2020, 09:23:51 PM

Just got a used but looks like new TSO 9mm.  Thats great that it comes with all the springs but how do I identify the # on the other springs.  I know the 16# recoil is in it.

What hammer spring is in it and what are the others that came with it?  What combination hammer spring is recommended with the 11# recoil spring?

Title: Re: TSO which spring is which?
Post by: tdogg on February 26, 2020, 12:35:43 AM

This is a quote from a response I recieved from czusa a while back:

"The TS Orange has a main spring of 20 lbs. and recoil spring of 16 lbs. installed. The TS comes with two extra main springs and recoil springs. The recoil springs are a 11 lbs. (short spring) and a 13 lbs. (long spring). Main springs are 13 lbs. (short spring) and a 16 lbs. (long spring)."

Cheers,
Toby

Title: Re: TSO which spring is which?
Post by: George16 on February 26, 2020, 09:18:46 AM

I’m using the stock hammer spring (20#) with an 11# recoil spring for my 130pf reloads.

Title: Re: TSO which spring is which?
Post by: LeeM on February 27, 2020, 08:54:56 AM

You can measure the spring rate of your existing springs as well if the springs aren't color coded. Force in pounds/distance in inches = spring rate.

Title: Re: TSO which spring is which?
Post by: Gducoing on February 28, 2020, 01:18:43 AM

Quote from: LeeM on February 27, 2020, 08:54:56 AM

You can measure the spring rate of your existing springs as well if the springs aren't color coded. Force in pounds/distance in inches = spring rate.

How are you measuring the force in pounds? What are you using?

Sent from my SM-N950U using Tapatalk

Title: Re: TSO which spring is which?
Post by: LeeM on February 28, 2020, 08:47:41 AM

Quote from: Gducoing on February 28, 2020, 01:18:43 AM

Quote from: LeeM on February 27, 2020, 08:54:56 AM

You can measure the spring rate of your existing springs as well if the springs aren't color coded. Force in pounds/distance in inches = spring rate.

How are you measuring the force in pounds? What are you using?

Sent from my SM-N950U using Tapatalk

The simplest rig is a weight, preferably greater than the expected spring rate (for accuracy), and two closed loops of a braided aramid (low stretch) fishing line with a bead on each. Find the total applied force by adding the weight and 1 loop weight on a precision scale = force. Thread the loops in opposite directions thru the spring so the beads push on the ends of the spring, hang the weight from the assembly and measure resulting spring length. The difference in unloaded and loaded length is divided into the force (weight). The weight should be enough to get the greatest measurable length change without fully compressing any coils for greatest accuracy. So maybe 20# dumbbell on a 16# recoil spring. You could test in tension, but the risk of deforming a spring is greater than in compression.