Rebound Springs.

[pantannojack]

In working with a 19-2 I got either new, orphaned with out a box, or a professional re blue, rebuild. It has a thumbnail size slight erosion blued over on the side plate. No other marks or clues, but a light single action let off, under three pounds. A member on this forum sent me a factory spring which I am grateful for and now it lifts 3 and some times 3 1/4 pounds. The replaced spring fell into some others I have had over the decades so I now have two springs with 16 coils and two with 17.

I have some old wolff labeled plastic bags with the springs in them marked " Rebound Spring 13, 14, 15 lb , Reduced Power. Smith & Wesson J,K,L,N Frame Revolvers no way to tell which belongs where. Lota wind/ no sail.

So, the 16 coils must be the lighters, and the 17 must be the heaviers.

Why this story? I have a 586 no dash lifts 4 1'4 pounds single action, I would like to go lighter on the 586, and another 1/4 heaver on the 19-2. Before going into the guts again of either the 19-2 or the 586 I wonder in replacing which I should expect to use. The less I disassemble this things, the better I like it. Lota wind/ No sail.

 

[SS336]

I wish I knew the answer too. Pretty sure someone here can help us out. Have a small parts drawer full of rebound springs that I don’t have a clue what they are.
Couple of years ago I found some small ziplock bags and keep any known ones in them marked, with what pound they are.
I try to be more organized now.

 

[armorer951]

I have no idea who it was/is that came up with this data about wire diameter etc.........I think I copied it from another thread several years back.

I believe the Wolff data is actually from the company.

Increasing rebound spring tension will usually result in an increase in the SA pull rate, lowering the spring rate will often lower the SA rate. This is not always the case, and depends largely on the use and integrity of each revolver's interface between the trigger and hammer.


S&W factory installed rebound slide springs:

Wire diameter, all: .036"

Coil diameter: .185" - ends closed/flat ground

OAL for K, L, N frame: approx. 1.175" coils: 17
OAL for J frame: approx 1.050" coils: 15


Wolff "aftermarket" rebound slide springs:

Coil diameter: .190" - ends closed, not ground

rated pounds / wire diameter / approx OAL / # coils
11 - .030" - 1.20" - 17
12 - .030" - 1.40" - 18
13 - .032" - 1.115" - 17
14 - .032" - 1.190" - 17
15 - .032" - 1.260" - 17
16 - .032" - 1.360" - 17


More threads about rebound springs.....

http://smith-wessonforum.com/s-w-sm...oss-frame-sizes.html?highlight=rebound+spring


http://smith-wessonforum.com/s-w-sm...ht-k-l-n-frames.html?highlight=rebound+spring

Carter

 

[series guy]

If you have plans to carry either gun then I would recommend installing factory springs and leaving it at that. For target work I set my guns up with 2 1/2# S/A and 8# D/A triggers. If you are changing springs in the 586 I would try a 14# rebound spring first. I would be remiss if I didn’t add that springs do not make an action job.

 

[Protocall_Design]

If you have a pile of springs and don't know the whichness of what, you can take the hammer and mainspring out of the gun and run just the trigger and rebound slide with "a" spring.

The spring by itself has one weight. The same spring installed in the gun has another weight because of the mechanical leverage from the trigger. For example, a factory spring is generally assumed to be an 18 lb. spring. When in the gun, pulling on the trigger with a trigger pull gage will show around 5 pounds. An 11 lb. Wolff spring in the gun will show around 3 pounds on the trigger pull gage. All the Wolff springs from 12 to 16 lb. will show a trigger pull between 3 and 5 lb.

So then you can weigh each one in turn and arrange them according to how much they are on the trigger pull gage and segregate them that way. Then you are measuring instead of guessing.

When you set up a revolver action, get the mainspring set to where it fires whatever primers you're using 100% of the time with a heavy rebound spring. Then put in the lightest rebound spring that rebounds the trigger the way you want it to. You can go heavier or lighter by using the now orderly set of springs. Any other brand of rebound springs can also be integrated into this set by the same method.

 

[Alk8944]

Buy a few new factory rebound springs from S&W then throw the unknown springs away since you apparently unable to test them. There are no after-market springs that are better than factory springs, just different, although they may be adequate in most cases.