Bullseye-L Forum
Would you like to react to this message? Create an account in a few clicks or log in to continue.

1911 Spring Tester

+4
RodJ
WillH
Ed Hall
Chase Turner
8 posters

Go down

1911 Spring Tester Empty 1911 Spring Tester

Post by Chase Turner 7/14/2021, 10:09 pm

Hello,

I've recently come across a box of 1911 springs, and of course, none are labeled as to poundage. I am in the market for spring tester, and can make one if anyone has plans.

Please share any plans or spring testers you have used. 

Thanks!
Chase

Chase Turner

Posts : 59
Join date : 2019-11-15

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by Ed Hall 7/15/2021, 6:53 am

Most basic:

Make a hole in the bottom of an empty food can that is deeper than the spring.  Make the hole slightly bigger than a Phillips screwdriver blade that is as long or slightly longer than the spring.
Insert the screwdriver through the spring and then into the inverted can and place it on a bathroom scale.
Compress the spring to its working length.
Read the scale.

Ed Hall

Posts : 841
Join date : 2012-09-10
Location : Adirondack Mountains

http://www.starreloaders.com/edhall/

Schaumannk, chopper, dieselguy624 and Slamfire like this post

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by WillH 7/15/2021, 12:48 pm

As far as commercial units go I have the one linked below.  Works good and comparison tests with known / labeled weights seem to agree.  It can also springs other than recoil.  There are probably multiple vendors for this. 

https://www.dillonprecision.com/secure-firearms-products-1911-recoil-spring-tester_8_30_25940.html

WillH

Posts : 90
Join date : 2017-04-27
Location : Chesapeake, VA

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by RodJ 7/16/2021, 5:47 pm

I googled spring rate calculator before and found it reasonably accurate. (I had a new, used pistol with an unknown recoil spring). https://www.thespringstore.com/spring-calculator.html

Accuracy was determined by measuring a couple known springs and running the parameters through the calculator. Trying it out with different wire material, I found that the difference between chrome silicon, music wire, and oil tempered wasn’t very big.

Wished I had thought of the bathroom scale. A lot quicker and more accurate.

RodJ

Posts : 70
Join date : 2021-06-26

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by jc2721 7/19/2021, 1:54 pm

Brownells used to sell a spring tester, when I wanted one they didn't have any so I made my own using hardware store parts--a long bolt, a few washers and an accurate fish scale (tested against 5 pound bags of rice).

I filed the threaded end of the bolt flat and drilled a hole in it for the hook on the fish scale and used a sharpie to mark the compressed lenth of the recoil spring (1.625", IIRC).

It worked out really well and I found that Wolff springs are accurately rated.  Now, if I could only find the darned thing I'd post pictures (lol), but it's pretty much intuitive (as far as putting one together).

Except for the scale, the parts cost less than $2.  Finding an 8" bolt was the only difficult part as most of the hardware stores around me only have the 6" bolts in stock.

jc2721

Posts : 7
Join date : 2019-06-22

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by Wobbley 7/19/2021, 2:15 pm

Rather than a bolt, use threaded rod, a washer and a nut to compress the spring on one end, a coupling nut and a threaded eye on the spring scale end. A piece of 3/4 inch plastic threaded pipe and cap to react the spring and close off the pipe on one end.  Drop spring over rod and washer, feed it thru the pipe and cap with hole, thread coupling nut and threaded eye and pull with spring scale.
Wobbley
Wobbley

Posts : 3308
Join date : 2015-02-12

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by bruce martindale 7/19/2021, 2:56 pm

1911 Spring Tester Img_0212

bruce martindale

Posts : 948
Join date : 2011-07-29
Location : Upstate NY

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by bruce martindale 7/19/2021, 2:57 pm

1911 Spring Tester Img_0213[url=https://servimg.com/view/19922031/44]1911 Spring Tester Img_0213[/url]

bruce martindale

Posts : 948
Join date : 2011-07-29
Location : Upstate NY

SteveT and ak41 like this post

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by Plunker 7/21/2021, 6:22 am

Bruce,

 How long is the piece of pipe ?  which appears to be 3/4 emt or cooper ?  It also appears the the board and PVC clearance  and stability.  Is that correct ?

 Appreciate you sharing

Plunker

Posts : 104
Join date : 2017-10-11
Location : N.C.

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by bruce martindale 7/21/2021, 8:13 am

Hi,
The collapsed spring length, (and hence 1/2" copper pipe) is 1.675"

Plastic base is 3.25" high, enought for that screwdriver to clear the scale platform. l put the flat spring end towards the scale with cut end inside pipe. Zero the scale weight with all parts on it or hard way, subtract parts weight later.

Compress so driver point is outside of spring and put the point into the hole. Wear glasses and be careful. Compress assembly until it bottoms out, then lift slightly to get a good reading. An additional base would add more stability but I haven't done that yet.
Good luck

bruce martindale

Posts : 948
Join date : 2011-07-29
Location : Upstate NY

Back to top Go down

1911 Spring Tester Empty Re: 1911 Spring Tester

Post by Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum