Mainspring data thread

[JLB]

New HW80: 28 coils 3.1mm wire 21mm OD 240mm long.

John

[DoctorBoudreau]

I like this spring..a LOT, if Walther will push LGV spares into the UK I for see this spring being used in many project guns.

Specs are:

236mm long, 3.35mm wire, 20.8mm OD, 14.4mm ID, 3.96mm between coils, 33 coils.

If the rifle you are tuning is optimised this spring will deliver 11fpe in .177 with ease with just 34CC of swept volume and the shot cycle is supreme. Its a soft spring due to the 33 coils but packs a nice punch.

Titan should make a copy of this one

Re-reading this statement Tony... define 'optimised' here. I think you said it didn't work well in a TX. Just not enough room in that gun to pre-load it properly? What kind of rifle would it be good for? I ordered one of the 16J kits from Germany and I'm going to test the piston in my TX but would like to hang onto the spring if there is a good use-case for it. Maybe an HW95 at 12fpe? At 34CC would a .22 be best?

[DoctorBoudreau]

I currently have the QX4600 - in a gun with Mk1 stroke it's up near 11.7 ft lbs with no top hat and no spacers....just custom guide. So there really is no spacing option. It would be nice to be able to adjust pre-load some more...I can't go up with this one. The piston is lightened as well.

Here are some other Maccari springs that I can easily source here in the U.S. (some may not fit the TX factory guides though and will need custom ones):

QX4600 spring 32 coils x.120" wire - ID .560 set
http://www.airrifleheadquarters.com/...88/7905117.htm

R6 Ultra XLD spring 30 coils x .120" with .530 ID
http://www.airrifleheadquarters.com/...88/1979288.htm

E9870 Euro Universal spring 39 coils x .120" wire 480" ID - 13" OAL
http://www.airrifleheadquarters.com/...88/6825218.htm

E8700 mini spring .105 wire, 29 coils, ID .555" 10" OAL
http://www.airrifleheadquarters.com/...88/5730289.htm

Merlin XL spring - Square wire, figure it at .116" average, .509 inch ID., 37 coils and 12.2" plus unset.
http://www.airrifleheadquarters.com/...88/4452198.htm

E3200 spring 32 coils, .110 wire, ID .540 inch - Unset 12" OAL
http://www.airrifleheadquarters.com/...88/7908088.htm

Merlin Mini Mag spring 29 coils x .110 round wire x .545 ID
http://www.airrifleheadquarters.com/...88/9682441.htm

[TonyL]

Chaps,

To tie in with Airsporter 1st's thread on HW80 mainspring spec, I thought this'd be of relevance, again.....

[TonyL]

Only me!!!!!

Just thought I'd ping this thread back up, to tie in with that excellent current thread on different springs and springer tuning!!

Jim, could this go into the "Useful Info" section, yet?

Ciao,

Tone.

[Shed tuner]

As I've run out of springs for my mk2 stroke TXs, I'm going to buy a #1 and #9 titan to try, based on the info is this thread they should both be suitable. In fact I think the #1 should be perfect

Thanks again for posting...

[MattyBoy]

As I've run out of springs for my mk2 stroke TXs, I'm going to buy a #1 and #9 titan to try, based on the info is this thread they should both be suitable. In fact I think the #1 should be perfect

Thanks again for posting...

I stuck a number 1 Titan in my .177 Diana 52 and it made 17 ft lb. I had to cut 3 whole coils off it to get 11.4 ft lb

Bloomin stiff spring

I'll be interested to hear how it goes john and how many coils you end up lopping off

Matty

[bigtoe01]

Jon

what length spring and what coil count and wore thickness do you need?

[Shed tuner]

Jon

what length spring and what coil count and wore thickness do you need?

I want ~ 3.2mm wire, around 21 - 21.4 OD
Coils and length is the experimentation - I want a few more coils, and a little more length, to get an overall softish but not too soft and unstable spring. I need to measure lenght, but obviously if I go a bit long it's easy enough to trim. #1 looked a good spec.

[Shed tuner]

I stuck a number 1 Titan in my .177 Diana 52 and it made 17 ft lb. I had to cut 3 whole coils off it to get 11.4 ft lb

Bloomin stiff spring

I'll be interested to hear how it goes john and how many coils you end up lopping off

Matty

hmmm... chopping is easy, but I don't want it too stiff... it looked less stiff than the #9 (more coils, same len), and the #9 is meant for a mk2. Maybe I should try the #10 but it looks too thin wire and possibly a bit short

Is the #1 really stiff, or just too long ?

[airborn68]

Hi all

Just thought I would add this to the mix.

One of the guys I shoot against is running a titan No7 in his tx with good results.
I shot it & it felt very fast but a little harsh for my liking, all other internal details he seems reluctant to divulge.
Have any of you tried one before I waste my money.

Regards Jon

[airborn68]

I tried the 9 in my set up & it made power very easily, so much so I had to cut a few coils off.

With minimal top hat the spring has only 5mm preload which gives me 11.2-11.3 f/lb.( also gets a bit stiff to cock towards the end but not excessive )

The number 10 had 47mm preload to make 11.2f/lb

Jon

[NickG]

I use the No 9 and the Mk2 in my guns depending on stroke, the No 9 is good and makes power easily but is a bit stiff to cock, I would like something in between ideally

[airborn68]

Nick

I was a bit concerned that with so little preload that it would not keep the bounce in check, but it seems to shoot fine @ 25 yards, of to test it out to 55 this morning.

Jon.

[NickG]

Nick

I was a bit concerned that with so little preload that it would not keep the bounce in check, but it seems to shoot fine @ 25 yards, of to test it out to 55 this morning.

Jon.

Mine( TX200) has a very light piston, and that does not bounce with the No 9, I do have a bit more spring room than standard though.