Trying To Replace-D...
 

Trying To Replace-Duplicate An RWS/Diana Trigger Spring from An Old T01 Unit  

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ekmeister
(@ekmeister)
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Joined: 2 years ago
Posts: 448
2019-09-09 17:31:59  

Hi Guys, 

I used to have a treasure trove of replacement parts for several models of air guns, including spare parts for RWS triggers, but those parts got lost in transit about 4 years ago when I moved to Austin, TX.  Now, my assortment is much-smaller.  It's not a big deal when a part is still available, but a situation I have right now is more-complicated, because...

1. I found a schematic for the RWS T01 trigger in-question, and know the part ID # ( # 50 ) on the factory schematic, but Umarex USA said the trigger is so old they don't stock the parts anymore, and there's no hope of getting them again,

2. The original trigger spring in the rifle I'm working on here was replaced with something else that is way-too-light as a replacement, so using that one to measure for its specifications won't work, either.  Said another way, I don't want a duplicate of what's in there right now, I want a duplicate of the original so it works correctly, and I don't have one to measure for the specs.  (I know how to lighten this unit, even with a factory trigger spring, but what I have can't be set any heavier than 1.0 lb, and that's just too-light for a 'general-purpose-field' gun.

The spring in question is the shortest of the 3 in the unit, but I can do better than that.  If you look at this video, you can very-clearly see the OEM spring--the one I want to duplicate--shown from 3:15 to 3:25 :

So, finally getting to the point, does anyone have one of those springs to measure?  I'd like to have the wire size, either the ID or OD, and the number of coils.  I can tell from the video that the coil count appears to be 'something close to 9 coils', but I'd like to do better than that if possible.

If I can't find the exact specs, I can buy a few different springs that would appear to be a close guess, and I feel sure that one or more of them will work just fine.  But, I'd rather not use 'the shotgun purchasing method' if possible--it's sloppy and just makes for a lot of unnecessary waste.

Any assistance would be appreciated, thanks!!  And, I'll go to my plan B if necessary.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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marflow
(@marflow)
Joined: 2 years ago
Posts: 631
2019-09-09 18:43:36  

which rifle did it come out of, i do have a TO1 trigger group out of a 48-52 in a box somewhere i could check 

15+mm length

6.34mm OD

.37mm wire

7 coils 

Mike


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ekmeister
(@ekmeister)
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2019-09-09 20:42:16  
Posted by: @marflow

which rifle did it come out of, i do have a TO1 trigger group out of a 48-52 in a box somewhere i could check 

15+mm length

6.34mm OD

.37mm wire

7 coils 

Thank you.  But, would you please double-check which spring you're measuring?  I think you're measuring the wrong spring.  Those specs exactly match the ones for the longer, trigger-blade-return spring.  I already have one of those in this trigger unit, but it wouldn't work for the one I need.

The spring I'm looking to replace is more like 4.65 mm OD (.180"), and with wire size more like .78 mm (~ .30") if memory serves me correctly.  It is a sear-return spring, not a trigger-return spring.

As mentioned, there are 3 compression springs in that trigger unit, and the one I'm looking for is the shortest.  It sounds like you may be giving me the specs for the one in the middle.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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marflow
(@marflow)
Joined: 2 years ago
Posts: 631
2019-09-09 21:34:38  

yes that is the spring under the trigger 

i see that spring i'll have to disassemble the trigger group to do that, i'll see what i can do never had one apart 

Mike


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marflow
(@marflow)
Joined: 2 years ago
Posts: 631
2019-09-09 21:54:11  

12.7mm length

4.25mm OD

.53mm  wire

7.5 to 8 coils

part number 50 not part 51 trigger spring

these might work 

https://www.ebay.com/itm/10-Pcs-Small-Compression-Springs-15-mm-5-8-in-Long-x-4-5-mm-11-64-in-OD/332999881067?hash=item4d8856f16b:g:nGUAAOSwJ~xcMjam

 

 

Mike


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ekmeister
(@ekmeister)
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2019-09-10 07:04:54  

@marflow

It was nice of you to go to that trouble.  I thought you meant you had the trigger in pieces.  Thanks!

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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marflow
(@marflow)
Joined: 2 years ago
Posts: 631
2019-09-10 14:57:04  

well i'll get it back together or maybe it will be in pieces after i take it apart farther to get that spring in place 

happy to help the old broken 48-52 has been good for question on measurements through the years 

Mike


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Hector J Medina G
(@hector-j-medina-g)
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2019-09-11 16:47:41  

EkMeister.- You might try this one:

https://gardnerspring.com/product/precision-compression-36016g/  

HTH

 

 

 

 

 

HM


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ekmeister
(@ekmeister)
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2019-09-11 19:23:46  
Posted by: @hector-j-medina-g

EkMeister.- You might try this one:

https://gardnerspring.com/product/precision-compression-36016g/  

HTH

HM

Hector, I bet that one's perfect. I've got something coming from McMaster-Carr that is almost the exact same specifications, exact same OD, and with just a tiny bit larger wire.

They do have a few more coils to them,  so I have to cut them to length  and see how I like them.  Next time, I'll probably order these that you gave me the link to. I'm guessing you've used this one before. It looks like an exact match. And yes that helped, so thanks a lot.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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Hector J Medina G
(@hector-j-medina-g)
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2019-09-11 22:32:33  

@ekmeister

I've used Gardner springs to replace quite a few OEM springs.

And they made a special run to replace the T-06 trigger blade return spring that makes the T-06 a true competition trigger. Ask DT.

Great people to deal with, very knowledgeable, and not expensive.

Highly recommend them.

Even if you have already bought something, the few dollars invested in a baggie of 5 springs is a worthwhile pursuit to establish a business relationship with them.

Keep well and shoot straight!

 

 

 

 

HM


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ekmeister
(@ekmeister)
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2019-09-11 22:41:34  
Posted by: @hector-j-medina-g

@ekmeister

I've used Gardner springs to replace quite a few OEM springs.

And they made a special run to replace the T-06 trigger blade return spring that makes the T-06 a true competition trigger. Ask DT.

Great people to deal with, very knowledgeable, and not expensive.

Highly recommend them.

Even if you have already bought something, the few dollars invested in a baggie of 5 springs is a worthwhile pursuit to establish a business relationship with them.

Keep well and shoot straight!

 

HM

Do you know if they have a minimum purchase amount, and if so, how much it is? 

Finding the spring wasn't as hard as finding someone who didn't want me to spend $50+ in one purchase, and that's a lot when all you need is one spring.  I mean, I don't mind having to buy $15 worth at a time or so, but spending a lot more than that is inconvenient and it gets kind of expensive.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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Hector J Medina G
(@hector-j-medina-g)
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2019-09-12 07:03:02  

@ekmeister

When testing an idea, I've bought as little as 5 springs.

I try to buy other things to spread the shipping, but as far as MOQ, I know they sell as little as 5 units.

If in doubt, call them, they are really helpful.

Good luck and keep us posted.

 

 

HM


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ekmeister
(@ekmeister)
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2019-09-12 09:03:37  
Posted by: @hector-j-medina-g

@ekmeister

When testing an idea, I've bought as little as 5 springs.

I try to buy other things to spread the shipping, but as far as MOQ, I know they sell as little as 5 units.

If in doubt, call them, they are really helpful.

Good luck and keep us posted.

 

HM

Hector,

When testing a new trigger spring, for instance, (or O-rings, etc) I usually buy at least a couple of the ones I think I need, plus a couple more 'near' it in specs in case I'm wrong.  But, with some of these little springs having a price of like $2, a $50 minimum makes that 50 springs.  I like your 5 spring approach a lot better.

I'll call them if I can't make the McM springs work--maybe if I can, because the one you linked for me looks like I wouldn't have to cut any coils and close.

Thanks.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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Hector J Medina G
(@hector-j-medina-g)
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Posts: 286
2019-09-12 10:04:46  

@ekmeister

Yes, EK, for  ME time is of the essence and, while I can cut, forge, close and square a spring, if there is a direct drop-in replacement, I'll go for it.
The other thing is that McM-C has lately proven that buying 1 from them to test, or 5 from other sources comes at about the same total cost.
Yes they are fast, yes they are good, but lately, they have been raising their prices.

JMHO

 

 

 

 

HM


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ekmeister
(@ekmeister)
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2019-09-12 11:18:01  

@hector-j-medina-g

I called them.  For the record, their minimum purchase amount is $50.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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Hector J Medina G
(@hector-j-medina-g)
Member of Trade
Joined: 2 years ago
Posts: 286
2019-09-12 14:09:35  

@ekmeister

Sorry, EK, this must be something relatively new.

My last purchase from them, at the beginning of the year was for less than that.

I did pay shipping separately, and about 80% of the invoice was shipping. 

Anyway, apologies.

 

 

 

 

 

 

HM


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ekmeister
(@ekmeister)
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2019-09-12 16:49:58  

@hector-j-medina-g

You don't have anything to apologize for. Now I know where I can buy that exact spring, and another one I found there that I needed for an entirely different gun. I didn't know where to look for that one either. But I found it there.. They seem to have a really great assortment that fits into this little cubby hole where the air gun trigger springs go. This will all work out to the good eventually, so thanks for letting me know about the resource.

Oh yeah, you may get a kick out of this. I got my two little bags of springs today from McMaster-Carr. One of them is a bag of five that says Gardner Spring on the packet. They use them for sourcing these hard to find springs too, LOL.

Safe and Happy Shooting!

Ed, the Airgun TuneMeister

https://www.airguntunemeister.com/


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Hector J Medina G
(@hector-j-medina-g)
Member of Trade
Joined: 2 years ago
Posts: 286
2019-09-13 13:24:01  

@ekmeister

Ha ha ha!

Yes, that IS funny.

😉

Keep well and shoot straight!

 

 

 

HM


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