Death of a Trigger Pack: Timney Tavor Bites the Dust

beltfed said:
I wouldn't put anything from Timney in a service rifle....
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I have Timney triggers in 3 of my 4 AR's. Love them and won't change them. NEVER GIVEN ME A PROBLEM.

The Timney Tavor triggers I had made my Tavor full auto - three of them. I finally went to a Sabra after that. Just because you have one bad incident with a different trigger all together doesn't mean ALL the triggers they make are crap.
 
BattleRife said:
Claven2 has the mechanism nailed.
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I bow to your superior Photoshop skills :) Great job of visually depicting the fracture zones on the hammer - it really makes it easy for folks to understand.

I'm nott familiar with how this trigger works in the overall Tavor mechanism (having never owned one) and your alternating bending moment theory makes sense to me.
 
From the Tavor forum

ShootingSight said:
The ShootingSight Tav-D hammer is a modified design versus the IWI hammer, since they were starting with a molded trigger pack, where the molding process wants thin walls, while I was starting with a billet, and used a CNC mill to remove material. In other words, my life was easier by leaving more material in the pack. So I took advantage of this, and the two fat shelves on the rear sides of the TAV-D exactly serve as landing pads, limiting the backward travel of the hammer, if needed. THe hammer also has two little flat pads on it that exactly come tangent with the pack, to distribute the load. This contrasts with the IWI design that adds a round pin in the back of the trigger pack, along with corresponding hooks out at the end of the hammer. in order to limit the hammer's rearward travel.

A secondary benefit of my design is that it eliminates mass out at the very tip of the hammer, reducing polar moment, and speeding up the hammer swing time.

Bottom line, I have had zero reports of broken hammers from Canada.
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Claven2 said:
I bow to your superior Photoshop skills :) Great job of visually depicting the fracture zones on the hammer - it really makes it easy for folks to understand.

I'm nott familiar with how this trigger works in the overall Tavor mechanism (having never owned one) and your alternating bending moment theory makes sense to me.
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Thanks to Claven2 and Battlerifle for their fine explanation of this failure. I learned something new today.
 
Armourall said:
I have Timney triggers in 3 of my 4 AR's. Love them and won't change them. NEVER GIVEN ME A PROBLEM.

The Timney Tavor triggers I had made my Tavor full auto - three of them. I finally went to a Sabra after that. Just because you have one bad incident with a different trigger all together doesn't mean ALL the triggers they make are crap.
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Wow - three of them? Don't I feel awkward...
I stand by my comment.
Timney has an ok reputation with their aftermarket triggers going in bolt guns, but the higher firing schedule of a semi-auto, especially a service rifle, I'd recommend leaving the belly gunner's shiny kit out of the equation and stick to a brand that is up to the task. KAC & of course Giesselle come to mind.
 
Similar thing happened to one of our customers' trigger

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Not that I want to hijack the conversation but Geissele triggers for the Tavors have not yet exhibited this kind of issue in the same amount that Timney has had to this point with this specific "break". Before swapping the factory triggers in both my Tavor and my friend's Tavor, I did some extensive research on viable options and Timney was one of the first ones to be scratched off of the list. Booth my friend and I went with the Geissele Tavor trigger packs and we've respectively shot 2000 and 4000 +/- rounds in our Tavors. Geissele triggers have shown no issues whatsoever.

Grant it, I have had no time on Timney trigger...but that being said, Geissele has been faithful to our needs and those needs have been very demanding tactical training in many harsh conditions.

Food for thought !
 
From the pic it almost looks like the hammer was hollow in the area it broke with non rounded edges, a hollowed out area with 90degree corners is a stress fracture waiting to happen.
 
^^^Wasn't there a problem with an initial run of Super Sabras?

Starting to think it may just make the most sense to go with the factory trigger pack. If SEHTF I will probably take my Geissele out and plop the factory trigger pack back in.

"Don't mess with perfection"
 
Mine was returned last year because of ftf strikes during CQB. Cost me some stages. They have told me they are developing a 2nd Gen trigger group, and when it's ready, I will be getting one of the new units instead of my old one with new springs.
I said I was fine with that. Hopefully this issue will be addressed as well.
 
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