Re: ZR2 trem buzz/rattle/resonance/vibration issue solved?
I have a S5470K KOA 60 which is fitted with the ZR2 trem.. It too rattles and buzzes at certain frequencies..
This will be practically impossible to fix as the rattling is certainly coming from the ball bearings within the pivot system..
As the pressure of the strings pulls the trem forward, pressure is put on the ball bearings within the ball race, at the front.. Pressure is therefore released from the ball bearings at the back, and they are left to vibrate freely..
I have experience of this potential problem due to the similar use of ball races in turntable pick-up arms, for vinyl records.. They too can potentially vibrate due to the vibrations caused by the stylus in the moving record groove..
The way around this is to use pre-stressed ball races, and Ibanez should either have done this, or have used a fixing method for the races involving a threaded adjuster at the centre of the races, used to put pressure on the ball bearings and eliminate free play..
However, they didn't, ( not on the model I have, anyway ) and I am considering removing the ZR2 and replacing it with the edge zero, which appears to have the same fixing dimensions..
This will fix the rattling and the guitar should certainly sound better too..
If I do this, I will re-post with the results..
Also, because of the use of ball bearings, the vibrations have multiple paths to choose from, which is never a good thing when dealing with resonance. The 2 point knife edge fixing is to be preferred when high pressure is involved..
Although I have been able to find one, the edge zero is now discontinued, so the edge zero 2 would be the alternative, although it has an inferior trem arm system, and no fine adjuster tool..
Why discontinue one of the best trems they ever made..? Yes, I have the Lo Pro Edge too, which is excellent, but no fine adjuster tool on that.. That's very important to me, as extremely small differences in saddle position make a difference to the overall intonation, and a method of fine adjustment is imperative to get it perfect IMHO..
The ZR2 has the tool and is beautifully made, has no play in the trem arm, and feels great.. What a shame about the rattling bearings..!!