What is this screw?

Hi all,

Here is a picture of my Ibanez SR 2405w premium bass. I see the two black screws for adjusting pickup height, but what is that black screw just below the right screw for pickup height? I have no idea what it does.
 

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Hi all,

Here is a picture of my Ibanez SR 2405w premium bass. I see the two black screws for adjusting pickup height, but what is that black screw just below the right screw for pickup height? I have no idea what it does.
If you are talking about pickup height why are you showing a picture of the bridge?
 
Hi all,

Here is a picture of my Ibanez SR 2405w premium bass. I see the two black screws for adjusting pickup height, but what is that black screw just below the right screw for pickup height? I have no idea what it does.
I believe @JRA is correct. This seems to be a set screw that locks the saddle into place after you adjusted the string spacing.
 
It looks to me....
The screws adjust the saddle height of each string. This has nothing to do with pickups. The screw below the right side allows you the tighten down the saddle once you have it positioned. That can be slid left and right to give some spacing option, then it can be locked in place.
 
It looks to me....
The screws adjust the saddle height of each string. This has nothing to do with pickups. The screw below the right side allows you the tighten down the saddle once you have it positioned. That can be slid left and right to give some spacing option, then it can be locked in place.
That's what I think too - there's no room for lateral movement on that bridge.
 
It's meant to adjust string spacing. See how the top two have clearance around the screw? And the bottom right screw has a shelf it clamps onto when you set the desired position? It looks like +/- 1.5 mm adjustment
The "top two" are set-screws (which adjust the saddle height), so if there's "clearance" around those, that a big "sloppy" problem!...

The "second (true/headed) screw" below those on the right side locks the saddle's position. Please refer to the .pdf in post #5.

Cheers,
 
Here is a picture of my Ibanez SR 2405w premium bass. I see the two black screws for adjusting pickup height, but what is that black screw just below the right screw for pickup height? I have no idea what it does.

Jesus, what did I write? Stupid. I meant "for adjusting string height". I have no idea why I typed "pickup". I did have a few beers last night when I wrote it. (in Japan)
 
The "top two" are set-screws (which adjust the saddle height), so if there's "clearance" around those, that a big "sloppy" problem!...

The "second (true/headed) screw" below those on the right side locks the saddle's position. Please refer to the .pdf in post #5.

Cheers,
There IS a slot there - I didn't see it. not a lot of wiggle room but prolly enuf for many folks.
Wish Hipshot did it that way on their BadAss bridge - the string width Allen lock screw is under the string and a pain to access.
 
The "top two" are set-screws (which adjust the saddle height), so if there's "clearance" around those, that a big "sloppy" problem!...

The "second (true/headed) screw" below those on the right side locks the saddle's position. Please refer to the .pdf in post #5.

Cheers,
Wrong. You posted the incorrect diagram. From the picture, it appears to be a 3 piece bridge. There's a mounting plate, a second plate above that for intonation, and then the saddle that mounts in a slot in that second plate. The two top screws adjust action from the second plate up. You have to get both screws even or the bridge will be tilted, similar to a fender bridge. The bottom right screw only moves the saddle (third uppermost piece) side to side. Look closer.
 
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Yeah, it's for string spacing. I didn't know I could adjust that. I've been playing around with my string spacing for the last hour. Was originally 18 (factory set), but I got it down to about 17 now. Much more comfortable for my hands since this is a 5 string 2405w (the w meaning wide).
 
Here is a picture of my Ibanez SR 2405w premium bass. I see the two black screws for adjusting pickup height, but what is that black screw just below the right screw for pickup height? I have no idea what it does.

Jesus, what did I write? Stupid. I meant "for adjusting string height". I have no idea why I typed "pickup". I did have a few beers last night when I wrote it. (in Japan)
Any geishas involved? Were you distracted by their shamisen skills?
 
It’s all grins and giggles until it isn’t. When I was a kid I “may or may not” have inadvertently blown up an amp too along the way. But more case in point, My own case in point; about three years ago, I bought a nearly new used Sandberg California California II TM5 Bass. Absolutely loved it and still do. Since I have done my own set ups for 5 decades +
i thought I’d make a small action adjustment. Started turning screws and and I thought nothing had happened. But suddenly I realized I changed one of the heights screws and the spacing screws. It took me a minute to figure out what I
Had done wrong. And to repair my screw up and get it back to square one.
Moral of the story is: with any piece of gear that is new or you were unfamiliar with, take the time to do a bit of research before you mess things up. A prime example would be the truss rod screws on a Pedulla bass which operate opposite to the de facto industry standard. Many owners and even experienced Luthiers have been fooled by them and done serious expensive damage. $$$ !
But the REAL point is, if you’re going to work on your own stuff, WHETHER YOUR CAR OR YOUR BASS or PLUMBING IN THE HOUSE .learn how to do it correctly. in some cases like tube amplifiers and modern DL amps with high voltage you can literally kill yourself if you don’t know what you’re doing. So it follows that if you’re willing to spend money, pick a number any number, take a minute DO YOUR RESEARCH FIRST. You should know your uses and needs, and the products that are available at your price point. I typically think in terms of how much can I afford to lose on this. But since i can be OCD about some of this stuff, I believe doing your homework is part of the job. I research the crap out of things. The more something is going to cost me, the more research I do. It also makes for far fewer expensive disappointments when buying.