Bridge plate crack

[tofu12]

https://ibb.co/gQMq0a

Hello. This is S.Yairi YE-50. Currently can't tune it because of the crack on the bridge plate, so I want to repair this. I looked it up by myself and I understand that I better replace it, but I'd like to go with rosewood dust and glue for this. Can anyone direct me which glue I should use? And can I polish the place with sandpaper to erase the scratches? or should I get some wood stain? Thanks for reading.

[phavriluk]

Ambiguous moment here. OP, are you discussing the bridge plate reinforcement on the inside of the guitar top or the bridge itself where the strings attach?

[redir]

The image clearly shows a problem with the bridge itself. Assuming that is the case you don't want to just fill that with saw dust and glue. It simply will NOT work. You might be able to get away with gluing and clamping it however. You may want to try that first and if that fails replace the bridge.

[Bax Burgess]

Could be caused by a decrepit bridge plate. The op could go to frets.com and find out how to address this. I'm considering the option of gluing underneath an additional bridgeplate of maple for one of my guitars, before the bridge cracks.

[Howard Klepper]

Use cyanoacrylic glue, medium thin. No dust. Tape the top for protection if the glue runs.

[mirwa]

Rosewood loves superglue and bonds pretty well, but, personally I would replace it with e new one.

Steve

[peter.coombe]

I would try superglue first and if that fails, replace the bridge. The crack is in a bad place, so superglue may not hold, but it is really suck it and see.

[Ned Milburn]

Others have pointed this out. Your terms are wrong. You are talking of the "bridge". The bridge "plate" is under the top wood.

Others have also pointed this out: It is a structurally weak point to repair, so any glue repair could give only limited time before it may split again.

[John Arnold]

This is a difficult repair because the saddle has side force on it. If the saddle is loose at all, it will lean, and increase the chance of failure.
Saddles that lean or are too tall are a major cause of this.
The saddle slot should be deep enough that at least half the saddle is inside the bridge.
The pickup (under saddle transducer, or UST) may be a contributing factor. It will reduce the amount of saddle in the bridge, and pickups require the saddle to be slightly looser to work well.

[Mr Fingers]

I think Redir has it right. You should at least try the fix before you remove and replace. I sincerely doubt that there is anything wrong with the interior plate, as that split is very common for the reasons John Arnold describes. But w/ superglue and clamp (if you can get one set up to apply front to back pressure) there is quite a good chance of achieving a solid and invisible bond. No sawdust: that will interfere with getting max closure. Removing the original bridge and installing a new one is a much more intrusive action. Sure, these splits can just reoccur, but this one looks fixable and sometimes the glue will be stronger than the wood was. Good luck. Personally, I'd glue it. I never remove bridges unless I really have to.

[tofu12]

Oh sorry, I had a wrong idea. Yes, it's "cracked bridge". Not bridge plate.
Thank you guys for all advice, these really help me a lot. I'm going to try cyanoacrylate, with no dust. Thank you.