Glass lines

[PrimitivePete]

Is it common for takedown bow limbs to develop lines in the glass near the bolt hole ?

[Orion]

Are you talking underside of the limb?  If so, I wouldn't say it's common, but not rare either.  It's caused by the wood and glass expanding and contracting differentially due to temp/moisture changes, which is exacerbated with particularly tight fits.  You can stop it by chamfering the holes in the limbs (relieving/countersinking the glass just a little) and seeping a little super glue into the cracks that have already developed. 

[kennym]

Also, seal the bolt and pin holes well, if the wedge picks up moisture it swells and glass doesn't change with moisture...

[PrimitivePete]

Yep on the underside of the limb, I don't feel any separation, thank you for the reply

[Terry Green]

Yes.