Shattering Acrylics

[avbill]

but first let me share what I did up to this point .

I squared the blank with my drill with a barrel trimmer. high speed medium pressure.

I when processed to cut down the blank with a carbon tip [woodchucker] . I stopped at .480. I was making a sierra blank [.474] I started to wet sand 400 grit within half minute it get the results below. :frown:



CAn you advise me as to how this is happening as it has happen several time now. thanks

 

[1080Wayne]

My best guess would be that the fractures were started by the barrel trimmer . Suggest you switch to sanding the blank ends . Slower , I know , but fracture free .

 

[Pjohnson]

i agree 100% with the recommendation. I have switched to sanding to square up my blanks - acrylic and wood.

 

[redneckmedic]

Did you make these blanks yourself?

 

[CrimsonKeel]

so it broke sanding? Ive never had that happen.
so it looks like upon closer inspection its mother of pearl strips cast?
if so i bet they separated with the heat.
so drip thin CA into your ends after using your barrel trimmer. hairline cracks can eventually blow up a piece