You can. However, it is not recommended.
Some individuals will drill their holes into bowling balls. However, these individuals have experience drilling bowling balls. The process can go awry if you lack the necessary expertise.
Contrary to popular belief, there is much more to drilling a bowling ball than measuring fingers and pulling out a drill bit. Additionally, careful consideration must be given to the placement of the holes.
Additionally, the drill bit must be extremely sharp. Due to the complexity of the procedure, even professionals occasionally make errors.
If someone has never completed a task of this nature before, we do not believe they will succeed.
No YouTube tutorial or Instructable guide will provide all the information necessary to drill bowling balls. It takes a considerable amount of time to develop this skill.
If holes are improperly drilled, the bowling ball will crack. If your bowling ball has broken due to drilling, it must be replaced.
A replacement bowling ball will likely cost more than what you would have paid to have it repaired by a professional, to begin with.
Before you even consider the cost of the drilling equipment, you probably had to purchase it.