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Bowlingballs can be made out of different materials:
polyester, urethane, reactive resin or particle. Most sport
bowlers use a reactive or particle bowling ball, while they
use a polyester ball as an spare ball.
You don't see urethane balls
very often anymore, mainly because a reactive or particle
bowling ball is a lot easier to bowl with.
Bowling balls come in different
weight, from 6 lbs up to 16 lbs. It used to be that how heavier
the ball was, the better it was. If the ball was heavy, the
chance on deflection off the pins was smaller.
Due to the arrival of reactive
resin, it doesn't really matter anymore if you bowl with a
16, a 15 or even a 14 pound bowling ball.
Inside a bowling ball you
find the weight-block and this is a key factor in the amount
of action and hook of a bowling ball. In a ball that should
go straight you will see an ordinary round weight-block.
Usually there are three holes
in a bowling ball, two for your fingers (your middle finger
and ring finger) and one hole for your thumb. You can put
your fingers in the bowling ball in two different ways, namely
conventional and finger-tip.
The advantage of finger-tip
over conventional is that with finger-tip you can lift the
bowling ball much better, which creates more action and hook
on the bowling ball.
Sometimes you also will see
a fourth, non-gripping, hole in the bowling ball. This is
usually the balance hole, which makes sure that the ball drilling
will come back into ABC regulations.
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