BallReviews

General Category => Coverstock Preparation => Topic started by: NHS on September 01, 2015, 08:38:22 PM

Title: Ra values
Post by: NHS on September 01, 2015, 08:38:22 PM

I'm trying to find some place that has the ra values for any ball, but haven't had any luck.   Does anyone have any idea where I can find them ?

Title: Re: Ra values
Post by: kidlost2000 on September 01, 2015, 10:09:49 PM

Likely would have to contact the manufactures for that information.

Title: Re: Ra values
Post by: tommygn on September 02, 2015, 08:11:41 AM

Ra values change as a ball is continually rolled down the lane, and the cover changes, and or you personally make a surface change to the ball.

However, Bowlers Journal lists Ra values of the factory surface in their ball review section. I believe they use the JayHawk surface scanning machine to get the Ra value and effective surface grit.

Title: Re: Ra values
Post by: NHS on September 02, 2015, 01:40:20 PM

Thanks tommygn,  the information in BJ was just what I was looking for.