800, 1000, 2000, 2000 Abralon sanded.  More and more I see double #'s at the end such as 2000, 2000 in this example.  I do know what the point is when the ball is finished 800, 1000, 2000, but that second 2000 is where I get lost.

Sorry, is likely a dumb question.

 

Thanks for help,

Lon

Here's my assumption.  Since, manufacturers of bowling equipment use Haus type machines with slower speeds and move in a oscillating motion in their finishing dept.  You can not approximate these surfaces by using a higher speed spinner without the oscillation feature.  You might get close but it's impossible by using a spinner.  If it was me I'd use the spinner on the lower grit and them finish at the higher grits by hand.  Why?  You are removing the Ra/Rs surface values (the peaks and valleys) when using higher grits at high spinner speeds.  If you have a lower speed spinner then it might make sense.  Especially consider time and pressure by hand on the spinner.

 

BTW..... the Haus machines don't do sides like you would have to approximate on a spinner.  They oscillate.

 

When you listen to industry folks like Chris Schlemmer, Chuck Gardener, Jeff Ussery, Paul Figliomini....you hear them say they use abralon pads by hand at lot to adjust surfaces on tour.  I never hear them say spinner.  

 

Just my thoughts as I have quit using a spinner unless taking the ball down to a lower grit and starting over.  It's about the Ra/Rs values for me.

diz,

 

How does EBI manufacture/finish their equipment.  In "tubs in sanding pools" as you describe?  I am interested.

 

In this Ebonite Tour #1 at :16 sec if you stop it there you can see the Haus type machine set up.

This is Ebonite Tour #2  3:09 EBI's DeTerminator type machine to find PSA/MB.  4:00 another shot of their Haus type set up.