win a ball from Bowling.com

Author Topic: How much weight can you remove with deep finger holes  (Read 3938 times)

bowling_rebel

  • Full Member
  • ***
  • Posts: 159
How much weight can you remove with deep finger holes
« on: December 21, 2021, 06:14:04 PM »
Doing the math, I think this is correct

Volume of a bowling ball is 267.947 cubic inches

Volume of finger holes calculation:

Radius of 31/32 finger hole is 31/64 or 0.474 inches
Maximum finger hole depth is 4.5 inches

Volume of cylinder  V = π r squared h
Just google volume of cylinder and all you need to do is put in numbers:

At 4.5 inches a finger hole takes out 3.31719 cubic inches
Double this for two finger holes little more than 6.6 cubic inches.

6.6/267.947 = 0.0246% of the volume of the bowling ball is removed with two finger holes drilled to  4.5 inches.

A 14.0 pound ball has 224 ounces
224 X 0.0246% = 5.5 ounces

So a 14.0 pound ball, with 2 finger holes drilled 4.5 inches will end up being 13 pounds 11.5 ounces

A 15.0 pound ball has 240 ounces
240 X 0.0246% = 5.9
rounding that up to 6.0 ounce
A 15 pound ball with 2 finger holes drilled to 4.5 inches would end up 14 lbs 11 ounces


Of course since the weight block is more dense, what balled is drilled, and what layout will change how much of the heavier weight block is removed, so the above is only an estimate.

Why did I do this math?
I have one ball, which despite being a 14 lb ball, just feels heavier than my other 14 lbs balls.
So was thinking about just having really deep finger holes drilled.
I should probably weight it my other 14 lbs stuff to compare first.
The ball came at 14.4 ounce of of box
My other 14 pound balls: once came in at 14.1 out of back. The others were plugged, formerly had thumb holes - so those are lighter. 
 

 

bullred

  • Sr. Member
  • ****
  • Posts: 300
Re: How much weight can you remove with deep finger holes
« Reply #1 on: December 22, 2021, 12:17:08 AM »
After being on the site for many many years this is the most asinine, stupid post I have ever read.  And I have read some dandy's

ignitebowling

  • Hero Member
  • *****
  • Posts: 981
Re: How much weight can you remove with deep finger holes
« Reply #2 on: December 22, 2021, 10:54:43 AM »
The ball weight on the box isn't correct most of the time. May want to use a scale to see what the ball weighs first



Also here is a chart for when you decide to start removing said weight.

https://www.jayhawkbowling.com/Pro_s_Corner/Pro_Shop_Forms/weightremoval.pdf
Ignite your game, and set the lanes on fire. www.facebook.com/ignitebowling  or @ignite_bowling

TWOHAND834

  • Hero Member
  • *****
  • Posts: 4331
Re: How much weight can you remove with deep finger holes
« Reply #3 on: December 22, 2021, 01:29:19 PM »
After being on the site for many many years this is the most asinine, stupid post I have ever read.  And I have read some dandy's

Did you find some coal in your stocking because you seem so full of Christmas cheer. 
Steven Vance
Former Pro Shop Operator
Former Classic Products Assistant Manager

itsallaboutme

  • Hero Member
  • *****
  • Posts: 2001
Re: How much weight can you remove with deep finger holes
« Reply #4 on: December 22, 2021, 01:39:22 PM »
Depending on the ball, you may change the reaction drastically if you drill both finger holes 2 inches deeper.  The change of reaction may not be worth the change in gross weight.

johns811

  • Hero Member
  • *****
  • Posts: 1095
Re: How much weight can you remove with deep finger holes
« Reply #5 on: January 01, 2022, 08:18:13 PM »
I would find an old balance hole weight removal chart

BowlinStr8t

  • Full Member
  • ***
  • Posts: 237
Re: How much weight can you remove with deep finger holes
« Reply #6 on: January 03, 2022, 04:25:01 PM »
Irony--I just threw my old balance hole removal chart in the trash can about a week ago. 
#Radical #Vise #Bowl4Life #360Gritisntenough