Bowling ball manufacturing - GIF

Bowling ball manufacturing.

<video controls autoplay loop style="max-width: 100%;">
<source src="https://diqn32j8nouaz.cloudfront.net/tooltalk_17735406503081586.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>



Previously:

<div style="display:inline-block; white-space:normal;"><span style="display:inline-block; text-align:center; vertical-align:top; width:150px; margin:0 15px 20px 0;"><img src="https://homemadetools-images.s3.amazonaws.com/hmt/1650125609_bowling_lane_oiling_machine_thumb.jpg" style="width:150px; height:100px; object-fit:cover;"><br><span style="display:inline-block; height:60px; overflow:hidden;">Bowling lane oiling machine</span></span><span style="display:inline-block; text-align:center; vertical-align:top; width:150px; margin:0 15px 20px 0;"><img src="https://homemadetools-images.s3.amazonaws.com/hmt/1666540764_inside_bowling_pinsetter_thumb.jpg" style="width:150px; height:100px; object-fit:cover;"><br><span style="display:inline-block; height:60px; overflow:hidden;">Bowling pinsetter in operation- GIF</span></span><span style="display:inline-block; text-align:center; vertical-align:top; width:150px; margin:0 15px 20px 0;"><img src="https://homemadetools-images.s3.amazonaws.com/hmt/1606069521_how_bowling_balls_made_thumb.jpg" style="width:150px; height:100px; object-fit:cover;"><br><span style="display:inline-block; height:60px; overflow:hidden;">How bowling balls are made</span></span><span style="display:inline-block; text-align:center; vertical-align:top; width:150px; margin:0 15px 20px 0;"><img src="https://homemadetools-images.s3.amazonaws.com/hmt/1648856903_how_bowling_pinsetters_work_thumb.jpg" style="width:150px; height:100px; object-fit:cover;"><br><span style="display:inline-block; height:60px; overflow:hidden;">How bowling pinsetters work</span></span><span style="display:inline-block; text-align:center; vertical-align:top; width:150px; margin:0 15px 20px 0;"><img src="https://homemadetools-images.s3.amazonaws.com/hmt/1690807336_inside_bowling_pinsetter_thumb.jpg" style="width:150px; height:100px; object-fit:cover;"><br><span style="display:inline-block; height:60px; overflow:hidden;">Inside a bowling pinsetter</span></span><span style="display:inline-block; text-align:center; vertical-align:top; width:150px; margin:0 15px 20px 0;"><img src="https://homemadetools-images.s3.amazonaws.com/hmt/1656602959_bowling_ball_balloon_thumb.jpg" style="width:150px; height:100px; object-fit:cover;"><br><span style="display:inline-block; height:60px; overflow:hidden;">Throwing a bowling ball through a giant balloon</span></span></div>

Somehow, I don't think such an elaborate process was used 5000 years ago when bowling balls were invented by the ancient Egyptians

Quote:

---

Originally Posted by Frank S

Somehow, I don't think such an elaborate process was used 5000 years ago when bowling balls were invented by the ancient Egyptians

---

You are probably right Frank they would have chiselled them out of a chunk of red granite and then made them so perfectly round that it rivals our modern machinery and then polished it so smooth you could see the reflection of fresh air . And to accomplish this all with mere copper chisels and pounding stones... Hmmmmmm https://www.homemadetools.net/forum/...cons/icon7.png

Does anyone here know why the initial plug is asymmetrical? Does that contribute to the spin; does it counter the material loss drilling the holes; is it balanced out by the second layer?
Or is it one of those things that if you told me you would have to kill me?

Quote:

---

Originally Posted by Karl_H

Does anyone here know why the initial plug is asymmetrical? Does that contribute to the spin; does it counter the material loss drilling the holes; is it balanced out by the second layer?
Or is it one of those things that if you told me you would have to kill me?

---

The stub on the core presumably ends up being the location of the thumb hole. My guess is that the asymmetrical shape forces the ball to spin on that axis when thrown, allowing the bowler to control the path of the ball with the angle of their thumb.

Not an expert opinion. My pathetic bowling scores will never be a matter of national security, so there's that.