Reply by REO

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Posted on How to drill holes in rubber balls?

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928 posts in 2073 days

#1 posted 09-29-2013 10:15 PM

Elisabeth you will most likely have trouble with the drill self feeding. Your idea about clamping on top and drilling through the clamp is a good one! set the depth stop on the drill as well so the drill doesn’t get sucked totally through the ball.

You can make a shaped clamp by drilling a pocket hole with the correct size forstner bit. drill so that the top surface of the ball hits at the same time as the edge of the hole. It needn’t be the same diameter as the overall diameter of the ball. If you screw two pieces of stock together and drill a pilot hole through then use the forstner to make the indentations in each half to the proper depth you can position the bottom piece on the table and clamp that first. Then clamp the ball in place with the second peice useing screws where they were used to hold the pieces in place to initially drill the pilot hole. Set the drill stop and have a go. The spur bit would probably be your best bet for the actual hole in the ball.

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