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Thread: Basic Ball Drilling Jig
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26th October 2005, 07:15 AM #1New Member
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Basic Ball Drilling Jig
Problem: How to easily drill 37mm (and other sized) balls made from beechwood ?
Solution: Build a basic homemade jig.
Looking around my workshop I found a scrap piece of MDF 16mm thick by about 9” square. Next I marked out four equal quarters. In the centre I first drilled a 35mm socket 5mm deep with a forstner bit, then I drilled a 25mm x 5mm socket in the centre of the 35mm socket so that the ball of the size I want to drill sits comfortably. Then I turned the MDF over and I routed four 20mm wide x 8mm deep slots. Next I through routed four 10mm slots down the centre of the 20mm slots. These slots will take 10mm bolts later on. Then I found a couple of scraps of timber about 2” wide x 20mm deep and drilled a 35mm hole through both pieces. I cut the pieces into four lengths and trimmed the ends so that all four pieces, when positioned, would fit against the ball. Using double sided tape I positioned the four pieces of timber around the ball and turned the jig over so that I could mark out where to drill the holes in the timber pieces that would take the four 10mm bolts. After drilling two holes in each of the timber pieces, two holes to allow for greater adjustment, I placed 10mm bolts through the base of the jig with the heads of the bolt resting inside the routed slots. Each of the timber pieces are held in place by a 10mm bolt and wing-nut and are pushed up against the ball to hold it securely for drilling. I tried it out and I drilled a hole without any movement of the ball and that’s that! Crude but functional
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26th October 2005 07:15 AM # ADSGoogle Adsense Advertisement
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26th October 2005, 09:07 AM #2
hey ChazUK
can you post some piccies of the end result
thanks
|^^^^^^^^^^^^^^| |^^^^^^^^^^^^^| ||
| .....BIGGER ......._____| | ...BEER TRUCK.....| ||´|";,___.
|_..._...__________/====|_..._..._______==|=||_|__|..., ] -
"(@)´(@)"""´´" *|(@)(@) "(@)´(@)"""´´"*|(@)(@)****(@)
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26th October 2005, 09:38 AM #3New Member
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Sure, here's a pic, not very sharp, but I'll take some more close up soon. Pic shows the jig on the bench drill and you can just make out the hole in the centre of the ball
OK, here's another batch of pics, just click the links to view
Before Drilling Ball
During Drilling of Ball
After Drilling the Ball
Perfect 6mm hole ready for a dowel
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26th October 2005, 03:39 PM #4
cool, how do you make the balls ?
|^^^^^^^^^^^^^^| |^^^^^^^^^^^^^| ||
| .....BIGGER ......._____| | ...BEER TRUCK.....| ||´|";,___.
|_..._...__________/====|_..._..._______==|=||_|__|..., ] -
"(@)´(@)"""´´" *|(@)(@) "(@)´(@)"""´´"*|(@)(@)****(@)
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27th October 2005, 12:17 AM #5
Chaz, your jig looks good.
Did you try first tho' drilling a hole with a spade bit, then resting the ball in there & holding it by hand for drilling it?
For a 6mm hole I thought hand held might be OK.
Thanks for sharing the idea..............cheers...........Sean, well drilled
The beatings will continue until morale improves.
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27th October 2005, 03:43 AM #6New Member
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meerkat, I would love to say I turned the balls by hand on a lathe but my attempts at turning are about as useful as a chocolate teapot so instead I buy them ready turned online
scooter, I tried many ways to drill a ball using my bench drill but as it's a cheap 'n cheerful model it vibrates more than an earth quake so it had to be a jig to counter the vibration of the drill bit and as I've got 200 balls to drill a jig that can be setup quickly makes all the difference for me
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27th October 2005, 09:14 PM #7
Fairy nuff. 200! :eek: .
Cheers mate...............Sean
The beatings will continue until morale improves.
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