Continued with the wheels today in two sessions posted here in one post.
Lost of hole cores for making smaller knobs.
Having two bench drills saves a lot of time stuffing around changing bits and related drill accessories. I use the ALDI WorkZone 500W for heavier work, here fitted with the hole saw for drilling the bearing flange clamp holes in the wheels and the smaller Ozito in the background for lighter work, here fitted with a homemade spindle sander.
Just added this Bunnings Craftright set to my collection, they have just two cutting teeth which gives a nice clean hole. Cost $30 bucks which is not bad.
Two discs make one wheel 34mm wide. After carefully marking out the top one and centre punching the drill points I bolted them together and drilled the pilot holes to transfer the layout to the bottom disc, then removed the bolt and drilled 4 x 44mm holes in each disc to allow clamps to be passed through later on for clamping when gluing and screwing the bearing flanges.
There is no glue that can bond Melamine to Melamine (the water in the glue has nowhere to go) so the discs are screwed together with 12 Torx screws. There are however special glues (Titebond Melamine Glue) that will bond Melamine to normal timber surfaces so each MDF bearing flange will be glued and screwed - two per wheel.
Here you can see how the four clamps will pass through to allow for clamping the bearing flanges.
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