magnetic building board-Adjustable hold downs

thingiverse

Here is a new attachment for you. It replaces or supplements the "magnetic building board-Adjustable hold downs" but whereas they were limited to a maximum thickness of 6.5mm or just over a 1/4", these go up to 20mm or 3/4" at which point you would switch attachment to the single or dual pole hold downs. The attachment flips 180° to accommodate all sizes in between 0mm and 20mm They can still be used same as the older version was/is, I will leave the older design up and available if needed. Hold down that can be used for balsa strips or sheets, Varying thickness' accommodated. Has a 3/16 elongated hole that fits perfectly on standard building board magnets, see picture, you can use wing nuts, std nuts or I use a lock nut, just firm tighten, allows you to slide the hold-down up and down for different thickness. You may also be able to lower the plastic Hold-down onto the wood gentle then roll the plastic piece until the required pressure is achieved. Edit and Update. I have changed my attachment method using half profile nuts and small piece of silicone fuel tubing to hold the wanted pressure on the sliding piece. See Picture. Print Settings Printer Brand: Up! Printer: Up Mini Rafts: Doesn't Matter Supports: Yes Resolution: 0.25mm Infill: 40% Notes: I used medium resolution 0.25mm the 3D printing process has a desirable outcome, that is, when printing flat as in the STL layout, the layer ridges from the printer help hold the Balsa against the magnet plates. Use a #10 bolt or 3/16 bolt with length 16mm or so, depending on the brand of bolt, you may need to grind the head down slightly.