Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
Hole Saw Enlarging Centering Cone
This cone stops a hole saw from wandering when you enlarge an existing 14–50 mm hole. You put the cone on a scrap board under the workpiece and let the old hole settle onto its 30° slope, which centres the hole. The arbor pilot bit then runs into a 6.7 mm guide bore that fits 1/4 in and 6 mm pilot bits. The cone is 56 mm across and 13.4 mm tall, has sight rings at 20, 30 and 40 mm hole diameters, and has three counterbored #6 screw holes for fixing it to the scrap board.
Hole Saw Six-Cone Bench Stand
A bench stand with six hollow tapered cones. Each hole saw sits upside down over the cone that matches its inside diameter. The cones cover a 14–52 mm ID range in overlapping 8 mm steps, so saws from about 3/4 in to 2-1/8 in (17–56 mm OD) seat snugly without you measuring anything. Two wells at the front hold a hex-shank arbor (15 mm bore) and a pilot drill (8 mm bore). The base is 166 x 106 mm, so the whole kit stays together on a shelf.
Air Hose Wall Pass-Through Trumpet
This screw-on grommet fits a 1-1/2 in (38.1 mm) hole-saw hole. It lets an air line, shop-vac hose or extension cord pass through a garage wall or into a compressor closet without the hose rubbing on raw drywall or stud edges. The part has a 76 mm flange with three countersunk #8/M4 screw holes (4.5 mm) and a 28 mm bore that flares at 45° to 40 mm on the room side. A 25 mm crush-ribbed sleeve press-fits the hole.