CR-10 Mini Z-Axis Brace Brackets

thingiverse

CR-10 Mini Z-Axis Brace Brackets, Designed for Maximum Versatility These brackets will probably fit other CR-10/Ender series printers with some threaded rod length adjustments. The upper bracket is long enough to clear the print head assembly and a BLTouch bed probe when the head is fully raised. It may also be long enough to clear the print head on taller printers or those with other bed probes. All hardware for the braces is 1/4-28; I chose this thread pitch for finer adjustment capability. The bracket mounting hole spacing is 20mm on center, allowing for parallel or perpendicular mounting across a 40mm extrusion, depending on your application. You may need to ream out the holes for the mounting hardware slightly. If the screws are too tight, they won't allow the T-nuts to swivel into position. I used a #21 (0.159"/4.04mm) bit and it worked well. Detail photos show my trial fitting using regular nuts and 1" bolts. Final installation used the specified hardware below. To install these brackets, you will need to print two upper and two lower brackets and use the following hardware: (4) 1/4-28 Nuts (4) 1/4-20 Nylon Lock Nuts (4) 1/4-20 x 1-1/4" Pan Head Screws (8) 1/4" Washers (4) 1/4-28 Internally Threaded Ball Links (8) 4x10mm Socket Head Cap Screws (8) 4mm Tee/Hammer Nuts (2) 17" long pieces of 1/4-28 Threaded Rod Hex or socket head screws can be used as well, but I found pan heads looked better. Use thin washers, as there's only space in the brackets for 0.10" total washer thickness. You can find them at local home improvement stores like Home Depot. The ball-ends allow for over 3/4" thread depth, and the 17" rod length provides almost an inch of total length adjustments while allowing at least 3/8" of thread engagement on each end. On my printer, I have just about 9/16" engagement in each ball joint. When assembling, slightly loosen the mounting screws for the vertical gantry 'legs' and adjust the length of your threaded rod assembly so the vertical leg is pushed/pulled square to the bottom frame. Then snug everything up and check for square again, adjusting if necessary.