CR10/Ender 3 bed spring shim

thingiverse

Small 12 mm diameter, 15 mm tall shim/spacer for bed springs for the Creality CR10/Ender 3 series, and other printers that use M4 bolts and 8 mm diameter springs for bed leveling screws. The stock springs are relatively weak, and when the adjusting knobs are loosened there is often inadequate tension in the springs to keep the knobs from vibrating loose. A common solution is to get stringer springs, but for a nice DIY solution you can print these spacers/shims and put them under the springs on the Y gantry. These shims are 5 mm high on the inside and have a total height of 15 mm, so the bottom 10 mm of the springs are covered to keep the springs from trying to "walk" and to improve compression force on the springs. Since these shims will be well below the bed any bed heat should not cause distortion of the plastic. A separate shim is provided without the external walls if you want to be able to see the entire spring. This is essentially a 5 mm tall washer with an outer diameter of 12 mm and internal hole 4.5 mm to accommodate the M4 screw.