Anet A6 A8 filament guide roller

thingiverse

This bearing guide with large roller prevents kinking of the filament while guiding it over the printer with low friction. The filament can be added or removed through the opening at the top of the guide and can also be clamped there. The printed spring in the clamp ensures a tight fit and makes it suitable for a small difference in thickness of the acrylic plate, mine being about 7.7 mm thick. If printed correctly, the end caps snap securely onto the axles and into the vertical bearing within the clamp. Three 608 ball bearings are required to make this. I ordered inexpensive ones here: https://www.aliexpress.com/item/32858788270.html I removed the seals from these cheap bearings and washed them with degreaser to reduce friction as they roll. Note: These inexpensive bearings from China have an inaccurate internal diameter of about 8.06 mm, which is approximately 0.08 mm larger than those made by SKF. The download contains parts for both bearing types. The "larger diameter" parts fit the cheap Chinese bearings. If necessary, use your slicer's scaling function to create a perfect fit. All parts except the end cap were printed with a layer height setting of 0.2 and 30% infill using PETG filament. Used wall thickness: Clamp: 1.6 Guide: 2 Roller: 1.2 Axles: 1.6 (bottom thickness: 2 for full solid flange) End caps: 1.6 If the end cap is printed with a layer height setting of 0.15, it will slide more smoothly on the axle printed with a layer height setting of 0.2. Changed since July 30, 2019: * A wider clamp has been added for increased stability. * The cutout in the guide has been modified to allow for more secure filament clamping. * Spacers have been deleted and integrated into the guide. * The roller design has been changed so that bearings are flush with the outside of the roller. Changed since August 6, 2019: * The clamping force of the end caps has been improved. * Bearings fit better in the roller, and a roller with support has been added. Changed since August 21, 2019: * Axle and end cap diameters have been adjusted due to under-extrusion issues with my extruder. * End caps now have room for possible filament bulges printed on the axle ends.