General

This idler was designed to be mounted on the X-Axis of the TEVO Tarantula and uses 626 ball bearings. This idler is also usable for other printers with a 4020 extrusion profile as an axis. Please let me know if there are other printers where this idler also works. The idler is seperated from its regular mounting option so the carriage for Z-Movement gets balanced. This Idler is used the best way with the stock X-Carriage. This design is not usable with MGN12 linear rails due to the fact that the GT2 Belt will rub against the MGN12 rails.

This design is an addition to my 608 ball bearing Y-Axis idler which is called GIRO - TEVO Tarantula / 608 Ball Bearing Y-Axis Idler.

You will need additional screws and washers for the mounting of the idler. The needed parts are mentioned below.

Additional screws and washers

1x M3x25 or M3x30 screw with a hexagonic screw head

1x M3 Washer

1x M3 Nut

2x M4x10 screw

2x M4 Washer

2x 626 Ball Bearing

Printing

I would recommend to use 2 perimeters. Print with a lower speed, for example 30 mm/s, to get a more accurate printing. I recommend to print the idler with at least 50% Infill for the bracket and 100% infill for the pulley and pulley insertion.

GIRO - TEVO Tarantula / 626 Ball Bearing X-Axis Idler

0.2mm layer, 2 walls, 15% infill