This step and the previous one list the optional tools that can be helpful during assembly. You can build the Bear frame perfectly without them.

Files and deburring tool can be helpful to clean the printed parts.

It is good practice to re-grease the bearings during the assembly.

We recommend the use off a lithium based lubricant that has a viscosity between 50 and 100mm2/s at 40 °C, NLGI class 2 and a thermal resistance of 100°C or more.

A torque tool can be useful to ensure you apply max torque without damaging hardware.

We recommend max 4.5Nm for the metal to metal assemblies (e.g. joining plate on an extrusion) and max 1.5-2Nm for printed parts (e.g. y_rod_holder.stl on extrusion).