Micro Servo Bracket for Cross RC UT4 Pro

What This Is

There’s a bracket on the Cross RC UT4 Pro that lets you have indepenent control of the front and rear diff locks with two servos, or to combine them and use just one servo for both.

However, a standard servo won’t fit, even with some cutting of the standard bracket. A micro servo won’t fit because it’s too small. The size that does fit is uncommon and you pretty much have to buy the Cross RC unit.

So, this bracket is one solution. to the problem. This bracket will allow you to fit a micro servo (like the Power HD TR4 or jxServo micro) to operate both diff locks at once, no cutting required. So much easier! Just be sure to use a strong servo!

From AsiaTees: jxServo HV1151MG

From Amazon: PowerHD TR4

What’s Included

The zip file below contains:

• RC-TNT Micro Servo Bracket for UT4 Pro.stl – 3D-printable STL file for the bracket to fit a micro servo;
• Installing servo.jpg;
• Print Orientation.jpg;
• Read Me.txt

How to Print

I printed in PLA+, though PLA, PETG and other rigid filaments should be fine. I’d suggest these settings:

– 0.4mm nozzle (or bigger)
– 0.24mm layer size (I used 0.3mm with my 0.6mm nozzle)
– 3 to 6 wall width (or wall or shell layers)
– 20% infill, cubic (10% minimum)
– Supports on base only, 7% angle. Only need to support the flat parts where the servo ‘wings’ mate to the bracket.

Installation

• Print per the above settings.

• Install servo into the bracket.

• Place into the UT4 diff lock servo area.

• Ensure you use the two extra triangular plastic mounts Cross RC supplies with the kit.

• This bracket is designed to screw into those as well as the other end of the mount plate.

• Continue with setup per manual for a single servo to do both diff locks at once.