Simple 2DoF Leg Assembly Instructions

Last modified by Eric Nantel on 2026/04/02 16:01

Simple 2DOF Leg Assembly Instructions

Updated August 30, 2007

Safety first! Wear eye protection and never touch a powered robot!

Note: Do not use Loctite or thread locks on the assembly. They are not necessary and may cause damage to the Lexan.

Simple 2DOF Leg — Assembly
Step 1 / 7

Attach the Multi-Purpose brackets together as shown, using two 2-56 x .250 screws and 2-56 nuts.

2x
2-56 x .250" Phillips screw
2x
2-56 nut
Figure 1.
Simple 2DOF Leg — Assembly
Step 2 / 7

Attach the ball bearing that comes with the offset "C" bracket to the Multi-Purpose bracket as shown. See the diagram below for detailed information.

Ball bearing assembly diagram
Figure 2-2.
Simple 2DOF Leg — Assembly
Step 3 / 7

Attach a tubing connector hub to the offset "C" bracket, using two 2-56 x .250 screws and 2-56 nuts.

2x
2-56 x .250" Phillips screw
2x
2-56 nut
Figure 3.
Simple 2DOF Leg — Assembly
Step 4 / 7

Attach the offset "C" bracket to the Multi-Purpose bracket as shown. See the diagram below for detailed information.

Bracket assembly diagram
Figure 4-2.
Simple 2DOF Leg — Assembly
Step 5 / 7

Connect a 3.0" tube to the hub using a 4-40 x .250" screw. Attach a rubber foot to the end of the tube.

1x
4-40 x .250" socket head screw
Figure 5.
Simple 2DOF Leg — Assembly
Step 6 / 7

Install the servos as shown, using the included 3mm hardware and two #2 tapping screws. For quick prototype assembly, you can use rivet fasteners (sold separately: NSRF-01) as illustrated. The HS-422 servo goes in the horizontal position, and the HS-475HB servo goes in the vertical position.

2x
#2 x .250" tapping screw
8x
3mm servo hardware set
Figure 6.
Simple 2DOF Leg — Assembly
Step 7 / 7

Now the leg is ready to be attached to a body. Use two #2 tapping screws. These parts are included in the lexan chassis kits or the Long "C" brackets for an aluminum chassis.

2x
#2 x .250" tapping screw
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Created by Eric Nantel on 2024/07/03 09:20
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