Material Handler HO scale 1:87

The model of a material handler in HO scale (1:87), inspired by a Sennebogen 850E from the 2000s.

This model was designed with FDM printing in mind but you might have better results with an SLA printer. If printed on an FDM printer, you will need a 0.25mm nozzle (or finer) and layer heights of 0.05mm.

I modeled all of the ts and then exported different positions of the moving parts. You will have to choose a position of the boom, arm and cab as well as decide to either print the open or closed grapple and the extended or retracted leggs. (I have provided multiple angles for each t but I can provide other positions / angles if needed)

I had to simplify some parts of the model, mostly the hoses (I only modeled half the number actually present on the real machine, one per cylinder instead of 2).

The model uses an M4 x 10 (or x12) bolt to secure the upper body to the base and the turntable.

The boom, arm and cab use 1mm or 1.8mm pins on all of the ts. the other ts are directly printed in the correct position (for the legs and the grapple)

EDIT 29/01/2025 :

I have added a new grapple (the style used for handling scrap metal, with 5 claws that close towards their center). It is now part of this model and is also available to anyone who has already bought it.

You will have to print :

base:
- 4x MaterialHandler_wheel
- 1x MaterialHandler_lader
- 1x MaterialHandler_platform
- 2x MaterialHandler_leggsMount
- 1x MaterialHandler_bottomSideL
- 1x MaterialHandler_bottomSideL
- 1x MaterialHandler_base
- 1x MaterialHandler_turntable

leggs (extended or retracted):
- 4x MaterialHandler_extendedLegg1
- 4x MaterialHandler_extendedLegg2
or:
- 4x MaterialHandler_retractedLegg1
- 4x MaterialHandler_retractedLegg2

top:
- 1x MaterialHandler_topBody

cabin (either in a low, middle or high position)
- 1x MaterialHandler_cabin
- 2x MaterialHandler_cabArmsUpper
- 1x MaterialHandler_cabArmLower

• 1x MaterialHandler_cabLiftCylinder_low or MaterialHandler_cabLiftCylinder_mid or MaterialHandler_cabLiftCylinder_high

boom :
- 1x MaterialHandler_boom_L
- 1x MaterialHandler_boom_R
- 1x MaterialHandler_boomAlignmentBlock

boom lift cylinders form 0° ( =horyzontal boom) to 60°:
-2x MaterialHandler_LiftCylinder_5deg
or 2x MaterialHandler_LiftCylinder_25deg
or 2x MaterialHandler_LiftCylinder_40deg
or 2x MaterialHandler_LiftCylinder_50deg
or 2x MaterialHandler_LiftCylinder_60deg

arm :
- 1x MaterialHandler_arm_R
- 1x MaterialHandler_arm_L
- 1x MaterialHandler_ArmAlignmentBlock

arm tilt cylinders from 0° ( =arm closest to the body) to 80° ( =furthest form the body) :
- 2x MaterialHandler_tiltCylinder_0deg
or 2x MaterialHandler_tiltCylinder_50deg
or 2x MaterialHandler_tiltCylinder_80deg

grapple (open or closed) :
- 1x MaterialHandler_grapleAlignmentBlock
- 2x MaterialHandler_grappleRotor
- 2x MaterialHandler_grappleside

• 2x MaterialHandler_grappleClosed or 2x MaterialHandler_grappleOpen

hoses for the t at the botom of the boom (use the same angle as for the boom lift cylinders) :
- 1x MaterialHandler_bottomHoses_5deg
or 1x MaterialHandler_bottomHoses_25deg
or 1x MaterialHandler_bottomHoses_40deg
or 1x MaterialHandler_bottomHoses_50deg
or 1x MaterialHandler_bottomHoses_60deg

hoses for the t at the top of the boom (use the same angle as for the arm tilt cylinders) :
- 2x MaterialHandler_topHose_0deg
or 2x MaterialHandler_topHose_50deg
or 2x MaterialHandler_topHose_80deg

For the scrap grapple, you will have to print :
(either in an open configuration, or closed / semi closed / semi open, which indicate the different positions of the claws).

• MaterialHandler_ScrapGrapple_Rotator
• MaterialHandler_ScrapGrapple_mainBody
• 5x MaterialHandler_ScrapGrapple_claw
• 5x MaterialHandler_ScrapGrapple_Cylinder_open (/closed/semiClosed/semiOpen)