PRESSROTANS – 1:20 Scale Rear Loader STL Kit

Low Detailed Class – Easy Level Assembly

PRESSROTANS is a 1:20 scale rear loader module inspired by a Rotopac-style rotary compactor system, developed with focus on structural coherence and practical 3D printing.

Detail Level: Low Detailed ClassAssembly Level: Easy ChallengeEstimated Parts: ~100

The geometry was designed to reproduce the mechanical logic of a rotary refuse compactor while maintaining accessible printability and clean assembly.

Designed for integration with the ROMVLVS 1:20 chassis platform.

A Rotary Compactor Miniature Built with Mechanical Logic

PRESSROTANS replicates the structural concept of a rear loader equipped with a rotational compaction system.

The internal architecture simulates:

• Rotary container movement• Structural housing• Rear loading system• Mechanical support frame

All components were proportionally developed to reflect real-world mechanical logic within scale limitations.

Technical Overview

• Scale: 1:20• Approximately 100 individual components• Rear loader module (Rotary Compactor Style)• Modular integration with ROMVLVS chassis (4x2 and 6x2 included)• Organized STL file structure• Compatible with standard FDM printers

The project prioritizes:

• Clean part segmentation• Controlled tolerances• Efficient print time• Straightforward assembly alignment• Majority of parts designed to print without supports

Motorization Ready Design

Optimized for container rotation motorization.

• Dedicated mounting piece for DC 12V 25GA-370 motor• Secure screw-based motor fixation• Gear interface designed for torque multiplication

Recommended operating speed:≤ 280 RPM for improved torque and realistic scale movement.

With a 1:5 gear ratio between the motor pinion and container gear, the system may deliver approximately:

~12.5 kg·cm (≈1.2 N·m) torque at the rotation axis.

This provides strong rotational capability for scale operation.

Printing Recommendations

• Materials: PLA, ABS, PETG or Tritan• Layer height: 0.15–0.20 mm• Infill: 15–40% depending on structural requirements• Supports required for specific components

If printing with multiple ABS colors, pay attention to part grouping during preparation.

What You Receive

• Complete digital STL files• Organized part structure• Ready-to-print components• Instant digital download after purchase

No physical unit will be shipped.

Advantages of Purchasing STL Files

• Instant download — no shipping delays• Print anytime• Choose your preferred material• Select colors and finishes• Control print quality• Reprint individual parts if needed• Modify or customize for personal projects

Model fully developed by Fabrica Modelorum. Redistribution by any means is strictly prohibited.

You can follow the project and see it operating on YouTube:

FABRICA MODELORVM