Input Material
Input: Failed prints, support material, rigid plastic scrap from your desktop printer
- Processes up to 5 kg/h of PLA/ABS/PETG scrap
Desktop & R&D Units
3D Printer Shredder for Failed Prints and Desktop Regrind
A compact 3D printer shredder for print farms, labs, and makerspaces turning PLA, PETG, ABS, supports, and failed prints into 3-6 mm regrind for filament extrusion and material trials.
- Throughput: up to 5 kg/h
- Particle size: typically 3-6 mm
- Materials: PLA, PETG, ABS, PP/HDPE caps
- Power: 110V/220V
How It Works
A compact cutting workflow for repeatable sample preparation and regrind collection.
1
Material Preparation
Sort by polymer, remove obvious contaminants, and cut pieces to fit the 120 x 200 mm feed opening.
2
Knife-Based Shredding
Geared 1.5 kW drive and dual knife sets reduce material to controlled regrind size.
3
Forward / Reverse Clearing
Reverse mode helps clear occasional bridging without opening the cutting chamber.
4
Regrind Collection
Output is collected and routed to storage, drying, or small extruder feeding workflows.
Key Benefits
Compact Footprint
Fits small workshops, laboratories, and pilot lines where floor space is limited.
Controlled Regrind Output
Typical 3-6 mm output range supports downstream handling and lab-scale process consistency.
Flexible Voltage Options
Configurable 110V/220V electrical setup for different regional use cases.
Industrial Power & Durability
1.5 kW industrial motor (5× power of typical units) and H13 tool steel blades that handle abrasive CF-filled and PEEK filaments.
Problem-Solution Fit
Problem
Small labs and makerspaces need reliable plastic size reduction but have no room or budget for industrial shredders.
Rumtoo Solution
True desktop footprint (fits on standard lab bench) delivers industrial-grade shredding with only 110/220V power and <1 m² space.
Problem
Irregular 3D print scrap shapes frequently jam compact cutting chambers.
Rumtoo Solution
Forward/reverse jog control + wide 180 mm throat allows instant jam clearing in <30 seconds, no tools required.
Problem
Inconsistent regrind particle size ruins lab extrusion trials and material validation data.
Rumtoo Solution
Precision knife geometry + adjustable feed rate produces uniform 4–8 mm regrind, ensuring repeatable trial results every time.
Problem
Mixed contamination and soft materials accelerate knife wear and reduce uptime in daily use.
Rumtoo Solution
H13 tool steel knives + defined feed preparation extend service intervals to 300+ hours in controlled lab environments.
Equipment and Material Showcase
See how desktop 3D printing scrap is converted into downstream-ready regrind.
Output Material
Output: Consistent 4-8 mm regrind, ready for filament extrusion or pelletizing
- More predictable downstream throughput
- Uniform particle size for better extrusion consistency
- Easy quality control in lab environments
Video Demonstration
Quick view of feeding, cutting, and output behavior under small-batch operation.
Applications
3D Printing Scrap Processing
PLA, PETG, ABS failed prints and offcuts for pilot recycling workflows.
Bottle Cap and Rigid Sample Regrind
HDPE/PP cap streams and rigid sample preparation for material validation.
Educational and Training Labs
Hands-on learning for material circularity and recycling process understanding.
Filament Feed Preparation
Pre-size regrind for small extrusion or filament-making trials.
Small-Batch Product Development
Rapid test cycles for regrind behavior before scale-up decisions.
Pilot Waste Sorting Programs
Early-stage reduction and handling validation for new plastic recovery projects.
Technical Specifications
| Parameter | Specification | Notes |
|---|---|---|
| Feeding Port | 120 x 200 mm | Confirm max input piece size |
| Target Output | 3-6 mm | Material dependent |
| Typical Throughput | 1-5 kg/h | Depends on polymer and feed prep |
| Blade Set A | 22 rotating + 22 fixed, 5 mm | General purpose cutting |
| Blade Set B | 36 rotating + 36 fixed, 3 mm | Finer output preference |
| Blade Material | H13 industrial steel | Wear depends on contamination |
| Motor Power | 1.5 kW with gearbox | Forward/reverse supported |
| Voltage | Customizable 110V / 220V | Specify region when ordering |
| Machine Weight | 101 kg | Excluding packaging |
| Overall Size | 650 x 300 x 780 mm | L x W x H |
Specifications are reference values. Final setup depends on material type and trial objective.
Why Choose This Mini Desktop Shredder
| Criteria | Typical Hobby/Entry-Level Cutters | Rumtoo Mini Desktop Small Shredder |
|---|---|---|
| Cutting Stability | Prone to vibration and inconsistent particle size | Precision geared drive + fixed knife geometry for uniform 4-8 mm regrind |
| Operational Control | Limited jam recovery; manual intervention required | Forward/Reverse jog control + quick-clear access for <30s jam recovery |
| Material Adaptability | Narrow feed range; mainly soft filament | Handles rigid PLA/ABS/PETG/PC scrap and pre-shredded lab feedstock |
| Scale-Up Readiness | Poor data transferability to production equipment | Generates repeatable trial data directly transferable to pilot & industrial lines |
| Noise & Lab Compatibility | Often >75 dB, unsuitable for shared lab space | <55 dB quiet operation + standard 110/220V plug-and-play |
Frequently Asked Questions
Does this shred Bambu Lab, Voron, or Prusa failed prints?
Yes, it handles PLA, PETG, ABS, and PC failed prints from all major FDM printers. The 1.5kW motor and industrial-grade blades easily process thick rafts and solid infill pieces that often jam hobby-level units.
Can it handle CF-filled, GF-filled, PEEK, or TPU filaments?
Absolutely. Unlike hobbyist shredders with stainless steel blades, our unit uses H13 tool steel knives that handle abrasive Carbon Fiber (CF) and Glass Fiber (GF) filled materials. It also has the torque required for high-temp PEEK and the cutting precision for flexible TPU.
Does shredding PLA or ABS release fumes?
Shredding is a mechanical process, not a thermal one. Since the plastic is not being melted, no hazardous fumes are released. We recommend a dust collection system if processing large volumes to avoid inhaling fine plastic dust.
How fine do I need to shred for Filabot / 3devo / Felfil extruders?
Most desktop extruders like Filabot, 3devo, and Felfil require regrind between 3mm and 6mm for consistent screw feeding. Our shredder produces a 3-6mm output by default, which is the ideal size for these systems.
Can I mix colors when shredding PLA?
You can, but it will result in a mixed color filament (often grey or brown) when re-extruded. For best results and color consistency, we recommend sorting your failed prints by color before shredding.
Why does recycled PLA become brittle and how does shredding affect it?
PLA degrades slightly with each heat cycle. Shredding prepares the material for re-extrusion. To minimize brittleness, ensure the regrind is perfectly dry before extruding and consider mixing in 20-50% virgin pellets for better structural integrity.
How does this compare to Felfil Shredder+ or Polystruder GR PRO?
The Rumtoo Mini Shredder features a significantly more powerful 1.5kW motor (vs ~0.3-0.5kW) and industrial H13 steel blades. This allows it to handle larger, solid failed prints and abrasive materials that might stall or dull entry-level units.
What is the regrind yield from 1kg of failed prints?
The yield is nearly 100%. Thanks to the direct-drop design, there is minimal material loss. 1kg of scrap prints will typically result in ~0.98kg of usable regrind.
Need a Mini Shredder for Your Lab or Pilot Workflow?
Send your material type, target output size, and throughput expectations for a recommended configuration.
Go to Contact FormExpert response within 24 hours. No obligation quote.