One of the first questions we get from people shopping for a shredder is: do I need 14 blades or 21 blades? It's a fair question — blade count isn't just a spec, it changes how the machine performs. Here's what actually matters.
What Blade Count Actually Changes
More blades means more shearing cuts per rotation, which generally means:
- Faster throughput — more material gets cut per pass
- Finer, more consistent flake — useful for extrusion and injection work that needs uniform particle size
- More torque demand on the motor — which is why 21-blade units are typically paired with more robust drivetrains
Fewer blades isn't a downgrade — it's a different tool. A 14-blade shredder is simpler, easier to maintain, and often plenty for lower-volume or hobbyist workflows.
14-Blade Shredders: Who They're For
Our 14-blade shredders are a solid fit if you're:
- Just getting started with plastic recycling
- Running a small workshop, classroom, or maker space
- Processing lower volumes of plastic on a regular basis
- Looking for a lower upfront cost without sacrificing build quality (our 14-blade units range from $650–$2,895 depending on configuration and stainless steel finish)
21-Blade Shredders: Who They're For
The 21-blade shredder, including our version with an integrated hopper for continuous feeding, is built for:
- Higher-volume operations, including small recycling businesses
- Batches that need finer, more consistent flake for extrusion or injection
- Workshops that process plastic frequently enough that throughput speed matters more than upfront cost
Quick Comparison
| 14-Blade | 21-Blade | |
|---|---|---|
| Best for | Hobbyists, small workshops, beginners | Higher-volume shops, small businesses |
| Throughput | Moderate | Higher |
| Flake consistency | Good | Finer, more uniform |
| Starting price | $650 | $750 (with hopper: $899) |
Don't Forget Mesh Size
Blade count works together with mesh size (we run 6mm mesh across our lineup) to determine your final flake size. If you're planning to feed flake into an extruder or injection machine, mesh size matters just as much as blade count — that's worth factoring into your decision alongside throughput needs.
Still Not Sure?
Blade count, motor size, and mesh all need to line up with what you're actually planning to recycle and at what volume. If you want a second opinion before you buy, contact us — we'll help you match the machine to your actual workflow instead of guessing.
Browse the full lineup: Shredders and Shredder Kits.