Machine Category · Shredders
Single Shaft Plastic Shredder Machines
When the scrap is too hard, too thick or too big for anything else (plastic lumps, purgings, FRP boards, thick-walled rejects) a single shaft shredder is the machine that eats it. The S3 line runs from the compact S3-600 to the S3-1000: three machines on the same single shaft cutting principle, from 300 to 800 kg/hr.
What is a single shaft shredder and how does it work?
A single shaft shredder has one slow-turning rotor fitted with multiple cutting blades that shear material against fixed counter-blades in the chamber wall. Across our S3 line, that means a rotor turning at 60 to 80 rpm and carrying 26 to 42 hardened rotary blades against 2 fixed blades, with a hydraulic pusher pressing the material onto it. The slow speed produces high cutting force with less heat, noise and dust than high-speed machines, which is exactly what hard, thick plastic needs.
- Load the hopper Bulky scrap goes in whole, through a 600 x 1000 mm side feeding hopper on the S3-600 or an 1800 x 1600 mm opening on the S3-800 and S3-1000
- Rotor engages A hydraulic pusher presses material onto the rotor, turning at 60 to 80 rpm with high torque
- Shear cutting 26 to 42 rotary blades shear the material against 2 fixed blades, slicing thick sections cleanly
- Sized discharge Cut pieces pass the screen where one is fitted and discharge for recycling. Pair with an RE-series grinder for fine, uniform regrind
Single shaft shredder design and blades
The rotor sets the design. The S3-600 has a 280 mm welded rotor turning at 80 rpm with 26 welded roto-type blades. The S3-800 and S3-1000 have a 400 mm solid rotor at 60 rpm, carrying 33 and 42 square-type blades of 50 x 50 x 30 mm in DC53 tool steel. Every model cuts against 2 fixed blades, and the blades are hardened to HRC 55–60 on the S3-600 and HRC 56–58 on the larger two. On the S3-600, automatic start/stop and reverse sensing guards against overloading and jamming. On the S3-800 and S3-1000, the hydraulic pusher self-regulates feed pressure.
Choosing a shredder: single shaft, dual shaft or grinder
| Single Shaft Shredder | Dual Shaft Shredder | Grinder / Granulator | |
|---|---|---|---|
| Cutting action | One slow rotor shears material against fixed blades, pares dense mass pass by pass | Two counter-rotating shafts grip, pull in and tear material apart | High-speed rotor knives cut against fixed knives and a screen |
| Best feed | Hard, thick, solid pieces, lumps, purgings, FRP boards, thick-walled rejects | Bulky hollow or flexible waste, drums, crates, bottles, bags, film | Lighter, cleaner scrap, bottles, sprues, runners, thin-wall parts |
| Output | Coarse, consistent shred for grinding or recycling | Rough torn strips and pieces | Uniform granules sized by the screen (12–15 mm standard) |
| Our machines | S3-600, S3-800 and S3-1000 (300–800 kg/hr) | Dual shaft range | RE8–RE40 with CB blower variants (14 models) |
Rule of thumb: if a solid piece has no edge for dual-shaft blades to grip (a purge lump, a dead-head, a thick FRP board) it belongs on the single shaft. If it is hollow, flexible or comes by the tonne, a double shaft shredder suits it better. If it already fits a grinder throat and you want uniform regrind, go straight to the grinders & granulators. Our guide, single shaft vs double shaft shredder, compares the two in more depth.
The S3 Line: Three Models
Every S3 machine uses the same principle: one slow rotor, hardened blades against fixed bed blades, and a hydraulic pusher keeping the material on the rotor. The models step up in chamber size, blade count and drive. The S3-600 is the compact entry point with a side feeding hopper and takes the widest mix of materials. The S3-800 and S3-1000 are built for high volumes of rigid engineering plastics. All three single shaft shredders are for sale across India, each quoted to your material and volume.
S3-600 Single Shaft Shredder
- 300–500 kg/hr, material-dependent
- 30 HP / 22.07 kW, 415 V · 80 rpm rotor
- 600 x 1000 mm side feeding hopper · 26 + 2 blades
- 650 x 600 mm chamber · 40 mm screen · 2,300 kg
Best for: plastic lumps and purgings, FRP sheets and boards, rotomoulding rejects, plus wood, pallets and bulk paper.
S3-800 Single Shaft Shredder
- 400–600 kg/hr
- 55 kW / 74.8 HP, 380 V · 60 rpm rotor
- 1800 x 1600 mm feed opening · 33 + 2 DC53 blades
- 800 x 800 mm chamber · screen optional · 4,500 kg
Best for: rigid engineering plastics such as ABS, PC and PA, in high volume, where a more compact machine will do.
S3-1000 Single Shaft Shredder
- 600–800 kg/hr
- 75 kW / 102 HP, 380 V · 60 rpm rotor
- 1800 x 1600 mm feed opening · 42 + 2 DC53 blades
- 1000 x 1000 mm chamber · 80 mm screen · 5,500 kg
Best for: the highest volumes of rigid engineering plastics such as ABS, PC and PA, with sized output from the screen.
S3 Range Specifications Compared
| Specification | S3-600 | S3-800 | S3-1000 |
|---|---|---|---|
| Production capacity | 300–500 kg/hr (material-dependent) | 400–600 kg/hr | 600–800 kg/hr |
| Feed opening | 600 x 1000 mm, side feeding hopper | 1800 x 1600 mm | 1800 x 1600 mm |
| Cutting chamber | 650 x 600 mm (L x W) | 800 x 800 mm | 1000 x 1000 mm |
| Rotor diameter | 280 mm | 400 mm | 400 mm |
| Rotor speed | 80 rpm | 60 rpm | 60 rpm |
| Rotary blades | 26, welded roto-type | 33, 50 x 50 x 30 mm square-type, DC53 tool steel | 42, 50 x 50 x 30 mm square-type, DC53 tool steel |
| Fixed blades | 2 | 2 | 2 |
| Blade hardness | HRC 55–60 | HRC 56–58 | HRC 56–58 |
| Screen | 40 mm hole size, 10 mm mesh plate thickness | Not fitted as standard (optional accessory) | 80 mm perforated, interchangeable |
| Motor | 30 HP / 22.07 kW, 415 V / 50 Hz / 3-phase | 55 kW / 74.8 HP, 380 V / 50 Hz / 3-phase | 75 kW / 102 HP, 380 V / 50 Hz / 3-phase |
| Motor protection | TP44 (thermal protection) | IP45 | IP45 |
| Noise level | Less than 75 dB | Not specified | Not specified |
| Control | Siemens PLC, Schneider contactor/relay, proximity switch protection | Siemens PLC, Schneider contactor/relay, proximity switch overload interlock | Siemens PLC, Schneider contactor/relay, proximity switch overload interlock |
| Oil pump motor | 2.2 kW | 3 kW | 5.5 kW |
| Max. system pressure | 10 MPa | 10 MPa | 10 MPa |
| Cylinder diameter | 60 mm | 80 mm | 100 mm |
| Pusher stroke | 600 mm | 800 mm | 1000 mm |
| Chamber wall thickness | 20 mm | 25 mm (Q235B structural steel) | 30 mm (Q235B structural steel) |
| Machine weight (approx.) | 2,300 kg | 4,500 kg | 5,500 kg |
Capacity varies with the material, its bulk density and the feed rate. Specifications are subject to change for continuous product development.
Single Shaft Shredder Applications and Industries
Single shaft shredders earn their place where plastic arrives thick, solid and hard to grip. Injection moulding plants bring purgings, dead-heads and start-up lumps, the job of a plastic lumps shredder machine. Extrusion plants shred purge lumps and off-spec pipe before an extrusion scrap grinder, and pipe makers bring rigid PVC pipes, profiles and fittings to a PVC pipe shredder. FRP fabricators feed sheets, panels, bars and boards to an FRP shredder, and rotomoulders feed reject water tanks ahead of a rotomoulding scrap grinder. Bumpers, dashboards, trims and battery casings go to an automobile plastic shredder line, and recyclers of rigid engineering plastics such as ABS, PC and PA run the S3-800 or S3-1000 at volume.
When a single shaft is the right call
- Purgings, dead-heads and start-up lumps from injection and extrusion machines
- FRP sheets, decorative panels, bars and boards, abrasive composite duty
- Thick-walled rejects: rotomoulded tanks, pipes, profiles
- Rigid engineering plastics such as ABS, PC and PA in high volume, on the S3-800 or S3-1000
- Mixed tough waste, one S3-600 across lumps, FRP, pallets and paper
- Two-stage lines: an S3 shreds, an RE-series grinder finishes to regrind
The material goes in as it comes off the line or out of the store, as whole lumps, boards and thick-walled parts, and leaves as a coarse, consistent shred for grinding or recycling. Not sure your scrap suits a single shaft? Send us a description or a sample and we will tell you which machine fits: single shaft, dual shaft or a grinder.
Not sure a single shaft shredder fits your scrap?
Talk to our technical team for a free recommendation based on your material, volume and output size, or run a trial with your own scrap.
Single shaft shredder FAQs
What are the key differences between single-shaft and dual-shaft shredders?
A single shaft shredder has one slow rotor whose blades shear material against fixed blades, with a hydraulic pusher pressing the feed onto the rotor and, where one is fitted, a screen setting the first cut, so the shred is coarse but consistent. A dual shaft shredder has two counter-rotating shafts of cutters that grip, pull in and tear material apart, usually without a screen, so the shred is uneven. Choose single shaft for hard, thick or solid scrap such as lumps, purgings, FRP boards, pipes and thick-walled parts. Choose dual shaft when volume and mixed waste matter more than output consistency: bottles, film, bags and assorted scrap feed faster between two shafts.
Which S3 model is right for my material?
Start with the material and the volume. The S3-600 shreds plastic lumps, FRP sheets and boards, wood and bulk paper at 300–500 kg/hr, fed whole through a 600 x 1000 mm side feeding hopper. The S3-800 and S3-1000 are built for rigid engineering plastics such as ABS, PC and PA, with an 1800 x 1600 mm feed opening and 400–600 or 600–800 kg/hr. The comparison table sets every specification side by side.
What output size does a single shaft shredder produce?
Shredders produce coarse, irregular pieces, the job is volume reduction, not fine granulation. On the S3 line the screen sets the first cut: 40 mm on the S3-600, an interchangeable 80 mm screen on the S3-1000, and an optional screen on the S3-800. If your recycler or your own molding line needs uniform granules, run the shredded output through an RE-series plastic grinder, where the screen (12–15 mm standard, or as you require) fixes the final granule size. The shredder-plus-grinder pair is the standard setup for lumps-to-regrind lines.
How much does a single shaft shredder machine cost in India?
Every machine is quoted to the job. The price depends on the model and its capacity, the motor, the material you shred, options such as the screen on the S3-800, and the feeding and discharge your line needs. Our guide to what drives machine cost walks through each of those. Send us your material and daily volume and we will size the machine and quote it.
Who are some manufacturers of single-shaft shredder machines in India?
Several Indian companies build or supply single shaft shredders. Raj Electricals is one: a manufacturer since 1985 with more than 2,100 machines supplied, offering three single shaft models, the S3-600, S3-800 and S3-1000, with every specification published on this page. Whoever you consider, compare the full specification sheets and ask for a trial on your own material before you decide.
What maintenance does a single shaft shredder need?
Mainly blade care and lubrication. S3 blades are hardened, to HRC 55–60 on the S3-600 and in DC53 tool steel at HRC 56–58 on the S3-800 and S3-1000. Keeping the cutting head properly oiled extends blade life and keeps the machine running smoother and quieter. Avoid overloading and keep metal objects out of the feed. We provide on-site installation and maintenance service across India.
Can I trial the machine with my own material before purchase?
Yes, and for single shaft machines we strongly recommend it, because capacity varies with material density. Courier or bring your lumps or FRP scrap to us and we will run it on the S3-600 so you can verify throughput and output size before you commit. Contact us via the enquiry form to schedule a trial.
Get a Free Quote for a Single Shaft Shredder
Tell us what you shred (lumps, FRP, wood or a mix) plus monthly volume and target output size. Our technical team replies with the right S3 model, its configuration and an exact quote.
- Phone: +91 98700 12462
- WhatsApp: Chat with us
- Email: rajelectricalsmumbai@gmail.com
- Address: 102/103/104, Madhu Industrial Estate, Old Nagardas Road, Mogra Lane, Andheri East, Mumbai – 400069
- Hours: 9:00 AM – 6:00 PM, all seven days
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