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shredders and grinders

Below is Aaron's inventory of unused and used plastic grinders and granulators. If you are looking to sell your used grinders and granulator submit a request online or contact Erik Eichert at 630-238-7480

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used plastics grinders & plastics granulators

Used- Granutec Granulator, TFG121210. 3 Knife, open rotor. Driven by a 10 HP main drive, pull rolls driven by 3/4 HP motor. Includes 1.5 HP on blower. Screen size approximately 5/16" diameter. Serial# 196-2697.

Used Cumberland Model 18X37 Granulator. 18" X 37" Feed Throat. 5-Knife Steep Angle Step Adjustable Rotor Knives (10 Segments). 2- Bed Knives. Designed for Film Granulation. Belt Driven by a 100 HP, 460 Volt, 1780 RPM Motor. Gravity Discharge. 6" Diameter x 37" Wide Knurled and Grooved Offset Position Feed Roll Infeed with Pneum more info...

Used- Cumberland Granulator, Model 37. Approximate 18" x 37" feed opening with standard tray feed hopper. 3 Knife open rotor. Belt driven by an approximate 100hp motor. Serial# 50210-6616.

used plastics grinders & plastics granulators

Used- Hosokawa Alpine CL Series Granulator, Model 60/140 CL, Carbon Steel. Average throughput 3,300 pounds per hour depending on materials and parts. Approximate 23.6" (600mm) x 55.1" (1400mm) throat size. Top feed hopper, motor operated tilt. Approximate 23" diameter, 4-blade open rotor, (2) bed knives. Screen with 5/16" diamet more info...

Used- Irwin Chesaw Granulator; Model CH-LH 28.7-04. 5" x 33" Rotor Cutter, 15 hp, 208-230/460 volt, 1760 rpm, Fan Cooled 10:1 gearbox. Lincoln Auto-Lube System. Evacuated by a 4" Auger Discharge System. Approximate 3/8" Holes Screen. Mounted on Casters. Starter and Controls for Blower, Auger System and Siemens Micromaster 440 Va more info...

Used- Tria FN Series Granulator, Model 120-80 FN. Approximate 31.4" x 48.8" feed throat with a bolt on feed hopper. Approximate 27.5" diameter cutting circle with (5) rows of (2) bolt on 1-1/4" thick blades, open rotor, bottom discharge. Driven by an approximate 150 hp motor. Approximate 1" diameter screen holes, approximate 220 more info...

used plastics grinders & plastics granulators

Used- Cumberland Granulator, Model 50B-5KN. Throat Opening: 20" x 50". Infeed Hopper has 50" Wide Pull Rolls. Knives: Five Knife Steep Angle Rotor. Rotor: Belt Driven by Approximately 150 HP Motor. Includes Soft Start and Controls. Set up for Air-Veyor Discharge. Includes 10 HP Discharge Blower. Motor and Granulator are Unitized more info...

Used-Condux Model OS650/200III-A Granulator. 2 x 8" x 80" feed openings, 7 knife beam support rotor, (5) 15.5" segments each knife, tear type bed knives, 150 hp, 480 volt motor, hydraulically opened cutting chamber, 2 pc 1.5" holes screen, Airveyor discharge, film feed hopper, starter and controls not included. 1986 model year.

Used- Cumberland Model 3715h Hog Granulator. 18" x 37" Feed Throat, 15 Knife Hog Rotor, 2 bed knife. 150 hp, 460 volt, 1180 rpm motor. 84" x 72" x 53" base with 46" Gaylord clearance. 9.5" ID, 14" OD Flange Airveyor outlet. Needs assembly. Missing motor pecker head cover. Includes spare 3/8" and 1/8" perforated screens. Starter more info...

used plastics grinders & plastics granulators

Used- Heinrich Dreher GmbH & Co. KG Granulator, Model S 80/100 GFS. Capacity 2200-6600 pounds/hour. (1000-3000 Kg/hour) depending on the product. 31.2" (800 mm) diameter x 39" (1000 mm) straight side rotor. 15 Rotor- and 3 Bed knives. Belt driven by an 165 HP/ 110Kw-380volt/50cycle/3Ph AEG motor. Includes hopper, screen, cover, more info...

Used-Mitts & Merrill Hog Grinder, 300 hp, 15" x 27" feed opening, 18 knives. Discharge screen has .44" diameter holes. Equipped with outboard roller bearings. Motor 3/60/460V, 1180 rpm direct coupled. Size 6 motor starter and Square D disconnect.

Used- Cumberland, Model 2428I Granulator. 24" x 28" feed throat. 3 knife twin shear open rotor. 2 bed knife. 40 hp 230/460 volt motor. Tray feed hopper. 8" right hand airveyor discharge mounted on step base. Complete with starter and controls.

used plastics grinders & plastics granulators

Used- Rapid Granulator, Model R-36. Has a 40 HP motor and includes 23" wide pull rolls driven by a 5 HP motor. Granulator includes blower discharge. Serial# 430-66475, built 2005.

CUMBERLAND MODEL 20X72-5KN GRANULATOR, S/N 66300-91002, 20" X 72" FEED THROAT, 5 KNIFE STEEP ANGLE STEP ADJUSTABLE KNIFE ROTOR (10 SEGMENTS), 2 BED KNIFE, 2 AUXILIARY BED KNIVES, 1 TEAR BED KNIFE, DESIGNED FOR FILM GRANULATION AND FILM BLOW IN IN-FEED, DIRECTLY DRIVEN BY DUAL 200 HP 1190 RPM 460 VOLT ONLY MOTORS, 18" AIRVEYOR DI more info...

Used- AEC Nelmor AK Series Auger Fed Granulator, Model AK68. Carbon Steel. Approximate 7-1/2" wide x 6" diameter (3) bolt on blade open rotor. Approximate 6" diameter x 32" long screw feed with enclosed tube. Includes a feed hopper, bottom catch box, set up for blower discharge with a 1hp blower, approximate 5/16" diameter scree more info...

used plastics grinders & plastics granulators

Used- Herbold GmbH Granulator, Model SMS 45/60. Capacity 880-2640 pounds/hour. (400-1200 Kg/hour) depending on the product. 17.55" (450 mm) diameter x 23.4" (600 mm) straight side rotor. 5 Rotor- and 2 Bed knives. Belt driven by an 82.5 HP/ 55Kw-380volt/50cycle/3Ph Schorch motor. Includes hopper, screen, cover, and additional in more info...

Used- Tria Granulator, Type 80-49/DN-SL, Carbon Steel. Approximate 33" (840mm) x 19" (490mm) feed opening. Cutting capacity 400 to 800 kg/hour (880 to 1760 pounds per hour) depending on product. Approximate 17" (450mm) diameter 3-blade open rotor, requires knives, has (2) bed knives. Driven by a 66kw (99 hp), 3/60/440/760 volt, more info...

Used- Granutec Granulator, TFG121210. 3 Knife, open rotor. Driven by a 10 HP main drive, pull rolls driven by 3/4 HP motor. Includes 1.5 HP on blower. Screen size approximately 5/16" diameter. Serial# 196-2697

used plastics grinders & plastics granulators

Used Cumberland Model 18X37 Granulator. 18" X 37" Feed Throat. 5-Knife Steep Angle Step Adjustable Rotor Knives (10 Segments). 2- Bed Knives. Designed for Film Granulation. Belt Driven by a 100 HP, 460 Volt, 1780 RPM Motor. Gravity Discharge. 6" Diameter x 37" Wide Knurled and Grooved Offset Position Feed Roll Infeed with Pneumatic Pinch. Feed Roll Infeed Trumpet, Feed Rolls are Chain and Sprocket Driven by a 7.5 HP, 1750/1930 RPM Continuous Duty, DC Motor Thru a Reliance 2.76/1 Gearbox. All Mounted on Leg Base. Swing Out Chamber Door on Downstroke Side. Starter and Controls are not included

Used- Hosokawa Alpine CL Series Granulator, Model 60/140 CL, Carbon Steel. Average throughput 3,300 pounds per hour depending on materials and parts. Approximate 23.6" (600mm) x 55.1" (1400mm) throat size. Top feed hopper, motor operated tilt. Approximate 23" diameter, 4-blade open rotor, (2) bed knives. Screen with 5/16" diameter holes. Missing drive motor approximate 100/150 hp. Includes control panel. Mounted on a Carbon Steel frame. Includes extra cutting blades, (2) 1/4" diameter screens, (4) 1/2" diameter screens. Serial # R1128430K1

Used- Irwin Chesaw Granulator; Model CH-LH 28.7-04. 5" x 33" Rotor Cutter, 15 hp, 208-230/460 volt, 1760 rpm, Fan Cooled 10:1 gearbox. Lincoln Auto-Lube System. Evacuated by a 4" Auger Discharge System. Approximate 3/8" Holes Screen. Mounted on Casters. Starter and Controls for Blower, Auger System and Siemens Micromaster 440 Variable Speed Drive Unit for Granulator Rotor Speed. Also Includes 5 hp; 208-230/460 volt 3460 rpm Blower with Steel Impeller, OK100 (4") Outlet, Lab Test Machine

used plastics grinders & plastics granulators

Used- Tria FN Series Granulator, Model 120-80 FN. Approximate 31.4" x 48.8" feed throat with a bolt on feed hopper. Approximate 27.5" diameter cutting circle with (5) rows of (2) bolt on 1-1/4" thick blades, open rotor, bottom discharge. Driven by an approximate 150 hp motor. Approximate 1" diameter screen holes, approximate 2204-4409 pounds an hour throughput. Mounted on a base. Includes a 24" wide x 224" long belt conveyor, driven by a 2 hp, 3/60/208-230/460 volt, 1725 rpm gear motor. Serial # 8-1427-6

Used- Cumberland Granulator, Model 50B-5KN. Throat Opening: 20" x 50". Infeed Hopper has 50" Wide Pull Rolls. Knives: Five Knife Steep Angle Rotor. Rotor: Belt Driven by Approximately 150 HP Motor. Includes Soft Start and Controls. Set up for Air-Veyor Discharge. Includes 10 HP Discharge Blower. Motor and Granulator are Unitized on One Plate. Last Used on Film/Lamination Materials. Mfg. 1981

Used-Condux Model OS650/200III-A Granulator. 2 x 8" x 80" feed openings, 7 knife beam support rotor, (5) 15.5" segments each knife, tear type bed knives, 150 hp, 480 volt motor, hydraulically opened cutting chamber, 2 pc 1.5" holes screen, Airveyor discharge, film feed hopper, starter and controls not included. 1986 model year

used plastics grinders & plastics granulators

Used- Cumberland Model 3715h Hog Granulator. 18" x 37" Feed Throat, 15 Knife Hog Rotor, 2 bed knife. 150 hp, 460 volt, 1180 rpm motor. 84" x 72" x 53" base with 46" Gaylord clearance. 9.5" ID, 14" OD Flange Airveyor outlet. Needs assembly. Missing motor pecker head cover. Includes spare 3/8" and 1/8" perforated screens. Starter and controls not included

Used- Heinrich Dreher GmbH & Co. KG Granulator, Model S 80/100 GFS. Capacity 2200-6600 pounds/hour. (1000-3000 Kg/hour) depending on the product. 31.2" (800 mm) diameter x 39" (1000 mm) straight side rotor. 15 Rotor- and 3 Bed knives. Belt driven by an 165 HP/ 110Kw-380volt/50cycle/3Ph AEG motor. Includes hopper, screen, cover, piping, and additional infrastructure. New 1989. Previous used in a blown film and other related product application for recycling

Used-Mitts & Merrill Hog Grinder, 300 hp, 15" x 27" feed opening, 18 knives. Discharge screen has .44" diameter holes. Equipped with outboard roller bearings. Motor 3/60/460V, 1180 rpm direct coupled. Size 6 motor starter and Square D disconnect

used plastics grinders & plastics granulators

Used- Cumberland, Model 2428I Granulator. 24" x 28" feed throat. 3 knife twin shear open rotor. 2 bed knife. 40 hp 230/460 volt motor. Tray feed hopper. 8" right hand airveyor discharge mounted on step base. Complete with starter and controls

CUMBERLAND MODEL 20X72-5KN GRANULATOR, S/N 66300-91002, 20" X 72" FEED THROAT, 5 KNIFE STEEP ANGLE STEP ADJUSTABLE KNIFE ROTOR (10 SEGMENTS), 2 BED KNIFE, 2 AUXILIARY BED KNIVES, 1 TEAR BED KNIFE, DESIGNED FOR FILM GRANULATION AND FILM BLOW IN IN-FEED, DIRECTLY DRIVEN BY DUAL 200 HP 1190 RPM 460 VOLT ONLY MOTORS, 18" AIRVEYOR DISCHARGE, APPROXIMATELY 3/8" HOLES CLOSE FITTING SCREENS, DOES NOT INCLUDE STARTER/CONTROLS OR BLOW IN IN- FEED HOPPER, REBUILT IN 2004

Used- AEC Nelmor AK Series Auger Fed Granulator, Model AK68. Carbon Steel. Approximate 7-1/2" wide x 6" diameter (3) bolt on blade open rotor. Approximate 6" diameter x 32" long screw feed with enclosed tube. Includes a feed hopper, bottom catch box, set up for blower discharge with a 1hp blower, approximate 5/16" diameter screen, and controls. Screw driven by a 1hp gear motor, blades driven by a 5hp, 3/60/230/460 volt, 1755 rpm motor. Mounted on a cast carbon steel base with casters. Serial# 00E03908

used plastics grinders & plastics granulators

Used- Herbold GmbH Granulator, Model SMS 45/60. Capacity 880-2640 pounds/hour. (400-1200 Kg/hour) depending on the product. 17.55" (450 mm) diameter x 23.4" (600 mm) straight side rotor. 5 Rotor- and 2 Bed knives. Belt driven by an 82.5 HP/ 55Kw-380volt/50cycle/3Ph Schorch motor. Includes hopper, screen, cover, and additional infrastructure. Previous used in a blown film and other related product application for recycling

Used- Tria Granulator, Type 80-49/DN-SL, Carbon Steel. Approximate 33" (840mm) x 19" (490mm) feed opening. Cutting capacity 400 to 800 kg/hour (880 to 1760 pounds per hour) depending on product. Approximate 17" (450mm) diameter 3-blade open rotor, requires knives, has (2) bed knives. Driven by a 66kw (99 hp), 3/60/440/760 volt, 1780 rpm / 55 kw (82.5 hp), 3/50/400/690 volt, 1480 rpm motor. Approximate 1/2" (13mm) diameter screen holes. Includes sound enclosure and hopper. Serial # 33204175. Built 2004

Used- Granutec Granulator, TFG121210. 3 Knife, open rotor. Driven by a 10 HP main drive, pull rolls driven by 3/4 HP motor. Includes 1.5 HP on blower. Screen size approximately 5/16" diameter. Serial# 196-2697

used plastics grinders & plastics granulators

Used Cumberland Model 18X37 Granulator. 18" X 37" Feed Throat. 5-Knife Steep Angle Step Adjustable Rotor Knives (10 Segments). 2- Bed Knives. Designed for Film Granulation. Belt Driven by a 100 HP, 460 Volt, 1780 RPM Motor. Gravity Discharge. 6" Diameter x 37" Wide Knurled and Grooved Offset Position Feed Roll Infeed with Pneumatic Pinch. Feed Roll Infeed Trumpet, Feed Rolls are Chain and Sprocket Driven by a 7.5 HP, 1750/1930 RPM Continuous Duty, DC Motor Thru a Reliance 2.76/1 Gearbox. All Mounted on Leg Base. Swing Out Chamber Door on Downstroke Side. Starter and Controls are not included

Used- Hosokawa Alpine CL Series Granulator, Model 60/140 CL, Carbon Steel. Average throughput 3,300 pounds per hour depending on materials and parts. Approximate 23.6" (600mm) x 55.1" (1400mm) throat size. Top feed hopper, motor operated tilt. Approximate 23" diameter, 4-blade open rotor, (2) bed knives. Screen with 5/16" diameter holes. Missing drive motor approximate 100/150 hp. Includes control panel. Mounted on a Carbon Steel frame. Includes extra cutting blades, (2) 1/4" diameter screens, (4) 1/2" diameter screens. Serial # R1128430K1

Used- Irwin Chesaw Granulator; Model CH-LH 28.7-04. 5" x 33" Rotor Cutter, 15 hp, 208-230/460 volt, 1760 rpm, Fan Cooled 10:1 gearbox. Lincoln Auto-Lube System. Evacuated by a 4" Auger Discharge System. Approximate 3/8" Holes Screen. Mounted on Casters. Starter and Controls for Blower, Auger System and Siemens Micromaster 440 Variable Speed Drive Unit for Granulator Rotor Speed. Also Includes 5 hp; 208-230/460 volt 3460 rpm Blower with Steel Impeller, OK100 (4") Outlet, Lab Test Machine

used plastics grinders & plastics granulators

Used- Tria FN Series Granulator, Model 120-80 FN. Approximate 31.4" x 48.8" feed throat with a bolt on feed hopper. Approximate 27.5" diameter cutting circle with (5) rows of (2) bolt on 1-1/4" thick blades, open rotor, bottom discharge. Driven by an approximate 150 hp motor. Approximate 1" diameter screen holes, approximate 2204-4409 pounds an hour throughput. Mounted on a base. Includes a 24" wide x 224" long belt conveyor, driven by a 2 hp, 3/60/208-230/460 volt, 1725 rpm gear motor. Serial # 8-1427-6

Used- Cumberland Granulator, Model 50B-5KN. Throat Opening: 20" x 50". Infeed Hopper has 50" Wide Pull Rolls. Knives: Five Knife Steep Angle Rotor. Rotor: Belt Driven by Approximately 150 HP Motor. Includes Soft Start and Controls. Set up for Air-Veyor Discharge. Includes 10 HP Discharge Blower. Motor and Granulator are Unitized on One Plate. Last Used on Film/Lamination Materials. Mfg. 1981

Used-Condux Model OS650/200III-A Granulator. 2 x 8" x 80" feed openings, 7 knife beam support rotor, (5) 15.5" segments each knife, tear type bed knives, 150 hp, 480 volt motor, hydraulically opened cutting chamber, 2 pc 1.5" holes screen, Airveyor discharge, film feed hopper, starter and controls not included. 1986 model year

used plastics grinders & plastics granulators

Used- Cumberland Model 3715h Hog Granulator. 18" x 37" Feed Throat, 15 Knife Hog Rotor, 2 bed knife. 150 hp, 460 volt, 1180 rpm motor. 84" x 72" x 53" base with 46" Gaylord clearance. 9.5" ID, 14" OD Flange Airveyor outlet. Needs assembly. Missing motor pecker head cover. Includes spare 3/8" and 1/8" perforated screens. Starter and controls not included

Used- Heinrich Dreher GmbH & Co. KG Granulator, Model S 80/100 GFS. Capacity 2200-6600 pounds/hour. (1000-3000 Kg/hour) depending on the product. 31.2" (800 mm) diameter x 39" (1000 mm) straight side rotor. 15 Rotor- and 3 Bed knives. Belt driven by an 165 HP/ 110Kw-380volt/50cycle/3Ph AEG motor. Includes hopper, screen, cover, piping, and additional infrastructure. New 1989. Previous used in a blown film and other related product application for recycling

Used-Mitts & Merrill Hog Grinder, 300 hp, 15" x 27" feed opening, 18 knives. Discharge screen has .44" diameter holes. Equipped with outboard roller bearings. Motor 3/60/460V, 1180 rpm direct coupled. Size 6 motor starter and Square D disconnect

used plastics grinders & plastics granulators

Used- Cumberland, Model 2428I Granulator. 24" x 28" feed throat. 3 knife twin shear open rotor. 2 bed knife. 40 hp 230/460 volt motor. Tray feed hopper. 8" right hand airveyor discharge mounted on step base. Complete with starter and controls

CUMBERLAND MODEL 20X72-5KN GRANULATOR, S/N 66300-91002, 20" X 72" FEED THROAT, 5 KNIFE STEEP ANGLE STEP ADJUSTABLE KNIFE ROTOR (10 SEGMENTS), 2 BED KNIFE, 2 AUXILIARY BED KNIVES, 1 TEAR BED KNIFE, DESIGNED FOR FILM GRANULATION AND FILM BLOW IN IN-FEED, DIRECTLY DRIVEN BY DUAL 200 HP 1190 RPM 460 VOLT ONLY MOTORS, 18" AIRVEYOR DISCHARGE, APPROXIMATELY 3/8" HOLES CLOSE FITTING SCREENS, DOES NOT INCLUDE STARTER/CONTROLS OR BLOW IN IN- FEED HOPPER, REBUILT IN 2004

Used- AEC Nelmor AK Series Auger Fed Granulator, Model AK68. Carbon Steel. Approximate 7-1/2" wide x 6" diameter (3) bolt on blade open rotor. Approximate 6" diameter x 32" long screw feed with enclosed tube. Includes a feed hopper, bottom catch box, set up for blower discharge with a 1hp blower, approximate 5/16" diameter screen, and controls. Screw driven by a 1hp gear motor, blades driven by a 5hp, 3/60/230/460 volt, 1755 rpm motor. Mounted on a cast carbon steel base with casters. Serial# 00E03908

used plastics grinders & plastics granulators

Used- Herbold GmbH Granulator, Model SMS 45/60. Capacity 880-2640 pounds/hour. (400-1200 Kg/hour) depending on the product. 17.55" (450 mm) diameter x 23.4" (600 mm) straight side rotor. 5 Rotor- and 2 Bed knives. Belt driven by an 82.5 HP/ 55Kw-380volt/50cycle/3Ph Schorch motor. Includes hopper, screen, cover, and additional infrastructure. Previous used in a blown film and other related product application for recycling

Used- Tria Granulator, Type 80-49/DN-SL, Carbon Steel. Approximate 33" (840mm) x 19" (490mm) feed opening. Cutting capacity 400 to 800 kg/hour (880 to 1760 pounds per hour) depending on product. Approximate 17" (450mm) diameter 3-blade open rotor, requires knives, has (2) bed knives. Driven by a 66kw (99 hp), 3/60/440/760 volt, 1780 rpm / 55 kw (82.5 hp), 3/50/400/690 volt, 1480 rpm motor. Approximate 1/2" (13mm) diameter screen holes. Includes sound enclosure and hopper. Serial # 33204175. Built 2004

granutec – granulators & plastic grinders

At Granutec, we understand that each application is unique, and each client has a different need for special features built into their machines. We accommodate your needs by having a wide range of custom features.

Our service department is built on a flexible, helpful, and timely philosophy of response and action. We ship all stock parts the same day as they are ordered, and custom parts are available for special applications.

$50 plastic shredder / grinder / recycler : 11 steps (with

Everyone in the DIY community and especially those who work with 3D printers, have one issue - plastic junk. It can be failed prints, project scrap leftovers, or maybe you are just looking for a way to shred and recycle your plastic at home

There are many more links on youtube if you want to build a beast. Most of my plastic waste comes from failed prints and leftover strands of filament which I want to recycle into fresh filament using Filabot.

$50 plastic shredder / grinder / recycler : 11 steps (with

Time to hack a paper shredder to grind up my waste plastic. From the time the shredder arrived in the mail to putting together this instructable, the entire project has taken me 48 hours. If you follow all the instructions to the T, this is what you should be capable of grinding in about 24 hours-

STRIP CUT PAPER SHREDDERS WILL NOT WORK for this project (3 types of shredders). I already tried to bust open mine and replace the inner wheels with grooved washers and the like but its just not worth the effort.

We will be working with a CROSS CUT SHREDDER. If you have one already and don't mind busting it open, this instructable should work for you. If not, here is the only real expense involved in the project:

$50 plastic shredder / grinder / recycler : 11 steps (with

When I ordered mine new, it was <$50. There may be other economical options and I'm not Jeff Bezos, so go for it. Bear in mind, to chew and grind up plastic, we will need a pretty powerful motor and a gear drive train thats mostly metal or as little plastic as possible. This shredder seemed to have both so it worked for me.

Also, the CD shredding capability is completely useless for this project, so if you can find a powerful, economical/free one without it, thats perfect. We will be getting rid of the CD shredder completely.

First we need to test the shredder. Ignore this step if you are using the same shredder. The opening is too small for any part to fit through, so flip it over and run it in reverse. This step came in handy to realize that if the bottom grooved carriage allows for parts to go through, it might be worth keeping intact (which is a nightmare later during hacking). If it barely grinds even the smallest of parts, make note that it is expendable and move on

$50 plastic shredder / grinder / recycler : 11 steps (with

For lack of a better term, let's call this "hack". The IR sensors and microswitch under the flap are vestigial and can be harvested for use in other projects. The IR sensor and receiver can be directly cut off the board. The flap microswitch can be cut off and the wire spliced with the alignment microswitch. Look at pictures. Test your circuit

This part gets a bit tricky. The objective is to get rid of the top plastic cover over the rotors. Go though the dismantling process methodically and avoid using unnecessary brute force. This is the longest and most tedious part of the build and I apologize for the lack of pictures. But if you are at this stage with grease smeared hands, you will understand why

You will end up unscrewing the end cover, the screws holding the plastic covers together and the screws holding the steel rods in place. I had to unscrew 3 of the 4 steel rods in order to get the covers off

$50 plastic shredder / grinder / recycler : 11 steps (with

Once the two plastic covers are off, you have a choice to get rid of both or just the top. I suggest keeping the bottom to add rigidity and since it barely interfered with reverse grinding(Step 1), why not? The pictures make it seem like you should take both off. I changed my mind later and decided to dismantle again to add the bottom plastic cover. So you can skip that unnecessary step

One piece of advice, don't work on a glass table like I did. This assembly is pretty heavy and the with the number of times it dropped on my table top during dismantling (the copious amounts of grease didn't help), its a miracle it didn't shatter

For this part, I used my handy jigsaw with the thinnest blade I could find. Remember to cut off the plastic flap on the bottom back edge. Use the pictures as a reference. Make sure your grinding rotors are completely exposed. Test fit once done

$50 plastic shredder / grinder / recycler : 11 steps (with

Get creative with your hoppers. I was originally going to print one but something of this size would take hours to design and print. I decided to go with an inverted conical hopper, to minimize the amount of plastic being spit out. I had a sheet of 3mm polypropylene lying around so I used it to cut the shapes

Assemble like in the pictures and test fit for snugness. Blue painter's tape is what I had handy (thank you ABS printing). Make sure that both the long edges go around the steel rods and touch the lower plastic cover which we added back. Essentially make sure that the plastic bits flying around during operation don't make their way out of the grind chamber to the motor, gears and electronics

Time to start putting things back together. Screw in the electronics and clean up the wiring like the pictures. Close up, put in the 6 original screws and mount on bin. Load the hopper. I had an extra piece of PP which I decided to use as a lid. We are almost done

$50 plastic shredder / grinder / recycler : 11 steps (with

There is one and only one golden rule to this operation. Short slow pulses. If it sounds like the motor is being strained; stop and pulse in reverse once, flip back to forward and start pulsing again. I will eventually work on a hack to reduce motor speed drastically in order to eliminate pulsing all together. But for now, monitored pulsing has its advantages

1st Grind Quality- The grind varies from dust to long strips and ribbons. This is characteristic of 3D printed parts as entire layers get delaminated. Keep in mind I have been running this continuously and ground up about 1kg of black ABS parts. The only breaks have been when the motor overheats

2nd Grind Quality- Drastic improvement in consistency but some big chunks still remain. Easy to sort out by hand. Heat is starting to become a huge issue. Friction = heat. Not only does the motor overheat, the real big issue I am noticing is that the rotors have heated up. Also, the undercarriage has taken a bit of a beating, some of the rotor teeth are misaligned. Now the heat issue while not a big deal for plastics like ABS(high glass transition temp), might be a huge issue for PLA(low g-t). Cooling the motor is easy, its the rotors that have me concerned

$50 plastic shredder / grinder / recycler : 11 steps (with

3rd Grind Quality- Ground the bigger pieces twice and smaller pieces once. Product is relatively consistent. At least to the point that the filabot extruder screw will spit out bigger chunks. Check out the pictures.

Total product 840gms. Assuming we began with 1kg, thats a yield of 0.84. I'm looking around and all the spillage barely amounts to 100gms. There is definitely a lot of debris in the shell. Most of the real damage seems limited to the plastic undercarriage shell that we left in place. Considering that most of the plastic on this machine is ABS and we ground up ABS, contamination isn't an issue

1) Physical: The huge downside of this hack is that we are using a single set of rotors which imposes massive strain on the drive train. Also, the grinds need to be reground a couple of times to ensure semi-uniform consistency.

$50 plastic shredder / grinder / recycler : 11 steps (with

2) Heat is a monster. An immediate upgrade is a computer fan for the motor. Will post more later. The rotors need a bit more thought. Liquid cooling poses the risk of leaks. Fans will just generate dust and require filters which is a perpetual consumable and fire hazard. This is the plate and fin cooling problem from transport phenomena, but reversed

Don't grind up huge batches at a go but rather grind as you go along and store for later use. My honest opinion is if you intend to grind about 1kg batches at a go, perhaps you need 2 - 3 of these machines running simultaneously. For an outlay of $150 for 3 machines producing 1kg a day and a profit margin of $5 per kg of product, the machines pay themselves off in 30 days. If you intend to go bigger, then you are in the recycling business and the $1000< beast is for you

1) A small 3-stage plastic grinder comprising of 2 rotor top stage of about double the diameter of this shredder, 4 rotor 2nd stage like the one we are using, 8 rotor 3rd stage of half the diameter. In fact that gear ratio would be a great starting point with load sensitive speed control speed control rather than the "clicky" end-stop switch. There are some coffee grinders that use this concept

$50 plastic shredder / grinder / recycler : 11 steps (with

Essentially we need a device transformation like from http://www.thingiverse.com/thing:902826 to http://www.ebay.com/itm/NEJE-1000mW-DIY-Laser-USB-.... Having built the first one, I decided to buy the second one

If you are reading this, I'm assuming you either liked / thought about / want / intend to build or intend to contribute 'USEFULLY' to this idea. I will be posting upgrades and observations as I go along. If you have any suggestions / feedback / comments / build schematics / upgrades / mods or anything 'USEFUL' to contribute please message me. Use youtube comments as a benchmark for 'USEFULNESS"

In the process of making one of my own, I found a small 'cheat' of sorts. Because of how I cut the blade-guides (I took a dremel cutoff disk and dropped it between the blades, slicing the plastic spacer in half) I was able to keep part of the internal shield. As I am not shredding anything more than 15mm thick, I chose to only cut one side, so it forces the plastic into the other side, and I have had very little scatter into the housing even without a hopper guard.I find that running it at a 15% duty cycle is good enough for it to stay cool on the blades

$50 plastic shredder / grinder / recycler : 11 steps (with

I'm quite interested in this project. Do you think a 2.2HP woodchipper could be used as the initial rotor assembly? I found one on Amazon for about $150, and I've heard of them being used to shred plastic. Issue with that is that the total cost comes to $200—again, not inexpensive, particularly when coupled with a Recyclebot

There are older shredders that can eat 3-ring binders! But, paper shredders are designed to shred paper. Maybe a "blender" could shred your plastics small enough to - then use a crosscut shredder. Your savings in; time, money, and electrical usage, will be reduced considerably. OR 3-4 shredders of varyin shred size & power, and reduce your plastic in "stages" vs burning up shredders

Sorry, this project has been put on the backburner for a while but I will be posting big updates sometime in December. Just a quick update - I have successfully shredded most household plastics and produced fresh filament with quite decent print quality. PLA has been the only plastic with some issues because of its hardness. What really piques my curiosity is a powder extruder which eliminates the filament spool altogether. I have hated the filament and spool concept since my first 3D print over 5 years ago. Hopefully the DIY community starts work in earnest on a hybrid of the filament extruder and print hotend using ptfe tubing in bowden configuration to lighten the x-carriage and eliminate the ridiculous filament and spool.

$50 plastic shredder / grinder / recycler : 11 steps (with

Thanks for this instructable! I had no idea cross-cut shredders existed until I came across this instructable. I'very purchased a shredder and will work on transforming it in the next couple of weeks.great instructable!

Great plastics shredder! I've been doing some research into recycling plastics into 3D printer filament, but I haven't found a grinder that works for me. Could you do me a favor? If you could please run a clear, recyclable water bottle made of PET (#1 recycling symbol) and record it? I'd love to see the results, because this is probably better than freezing the plastics in Liquid Nitrogen :)

I have stripped the machine and looking into some immediate performance upgrades. The plan right after is to grind kitchen plastics like PP(tupperware, milk and juice jugs), PET(soda and water bottles) and others like pe, ldpe, hdpe. I have tried the liquid nitrogen technique and its a lot of fun but definitely not a smart idea at home. But its just so much fun. All the home plastics will definitely need to be washed, dried and cut into smaller chunks first. Smaller crushable pet bottles should be simple to grind. I'll post some updated videos shortly

$50 plastic shredder / grinder / recycler : 11 steps (with

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