27 Innovations

Republic Machine is the Leading
Technological Manufacturer of
Single Shaft Shredders in North America.

Republic was the first to offer a number of reliability enhancing features to the
product. We stake our reputation on these design improvements, and fledge to
continue to listen and to add engineered innovations to the product line.

1. First use of external pillow block (rock crusher) type bearings
2. First use of forged alloy / heat treated rotor with “stress free” mechanical design
3. Grooved screen (patented) for self cleaning & high production
4. Monorail ram travel (patented) low friction design with linear bearings mounted free from product contamination
5. Heavy torque arm design for large machines which combined to provide easy belt tensioning without aligning belts
6. First use of “8V” style Kevlar belts on 150HP and higher machines – requires no belt tensioning & eliminates jumping or slipping belts
7. Control logic which controls ram motion based on both ram force as well as main motor load
8. Control system which also controls Ram motion & physical position based on ram velocity, ram force, and main motor amperage
9. First use of tandem hydraulic pumps to provide two speed ram motion with constant RPM motor versus use of 2 speed electric motor
10. Hydraulic system valve switching reliably controlled by a PLC versus use of unreliable siphon actuated controls
11. Developed first absolutely NON-WRAPPING rotor Zoidal cutting system
12. Developed flat counter knife which is indexable providing multiple cutting surfaces
13. Developed first modular shredder split-a-part shredder – 72” and smaller machines can be shipped without wide load restrictions and upon delivery the 2 modules can be moved into tight spaces – split-a-part feature enables easy machine cleanout and direct maintenance access to essential components
14. Developed first universal power frame where rotor, bearings, and counterknife can be readily changed for different applications
15. Developed first anvil with precision doweling for counterknives enabling easy replacement without realignment
16.  Electric soft start or variable frequency rotor motor control
17. Beltless drive system – utilizing right angle gearbox
18. Torque limiting clutch between motor and gearbox providing absolute over torque protection for gearbox
19. Self cleaning non-contaminating rotor seals
20. Programmable ram velocity control with continuously variable speed hydraulics
21. Multi-cutting screens providing true granulator performance from single shaft shredder
22. Complete stainless steel machines with hardened stainless steel rotors for special applications
23. Removable cleanout tray for machine cleanout when splitting apart modular machine
24. Cutter seat between cutter and holder for impact protection
25. Ram position input provided by single range finding sensor
26. Water cooled rotor and anvil option combined
27. Quick change ram wipers for fast cleanout in minutes
28. Quick change hydraulic cylinders (easy removable forward clevis pins)

Innovative Solutions at Work