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M8 x 25 mm DIN 912 / ISO 4762 socket head cap screw that secures rotor knife holders to the rotor drum in Virtus Equipment and ZERMA America ZCS 600, ZCS 1400, ZRS 800, ZRS 1000, ZRS 1500, and ZRS 2000 shredders. Grade 12.9. Always replace when knife holders are removed. High quantities required per machine — confirm from machine documentation. Sold individually.
The Knife Holder Fixing Bolt DIN 912 M8 x 25 12.9 is a socket head cap screw conforming to DIN 912 / ISO 4762 that secures the rotor knife holders to the rotor drum across a wide range of Virtus Equipment and ZERMA America shredder models. The ZCS and ZRS series shredders use a flat E-type rotor with machined pockets that hold the rotor knife holders, and the knife holders in turn grip and retain the square rotor knives. These cap head bolts clamp the knife holders firmly into the rotor pockets, preventing movement under the high-impact and high-shear forces of shredder operation. This bolt is specified for use with the new-style rotor knife holder (80051077) across the ZCS and ZRS series. High quantities are required per machine — preventive maintenance kit reference quantities are ZCS 1400: 68, ZRS 800: 120, ZRS 1000: 162, ZRS 1500: 272, ZRS 2000: 528. Confirm the total quantity for your specific machine configuration from your factory parts documentation. These bolts must be replaced whenever the rotor knife holders are removed for knife rotation or replacement — re-using previously torqued grade 12.9 cap head bolts risks fastener fatigue failure. Grade 12.9 construction provides 1,220 N/mm² minimum tensile strength. Sold individually.
| Weight | 0.5 lbs |
|---|---|
| Dimensions | 1.25 × 0.5 × 0.5 in |
SKU: 80011090
Standard: DIN 912 / ISO 4762
Thread Size: M8 x 1.25 mm (coarse pitch)
Length: 25 mm
Head Type: Socket Head Cap Screw (cap head)
Hex Key Size: 6 mm
Property Class: 12.9
Tensile Strength: 1,220 N/mm² minimum
Compatible Knife Holder: New-style rotor knife holder (80051077)
PM Kit Reference Quantities: ZCS 1400: 68 | ZRS 800: 120 | ZRS 1000: 162 | ZRS 1500: 272 | ZRS 2000: 528
Sold As: Individual bolt
Grade 12.9 High-Strength Construction: Provides 1,220 N/mm² minimum tensile strength in a compact M8 package -- required to resist the high-shear and impact forces acting on the rotor knife holders during shredder operation.
Replace at Every Knife Service: These bolts must be replaced whenever the rotor knife holders are removed for knife rotation or replacement. Re-using previously torqued grade 12.9 fasteners risks fatigue failure under operating loads.
DIN 912 / ISO 4762 Socket Head Cap Screw: Internal 6 mm hex (Allen) drive with low-profile cylindrical head allows installation in the rotor pocket positions with compact tooling access.
Compatible with New-Style Knife Holder: Specified for use with the new-style rotor knife holder (80051077) across all ZCS and ZRS series machines.
Secures rotor knife holders to the rotor drum in ZCS and ZRS series shredders. Must be replaced every time the rotor knife holders are removed for knife rotation or replacement. Consult your machine’s parts documentation to confirm the total quantity required for your specific machine configuration.
Compatible Machines: Virtus Equipment and ZERMA America ZCS 600, ZCS 1400 Shredder Granulator Combinations; ZRS 800, ZRS 1000, ZRS 1500, ZRS 2000 Pipe and Profile Shredders
Compatible Knife Holder: New-Style Rotor Knife Holder (SKU 80051077)
