Crop Shears
Assembly and precision machining
- Core Equipment
Crop Shears.
Whole or part.
Whole or part.
Complete crop shear assemblies. Drum assemblies. Blades and holders. Drive trains. Engineered for hot strip lines, plate mills, and continuous casters where cut timing and tonnage matter.
- Our Approach
A shear is an assembly problem. We've been solving them since 1961.
Mull Group has been assembling mill equipment for over 60 years. Crop shears are among the most assembly-intensive components on a modern hot strip line — drum carriers, blade holders, drive shafts, couplings, and housings all working together under shock load. We’ve worked on assemblies from 2 pieces to over 100.
We build complete new shear assemblies from print, and we machine and supply the individual components — blades, blade holders, drum assemblies, drive trains — when you only need one part of the larger unit. Either way, the tolerance stack-up is managed in-house.
- Three Ways We Deliver
Build the whole shear. Build any part.
Rebuild what's worn.
01
Complete Assemblies
Full crop shear assemblies — drum, carriers, holders, blades, drive train, and housing — built, aligned, tested, and shipped.
- Engineered to print or reverse-engineered
- Tolerance stack managed in-house
- Full assembly traveler documentation
- Bench-tested before shipment
02
Sub-Components
Individual blades, holders, drums, and drive parts — when you only need a specific piece of the larger shear.
- Blades and blade holders
- Drum assemblies and carriers
- Drive shafts and couplings
- Housings and support structures
03
Rebuild & Refurb
Teardown, inspection, component replacement or re-machining, reassembly, and test — restore to OEM tolerance or better.
- Drum OD and journal restoration
- Housing crack-check and rework
- Blade seat and holder reconditioning
- Complete reassembly and documentation
- Specifications
What we can handle. And then some.
Shear TypesCrop · Drum · Rotary · Flying
ApplicationsHot Strip · Cold Mill · Finishing Mill
Max Assembly Weight100,000 lb
Drum Diameter RangeUp to 72 in
Blade MaterialsD2, A2, high-alloy tool steel
Structural Materials4140, 4340, cast iron
DocumentationFull assembly traveler
TestBench-aligned before ship
- Types We Work On
Every cut. Every line.
Crop Shears
Head and tail crop for hot strip and plate.
Rotary Shears
Continuous rotary cutting for processing lines.
Flying Shears
On-the-fly cutting for bar, rod, and strip lines.
Drum Assemblies
Rotating shear drums with blade seats.
Blade Holders
Precision-machined blade mounting hardware.
Drive Trains
Input shafts, couplings, and gear-to-drum links.
Housings
Structural frames and bearing support housings.
Custom Assemblies
Engineered-to-order complete shear systems.
