Six Core Points to Pick Suitable Guillotine Blades
1. Confirm the raw material being cut
This is the most critical step. The cut stock’s category, thickness and physical traits directly decide blade material and design requirements.
Cut Material | Core Features | Blade Selection Tips |
Paper & cardboard | Contains abrasive mineral filler and dense fiber | General production uses quenched high-speed steel blades. Recycled abrasive paper works best with carbide inlaid cutters; higher initial purchase cost gets offset by far longer service life over long run. |
Soft metal (aluminum, copper etc.) | Soft texture, prone to surface scratch adhesion | Standard high-speed steel remains the most practical mainstream option. |
Hard steel & stainless steel | High tensile strength, fast blade abrasion | Solid carbide tops the list for wear resistance; cost-efficient alternatives include D2, Cr12MoV, H13 and 6CrW2Si alloy tool steel. |
Plastic, thin film & foil | Flexible, easy to tear or melt under cutting heat | Carbide tipped blades deliver neat cuts and less leftover scrap. Custom tooth or serrated cutting edges apply to tough stock or dotted line perforation. |
2. Select proper blade grade and hardness
Each blade material balances edge hardness for wear resistance and core toughness to avoid edge chipping.
Blade Material | Material Traits | Hardness Range & Application Scenarios |
High speed steel (HSS) | Balanced hardness and impact resistance | 58–64 HRC. Widely used for paper, cardboard, aluminum and regular plastic cutting. |
Alloy tool steel (D2, Cr12MoV, H13, SKD-11) | High carbon-chromium formula for outstanding abrasion resistance | 50–62 HRC. Budget-friendly pick for medium hard steel and stainless steel processing. |
Solid / inlaid carbide | Extreme surface hardness with weaker shock resistance | 65–72 HRC. Preferred for super hard metal and heavily abrasive feedstock including recycled paper and thick composite sheets, with longest usable cycle. |
3. Check cutting angle and edge shape
Fine-tuned blade angles match shear machine structure to guarantee stable, smooth cutting.
Bevel cutting angle: Common production range sits 15° to 25°. Steeper angles cut faster yet wear quicker; smaller angles keep edge intact longer for soft raw stock.
Rake angle: Controls blade face tilt against workpiece. Larger rake reduces cutting resistance for thick sheets but risks material deformation; smaller rake yields tidy cut surfaces while needing extra cutting power.
Edge profile: Straight edge for clean full cuts; serrated tooth edge for perforation or dense tough stock cutting.
4. Verify matching with existing shear equipment
Perfect blade performance counts on full machine compatibility.
Dimension matching: Blade length, thickness and mounting hole layout must fully conform to guillotine specs; non-standard equipment supports customized blade sizing.
Installation clearance: Proper gap fixed between upper and lower blades directly improves cutting finish and slows premature wear.
Equipment type difference: Swing arm shear and regular guillotine use separate blade holders, confirm blade model fits your machine design before purchase.
5. Calculate production load and long-run spending
Heavy daily high-volume cutting: Go for carbide or premium D2/Cr12MoV tool steel. Less frequent regrinding cuts machine downtime and recurring production cost.
Occasional low-output cutting: Standard HSS blades balance upfront price and basic cutting performance perfectly.
Full lifecycle cost control: Premium grade blades cost more at checkout, yet extended service lifespan lowers total operating expense long term.
6. Arrange routine maintenance to extend service cycle
Blades deliver full value with regular upkeep.
Timely regrinding: All cutting edges wear down over operation. High-frequency production needs at least one professional regrind per year; choose qualified processors to restore original cutting angle precision.
Replace timing: Swap out blades once edges chip irreparably, fail sharpening recovery, require excessive cutting pressure or leave burrs and rough cuts on finished parts.
Service upgrade option: Vacuum heat treatment stabilizes blade hardness; TiN or PVD surface coating adds anti-friction wear layer to further stretch usable life.
Share your actual cutting material and guillotine model, I can give targeted blade selection suggestions.