Product Catalog
Industrial Blades by Category
6 product families covering the most common industrial cutting applications. All items are manufactured in-house and available with custom geometry, material and tolerance. Last reviewed 2026-09-01.
By the Numbers
KAIPU has engineered industrial blades in-house since 1998. 8 standard SKUs are currently published across 6 product families.
Why Buyers Come to Us
Six Problems Our Customers Were Trying to Solve
If any of these sound familiar, you are in the right place. Every KAIPU order is engineering-led, not a SKU match.
Premature edge failure
Catalog blades wearing out in days, not weeks. The wear pattern is usually diagnostic — material, hardness or geometry is wrong for the substrate.
OEM lead time too long
Maintenance windows measured in hours, not weeks. We hold buffer stock on common OD sizes and ship non-stock items in 15–25 working days.
Obsolete or vendor-locked parts
Original blade is no longer available, or the OEM has minimum-order quantities you cannot meet. Reverse-engineering from your worn sample closes the gap.
Inconsistent dimensional quality
Flatness, parallelism and concentricity drifting batch-to-batch. Every dimension you specify is CMM-checked, not just the ones that fit the schedule.
Unclear quotations
Quotes that hide tooling, setup or coating as extras. Our quotes list material grade, hardness, tolerance, lead time and tooling cost on the same page.
No engineering support
A supplier that just ships a SKU. Every KAIPU order has a named engineer — from RFQ review through to the dispatch paperwork.
Categories
6 Blade Families
Click into a category to see standard SKUs, or send us a drawing for a custom build.
Material Selection
Material and Tolerance at a Glance
Six grades cover ~95% of industrial cutting applications. Pick a row that matches your substrate, line speed and tolerance requirement — or send us your drawing and we will specify the grade against your process. Our quotation uses the Material-to-Tolerance Scorecard to align material, hardness and dimensional tolerance in one decision.
| Material | Designation | Hardness | Governing Standards | Typical Use |
|---|---|---|---|---|
| D2 | AISI D2 / 1.2379 / SKD11 | HRC 58–62 | AMS 6478 · ASTM A681 · ISO 4957 | Cold-work tool steel. Default grade for paper, film and foil slitting; balanced wear resistance and toughness. |
| M2 HSS | AISI M2 / 1.3343 / SKH51 | HRC 60–64 | ASTM A600 · ISO 4957 | High-speed steel for hot edges and abrasive feedstock — granulator rotors, high-speed slitting. |
| SKD11 | JIS SKD11 / DC53 | HRC 58–62 | JIS G4404 · ISO 4957 | Refined cold-work steel. First choice for thin-gauge slitting below 1 mm — reduces chipping risk. |
| H13 | AISI H13 / 1.2344 / SKD61 | HRC 50–54 | ASTM A681 · ISO 4957 | Hot-work tool steel. Used where shear heat builds up — high-speed guillotines and abrasive plate cutting. |
| 6CrW2Si | Chinese GB 6CrW2Si | HRC 54–58 | GB/T 1299 | Shock-resistant grade for swing-beam shears cutting thicker mild-steel and stainless plate. |
| Tungsten Carbide | WC-Co (K10/K20) | HRA 89–92 | ISO 513 | Solid or tipped carbide for the most abrasive feedstocks — typically 8–10× the edge life of HSS. |
In-House Capabilities
What Lives Behind the Quote
Every step of the manufacturing chain — design, tool-room, heat treatment, grinding, PVD coating and quality lab — is under one roof. You deal with one engineering team end-to-end.
Design office
SolidWorks, AutoCAD and Mastercam. Engineers fluent in CAD-to-CAM, including direct import of customer STEP / IGES / DXF files.
Tool-room
CNC milling, turning and wire EDM. Fixtures built in-house to hold tight tolerances without grinding vibration.
Heat treatment
Two vacuum furnaces (12 and 30 bar quench) plus a cryogenic treatment cell. Hardness calibrated daily against a certified test block.
Grinding hall
Five-axis CNC profile grinders, surface grinders and cylindrical grinders. Coolant filtration keeps thermal growth under control.
PVD coating
Two PVD chambers (TiN / TiCN / CrN / DLC). Coating thickness measured on a Calotest rig and recorded in the batch file.
Quality lab
CMM, optical comparator, surface roughness tester, micro-hardness tester. Reports archived for ten years per ISO 9001.
Order Process
How to Order a Custom Industrial Blade
Send your drawing or sample
A 2D / 3D drawing (STEP / IGES / DXF) or a worn sample is the fastest path to a firm quote.
Engineering review
We confirm material grade, hardness, dimensional tolerance and quantity within one business day.
Written quotation
Material, hardness, tolerance, lead time and tooling cost — all on one page, no hidden extras.
Drawing approval
For custom parts we issue a 2D / 3D drawing for your written sign-off before any steel is ordered.
Manufacture
CNC roughing, vacuum heat treatment, CNC grinding, optional PVD coating — every step calibrated.
Inspection and dispatch
CMM dimensional report, hardness record and surface finish shipped with the parts.
Comparison
KAIPU vs Catalog-Only Suppliers
Seven criteria that distinguish an engineering-led manufacturer from a SKU drop-shipper. Source for every KAIPU line is our ISO 9001 quality manual and our batch paperwork.
| Criterion | KAIPU | Catalog-only |
|---|---|---|
| Material certificate with every batch | Mill certificate included | On request, often extra |
| Hardness verified per batch | Rockwell tested, recorded | Heat-treater sub-contracted |
| CMM dimensional report | Every specified dimension | Spot-check only |
| Custom geometry from drawing | In-house design office | Referral to a third party |
| Reverse-engineering from worn sample | CMM measurement + 2D/3D drawing approval | Not offered |
| Engineering contact for the order | Named engineer, end-to-end | Sales rep only |
| Lead-time honesty | Quoted lead time = delivered lead time | Best-case lead time quoted |
Match the Family to the Application
Which Blade Family Is Right for Your Application
One sentence per family, written so you can quote it directly in an internal email or RFQ.
BEST FOR centre-surface and centreless winders, slitter-rewinders for label stock, and tape / foil / paper sheeters running film and laminate under 1 mm thick.
BEST FOR pouch-making and label-stock converting lines, top-anvil slitting, and adhesive-tape cut-to-length where straightness and edge parallelism drive cut quality.
BEST FOR tear-strip perforation on shrink film and lidding foil, easy-open packaging, and decorative cuts on laminated paper products (6–32 TPI selectable).
BEST FOR guillotine and swing-beam cutting of mild and stainless plate up to 12 mm, scrap shear rotors, and high-cycle service centres running more than eight shifts per week.
BEST FOR plastics granulators cutting filled, glass-fibre reinforced or recycled feedstock — rotor / stator matched sets, bevel re-grindable four times.
BEST FOR obsolete parts, vendor-locked geometries, and second-source qualification — reverse-engineered from your worn sample or STEP / IGES / DXF drawing.
Procurement and Engineering
Frequently Asked Questions
Eight questions our engineering team hears most often. If your question is not here, send it to engineering and we will reply within one business day.
Which blade material should I choose — D2, SKD11 or M2 HSS?
D2 (1.2379) is the default grade for paper, film and foil slitting at ambient temperature. SKD11 / DC53 is the first choice for thin gauges under 1 mm because its refined carbide distribution reduces chipping. M2 HSS (1.3343) is the right pick when the edge runs hot — granulators, high-speed slitting, or abrasive recycled feedstock. Send us your substrate, line speed and current blade life and we will recommend a grade on the quotation.
What tolerances can you hold on a custom blade?
Standard CNC grinding holds ±0.01 mm on flatness and parallelism, ±0.02 mm on concentricity and surface finish to Ra 0.2–0.4 µm. Tighter tolerances (down to ±0.002 mm) are available on request with a quoted lead-time impact. Every dimension you specify is CMM-checked and the report ships with the parts.
What is the typical lead time for a non-stock blade?
Stocked OD sizes ship in 10 working days. Custom non-stock items follow our 8-step process and ship in 20–25 working days from drawing approval. Reverse-engineered parts add 5–10 working days for the CMM measurement and drawing-approval stage. Lead times we quote are the lead times we deliver against — we tell you on the day we know if anything slips.
Do you offer reverse-engineering from a worn sample?
Yes. Send us the worn blade, a 3D scan, or a STEP / IGES / DXF file. We CMM-measure the critical features, reconstruct the original geometry, and propose a material and hardness upgrade where the wear pattern allows. A 2D / 3D drawing is issued for your written approval before any steel is ordered.
Which PVD coating should I specify — TiN, TiCN, CrN or DLC?
TiN is the general-purpose choice for wear resistance. TiCN suits thin film and paper where lower friction matters. CrN is used for corrosive or food-contact applications. DLC (diamond-like carbon) is the lowest-friction option for sticky or adhesive substrates. Coating thickness is held to ±2 µm uniformity and adhesion is verified per VDI 3198 on every batch.
Can you match an OEM part if I do not have a drawing?
Yes — that is the reverse-engineering workflow. We CMM-measure your worn part (or your spare), recover the original geometry, and either reproduce it exactly or upgrade it based on the wear pattern. The replacement is shipped with a 2D / 3D drawing of the recovered geometry for your records.
What is the minimum order quantity for a custom blade?
For a one-off custom blade the minimum order quantity is one piece. Tooling and setup are amortised into the unit price for low-volume runs. For ongoing consumption we typically schedule a quarterly batch (e.g. 20–50 pieces) so you receive a lower unit price and a predictable dispatch cadence.
How quickly will I receive an engineering quotation?
Within one business day of receiving your drawing, sample or written specification. The quote lists material grade, hardness, dimensional tolerance, lead time and tooling cost (if any) on the same page — there are no hidden extras. PPAP / ISIR documentation can be included on request for automotive and medical customers.
Quality and Risk Mitigation
Risk Reduction, Built into Every Order
Every batch carries a paper trail. Every dimension is CMM-checked. Every hardness is recorded. Here is what we do to keep risk on our side of the table.
Material traceability
Steel arrives with a mill certificate. We never blend grades and never substitute without written approval.
In-house heat treatment
Two vacuum furnaces and a cryogenic cell. Distortion is minimised through controlled quench rates; hardness is mapped on every batch.
CMM inspection
Every dimension you specify is checked on a coordinate measuring machine. Reports are shipped with the parts.
PVD coating adhesion
Coating adhesion is verified per VDI 3198 on every coated batch. Thickness is held to ±2 µm uniformity.
PPAP and ISIR documentation
Available on request for automotive and medical customers. Includes initial sample, dimensional and material reports.
ISO 9001 since 2003
Quality system audited annually by an accredited certification body. Documentation archive retained for ten years.
Capacity and Lead Time
120,000 Parts a Year — and the Schedule Behind It
If you can plan against it, we can hold capacity for it. Here is how we schedule custom work alongside stocked SKUs.
Buffer stock on common sizes
Stocked OD sizes on circular and straight blades ship in 10 working days. We hold material for the most common diameters and thicknesses.
Quarterly batch scheduling
Recurring customers run on a quarterly cadence (e.g. 20–50 pieces / quarter). Capacity is reserved at the order-confirmation step.
Annual capacity
120,000 parts per year across the six families. Capacity is reviewed monthly against the order book.
Dispatch and logistics
Export crating, FOB / CIF / DAP terms arranged by our shipping team. Typical European lead time 4–6 weeks by sea; air-freight on request.
Standards We Work To
Governing Standards and References
Material grades, heat treatment and coating adhesion are not opinions — they are anchored to international standards. Each link below opens the issuing body's official page.
Page last reviewed on 2026-09-01. Specifications on this page are typical for the product families; final dimensions, tolerances and hardness are confirmed in the engineering quotation. Contact us for a drawing or a quote against your specific application.
Don't see your part in the catalog?
Most of our work is custom. Send a drawing, a worn sample, or a written specification and our engineering team will quote against your application rather than against a SKU.