Pneumatic Knife Holder

Quick-change pneumatic knife holder for paper, film, cloth, foam, and non-woven cutting.

Factory direct sale
Uniform hardness
A sharp knife edge
Ensure the quality

Customized sizes are available, according to your drawing or sample.

Fully Custom
Expedited Production Processing

The YISHI pneumatic knife holder is an air-actuated tool assembly designed for longitudinal slitting and cross-cutting of flexible web materials in automated production lines. It accommodates standard and custom round blades with outer diameters typically ranging from 60 mm to 200 mm and bore sizes matched to the holder arbor. The integrated pneumatic piston provides consistent, operator-independent clamping force, enabling rapid blade changes without manual tightening. Constructed from alloy steel with precision-ground mounting surfaces, the holder maintains a blade runout tolerance of ±0.01 mm. It is specified by maintenance teams and process engineers for converting machines, packaging lines, and textile cutting systems where repeatable blade positioning and reduced downtime are critical.

Air-Actuated Clamping Mechanism
A single-action pneumatic circuit locks and releases the blade. Typical operating pressure ranges from 0.4 to 0.8 MPa, eliminating torque-wrench dependency and reducing blade change time to under 30 seconds.
Precision-Ground Arbor and Flange
Holder body and blade-mating surfaces are ground to a flatness of ±0.01 mm. This controls lateral runout and ensures a clean, burr-free cut on materials as thin as 10 microns.
Multi-Grade Blade Compatibility
Accepts round slitting blades in 9CrSi, SKD-11, D2, HSS, M2, 440B, and 420J. Hardness options span HRC 56 to HRC 62, selected based on material abrasiveness and desired edge life.
Modular Mounting Interface
Holder shank diameters and lengths are configurable to fit OEM slitter shafts from manufacturers such as Kampf, Goebel, and Atlas, or custom machine frames. Common shank diameters include 20 mm, 25 mm, and 30 mm.
Hardened Wear Components
Piston rods and guide bushings are induction-hardened to HRC 58–60. Seals are specified in nitrile or fluorocarbon rubber for compatibility with standard pneumatic oils.

Take a Closer Look

Paper and Label Converting
Flexible Packaging Film
Nonwoven and Textile Processing
Aluminum Foil and Laminates

Paper and Label Converting
Installed on duplex slitter rewinders to slit thermal paper, release liners, and adhesive labels. The pneumatic holder maintains constant lateral pressure, preventing adhesive build-up on the blade edge.
Flexible Packaging Film
Used in blown-film and cast-film lines for in-line edge trim and center slitting of LDPE, BOPP, and PET films. The quick-change feature supports frequent width changeovers in short-run production.
Nonwoven and Textile Processing
Deployed on cross-cutting stations for spunbond and meltblown fabrics. The holder's rigid design resists deflection when cutting high-loft materials at line speeds up to 300 m/min.
Aluminum Foil and Laminates
Specified for slitting thin-gauge aluminum foil and multi-layer laminates. Blade holders are configured with reduced internal clearances to prevent foil wrinkling at the cut point.

Technical Parameters

Product name	Pneumatic Knife Holder
Scope of application	Paper/film/tape/plastic/paper tube/food/metallurgy/clothes
Material	9Crsi/SKD-11/D2/HSS/M2/440B/420J
Hardness (HRC）	56/60/61/60/62/58/58
Precision （Fatness)	±0.01
Package	Plastic Bag+Foam+Carton Box

Technical Specifications

Dimensions	Blade OD range: 60–200 mm; bore: per arbor spec (typically 20–50 mm); holder shank diameter: 20, 25, 30 mm (custom available); overall length: per machine requirement.
Materials	Holder body: 40Cr alloy steel; blade options: 9CrSi, SKD-11, D2, HSS, M2, 440B, 420J; seals: NBR or FKM.
Hardness	Blade: HRC 56–62 (grade-dependent); holder wear surfaces: HRC 58–60.
Tolerances	Blade axial runout: ±0.01 mm; bore tolerance: H7; surface flatness: ±0.01 mm.
Surface Finish	Ground contact surfaces: Ra 0.8 μm; holder body: black oxide or electroless nickel plating for corrosion resistance.
Customisation	Buyers can specify shank dimensions, blade bore, overall length, pneumatic port thread type, and submit a drawing or OEM part number for dimensional matching.

Why Choose Yishi

YISHI manufactures pneumatic knife holders in-house, controlling the grinding of arbors and the fitting of pneumatic assemblies under one quality system. Every holder is assembled with matched-grade blades from our own heat-treatment line, ensuring hardness uniformity within ±1 HRC across a batch. We maintain a library of OEM interface drawings for common slitter rewinders, allowing us to ship a drop-in replacement without requiring machine modifications. Orders are fulfilled with a dimensional inspection report and a dynamic runout test certificate. Standard holders ship in 7–10 working days; custom-engineered units in 15–20 days.

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Frequently Asked Questions

What blade types are compatible with this pneumatic knife holder?

The holder accepts round slitting blades with a flat or dished profile. Common steel grades include D2 (HRC 60–62) for abrasive films, HSS M2 (HRC 62) for high-temperature applications, and 9CrSi (HRC 56–60) for general-purpose paper slitting. Blade bore and thickness must match the holder arbor and clamping flange. We can supply the holder pre-fitted with blades or as a bare tool.
What air pressure is required to operate the holder?

Typical operating pressure is 0.4 to 0.8 MPa (4–8 bar). The clamping force generated is proportional to the piston area and line pressure. We recommend a filtered and lubricated air supply with a 5-micron particulate filter. For dry cutting environments, oil-free air can be used with FKM seals.
Can this holder be retrofitted to an existing slitting machine?

Yes. Provide the existing shaft diameter, keyway dimensions, and the distance from the shaft centerline to the material plane. We will machine the holder shank and set the blade projection to match. For common OEM machines, we often have interface drawings on file and can confirm fitment before production.
What is the typical lead time for a custom-sized holder?

Standard-dimension holders ship within 7–10 working days. Custom holders requiring non-standard shank diameters, special blade bores, or unique overall lengths typically ship in 15–20 working days. Expedited processing is available for urgent replacement orders.
How do I specify the correct blade hardness for my material?

Material thickness, abrasiveness, and line speed determine the optimal hardness. For thin, non-abrasive films (BOPP, PE), HRC 56–58 provides adequate edge life with easier re-sharpening. For abrasive materials like carbon-fiber prepreg or metalized films, HRC 60–62 in D2 or HSS is recommended to maximize intervals between blade changes. Our application engineers can recommend a grade based on your process parameters.