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FESTOOL SC 3/8"-91 IH-57E ISO Hard Saw Chain for IS 330

FESTOOL SC 3/8"-91 IH-57E ISO Hard Saw Chain for IS 330
FESTOOL SC 3/8"-91 IH-57E ISO Hard Saw Chain for IS 330
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  • Stock: In Stock
  • Model: FES769090
  • Weight: 0.20kg
  • Dimensions: 85.00mm x 20.00mm x 120.00mm
  • SKU: FES769090
  • UPC: 4014549205853
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R 3,698.40
Ex VAT: R 3,216.00
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Festool SC 3/8"-91 IH-57E ISO Hard Saw Chain

At a Glance: Robust 3/8" ISO Hard chain for cutting extremely pressure-resistant insulation materials up to 330 mm thick.

The Festool SC 3/8"-91 IH-57E is a specialised ISO Hard saw chain developed for the Festool IS 330 and ISP 330 sword saws. Designed specifically for very hard and pressure-resistant insulation materials, it delivers dependable cutting performance in rigid wood-fibre insulation boards, PUR/PIR hard foam, polystyrene panels, hard rock wool and dense glass wool. The chain is suitable for materials with a bulk density exceeding 150 kg/m³ and supports cuts up to 330 mm deep when used with the compatible sword saw. Installation and tension adjustment are completed without tools through the machine&s integrated system, while the cutting teeth can be resharpened several times with a 4 mm round file. It is an excellent professional replacement chain for roof insulation, facade work and demanding renovation projects.

ISO Hard performance for dense insulation materials

Unlike a general-purpose chain, the SC 3/8"-91 IH-57E is engineered specifically for extremely pressure-resistant insulation. Its robust tooth profile and 30° cutting angle provide efficient material penetration while maintaining the accuracy required for professional insulation installation.

Product highlights

  • Purpose-built ISO Hard chain: Designed specifically for cutting exceptionally dense and pressure-resistant insulation materials.
  • 3/8" chain pitch: Matches the approved Festool IS 330 and ISP 330 cutting system.
  • Up to 330 mm cutting capacity: Supports the full-depth insulation cutting capability of the compatible sword saw.
  • Tool-free installation: Fits into the sword saw without requiring separate installation tools.
  • Tool-free tensioning: Chain tension can be adjusted conveniently through the machine&s tensioning system.
  • Multiple resharpenings: The cutting teeth can be sharpened repeatedly using a 4 mm round file.
  • Professional insulation applications: Ideal for roofing, facade insulation and building renovation projects.

Extra Information

  • Compatible exclusively with the specified Festool IS 330 and ISP 330 sword saw systems.
  • This ISO Hard chain is intended for dense insulation materials and is not a general-purpose timber-cutting chain.
  • Use only with the correct Festool guide bar, drive sprocket and approved chain-lubrication system.
  • The chain can be resharpened using a suitable 4 mm round file while maintaining the original tooth geometry.
  • Correct chain tension and adequate lubrication are essential for safe operation, clean cutting and maximum chain life.
  • Replace the chain if it is cracked, stretched beyond adjustment, damaged or unable to retain a suitable cutting edge.

Pro Tips

  • Check the chain tension before every cutting session and again after the chain has warmed during initial use.
  • Ensure that the chain lubrication reservoir contains the approved chain oil before starting work.
  • Allow the saw and chain to cut at a steady natural rate; excessive feed pressure creates heat and accelerates wear.
  • Sharpen all cutting teeth evenly to preserve balanced operation and straight cutting performance.
  • Clean compacted insulation fibres from the guide bar groove and chain area after use.
  • Use a Festool guide rail where appropriate to produce long, straight and accurately positioned cuts.
  • Store the cleaned and lightly lubricated chain in a dry container to protect the cutting teeth from corrosion and impact damage.

How to Use

  • Confirm that the material is suitable for the ISO Hard chain and that the chain is compatible with the saw and guide bar.
  • Disconnect the sword saw from its power source before installing, removing or adjusting the chain.
  • Inspect the guide bar, drive sprocket and chain for wear, damage or contamination.
  • Install the chain in the correct cutting direction around the guide bar and drive sprocket.
  • Use the saw&s tool-free mechanism to set the chain tension according to the machine instructions.
  • Fill or check the chain-lubrication system and confirm that oil reaches the chain correctly.
  • Secure the insulation material and mark or guide the required cutting line.
  • Start the saw away from the material and allow the chain to reach operating speed before beginning the cut.
  • Guide the saw smoothly through the material without twisting the guide bar or applying excessive pressure.
  • After use, disconnect the machine, allow the chain to cool and clean the chain and guide bar before storage.

Features

  • ISO Hard chain design: Optimised for extremely firm and pressure-resistant insulating materials.
  • 30° tooth angle: Provides the cutting geometry required for effective insulation processing.
  • 3/8" chain pitch: Designed to match the compatible Festool guide bar and drive system.
  • Reusable cutting teeth: Can be resharpened several times using a suitable 4 mm round file.
  • Tool-free chain change: Allows fast replacement directly on the IS 330 or ISP 330 sword saw.
  • Tool-free tension adjustment: Makes correct chain setup quicker and more convenient.
  • Specialist insulation performance: Suitable for rigid materials with a bulk density above 150 kg/m³.

Benefits

  • Efficient cutting in dense materials: The specialist tooth design tackles insulation that is too firm for standard insulation-cutting accessories.
  • Reduced accessory downtime: Tool-free fitting and tension adjustment make chain changes and setup faster.
  • Extended usable life: Repeated resharpening restores cutting performance and maximises the value of the chain.
  • Accurate insulation preparation: The compatible Festool sword saw system supports controlled cuts in thick insulation boards.
  • Reliable system compatibility: Designed specifically for the Festool IS 330 and ISP 330 machines and their approved guide-bar system.

Application

  • Cutting pressure-resistant wood-fibre insulation boards.
  • Processing PUR and PIR rigid polyurethane foam panels.
  • Cutting polystyrene insulation boards.
  • Cutting hard rock wool and dense glass wool.
  • Preparing roof and above-rafter insulation.
  • Installing facade insulation systems.
  • Fitting thick insulation boards.
  • Roof renovation and building refurbishment.

Safety

  • Wear suitable eye, hearing, respiratory, hand and foot protection during cutting operations.
  • Disconnect the sword saw from its power source before fitting, adjusting, sharpening or cleaning the chain.
  • Inspect the chain, guide bar and drive sprocket before every use and do not operate worn or damaged components.
  • Ensure that the chain is installed in the correct direction and tensioned according to the saw instructions.
  • Never operate the chain without adequate approved chain lubrication.
  • Secure the workpiece and maintain a firm two-handed grip on the sword saw throughout the cut.
  • Keep hands, clothing, cables and bystanders away from the chain and projected cutting path.
  • Be alert to kickback, chain pinch and guide-bar deflection, particularly when beginning or completing a cut.
  • Insulation dust and fibres may be harmful; use effective extraction where supported and wear suitable respiratory protection.
  • Allow the chain to stop completely before placing the saw down or inspecting the cutting system.

Specifications

Description Spec
BrandFestool
Cat No.FES769090
Product TypeSword Saw Chain
Product DesignationSC 3/8"-91 IH-57E
Festool Order No.769090
Chain TypeISO Hard
Chain Pitch3/8"
Tooth Angle30°
Sharpening File4 mm Round File
Maximum Material Thickness330 mm
Material DensityAbove 150 kg/m³
InstallationTool-Free
Tension AdjustmentTool-Free
Suitable MaterialsRigid Wood-Fibre Insulation, PUR/PIR, Polystyrene, Hard Rock Wool and Dense Glass Wool
Compatible MachinesIS 330 and ISP 330
Pack Quantity1 Piece

Scope of Delivery:

  • 1 x Festool SC 3/8"-91 IH-57E ISO Hard saw chain
Tags: FES769090 , SC 3/8"-91 IH-57E , ISO Hard , Saw Chain , Sword Saw Chain , 3/8 Inch Chain , IS 330 Accessory , ISP 330 Accessory , Rigid Insulation , PUR PIR Insulation , Polystyrene Insulation , Wood Fibre Insulation , Rock Wool , Glass Wool , Roof Insulation , Facade Insulation
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