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

Specifications

• 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