Mandrels are internal forming tools used in aerospace manufacturing to support, shape or maintain the geometry of hollow or tubular components during fabrication processes such as filament winding, resin transfer moulding (RTM), autoclave cure, tube bending and metal spinning, and are produced from materials including aluminium alloy, steel, soluble plaster, eutectic salts and composite layup-compatible elastomers.
How many distinct aircraft programmes each supplier in this area is linked to in our database — a proxy for how widely established a company is across the industry. Bars are relative to the top-ranked supplier.
Whether supply here is concentrated in a few big players or spread across many. Top-5 share is the portion of all programme links held by the five largest suppliers. HHI (Herfindahl–Hirschman Index) runs 0–10,000: under ~1,500 is competitive, over ~2,500 is concentrated.
Where the listed suppliers in this area are based, by country of head office. Useful for sourcing, near-shoring and understanding regional strengths.