LAMBERT WAHLI W 91 is a Hobbing machine of high precision, engineered for very accurate and reliable gear cutting. Capacities: module 0.05–1.5 mm, centre distance 40 mm, max workpiece Ø 50 mm, max cutting length 60 mm, teeth 6–390, head swivel ±5°, max cutter Ø 32 mm, cutter travel 16 mm. Specs: cutter speeds stepless up to 4500 rpm, workpiece spindle 500 rpm, supply 50 Hz 3×400 V, total power 4 kVA, weight ≈680 kg, dimensions 720×765×1445 mm. Achieves tight tolerances; typical sectors: automotive, watchmaking, machine tools, aerospace, medical.