Hydraulic Expanding Mandrel, Collet, Arbour. Rotary Clamping Technology. CONCENTRIC Mandrel & arbor. we are happy to introduce our newest addition to the range of high quality hydraulic tool holders –CONCENTRIC holders. with the combination of extreme high precision and easy handling and tool change a massive improvement in productivity can be reached. Quicker set-up times and improved repeat accuracy during sharpening of tools will save you time and money. The possibility to use reduction sleeves in the hydraulic holder also increases your flexibility. Benefits & features: - • High run-out accuracy ≤ 0, 004 mm. • easy handling and tool change. • High clamping force. • Vibration dampening. • flexibility in clamping range