In machining operations, particularly face milling and large-area machining, the equipment that clamps face mills and keyed cutting tools rigidly and precisely to the machine is known as Shell Mill Arbors (Face Mill Holders).
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Key Features and Benefits
- Rigidity and High Precision: With ground taper and pilot sections, the cutting tool seats on the machine rigidly and with virtually zero runout. This makes it easy to achieve the required tolerances and a high surface finish in face milling [01:50].
- Through-Coolant Support: A coolant channel runs through the centre of the arbor. By delivering coolant directly to the cutting edge, it improves chip evacuation and extends insert life [02:37].
- Versatile Use (Modularity): They are used not only for conventional face mills but also for clamping other keyed cutters such as angular milling cutters, slitting saws and gear hobs [01:31], [03:47].
- Range of Lengths and Tapers: In addition to CNC machining centre tapers such as BT30, BT40, BT50 and HSK-63, versions are available for universal milling machines and lathe driven tools [00:13]. Short, medium and long versions are available [03:04].
Points to Consider in Use and Length Selection
- Choosing the Right Length: In face milling operations, always choose the shortest possible arbor to prevent deflection and vibration (chatter) [03:13]. Long arbors should only be used where deep cavities must be reached [03:22].
- Assembly: After the drive keys are seated in their slots, the face mill is mounted on the pilot and the central locking screw is fully tightened to torque using an Allen key [04:38].