Home › Blog › Buying Guide › How Smart Engineers Assess a Pre-Owned, Used, Second-Hand, Surplus Heller HF-500 CNC 5 Axis Horizontal Machining Center with Pallet made in Germany Before Purchase Here’s a detailed pre-purchase assessment guide for a used or surplus HELLER HF-series (e.g., HF-500 or HF-5500) 5-Axis Horizontal Machining Centre with pallet changer — essentially a machine with high capability made in Germany....