Home › Blog › Buying Guide › From Inspection to Installation: What to Verify Before Buying a Pre-Owned, Used, Secondhand, Surplus Klingelnberg Höfler P40 Gear Measuring Machine made in Germany If you’re considering acquiring a pre-owned or second-hand “P 40” (or P 40-series) gear measuring machine from Klingelnberg/Höfler, from inspection through to installation, you’ll want a thorough check-list....