Klingelnberg P 65 Precision Measuring Center

The Klingelnberg P 65 is a Precision Measuring Center — gear metrology equipment rather than a gear cutting machine. It is the large-capacity member of the P-series measuring line, taking cylindrical gears up to 650 mm clamping and testing diameter between centers, at modules from 0.30 to 35 mm (0.20 mm in the extended range), with 50–1,000 mm between centers and 1,500 mm in the extended configuration.

What separates the P 65 from the smaller instruments in the family is load capacity rather than accuracy. Both are specified to the same limits, but the P 65 accepts workpieces to 500 kg with a maximum moment of inertia of 100 kgm². Moment of inertia, not weight alone, is what governs how quickly a rotary axis can accelerate a large-diameter gear without compromising positioning, which is why it is published as a hard limit. Measuring intervals run to ±200 mm horizontally in X and 800 mm vertically in Z, extending to 1,200 mm.

Accuracy is classified Group A to VDI/VDE 2612 sheet 6. In an 18–22 °C environment the length measurement error limit is MPE_E0 = 1.8 µm + L/450 mm to ISO 10360-2:2010, with rotary axis roundness of 0.3 µm (Ø 100/L) and total axial runout of 1.5 µm to VDI/VDE 2617 sheet 8. A second published set covers 15–35 °C at MPE_E0 = 1.8 µm + L/250 mm, 0.5 µm roundness, and 1.8 µm total axial runout, so the instrument holds a stated specification across a 20-degree ambient spread rather than only in a controlled room.

Installation is undemanding for a machine of this envelope: 2.3 kVA rated power including the printer and 6 bar at 1 l/min of compressed air, with no coolant, chip conveyor, or filtration plant. The machine weighs approximately 4,050 kg net including standard equipment on a footprint of roughly 2,220 x 2,140 mm, standing 2,430 mm high or 2,930 mm in the taller configuration.

In a gear plant the P 65 is the reference point that upstream production is corrected against. It quantifies flank, pitch, and runout deviation on large gears after cutting, heat treatment, and grinding, releases first articles, and generates the correction data that goes back to the producing machines. Because it can accept 500 kg parts, it removes the usual constraint on large-gear inspection — that the part is too heavy for the instrument and has to be certified by sampling or on a general-purpose CMM without gear-specific evaluation.