Handtmann PBT 160

Commercial aircraft wing spars for narrow-body aircraft like the A320 and 737 range from approximately 12 to 20 meters in full length, but wing spar sections that are individually machined and then joined are typically 4 to 8 meters per section. An 8-meter machine accommodates these individual spar sections in a single setup, maintaining datum control across the full section length. Fastener hole patterns along a spar must be positioned within tight tolerances relative to each other and to the spar's datum — repositioning introduces the datum transfer errors that multi-meter spar machining without an adequate working envelope would require.

The PBT 160 uses synchronized dual-drive gantry axes with precision linear encoders providing position feedback at both sides of the gantry bridge, ensuring consistent drive force and position across the full 8-meter travel. Handtmann applies thermal compensation through temperature sensors and machine-body correction algorithms in the Siemens Sinumerik 840D sl control. The machine is leveled and calibrated at installation with volumetric accuracy measurement across the full working envelope to verify conformance to specification at all positions.

Cycle times on the PBT 160 vary enormously by part complexity, aluminum buy-to-fly ratio, and machining strategy. A typical commercial aircraft wing rib — complex multi-pocket structure with thin webs — might run 4 to 20+ hours depending on size and complexity. A wing spar section, which is a simpler but longer structure, might run 6 to 24+ hours for a full roughing and finishing sequence. Handtmann's application engineers can provide process time estimates for specific part programs based on workpiece drawings during the machine evaluation process.

Both the Handtmann PBT 160 and MTorres TORRESMILL target large-format aerospace structural aluminum machining with comparable working envelopes. MTorres machines have a strong installed base at major European aerospace primes including Airbus and their Tier 1 aerostructure suppliers. Handtmann is similarly well-established in German and European aerospace machining supply chains. The two machines are technically comparable; selection typically comes down to commercial relationships, service network geography, and specific application requirements confirmed during machine evaluation trials.

The PBT 160 requires a facility bay of approximately 12 to 14 meters in length, 8 meters in width, and 6+ meters in height to accommodate the machine structure, access clearances, and chip conveyor systems. A reinforced concrete foundation is required, with specifications from Handtmann engineering based on the site's soil conditions and floor load requirements. Overhead crane access is required for workpiece loading. Three-phase power at the machine's full rated current draw, high-volume coolant and chip management infrastructure, and industrial ventilation for aluminum mist are all required facility utilities.