YCM HB 800

The HB 630 uses a 630 x 630 mm pallet (smaller), has a lower pallet payload capacity, and is priced approximately $100,000–$150,000 less than the HB 800. The HB 800's 800 mm pallet provides substantially more table area and 2,000 kg payload — critical for shops regularly machining parts that exceed the HB 630's pallet boundary or payload limit. Shops whose largest parts fit within a 630 x 630 mm pallet and 1,500 kg limit should save the capital and choose the HB 630. Shops producing parts that approach or exceed 800 mm in any face dimension need the HB 800.

The HB 800's B-axis (rotary table) provides 1° index resolution and 0.001° interpolation for full 4-axis simultaneous contouring. In production, shops typically program 4-sided machining cycles: all features on face 1 (spindle facing the part) → B-axis rotates 90° → all features on face 2 → 90° rotation → face 3 → 90° → face 4. This completes machining of a box-shaped casting on four sides in one setup, maintaining precise geometric relationships between face features that multiple VMC setups cannot guarantee. For complex prismatic parts, 4-sided HMC machining routinely reduces total process time by 30–60% versus VMC multi-setup alternatives.

The YCM HB 800 is available with 2-pallet (standard), 4-pallet, 6-pallet, and 8-pallet pool configurations. Larger pallet pools enable longer unattended production runs — a 6-pallet pool with pre-loaded fixtures can run 6 full machining cycles before requiring operator intervention. For lights-out overnight production, a minimum 4-pallet pool is typically recommended; 6- or 8-pallet pools are preferred for programs where each pallet cycle runs 30–60 minutes. Pallet pool expansion adds cost ($80,000–$150,000+ depending on pool size) but typically justifies itself quickly in shops running weekend or overnight unattended production.

The HB 800's BT 50, 26 kW (34.8 hp) spindle with 1,194 N·m maximum torque is designed for heavy face milling, large-diameter boring, and deep-hole drilling in steel and cast iron. In practice, shops routinely run 200 mm diameter face mills in gray cast iron at 2.0–3.0 mm depth of cut with the HB 800's spindle — operations that would stall or cause chatter on lower-power HMCs. For aluminum, the relatively modest 6,000 RPM limits surface speed on small-diameter cutters; shops processing primarily aluminum would benefit from a higher-RPM HSK spindle version if available from YCM for specific configurations.

The HB 800 at approximately 15,000 kg requires a dedicated machine foundation — typically 600–800 mm of reinforced concrete with engineered anchor bolt placement per YCM's foundation drawing. The machine's footprint with the pallet station requires clearance for pallet loading with an overhead crane; typical bay height of 5 m or more is needed. Three-phase 380/480 VAC power supply, compressed air (6 bar / 87 PSI, 500 L/min), and coolant drain provisions are required. YCM provides a site preparation guide and will conduct a pre-installation survey for HB 800 customers in most regions.