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LNS Hydrobar Sprint 552 and 565 bar feeds provide stability while reducing bar vibration. As a result, they can improve productivity by enabling increased spindle speeds while improving surface finish and extending tool life. Both models have improved stiffness-to-weight ratios compared to the company’s Sprint S2. The model 552 accepts bar stock diameters from 1/4" to 2" (5 mm to 52 mm). The model 565 accepts bar stock diameters from 1/4" to 2 5/8" (5 mm to 65 mm). Both units operate with fixed or sliding headstock machines and can operate in either hydrodynamic or hydrostatic modes. Hydrostatic operation permits cutting as much as 12' of bar stock at high spindle speeds without harmful vibrations, the company says. The hydrodynamic principle allows for a wider range of bar stock diameters, fewer guiding elements, and 2- to 8-minute change-overs. The bar feeds include other features such as remnant disposal through the lathe or through the bar feed; no manual intervention for bar feed selection or front stabilizer adjustments; servo-driven, automatic torque and speed according to bar diameter; and quick, easy setups through a menu-driven remote control, the company says.