Machine Tools
INDUSTRY APPLICATION
Machine tools are the foundation of manufacturing. They demand steel with extreme rigidity, dimensional stability, and wear resistance — from high-speed spindles to precision guideways and gear boxes that absorb repeated shock and torque.
Carbon Steel Round Bar
Carbon steel covers machine tool bases, frames, and general drive shafts. S45C (quenched and tempered) provides excellent strength-toughness balance for spindle housings and drive shafts. S50C and S55C are favored for guideway sliders and locating pins requiring wear resistance. Higher-carbon 1060 steel suits elastic clamping elements and shims where both hardness and resilience are needed.
Alloy Steel Round Bar
Alloy steels carry the highest-performance components. SCM440 Q&T is the go-to for high-speed spindles, balancing rigidity, toughness, and dimensional stability under combined cutting, centrifugal, and thermal loads. SCM415/420 carburized and quenched delivers hard surfaces with tough cores for transmission gears and worm gears. SNCM220 (8620) adds nickel for superior case toughness in heavily loaded gears and spline shafts. Hardenability-guaranteed grades (SCM440H, 4140H, 8620H, etc.) ensure consistent heat treatment results across batches — critical for noise control and service life.
Precision Ground Bar
Precision ground bar is indispensable for guide pillars, piston rods, and linear guide shafts that require extremely tight surface finish and roundness. Unlike black bar that requires multiple turning and grinding passes, ground bar ships ready to use with tight dimensional tolerances, significantly reducing machining lead time.
Free-Cutting Steel
Free-cutting steels (SUM22, SUM24L) serve the high-volume turned parts in machine tools. Sulfur or lead additions generate short chips instead of long stringy ribbons, enabling faster, more stable automated lathe production for connectors, bushings, oil nozzles, and locating seats.