Ground helical racks for superior precision and durability
July 2026
Motion Control & Drives
KHK USA, a factory-owned distributor of the KHK brand of metric gears, has announced its ground helical rack series, engineered to deliver smooth operation, high torque transmission and long-lasting performance in precision motion systems. These ground helical racks are designed for demanding environments such as machine tools, high-speed automation equipment, and precision positioning systems where accuracy and quiet operation are essential.
The ground helical racks are manufactured from SCM440 alloy steel and undergo thermal refining and induction hardening to achieve outstanding strength, rigidity and wear resistance. Precision grinding to JIS Grade N6 (KHK Grade 1) ensures each rack meets the most stringent accuracy requirements, resulting in highly consistent surface quality and superior gear contact.
Offered in modules ranging from M1 to M6 and in standard lengths of 100, 500 and 1000 mm, the ground helical rack series accommodates a wide range of system configurations. The line-up includes the KRHG models with standard configuration for general applications; the KRHGF models featuring machined ends for easy connection and alignment; and the KRHGFD models equipped with machined ends and bolt holes for seamless, secure assembly.
The ground helical racks are carefully ground-finished for smooth motion, high positional accuracy and optimal performance when paired with KHK helical pinions. Like all KHK stock gears, the series is available off the shelf and is compatible with standard metric helical pinions, allowing engineers to build precise and efficient motion systems without custom manufacturing delays.
For more information contact KHK, +1 516 248 3850, [email protected], www.khkgears.us
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