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KJC · original
The KJC 6314-20 rotary joint feeds coolant, emulsion or air from a stationary supply through the rotating spindle directly to the tool — this system is known as coolant through spindle (CTS, internal tool cooling). The coolant passes through the centre of the tool and cools the cutting edges right at the point of cut, significantly extending tool life, enabling higher cutting speeds and clearing chips from deep cavities.
The KJC 6314 series design is based on a pair of silicon carbide (SiC) seals that withstand high pressures and speeds without leaking or wearing. The body material is SUS304 stainless steel, ensuring resistance to corrosion and aggressive coolant emulsions. The designation 20 corresponds to a 20 mm through-channel diameter and the connection thread size.
Functionally it is a proven, more affordable replacement for the pricier Deublin brand (RotoFlux series) — the KJC 6314-20 offers comparable technical parameters and service life at a significantly lower purchase price. In practice it is a full-fledged alternative for machines where reliability and value for money are the primary criteria.
The KJC 6314-20 rotary joint is used in CNC machining centres and lathes equipped with an internal tool cooling (CTS) system. It is found on machines with a CTS-ready spindle.
The rotary joint must match the specific spindle — they differ in diameter, pressure and flow. That's why, before ordering, we verify the spindle type and the cooling operating parameters. What we'll need from you →
Send the type, year of manufacture and a photo of the nameplate — we'll verify the variant and send a quote, usually within 24 hours.
