LX86M-234 rotary joints

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LX86M-234 is a bearing embedded rotary joint produced by RIX (Rocky Joint) in Japan, specifically designed for machine tool spindles. It supports the transmission of coolant, oil mist, or dry air, with typical parameters of pressure 0.5-7 MPa, speed ≤ 15000 min ⁻¹, and temperature ≤ 60 ℃. It adopts a dual drainage structure to prevent leakage and is suitable for vertical/horizontal installation. ‌‌
Type: Bearing concealed type (spindle through type), model suffix “M” represents coolant/oil mist compatibility, non dry air specific (V-type is only suitable for dry air).

Fluid compatibility: water-based/oil-based coolant, oil mist, trace dry air (non continuous dry high-speed working conditions).
Sealing structure: dual drainage design, isolates fluid from bearings, extends service life; Early models often used wear-resistant rubber or polytetrafluoroethylene seals (non silicon carbide, silicon carbide is commonly found in the LX86V series).
Performance limit: maximum pressure of 7 MPa, maximum speed of 15000 rpm, recommended minimum working flow rate ≥ 10 L/min to ensure sealing lubrication.
Installation direction: Supports vertical (rotating face up or down) and horizontal installation; ‘234’ usually refers to threaded connections (such as R1/2 or NPT 1/2), different from the flange type of ‘244’.
Typical applications: spindle internal cooling and MQL micro lubrication system for machining centers such as Mazak and Little Giant. ‌‌
structural characteristics
Single channel coolant or MQL (oil mist)
Closed seal, automatic production line for similar applications
Full flow design, no debris or burr blockage generated
The bearing supports a threaded rotor for easy installation
Deep groove ball bearings ensure smooth operation
Maze system and large leakage port are used to protect ball bearings
The balanced mechanical seal made of silicon carbide material can ensure a long service life even in harsh operating environments
Anti corrosion anodized aluminum shell