Kenturn High-Precision Spindle Cartridges & Motor Spindles
SpareX supplies the full portfolio of genuine machine tool spindles engineered by Kenturn Nano. Tec. Co., Ltd. From ultra-high-speed motorized milling spindles to heavy-duty belt-driven and CNC lathe spindle units, we provide direct drop-in replacement assemblies, machine retrofits, and genuine maintenance spare parts worldwide.
Kenturn Spindle Series & Equipment Solutions
Explore Kenturn spindle product families below or submit your existing machine spindle nameplate data for exact interchangeability and lead-time calculation.
Kenturn built-in motorized spindles (M, MB, MD, MH, and MC series) are engineered for high-performance 3-axis and 5-axis machining centers, gantry mills, and die/mold manufacturing.
By integrating a high-efficiency AC induction or synchronous permanent magnet motor directly into the spindle housing, mechanical belt vibration and transmission backlash are completely eliminated.
Equipped with super-precision ceramic hybrid angular contact bearings and high-resolution optical/magnetic encoders, these spindles deliver outstanding dynamic balancing (ISO G0.4) and rigid tapping precision.
Tool interface options include BT30, BT40, BT50, and HSK-A63/A100 with high-pressure coolant through spindle (CTS up to 70 bar).
Speed range 12,000 to 30,000 RPM, power up to 37 kW, torque up to 220 Nm, dynamic balancing grade ISO G0.4.
Kenturn belt-driven spindles (KCA, KC, KB, and KD series) provide heavy-duty cutting capability and high rigidity for vertical and horizontal milling machines and boring centers.
Built with stabilized cast iron or alloy housings, they incorporate matched sets of high-precision angular contact bearings arranged in tandem duplex and triplex preloaded configurations.
Power transmission via heavy-duty timing belts ensures massive torque transfer at low-to-medium speeds for cutting alloy steels, cast iron, and titanium. Popular configurations include KCA1410Z, KCA1410WAB, KCA1410WCA, and KCA1410WBB cartridges with thorough quality testing.
Kenturn direct-drive spindles (DDS, DC, DH series) couple directly to the servo spindle motor through a high-precision, zero-backlash flexible disc coupling.
Eliminating side belt tension removes radial overhang loads on rear bearings, significantly reducing operational noise, minimizing thermal distortion, and improving surface finish Ra values.
DDS spindles operate smoothly at speeds up to 12,000–15,000 RPM, accommodating dual-contact BBT40/BBT50 or HSK-A63 tooling for high-accuracy die and mold profiling with minimal runout.
Speed 10,000–15,000 RPM, direct coupling to Fanuc, Mitsubishi, Siemens spindle motors, BBT40/HSK-A63 interfaces.
Kenturn CNC Lathe Spindles (KTL, KTB, KTM Series)
Kenturn CNC turning spindles (KTL, KTB, and KTM series) are built for heavy-duty lathe turning operations demanding superior dynamic rigidity and minimal runout under heavy, interrupted cuts.
The front spindle arrangement incorporates heavy-duty double-row cylindrical roller bearings paired with angular contact thrust ball bearings for supreme radial and axial rigidity.
Standard spindle noses comply with ISO 702-1 (A2-4, A2-5, A2-6, A2-8, and A2-11 standards) with through-hole bore sizes spanning from 32 mm up to 117 mm for bar turning automation.
Nose specs A2-5 to A2-11, through-hole up to 117 mm, speed range 2,500 to 6,000 RPM, flange runout within 2 microns.
Kenturn grinding spindles (KGS, KGL, and GS series) are specifically developed for surface, cylindrical, and internal grinding machines where sub-micron rotation accuracy and zero vibration are mandatory.
Utilizing ISO P2 / ABEC 9 super-precision bearings, cryogenically treated alloy steel bodies, and positive air-purge labyrinth seals, these spindles resist abrasive slurry contamination and thermal expansion.
Total radial runout at the nose is strictly under 1 micron, balanced dynamically to ISO 1940 G0.4 standard for flawless mirror surface grinding.
Speed from 1,500 to 90,000 RPM (internal grinding quills), nose runout under 1 micron, dynamic balance ISO G0.4.
Kenturn High-Speed Machining Spindles (HSM Series up to 60,000 RPM)
Kenturn HSM (High-Speed Machining) spindles are purpose-built for fine-milling hardened mold steels up to 65 HRC, graphite electrodes, and dental/electronic micro-machining.
Incorporating silicon nitride (Si3N4) ceramic hybrid bearings drastically reduces centrifugal expansion and internal friction by 40%, enabling continuous high-efficiency operation at 30,000 to 60,000 RPM.
Integrated HSK-E25, HSK-E32, HSK-E40, and HSK-F63 short-taper tooling ensures outstanding concentricity and dynamic balance during micro-tool cutting.
Kenturn Genuine Spindle Bearings, Grippers & Maintenance Parts
We deliver genuine factory-matched Kenturn replacement parts for spindle overhaul and preventative maintenance: matched sets of precision angular contact bearings (ISO P4/P2 duplex, triplex, quadruplex matched pairs), 4-segment collet grippers (BT30, BT40, BT50, and HSK configurations), heavy-duty disc springs rated for over 2,000,000 clamping cycles, high-pressure rotary unions (CTS), tool unclamp hydraulic pistons, and precision labyrinth seal assemblies.
Matched bearing sets from Kenturn/NSK/FAG, BT/HSK grippers, Belleville disc springs, high-pressure CTS rotary unions.
Kenturn Direct Spindle Retrofit & Machine Tool Replacement
Kenturn Nano. Tec. spindles serve as original equipment and direct retrofits for dozens of global machine tool builders, including Doosan / DN Solutions, Hyundai WIA, Victor Taichung, Hartford, Tongtai, Feeler, Leadwell, YCM, Quaser, Dah Lih, Akira-Seiki, Goodway, and Chevalier.
In the event of catastrophic spindle failure or end-of-life wear, we engineer direct drop-in replacement cartridges matched by housing dimensions, flange bolt circles, tool tapers, and motor interfaces for zero-modification installation.
Direct drop-in replacement with zero machine alterations, full CNC compatibility (Fanuc, Heidenhain, Siemens).
To identify the exact Kenturn replacement spindle for your machining center, simply provide the nameplate model code and serial number, or essential mechanical specifications: housing cartridge outer diameter, overall length, nose projection, tooling taper interface (BT, BBT, HSK, CAT), maximum operational RPM, motor power and torque curves, and cooling circuit configuration. Our engineering team cross-references technical blueprints across the Kenturn database to deliver an identical dimensional and electrical match, ensuring seamless plug-and-play installation without structural modifications to the machine headstock.
For maintenance departments and specialized spindle rebuilding facilities, SpareX supplies genuine factory-matched angular contact bearing sets (ISO P4 and P2 matched duplex, triplex, and quadruplex sets with precision calibrated preloads), 4-segment tool gripper collets for BT30, BT40, BT50, and HSK clamping mechanisms, fatigue-resistant Belleville disc springs rated for over two million clamping cycles, high-pressure rotary unions for coolant through spindle (CTS up to 70 bar), labyrinth air-purge rings, and contactless position sensors.
Contact SpareX Spindle Application Specialists
Submit your spindle model code, engineering drawings, or machine operational requirements. SpareX technical specialists will prepare a comprehensive proposal detailing unit pricing, delivery schedules, and mechanical verification datasheets.
