We supply high-precision CNC lathe and milling tool accessories manufactured by Taizhou Dajiu Mechanical Accessories Co., Ltd. for CNC turning centers and machining centers. Our engineering team provides spindle interface verification, cutting force calculations, and direct factory procurement of genuine live centers, toolholders, and chucks for demanding industrial operations.
DA-JIU Precision Tooling & Clamping Portfolio
Select a category of DA-JIU turning or milling toolholder accessories for CNC machine tools. You may attach technical specifications, cutting tool lists, or machine spindle interface drawings.
DA-JIU DJ-06006 Precision CNC Lathe Live Centers (MT2–MT6)
DA-JIU DJ-06006 series precision CNC lathe live centers are engineered for high-precision finishing and semi-finishing operations on CNC turning centers. Featuring angular contact ball bearings and needle thrust bearings, they achieve a verified radial runout under 0.005 mm (5 microns).
Available in Morse Taper sizes MT2 through MT6, accommodating radial workloads up to 1,500 kg at spindle speeds up to 5,000 RPM.
Selection criteria: tailstock Morse Taper (MT2–MT6), maximum payload, cutting speed, and point profile (standard or extended point L).
DA-JIU DJ-06008 & DJ-07022 High-Speed CNC Lathe Live Centers
DA-JIU DJ-06008 high-speed live centers are designed for high-velocity CNC turning applications running up to 6,000 RPM. Engineered with specialized low-friction angular bearings and an integrated needle support assembly, they maintain exceptional concentricity under elevated thermal conditions.
A multi-stage labyrinth and lip seal system effectively prevents coolant mist and metallic fines from entering the bearing cavity.
Selection criteria: spindle operating RPM (up to 6,000 RPM), Morse taper MT3–MT5, sealing requirements, and extended nose DJ-L06008 availability.
DA-JIU DJ-08010 & DJ-08020 Heavy-Duty Live Centers (up to 20 Tons)
DA-JIU extra-heavy-duty live centers DJ-08010 and DJ-08020 are built for turning heavy forgings, turbine rotors, mill rolls, and large forgings. Featuring heavy cylindrical roller thrust bearings and high-tensile alloy forged bodies, they withstand radial loads up to 20,000 kg (20 metric tons).
Available in Morse Taper MT6 and metric taper shanks 80, 100, and 120 (1:20 taper ratio) with verified runout within 0.010–0.015 mm.
Selection criteria: workpiece weight (up to 20 tons), taper shank (MT6 or metric 80/100/120), thrust clamp force, and overhang length.
DA-JIU DJ-01002 precision ground drill chuck arbors provide rigid, concentric connection between drill chucks and machine tool spindles. Machined from hardened alloy steel with synchronized cone grinding to ensure runout under 0.005 mm.
Supplied in Morse Tapers MT1 through MT5 with tang drive for drilling machines or internal drawbar threads for CNC milling centers, adapting to DIN B10–B24 and Jacobs JT1–JT33 tapers.
Selection criteria: spindle taper (MT1–MT5), clamping retention (tang or drawbar), and chuck mount taper (B12, B16, B18, B22, JT3, JT6).
DA-JIU DJ-02002 Morse taper reduction sleeves provide rigid, highly concentric adaptation for cutting tools with smaller Morse shanks into larger machine spindle sockets.
Fully hardened to HRC 56–60 with precision-ground internal and external tapers, delivering contact area exceeding 85% and runout limits under 0.015–0.020 mm across standard reductions from MT2-1 up to MT6-5.
DA-JIU DJ-09032 Torque-Controlled Tapping Chucks with Axial Float
DA-JIU DJ-09032 quick-change tapping chucks are engineered for tapping blind and through holes from M3 up to M42 on CNC machining centers and tapping machines.
They integrate two-way axial float compensation to absorb pitch feed discrepancies and an adjustable ball-detent safety torque clutch that automatically slips when cutting resistance exceeds thresholds, preventing tap breakage in blind bottoms.
DA-JIU F1 Series Precision Micrometer Boring Heads (DJ-13002)
DA-JIU F1 series precision micrometer boring heads enable high-accuracy boring from 10 mm up to 320 mm on milling machines, boring mills, and CNC machining centers. Fitted with an ultra-precise ground adjustment lead screw offering 0.01 mm (0.0005 in) dial graduations.
Rigid dual-wedge locking mechanisms clamp the tool slide firmly, preventing dimensional drift during heavy or high-finish bore cutting.
Selection criteria: head body diameter (F1-50, F1-75, F1-100), tool bar bore (12, 18, 25 mm), and arbor taper (BT40, BT50, MT4).
DA-JIU DJ-257 high-speed hydraulic rotary power cylinders and paired mechanical lathe chucks provide rapid, dependable workpiece clamping on CNC turning centers. Engineered with a lightweight anodized aluminum alloy body to minimize spindle rotational inertia.
High-grade imported bearings and precision dynamic seals ensure seamless operation at spindle speeds up to 4,000 RPM under hydraulic supply pressures up to 35 kg/cm².
Selection criteria: cylinder size (257-80, 257-100, 257-125), piston stroke, maximum hydraulic pressure, drawtube connection, and spindle flange.
Design Engineering and Bearing Configuration in DA-JIU Precision Centers
DA-JIU DJ-06006 and DJ-06008 series precision live lathe centers are engineered to satisfy strict dynamic accuracy requirements across contemporary CNC turning machines.
The core rotating assembly relies on an optimized bearing arrangement composed of matched angular contact ball bearings and an auxiliary needle thrust bearing that absorbs intense axial forces exerted by tailstock quills.
Center working points are forged from chromium-molybdenum alloy tool steel, heat-treated in vacuum furnaces to HRC 60–62. Precision grinding of conical profiles on automated CNC grinders ensures that radial runout never exceeds 0.005 mm (5 microns).
Meticulous dynamic mass balancing prevents parasitic resonant vibrations and chatter marks on machined shaft surfaces even at spindle speeds ranging up to 5,000–6,000 RPM.
Multi-Stage Environmental Sealing Against High-Pressure Coolant and Swarf
Operational longevity of precision machine tool centers in harsh machining environments depends directly upon sealing integrity within the bearing chamber. Taizhou Dajiu engineers have integrated a dual-barrier sealing architecture across their live center series.
The primary front barrier incorporates a non-contact labyrinth profile that deflects the overwhelming bulk of chips and pressurized coolant streams.
The secondary barrier features a preloaded Viton (FKM) radial shaft seal that retains flexibility under operating temperatures up to +120 °C while resisting aggressive synthetic machining coolants.
Factory bearing cavities are filled with high-temperature synthetic grease enriched with extreme-pressure additives, designed for maintenance-free lubrication throughout the normal design life of the center.
Rigid Concentricity and Taper Fit in DJ-01002 Arbors and Morse Sleeves
Deploying DJ-01002 drill chuck arbors and DJ-02002 Morse taper reduction sleeves provides dependable, highly concentric coupling between cutting tools, drill chucks, and machine spindles. In taper friction drives, geometrical angle fidelity and surface micro-finish are of paramount importance.
Minor taper angle mismatch leads to narrow ring contact zones, which under heavy torsional loads provoke tool spinning, severe spindle bore scoring, and rapid runout deterioration.
DA-JIU accessories undergo simultaneous finish grinding of internal and external tapers in a single clamping setup, guaranteeing taper contact area exceeding 85% and runout limits under 0.015 mm.
For CNC milling applications, arbors are equipped with internal metric drawbar threads to prevent accidental pullout during rapid reversing cycles.
Tapping Tap Protection and Axial Float Compensation in DJ-09032 Chucks
Machine tapping on CNC milling and drilling machines entails significant tool breakage hazards caused by discrepancies between programmed axis feed rates and actual tap thread pitch, as well as bottoming in blind holes.
DA-JIU DJ-09032 tapping chucks integrate an internal dual-directional axial float mechanism that allows the tap spindle to compress or extend smoothly, absorbing feed synchronization errors during spindle reversals.
Quick-change collet adapters house an adjustable spring-loaded ball clutch: when cutting torque exceeds pre-set limits, the clutch disengages instantly, stopping the tap without breaking cutting edges.
Quick tap changes covering M3 to M42 are accomplished via push-sleeve operation without supplementary wrenches.
Essential Technical Parameters for DA-JIU Tooling Selection
Spindle or tailstock socket taper (Morse Taper MT1–MT6, metric tapers 80/100/120 with 1:20 ratio), retention arrangement (tang drive or drawbar thread), required radial runout threshold (within 0.005 mm), maximum spindle cutting velocity, workpiece weight, and overhang geometry.
We supply genuine interchangeable center tips, precision ER11 through ER40 spring collets, quick-change torque clutch adapters for tapping chucks, chuck drawtubes, and seal maintenance kits for hydraulic rotary cylinders.
Submit Technical Specification for Tooling Selection
Attach your machining process sheet, spindle taper inventory, or bill of materials for live centers and arbors. Our technical engineering specialists will compile a comprehensive commercial proposal with verified delivery lead times.
