Auto Strong / Di Chun Lathe Chucks and Hydraulic Cylinders

Precision machine tool workholding Auto Strong / Di Chun: rotary hydraulic cylinders MM1036B, thru-hole power chucks N-200A, non thru-hole chucks V, collet chucks CR.

Auto Strong / Di Chun MM series rotary hydraulic cylinders

Super high speed compact thru-hole rotary hydraulic cylinders Auto Strong / Di Chun series MM0933B, MM1036B, and MM1246B actuate CNC lathe power chucks up to 8000 rpm. An integrated check valve maintains safe draw tube pull force if hydraulic circuit supply drops during turning.

Through hole bore diameters from 33 mm to 78 mm accommodating long bar stock and coolant flow
Maximum spindle rotation speed reaching 8000 rpm under nominal hydraulic pressure of 4.0 MPa
Internal safety check valve system retaining steady clamping thrust during emergency shutdown
Lightweight aluminum body design engineered to minimize spindle inertia on rapid turning centers

Auto Strong / Di Chun N-200A series thru-hole power chucks

Three-jaw thru-hole power chucks Auto Strong / Di Chun series N-206A, N-208A, and N-210A are forged from SCM440 alloy steel. The balanced wedge mechanism transfers high draw bar pull into rigid radial gripping force while keeping workpiece clamping repeatability within 0.01 mm.

Forged SCM440 alloy steel structure with induction hardened master jaw guide ways for endurance
Generous central bore diameters from 45 to 117 mm tailored for continuous bar turning routines
Precision workpiece centering repeatability maintained within tight 0.01 mm to 0.015 mm limits
Direct spindle mount adapters compatible with standard A2-5, A2-6, and A2-8 machine spindles

Auto Strong / Di Chun V and VT non thru-hole power chucks

Wedge type non thru-hole hydraulic power chucks Auto Strong / Di Chun series V-206, V-208, and VT-210 deliver superior rigidity for CNC turning where long stroke gripping and chip exclusion are mandatory. Designed for heavy stock removal operations on dense forgings and billets.

Enclosed front face prevents fine metal swarf and grinding sludge entering internal wedge drive
Elevated radial gripping force engineered for heavy turning on tough heat treated metal blanks
Precision ground internal tapers and guide surfaces securing durable dynamic gripping balance
Matched drive linkage connecting with MS and MSC non thru-hole rotary hydraulic actuators

Auto Strong / Di Chun MS and ML large rotary cylinders

Heavy duty rotary hydraulic actuators Auto Strong / Di Chun series MS250C, MS300C, and ML-2816 are engineered for large CNC lathes driving power chucks up to 1600 mm diameter. Incorporating piston stroke proximity sensors and drain ports to handle continuous heavy turning schedules.

Expanded piston surface generating axial draw bar pull forces exceeding 60 kN to 120 kN easily
Integrated mounting brackets for inductive limit switches monitoring exact stroke travel limits
Built-in hydraulic collector housing with dedicated low pressure drain return connection paths
Precision balanced bearing assemblies with air oil lubrication keeping operating heat minimal

Auto Strong / Di Chun CR and CRA series collet chucks

Precision spring collet chucks Auto Strong / Di Chun series CR-36, CR-42, and CRA-60 handle rapid bar feeding on automated turning centers. The quick change nose cap enables rapid collet swaps for different raw bar diameters without dismounting the chuck assembly from the lathe spindle.

Accepts standard spring collets for accurate clamping of cold drawn bars, tubing, and hex blanks
Fixed workpiece axial datum maintained during clamp cycle preventing axial part displacement
Super tight runout accuracy held under 0.008 mm to 0.010 mm measured on ground test mandrels
Front quick change retaining cap minimizing tooling setup time during frequent diameter shifts

Auto Strong / Di Chun PB-ES series pneumatic power chucks

Front mounted pneumatic chucks Auto Strong / Di Chun series PB-ES600 and PB-ES850 incorporate internal air cylinders and huge through bores. Widely deployed for threading and beveling heavy oilfield drill pipes and seamless tubing without needing long spindle draw tubes.

Internal built-in pneumatic actuator eliminating need for rear cylinders and heavy draw bars
Extra large thru-hole bore dimensions reaching 275 mm to 375 mm for seamless oilfield pipe pass
Twin integrated safety non return air valves retaining clamping pressure upon air line drop
Delivered with heavy duty hardened stepped jaws gripping thick wall alloy tubing firmly

Architecture and safety check valve mechanism of MM series rotary cylinders

Super high speed compact rotary hydraulic actuators Auto Strong / Di Chun series MM including MM0933B, MM1036B, and MM1246B are engineered to drive rapid CNC lathe chucks at rotation speeds reaching 8000 rpm.

The internal actuator chamber integrates a safety check valve and pressure relief spool that preserves hydraulic pressure within the piston volume during unexpected pump power interruptions.

This mechanism locks power chuck grip force firmly, preventing workpiece dislodgement during high velocity turning cycles.

The lightweight aluminum body minimizes rotating inertia on precision spindles, suppressing vibration harmonics and ensuring dependable workpiece concentricity during fine finishing cuts.

Wedge drive kinematics and alloy steel structure of N-200A thru-hole chucks

Three-jaw thru-hole power chucks Auto Strong / Di Chun series N-200A including N-206A, N-208A, and N-210A employ a balanced wedge mechanism that translates axial cylinder pull into rigid radial jaw clamping motion.

Forged from Japanese SCM440 alloy steel, the chuck body features induction hardened master jaw guide ways that withstand prolonged abrasive machining conditions during production runs. Large central through bores from 45 mm to 117 mm facilitate continuous bar feeding from automated magazines.

Precision ground wedge tapers maintain workpiece clamping repeatability within 0.010 mm to 0.015 mm, providing high dynamic balance and dependable torque transmission on CNC lathes.

Design advantages and swarf exclusion of V and VT non thru-hole chucks

Non thru-hole power chucks Auto Strong / Di Chun series V and VT are purpose-built for heavy turning environments where cutting swarf and liquid coolants must be excluded from spindle mechanisms.

The solid monolithic front face encloses the internal wedge drive and draw bar connector, blocking abrasive debris when turning heavy forgings, raw billets, and tough alloy blanks.

Hardened master jaw slideways deliver elevated radial gripping forces, preventing workpiece micro-slippage under aggressive interrupted cutting tool passes.

Series V and VT power chucks mount directly to international spindle flanges and interface smoothly with non thru-hole hydraulic actuators such as MS and MSC series.

High capacity MS and ML series hydraulic actuators for large CNC lathes

To actuate large power chucks from 600 mm to 1600 mm diameter, Auto Strong / Di Chun manufactures high thrust rotary hydraulic cylinders series MS and ML.

Actuator models MS250C, MS300C, and ML-2816 utilize expanded piston surface areas that generate axial draw bar pull forces exceeding 100 kN under standard hydraulic circuit pressures.

An integrated coolant collector catches oil weepage and fluid mist, returning drainage to reservoir lines without leaking onto machine spindle housings.

External sensor brackets accommodate inductive proximity switches that track piston travel endpoints and deliver positive clamp confirmation signals to CNC machine automation.

Collet chuck kinematics for high speed bar work on automated turning centers

Spring collet chucks Auto Strong / Di Chun series CR and CRA deliver streamlined workholding for rapid bar turning on CNC automatic lathes. Mounted directly to the spindle nose, the chuck secures standardized spring collets through forward thrust cone action.

This push-to-clamp principle eliminates axial workpiece movement during collet closure, securing precise length tolerances on stepped shafts and precision pins.

The quick-change threaded nose cap enables operators to switch collet inserts for different stock diameters within minutes without dismounting the chuck assembly, maintaining radial runout precision below 0.010 mm.

Workholding identification and specification verification via factory nameplates

Accurate replacement part identification across Auto Strong / Di Chun chucks and cylinders relies on data stamped onto the manufacturer metallic nameplate.

The nameplate records the full model designation such as MM1036B cylinder or N-208A power chuck, unique factory serial number, maximum spindle speed, and allowable hydraulic operating pressure.

Technical specialists use these identifiers to confirm master jaw serration pitch (1.5 mm x 60 degrees), draw tube connector threads, spindle adapter dimensions, and internal seal repair kit part numbers, ensuring complete dimensional compatibility during planned machine tool overhauls.

Auto Strong / Di Chun and model names are trademarks of their respective owners and are used only to identify the equipment for which we source parts. SpareX is not an official dealer, distributor or representative of Auto Strong / Di Chun and is not affiliated with the trademark owner. Origin, documents and warranty are stated for each item in the quotation.