1. Machine model and name

CK61XXX series CNC Heavy duty horizontal lathe for 30tons,40tons and 50tons

2、Product Features

This machine tool is primarily used for machining various horizontal workpieces, including external cylindrical surfaces, end faces, grooving, parting, taper turning, arcs, curved surfaces, and thread cutting.

The machine features the following characteristics: The main drive and feed drive are separate systems. It employs a Siemens 828D CNC system, with X-axis and Z-axis utilizing linear encoders for full closed-loop control. The bed adopts an integral three-track design, and the carriage guideways are protected by stainless steel telescopic guards. The headstock uses a through-shaft design with two-point support.

It is equipped with a box-type tool post; Tailstock movement and tailstock sleeve movement are motor-driven. Tailstock clamping employs a disc spring clamping with hydraulic release mechanism, while the locking plate uses manual operation. Sleeve clamping adopts a disc spring clamping with hydraulic release structure. An operator walkway and pendant control station are provided for convenient operation.

The machine is configured with one set of open-type center rest and one set of closed-type center rest.

3、Operating Environment

Environmental Temperature: 5℃–45℃
Relative Humidity: ≤85%
Power Supply System: 3-phase 380V±10%
Power Frequency: 50Hz±2Hz

4、Main Parameter

4.1Specifications

4.2 Spindle Drive

4.3 Infeed transmission

4.4 Tailstock

4.5 Steady Rest

5、Machine Tool Accuracy

Machine Tool Key Accuracies
Axial runout of headstock center: 0.015 mm
Radial runout of headstock center: 0.015 mm
Axial runout of tailstock center: 0.012 mm
Radial runout of tailstock center: 0.02 mm
Workpiece surface roughness: Cylindrical surface Ra 1.6 (turning)
Roundness of machined workpiece: 0.012 mm
Cylindricity of machined workpiece: 0.04 / 500 mm

6、Structural Description of Main Components:

6.1machine bed

The machine bed is constructed from high-strength cast iron using resin-bonded sand molding. Featuring an integral three-track design, the bed provides excellent anti-overturning capacity when supporting workpieces. The primary guideways undergo medium-frequency quenching treatment, significantly enhancing wear resistance.

The rectangular three-track cross-section guides longitudinal movement of the apron and tailstock. As the machine’s foundational component, the bed’s rigidity directly impacts overall performance and accuracy. Manufactured via resin-bonded sand molding and premium cast iron casting, the bed exhibits superior surface finish and structural strength. Its optimized rib layout delivers exceptional resistance to cross-section distortion, increases damping capacity, and effectively improves vibration resistance. Chip evacuation holes at the machine’s base ensure efficient swarf removal. Wear-resistant material bonded to the saddle sliding surfaces reduces friction and extends machine life.

To minimize cutting overturning moments and maintain operational precision, the full-length bed is supported on multiple adjustable leveling pads secured by anchor bolts. This expands the bed-foundation contact area, enhancing long-term geometric stability. The tool post guideways are protected by stainless steel telescopic guards for effective shielding.

6.2Headstock

The headstock features an independent hydraulic control system and lubrication system. It is bolted to the base, which in turn is bolted to the machine bed. The machine's spindle bearings utilize internationally renowned premium bearings, ensuring high spindle rigidity and rotational accuracy. The headstock center employs a flange-mounted short taper shank design, positioned via conical surfaces and secured to the spindle with screws, enhancing connection rigidity.

The main drive is powered by an AC spindle servo motor (132kW, B3-type mounting) with a two-stage mechanical speed regulation system, enabling a spindle speed range of 0.8–160 r/min. The two-speed gear shifting in the headstock is hydraulically actuated via solenoid valve-cylinder assemblies. Both front and rear sides of the headstock are equipped with button stations for jogging, continuous forward/reverse rotation, and stopping the spindle.

For workpiece clamping, the machine employs a heavy-duty chuck with mechanical force-multiplying jaws, significantly reducing operator effort and improving efficiency. A flow sensor with alarm function is installed in the recessed niche on the headstock rear wall, triggering alerts when lubrication flow is insufficient. An encoder is mounted at the rear end of the spindle to enable thread cutting functionality.

6.3Tailstock

The tailstock adopts a split upper/lower body structure. The lower body contains the tailstock rapid traverse mechanism, locking mechanism, lubrication pump, etc. Inside the upper body, the front end of the tailstock sleeve spindle is supported on a double-row radial roller bearing, providing high rigidity identical to the headstock spindle. The rear end of the tailstock spindle is equipped with disc springs to prevent mechanism damage caused by workpiece thermal expansion, along with a hydraulic force-measuring device. The center features a flange-mounted short taper shank. Pressure gauges are installed on both the front and rear of the tailstock, allowing operators to select and set the appropriate pressure value (via indicator position) based on workpiece weight and clamping force specifications.

The tailstock and tailstock sleeve each have independent motors for rapid movement, both equipped with overload protectors. Clamping between the tailstock lower body and machine bed uses a disc spring clamping with hydraulic release mechanism. Note: The tailstock locking plate must be disengaged before activating the rapid traverse motor. Wear-resistant material is bonded to the tailstock guideway surfaces to effectively reduce bed rail wear. The sleeve movement offers both rapid and slow speeds for operational convenience.

6.4  Tool post

The box-type tool post is suitable for heavy-duty horizontal lathes, used for rough and finish machining of various shaft-type components. It is particularly applicable for heavy-duty cutting (rough machining) and machining of stepped shafts, deep grooves, and end faces. The tool plates are divided into main and auxiliary plates, mounted on both sides of the box-type tool post body. They can extend and retract independently and are secured to the tool post body with clamping plates. The extension length of the tool plates can be set as needed, and the movement mechanism is manually operated.

The tool post consists of a large carriage and an upper tool holder integrated with the feed box. The longitudinal movement of the tool post adopts a dual gear-helical rack backlash elimination structure. After backlash elimination, motion is transmitted from the servo motor through a reducer to the gears and rack, driving the carriage. This ensures transmission accuracy while enhancing load capacity.

Both the Z-axis and X-axis of the tool post are driven entirely by AC servo motors. The transverse rapid traverse speed is 4000 mm/min with a feed range of 0.1–1000 mm/min. The maximum tool plate travel is 350 mm. The longitudinal rapid traverse speed is 4000 mm/min with a feed range of 0.1–500 mm/min. The upper section of the large carriage body features a box-type vertical tool plate structure on both sides, offering greater rigidity than conventional tool posts and making it suitable for heavy-duty cutting.

6.5Center Rests

This machine tool is equipped with one set of closed-type center rest and one set of open-type center rest. The closed-type center rest adopts a roller-slider mechanism; the open-type center rest features a wheel-type structure. Center rests use manual gear-rack adjustment for positioning only. All center rests can be manually moved longitudinally along the machine bed.

6.6Hydraulic and Lubrication System

All parts of the machine tool are equipped with independent lubrication systems.
The hydraulic system is divided into two major parts: the headstock hydraulic system and the tailstock hydraulic system.
The main function of the headstock hydraulic system is to lubricate the bearings and gears inside the headstock, and to operate the headstock gear shifting cylinder.
The main function of the tailstock hydraulic system is the loosening/clamping of the tailstock sleeve.
The kinematic pairs of the tool turret are lubricated by a centralized lubrication station.

6.7Machine Guards and Lighting

An X-direction and Z-direction stainless steel telescopic guideway guard is installed on the tool turret.

The control station is fixed to the carriage and is fitted with an operator panel and CNC control panel.

A work lamp is mounted on the top of the tool turret.

6.8 Automatic Chip Conveyor  and Tool Cooling System (Optional)

The machine tool is equipped with a chain-plate-type automatic chip conveyor and a tool cooling system. Coolant is pumped from the chip conveyor's tank through coolant hoses routed inside the cable carrier to the tool position, cooling both the tool and cutting zone. This improves cutting efficiency and extends tool life. The chip conveyor automatically collects chips into a ground-level chip collection tank.

7、Machine Tool Electrical Configuration

The spindle servo motor and drive adopt a domestic system, while the CNC system employs the Siemens 828D system.
The electrical control cabinet features an aesthetically pleasing design, with gaps specially sealed for dust prevention.
All internal electrical components are selected from reputable brand products.
The cabinet is equipped with an air conditioner.
This electrical control cabinet delivers excellent stability and reliability.

8、Detailed List of Major Components

9、Machine Tool Main Scope of Supply and Component Materials

9.1Scope of Supply

10、Accompanying Accessories (Subject to final confirmation in the PACKING LIST)

10.1Accompanying Accessories and Tools