Flat Bed CNC Lathe

Product Overview

The flat bed CNC lathe is engineered for heavy-duty metal removal and high-torque machining of shafts, flanges, and medium-to-large structural components. Unlike slant bed configurations optimized for chip evacuation in high-volume production, the traditional flat bed architecture provides superior mass distribution and rigidity for absorbing high cutting forces during roughing operations.

CNC Vertical Turning Center
Engineered for heavy-duty performance, this CNC Vertical Turning Lathe features a robust construction that ensures high rigidity and exceptionally stable operation. It is designed to deliver...
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Flat Bed Lathe Machine
The large carriage operates without overturning moment, ensuring stable machine running, long guide rail service life and excellent precision retention.
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Key Features

Rigid Bed Architecture:

One-piece Meehanite cast iron bed featuring cellular ribbing layout. Thermal aging and vibration stress-relief treatments are applied prior to machining to eliminate residual stress.

Wide Box Ways:

400 mm ultra-wide guide ways coated with Turcite-B. This minimizes stick-slip effect during micro-feeding and absorbs high-impact shock loads during interrupted turning.

High-Precision Spindle Assembly:

Supported by dual-row cylindrical roller bearings and angular contact ball bearings (P4 precision grade), restricting radial runout to within 0.008 mm.

Direct-Drive Ballscrews:

Pre-tensioned C3-grade ground ballscrews coupled directly to AC servo motors via flexible couplings, eliminating backlash and ensuring positioning accuracy (+/- 0.01 mm) and repeatability (+/- 0.005 mm).

Enclosed Lubrication & Coolant Isolation:

Automatic timed lubrication systems deliver metered oil to guide ways and ballscrews. Independent chip conveyor interfaces prevent thermal transfer from hot chips to the machine bed.

Materials & Surface Finishes

Bed & Major Structural Components:

HT300 Meehanite gray cast iron, induction hardened on sliding surfaces to HRC 50–55 (depth 2 mm).

Spindle Shaft:

42CrMo alloy steel, forged, normalized, quenched, and tempered to HB 220–250, with journal induction-hardened to HRC 55–58.

Gears (Headstock):

20CrMnTi alloy steel, carburized and case-hardened to HRC 58–62, precision ground (DIN Grade 6) for low noise and minimal backlash.

Surface Protection:

Industrial-grade epoxy primer followed by multi-component polyurethane enamel, resistant to cutting fluids, coolant emulsions, and UV exposure.

Product Range

Model Series	Max. Swing Over Bed (mm)	Max. Cutting Length (mm)	Spindle Bore (mm)	Main Motor Power (kW)	Target Workpiece Profile
CK6136 / CK6140	360 / 400	750 – 1000	52 / 62	5.5 / 7.5	Small shafts, bushings, threaded fittings
CK6150 / CK6163	500 / 630	1000 – 3000	82 / 105	11 / 15	Medium shafts, pipe threads (API), rollers
CK6180 / CK61100	800 / 1000	1500 – 6000	130 / 180	18.5 / 22	Heavy industrial rolls, marine shafts, large flanges

Technical Specifications

Specifications below reflect standard configurations for the CK6150 series.

Category	Specification	Details
Capacity	Swing over bed	500 mm
Capacity	Swing over cross slide	280 mm
Capacity	Max. workpiece length between centers	1500 mm
Capacity	Max. carriage travel (Z-axis)	1400 mm
Capacity	Cross slide travel (X-axis)	320 mm
Spindle	Spindle nose	ISO A2-8
Spindle	Spindle bore	82 mm
Spindle	Spindle speed range	30 - 2000 rpm (Stepless via inverter)
Spindle	Spindle motor power	11 kW (AC Servo/Frequency)
Feed System	Rapid traverse rate (X / Z axis)	5 m/min / 8 m/min
Feed System	Ballscrew diameter & pitch (X / Z)	25 mm x 5 mm / 40 mm x 10 mm (C3 precision grade)
Feed System	Guideway type	Hardened box ways (Width 400 mm)
Tooling & Tailstock	Turret type	4-position electric tool post / 6-position hydraulic turret
Tooling & Tailstock	Tool shank section	25 mm x 25 mm
Tooling & Tailstock	Quill diameter	75 mm
Tooling & Tailstock	Quill travel	150 mm (Morse Taper: MT5)
Control System	Standard	Fanuc 0i-TF / Siemens 828D
Control System	Resolution	0.001 mm

Applications

Oil & Gas Industry:

Machining drill collars, coupling threads, tubing, and API casing connections requiring strict concentricity and thread profile tolerance.

Automotive & Commercial Vehicles:

Turning heavy drive shafts, axle housings, brake drums, and transmission hubs.

General Engineering & Job Shops:

Versatile single-part and medium-batch production of shafts, pins, and custom sleeves for industrial machinery.

Power Generation:

Manufacturing turbine rotor components, wind turbine fastener pins, and pump shafts.

Quality Control & Inspection

Cast Iron Verification: Spectrometer analysis performed on every iron melt heat to verify chemical composition (C, Si, Mn, P, S ratios). Ultrasonic testing ensures absence of internal casting voids.

Geometric & Positional Accuracy Check: Laser interferometer measurement utilized for axis positioning and repeatability verification according to ISO 230-2 standards, backed by CMM inspection protocols available for critical sub-assemblies.

Third-Party Verification Readiness: Factory acceptance protocols accommodate independent inspections by certified agencies (such as SGS or TÜV) upon client request.

Dynamic Balancing: Spindle assemblies dynamically balanced to G1.0 grade at operating speeds up to 2000 rpm to minimize vibration and bearing wear.

Full-Load Testing: 48-hour continuous dry-run test under simulated cutting loads, monitoring thermal stability, spindle temperature rise, and electrical current draw prior to crating.

Custom Manufacturing Process & Flexibility

Requirement Analysis: Evaluation of customer part drawings, material hardness (BHN/HRC), target tolerance limits, and cycle time requirements.

Engineering & Configuration: Custom matching of hydraulic chucks, pneumatic collets, rear clamping devices, and specialized steady rests tailored to non-standard workpiece geometries.

Machining & Assembly: Bed casting finish-milling on large gantry machining centers, precision grinding of guideways, and clean-room assembly of headstock sub-assemblies.

Factory Acceptance Test (FAT): Execution of test cuts on customer-supplied raw material samples, verifying tool life and surface finish prior to sign-off.

Crate & Shipment: Vacuum-sealed moisture barrier wrapping, desiccant packing, and steel-reinforced wooden crating compliant with ISPM 15 standards for international maritime transport.

Technical Support & After-Sales Service

01.

Installation & Commissioning:

Optional on-site commissioning by factory-trained service engineers for leveling, geometric alignment, and electrical integration.

02.

Operator Training:

Comprehensive on-site programming and maintenance training covering G-code troubleshooting, parameter backup, and routine preventive maintenance.

03.

Spare Parts Availability:

Critical wear components (hydraulic valves, proximity switches, belts, bearings, and wiper seals) maintained in regional inventories for immediate dispatch.

04.

Remote Diagnostic Support:

Ethernet/Wi-Fi connection ports on CNC control panels allow remote fault diagnosis and ladder diagram analysis by our senior applications engineering team.

FAQ

Q: What is the primary operational advantage of a flat bed CNC lathe compared to a slant bed lathe for heavy job-shop applications?

A: Flat bed lathes offer a larger swing diameter relative to floor space and superior mass distribution to absorb high-impact forces during deep roughing cuts. They also allow easier manual adjustment and setup flexibility when switching between diverse single-part jobs, making them ideal for custom job shops and repair facilities.

Q: Can the machine be configured with custom spindle bores to accommodate large-diameter oilfield pipes?

A: Yes. Standard spindle bores range from 52 mm to 130 mm, but we offer heavy-duty configurations with oversized spindle bores up to 200 mm to 300 mm, paired with dual chucks (front and rear) for secure clamping of long pipes.

Q: What CNC control systems are supported as standard, and can proprietary post-processors be integrated?

A: Fanuc 0i-TF and Siemens 828D/840D are supplied as standard due to their global availability of spare parts and technician familiarity. Both controllers support standard ISO G-code programming and integrate smoothly with mainstream CAD/CAM software (Mastercam, Siemens NX).

Q: How is thermal growth managed during continuous heavy-metal removal operations?

A: Thermal management relies on ribbed Meehanite casting stability, precision ground pre-tensioned ballscrews that counteract thermal elongation, and an independent spindle lubrication cooling circuit that prevents heat buildup in the headstock bearing housing.

Request a Quote

To receive a detailed technical proposal and commercial quotation tailored to your workpiece requirements, please provide the following details to our engineering team:
Part drawings or maximum component dimensions (Diameter & Length)
Material type and hardness (e.g., 4140 steel, cast iron, stainless steel)
Required production batch size or cycle time expectations
Preferred CNC control system (Fanuc / Siemens) and special tooling needs

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