CNC LATHE

CK6140H/750

Machine Features

1.CK6140H is suitable for high-speed machining of copper, aluminum and other workpieces requiring superior surface roughness.

2.The machine tool features high rigidity, low thermal deformation, low spindle temperature rise, slight vibration and large cutting torque capacity, suitable for heavy-duty cutting.

3.Key outsourced components of the machine, such as CNC system and spindle bearings, adopt well-known domestic brands to ensure high reliability of the lathe.

4.Excellent consistency of machined workpieces, stably achieving IT6 accuracy class.

5.Critical parts including bed, headstock, saddle and tailstock are machined with high-precision equipment to guarantee the precision of machine components.

6.Adopting modular design, the machine can be supplied with various configurations according to customer requirements.

Applications

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Product Description

Spindle Structure

The spindle adopts special precision bearings for machine tools: NN+BTM at the front end and NN at the rear end. It is a typical heavy-cutting & heavy-load spindle structure featuring high rigidity and excellent accuracy. It resists interrupted cutting and collision, delivers long service life, and is highly recognized and widely adopted in the lathe industry.

Feed Structure

The X-axis cross slide is guided by dovetail guideways with gibs to compensate for wear. The Z-axis uses one V-type and one flat guideway, balancing load capacity and guiding accuracy. Precision machining plus manual scraping fitting achieves high requirements on accuracy, fit and motion performance. With precise transmission, accurate feed, sufficient lubrication and tight protection, it realizes μ-level simultaneous feed accuracy and long-term stable & reliable operation.

Technical Parameters

Working Range
Item	Unit	Specification	Remarks
Max. Swing over Bed	mm	φ420
Max. Swing over Cross Slide	mm	φ210
Distance Between Centers	mm	750
Max. X-axis (Cross) Travel	mm	220
Max. Z-axis (Longitudinal) Travel	mm	750
Bed Guideway Width	mm	340	Saddle with hardened V guideway and plastic lining
Bed Structure	type	Integrated Bed Leg
X/Z Servo Motor Torque	Nm	6/10	Upgraded Z-axis servo motor
X/Z Rapid Feed Rate	m/min	6/8
X/Z Ball Screw Specification	mm	2505/3210
Spindle
Spindle Nose Type	type	A2-6
Spindle Bore	mm	φ56
Spindle Inner Taper	MT	MT6 (1:20)
Spindle Speed	rpm	2000	Independent spindle, stepless speed change
Chuck	inch	Manual 3-jaw Chuck φ200	Optional: Manual 3-jaw Chuck φ250
Tailstock
Tailstock Quill Diameter	mm	φ65
Tailstock Quill Taper	MT	No.4
Max. Tailstock Quill Travel	mm	150
Accuracy Standard - (GB/T25659.1-2010 《Testing of Accuracy for CNC Horizontal Lathes》)
Machining Accuracy	mm	IT6-IT7
Workpiece Roundness	mm	≤0.008
Workpiece Cylindricity / Length	mm	≤0.02/300
Workpiece Flatness / Diameter	mm	≤0.025/Φ300	Concave only
Workpiece Surface Roughness	μm	≤Ra3.2
X-axis / Z-axis Repeat Positioning Accuracy	mm	X-axis≤0.01 / Z-axis≤0.015
Electrical System
Main Motor Power	kw	5.5kw Servo Motor	Optional:7.5kw Servo Motor
Tool Post	type	Vertical 4-position Electric Tool Post
Tool Shank Cross Section	mm	25×25
Voltage	V	AC 380
Voltage Fluctuation Range	V	-10～+10%
Frequency	Hz	50±2
Total Power Capacity	KVA	20
General Specifications
Machine Overall Dimension	mm	2200(L)×1400(W)×1700(H)
Packing Case Dimension	mm	2300(L)×1580(W)×1900(H)
Net Weight	kg	1800kg
Gross Weight (Including Packing Case)	kg	2000kg
Reference Standard: GB/T25659.1-2010