CK6140H/750-Yunji Machine Tool

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Product Description

　　Spindle Structure

　　The spindle is equipped with precision bearings specially designed for machine tool spindles, featuring an “NN+BTM front-end and NN rear-end” configuration. This typical heavy-cutting, heavy-load spindle design delivers high rigidity, excellent precision, superior resistance to intermittent cutting and impact, and exceptional durability, making it highly regarded and widely adopted in the lathe industry.

　　Feed mechanism

　　The X-axis skateboard is guided by dovetail guideways, with shims used to adjust for wear; the Z-axis employs a combination of crowned and flat guideways, balancing load-carrying capacity and guiding accuracy. Through precision machining and manual lapping, stringent requirements for positioning accuracy, fit-up, and motion performance are met. With precise transmission, accurate feed control, thorough lubrication, and robust protection, the system achieves micrometer-level coordinated feed accuracy and delivers long-term, stable, and reliable operation.

　　Machine tool features:

　　1. The CK6140H is suitable for high-speed machining of parts made of copper, aluminum, and other materials that require a high surface finish.

　　2. The machine tool features high rigidity, minimal thermal deformation, low spindle temperature rise, low vibration, and the ability to withstand high cutting torques, making it well-suited for heavy-duty cutting operations.

　　3. Key purchased components of the machine tool, such as the CNC system and spindle bearings, are sourced from well-known domestic and international manufacturers, thereby ensuring high reliability.

　　4. Excellent workpiece consistency, with stable attainment of IT6 accuracy.

　　5. The machining of critical components such as the machine bed, spindle box, saddle, and tailstock is performed using state-of-the-art equipment, ensuring the high precision of the machine tool parts.

　　6. The machine tool features a modular design, allowing for a variety of configurations to be customized according to customer requirements.

　　Technical Specifications for CK6140H/750

Scope of Work
Project	Unit	Specifications	Remarks
Maximum turning diameter of the bed	mm	φ420
Maximum turning diameter on the skateboard	mm	φ210
Maximum distance between two peaks	mm	750
×Maximum travel in the horizontal direction	mm	220
Maximum travel in the Z (vertical) direction	mm	750
Bed guideway width	mm	340	Plastic-coated bed Anshan-type guide rail
Bed Structure	type	Integral bed legs
×/Z-axis servo motor torque	Name	6/10	Increase the Z-axis servo motor
×/Z-axis rapid traverse speed	m/min	6/8
×Z-axis ball screw specifications	mm	2505/3210
Spindle
Spindle head type	type	A2-6
Spindle bore	mm	φ56
Spindle bore taper	MT	MT6 (1:20)
Spindle speed	r/rpm	2000	Independent spindle, stepless speed variation
Chuck	inch	Manual three-jaw chuck φ200	Optional manual three-jaw chuck, φ250
Tailstock
Tailstock sleeve diameter	mm	φ65
Tailstock sleeve bore taper	MT	4#
Maximum stroke of the tailstock sleeve	mm	150
Accuracy Standards – (GB/T 25659.1-2010 “Accuracy Testing of CNC Horizontal Lathes”)
Processing accuracy	mm	IT6-IT7
Workpiece roundness machining	mm	≤0.008
Workpiece cylindricity/length processing	mm	≤0.02/300
Workpiece flatness/diameter machining	mm	≤0.025/Φ300	Only allowed to be cool.
Surface roughness of machined workpieces	micrometer	≤Ra3.2
X-axis/Z-axis repeat positioning accuracy	mm	X-axis ≤ 0.01 / Z-axis ≤ 0.015
Electrical System
Main motor power	keyword	5.5 kW servo motor	Optional 7.5 kW servo motor
Tool holder	type	Vertical Four-Station Electric Tool Post
Tool cross-section	mm	25×25
Voltage	V	AC 380
Voltage fluctuation range	V	-10% to +10%
Frequency	Hertz	50±2
Total power capacity	KVA	20
General Specifications
Machine tool external dimensions	mm	2200 (length) × 1400 (width) × 1700 (height)
Package external dimensions	mm	2300 (length) × 1580 (width) × 1900 (height)
Net weight	kilogram	1800kg
Total weight (including packaging box)	kilogram	2000kg
Based on: GB/T 25659.1-2010 standard

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