YJ-52DW-Yunji Machine Tool

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Product Description

　　Feature One

　　Feature Two

　　The feed system employs either high-precision ball screws with direct-drive coupling, or slide surfaces with plastic coating, or linear guideways, thereby eliminating stick-slip and significantly enhancing machining accuracy, wear resistance of moving components, and impact resistance; this ensures long-term maintenance of guideway accuracy and extends the machine tool’s service life.

　　Feature Three

　　After the spindle unit is assembled with the chuck and hydraulic cylinder, it undergoes online dynamic balancing using a dual-channel balancer followed by counterweighting, which significantly enhances the spindle’s dynamic accuracy and durability. The machine tool assembly process is meticulously executed, and the kinematic components are precision-adjusted using laser interferometers and ball-bar instruments, resulting in mechanical accuracy that far exceeds national standards.

　　Feature Four

　　When a direct-mount spindle in a box-type design is employed, extremely high precision is required for all components, and the spindle features an NN+BTM—NN heavy-cutting configuration that delivers exceptional rigidity, superior accuracy, outstanding vibration and shock resistance, and excellent crash tolerance, making it capable of handling virtually all roughing and finishing operations!

　　Technical Specifications

Project	Unit	CK400L	YJ-52DW (line rail)	YJ-75DW (line rail)	YJ-400Y (Hard rail)	YJ-500Y (Hard rail)
Maximum turning diameter of the bed	mm	420	460	560	460	500
Maximum machining length	mm	400	390	500	400	600
Maximum travel of X/Z axes	mm	240/420	240/420	230/610	245/420	260/630
Rapid traverse on the X/Z axes	m/min	15/15	15/15	15/15	December 12	December 12
Main motor power	keyword	7.5	7.5/11	November 15	November 15	15/18.5
Maximum spindle speed	revolutions per minute	3000	3000	2500	3000	2500
Spindle head type		A2-6	A2-6	A2-8	A2-6	A2-8
Spindle through-hole and internal taper	Inch	66/1:20	66/1:20	87/1:20	61/1:20	82/1:20
Chuck specifications (hydraulic hollow)		8	8	10	8	10
Hydraulic turret center height	mm	80	80	100	80	100
Number of hydraulic turret stations		12	12	12	12	12
Tailstock Diameter/Taper Bore		60/4#	65/MT4#	80/MT5#	75/MT4#	80/MT5#
Sleeve stroke	mm	80	80	80	80	80
X/Z-axis positioning accuracy	mm	≤0.008	≤0.008	≤0.008	≤0.008	≤0.008
Repeatability of X/Z-axis positioning	mm	≤0.004	≤0.004	≤0.004	≤0.004	≤0.004
Surface roughness	micrometer	Ra ≤ 1.6	Ra ≤ 1.6	Ra ≤ 1.6	Ra ≤ 1.6	Ra ≤ 1.6
Machine tool external dimensions	m	2.31.651.65	2.51.61.8	2.81.71.8	2.41.71.9	2.91.81.9
Overall weight	kilogram	3000	3200	3700	3300	4200

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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 offers high rigidity, excellent precision, superior resistance to intermittent cutting and impact, and exceptional durability, making it highly acclaimed and widely adopted in the lathe industry.

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YJ-LW Series

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YJ-VL Series

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CK-400L

The feed system employs either high-precision ball screws with direct-drive coupling, or slide surfaces with plastic coating, or linear guideways, thereby eliminating stick-slip and significantly enhancing positioning accuracy, wear resistance of moving components, and impact resistance. This ensures long-term maintenance of guideway accuracy and extends the machine tool’s service life.

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Yanhe CNC Industrial Park, Hongta District, Yuxi City, Yunnan Province

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