Röders Tec RPX 400 CNC Gantry HSC High-Speed Vertical Machining Center – Year 2018
Make: Röders
Model: RPX 400
Year: 2018
Serial no.: 14591-179
Machine type: Gantry machining center / HSC high-speed milling machine, incl. cooling unit
Axes: 3-axis
Spindle / Tool interface:
• Tool holder: HSK E25 (ISO)
• Max. tool diameter: Ø 4 mm
Worktable:
• Table size: 450 x 300 mm
• T-slots: 12 mm
• T-slot pitch: 50 mm
Workpiece capacity:
• Max. workpiece height: 330 mm
• Max. workpiece weight: 100 kg
Travels:
• X-axis: 410 mm
• Y-axis: 294 mm
• Z-axis: 210 mm
Feed rates:
• 0–60,000 mm/min
Tool changer:
• 18-position automatic tool changer
Features / Equipment:
• Ceramic bearings
• Chip separator and chip conveyor
• Includes Erowa ER-016841 UPC clamping chuck
Hours:
• Total hours (read): 54,119 h
• Cutting/milling time: 29,529 h
Weight: 3,200 kg
Electrical:
• 400 V
• 32 A
Overall dimensions: 2,515 x 1,930 x 2,080 mm
Röders Tec RPX 400 CNC Gantry HSC High-Speed Vertical Machining Center – Technical Evaluation (Year 2018)
1. Technical Evaluation Overview
The Röders Tec RPX 400 is a 3-axis gantry-type high-speed machining (HSC) center configured for precision milling with very small tools. Based strictly on the provided information, the machine uses an HSK E25 (ISO) tool interface with a maximum tool diameter of Ø 4 mm, clearly defining it as a fine-machining platform rather than a general-purpose milling center.
The working envelope consists of X/Y/Z travels of 410 / 294 / 210 mm and a table size of 450 × 300 mm. Workpiece limits are stated as 330 mm maximum height and 100 kg maximum weight. The table is equipped with 12 mm T-slots on a 50 mm pitch. Feed rates are specified up to 60,000 mm/min, consistent with high-speed milling applications.
The machine includes an 18-position automatic tool changer, ceramic bearings, a chip separator and chip conveyor, and an Erowa ER-016841 UPC clamping chuck. Electrical supply is 400 V / 32 A. Overall dimensions are 2,515 × 1,930 × 2,080 mm, with a machine weight of 3,200 kg.
Operating data indicates 54,119 total hours, of which 29,529 hours are recorded as cutting/milling time. No spindle speed value, spindle power, CNC control type, accuracy specifications, or thermal management details are provided and must be verified.
2. What to Check Before Buying
Considering the stated configuration and the significant operating hours, the following checks are technically relevant:
Mechanical and axis system:
Condition and accuracy of the gantry structure and linear axes across the full 410 / 294 / 210 mm travels.
Verification of axis smoothness, backlash, and repeatability, which are critical in HSC applications.
Inspection of the worktable surface, 12 mm T-slots, and the interface with the installed Erowa UPC system.
Spindle and tooling:
Condition of the HSK E25 spindle, with particular attention to bearing noise, vibration, and thermal behavior, despite the use of ceramic bearings.
Verification that the spindle and tool interface remain suitable for consistent operation with Ø 4 mm maximum tool diameter tools.
Confirmation of spindle speed range and power, which are not specified.
Tool changer and peripherals:
Functional testing of the 18-position tool changer for reliable indexing and repeatability.
Effectiveness and condition of the chip separator and chip conveyor systems.
CNC and electrical system:
Identification of the CNC control system, including software version, available options, and parameter backups.
Review of alarm history and inspection of electrical cabinets and power components suitable for 400 V / 32 A operation.
3. Typical Industrial Applications
Based strictly on the provided specifications, the RPX 400 is technically suitable for:
High-speed precision milling of small components requiring very fine tools and high feed rates.
Mold, electrode, micro-mechanical, or precision component machining within the Ø 4 mm tool diameter limitation.
Applications benefiting from standardized palletized workholding using Erowa UPC systems for repeatability.
Material types, achievable surface quality, and accuracy classes cannot be confirmed from the provided data.
4. Common Risks in Used Machines
For a used HSC gantry machining center of this type, typical risks include:
Spindle wear, particularly relevant given the high accumulated cutting time of 29,529 hours.
Loss of axis precision due to long-term high-speed operation.
Tool changer wear, affecting reliability in frequent tool change environments.
Documentation gaps, such as missing CNC backups, spindle service records, or electrical schematics.
5. Maintenance and Service Considerations
With no service history provided, maintenance considerations are limited to general technical aspects:
Continuous monitoring of spindle condition and cooling performance is essential in high-speed machines.
Regular inspection of linear guides, lubrication systems, and clamping interfaces is critical for maintaining precision.
CNC parameters and machine-specific data should be secured before operation.
Any maintenance or refurbishment planning should be based on an on-site inspection and functional testing rather than assumptions about service intervals or spare part availability.
