Waldrich Coburg Profimill 7500
Key Specifications
X Travel
Y Travel
Z Travel
Spindle Taper
Accuracy
portal width
Overview
The Waldrich Coburg Profimill 7500 is a large portal milling and machining center built for the precision machining of heavy workpieces including printing press rolls, paper machine rolls, turbine generator frames, large structural components, and mold and die tooling. Waldrich Coburg, part of the Beijing No. 1 Machine Tool Group (BYJC) since 2005 but retaining its German engineering and manufacturing heritage in Coburg, Bavaria, is one of the world's foremost specialists in large gantry milling and roll turning centers.
The Profimill 7500 designation indicates a 7,500 mm (295 in) distance between columns — the crossrail opening that defines maximum workpiece width. This large portal width, combined with unlimited longitudinal travel in X on floor-mounted linear guideways, enables machining of paper machine suction rolls, printing press cylinders, and other workpieces of extraordinary width that cannot be accommodated on any other machine type. The crossrail supports one or two independent milling heads traveling in Y and Z, with each head capable of independent CNC operation.
Spindle options include a main milling head with up to 70 kW (93.9 HP) at speeds from 2 to 2,000 RPM for heavy roll milling, and a high-speed milling head with up to 6,000 RPM for structural and finish milling work on frames and die surfaces. Tool interfaces include ISO 50 and HSK-A100 depending on spindle selection. The Profimill 7500 is controlled via a Siemens SINUMERIK 840D sl with Waldrich Coburg's proprietary roll machining cycles for profile grinding preparation, crown milling, and taper turning on rolls. Positioning accuracy is ±0.008 mm (±0.00031 in) across the full 7,500 mm portal width.
The Waldrich Coburg Profimill 7500 is a capital-intensive, application-specific machine typically priced from $4,000,000 to $10,000,000 depending on X-axis length, spindle configuration, and automation options.
Full Specifications
| Parameter | Value |
|---|---|
| Portal Width | 7,500 mm (295.3 in) between columns |
| X-Axis Travel | Customer-configurable, typically 8,000 - 20,000 mm |
| Y-Axis Travel | 4,000 mm (157.5 in) |
| Z-Axis Travel | 1,500 mm (59.1 in) per head |
| Spindle Power Main | 70 kW (93.9 HP) |
| Spindle Speed Main | 2 - 2,000 RPM |
| Spindle Speed Highspeed | 6,000 RPM (optional high-speed head) |
| Spindle Taper | ISO 50 or HSK-A100 |
| Positioning Accuracy | ±0.008 mm (±0.00031 in) |
| Max Workpiece Weight | 200,000 kg (441,000 lb) on floor table |
| Independent Heads | 1 or 2 independent CNC milling heads on crossrail |
| CNC Control | Siemens SINUMERIK 840D sl |
Strengths & Limitations
Strengths
- 7,500 mm between-column portal width accommodates paper machine rolls, printing press cylinders, and industrial roll components that no other machine type can machine in one setup
- 70 kW main spindle power enables sustained heavy milling passes on large cast iron and steel roll faces at removal rates and depths of cut impossible on lighter machines
- Dual independent head option allows simultaneous machining by two separate spindles on different workpiece zones, significantly reducing cycle time on large rolls and frames
- Waldrich Coburg's proprietary roll machining cycles for crown grinding, taper preparation, and profile milling are optimized for paper, printing, and steel rolling mill applications
Limitations
- Machine price of $4M-$10M places the Profimill 7500 firmly in the category of major capital investments accessible only to large industrial manufacturers and specialized job shops
- The 7,500 mm portal width is highly specialized — shops not regularly machining paper rolls, industrial rolls, or comparable large-width workpieces will find the capability largely unused
- Site requirements are extensive: deep foundations, heavy crane infrastructure, and large enclosure add significant civil engineering cost before the machine operates
Best For
Frequently Asked Questions
01
The 7,500 mm between-column distance defines the maximum workpiece width the gantry can straddle. Paper machine rolls and printing press cylinders used in wide-format industrial machines can reach 6,000-7,000 mm in face length. No conventional machining center or turning center can accommodate workpieces of this width — only a portal gantry machine with sufficient span can machine the full roll face in a single setup without repositioning.
02
Waldrich Coburg has developed proprietary CNC cycles for roll machining including crown milling (applying a controlled convex or concave profile along the roll length), taper preparation, and face groove machining. These cycles are integrated into the Siemens 840D sl control and allow the operator to define roll specifications — crown value, taper angle, groove pitch — directly in the control without complex CAM programming. The machine's two independent heads can perform simultaneous roll facing and end machining to reduce total cycle time.
03
Waldrich Coburg was acquired by Beijing No. 1 Machine Tool Group (BYJC) in 2005. The machine continues to be designed and manufactured in Coburg, Germany with the original German engineering team and quality standards maintained. BYJC's ownership provides Waldrich Coburg with access to the Chinese heavy industry market, which is a significant growth area for large portal milling machines. German customers and Western buyers deal with Waldrich Coburg GmbH in Coburg, with full German technical support.
04
Yes. Waldrich Coburg offers a high-speed milling head option (up to 6,000 RPM) for the Profimill 7500 alongside the standard heavy-duty roll milling head. With the high-speed head installed, the machine can perform precision face milling, pocket milling, and boring on large steel and cast iron structural components such as press frames, machine tool beds, and turbine generator frames. Many customers configure the machine with both head types for maximum flexibility.
05
The maximum roll length (X-axis travel) is customer-configurable and not fixed by the machine model number. Typical installations provide 8,000 to 20,000 mm of X-axis floor guideway travel, accommodating rolls from 4,000 mm to 18,000 mm in body length plus setup allowance. Very long custom installations for specific industrial roll programs have been built to 25,000 mm and beyond. Customers specify X-axis length at order time based on the maximum roll length in their production program.
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