Rollomatic GrindSmart 625XF
Key Specifications
grinding axes
max tool diameter
max tool length
wheel pack capacity
grinding spindle power
grinding spindle speed
Overview
The Rollomatic GrindSmart 625XF is a 5-axis CNC tool grinding machine that delivers Rollomatic's core carbide tool grinding capability in a 5-axis configuration optimized for shops where the full 6-axis simultaneous architecture of the 628XW is more capability than the application requires. The '25' designation indicates a 25 mm maximum tool diameter, and the '5' indicates the 5 interpolated CNC axes. The XF suffix identifies the machine's standard wheel pack configuration without the extended 10-wheel pack of the XW variant.
For the majority of solid carbide end mill and drill geometries — standard 2- to 6-flute end mills, standard drill geometries, step drills, and reamers — 5-axis simultaneous grinding provides all the geometric freedom needed. The 6th axis becomes critical for complex undercut profiles, unusual approach angle requirements, and non-standard tool geometries that represent a minority of production tool grinding work. For shops whose product range falls within standard tool geometry families, the 625XF provides GrindSmart-quality grinding at a lower capital cost than the 628XW.
The 625XF shares the GrindSmart's core structural platform: polymer concrete machine base, direct-drive motorized grinding spindle, precision collet workholding, and Rollomatic's Virtual Grinding (VG) programming software. The 5-axis configuration uses three linear axes (X, Y, Z) and two rotary axes (A and C), all simultaneously interpolated by the Rollomatic CNC. Wheel pack capacity is typically 4-6 wheels, providing enough wheel variety for complete tool grinding cycles on standard tool types.
Workholding runout on the 625XF targets the same sub-2-micron specification as the 628XW — the difference in the two machines is axis count, not workholding quality. Cutting edge runout of 0.001-0.002 mm (1-2 microns) is achievable in production on the 625XF for standard tool types, which is sufficient for the vast majority of production carbide tooling applications.
Pricing for the GrindSmart 625XF falls in the $280,000-$400,000 range — the 5-axis platform with Rollomatic quality at a lower entry price than the 6-axis 628XW.
Full Specifications
| Parameter | Value |
|---|---|
| Grinding Axes | 5-axis simultaneous (X, Y, Z linear + A, C rotary) |
| Max Tool Diameter | 25 mm (0.98 in) |
| Max Tool Length | Up to 300 mm (11.8 in) |
| Wheel Pack Capacity | 4-6 wheels standard |
| Grinding Spindle Power | Up to 12 kW (16 HP) |
| Grinding Spindle Speed | Up to 12,000 RPM |
| Spindle Type | Direct-drive motorized spindle |
| Cutting Edge Runout | 0.001 - 0.002 mm (1-2 µm) in production |
| Machine Base | Polymer concrete |
| CNC Control | Rollomatic CNC with Virtual Grinding (VG) software |
| Coolant | Through-spindle and flood coolant, fine filtration |
| Workholding | Precision collet chuck |
| Automation | Robot cell compatible (optional) |
Specifications sourced from rollomatic.ch — verified 2026-03-28
Strengths & Limitations
Strengths
- 5-axis simultaneous grinding covers the vast majority of production solid carbide tool geometries — end mills, drills, reamers, step tools — without the 6th axis cost premium
- Same polymer concrete base, direct-drive spindle, and Virtual Grinding software as the 628XW — quality architecture at a lower entry price
- Sub-2-micron cutting edge runout in production is sufficient for all but the most demanding aerospace and medical applications
- Virtual Grinding software programming from geometry parameters — no manual G-code required — applies equally to the 625XF as to the larger GrindSmart machines
- 4-6 wheel pack accommodates complete carbide tool grinding cycles (roughing flute, finishing flute, gash, end geometry) without manual wheel changes
- 25 mm tool diameter capacity covers the most common production end mill and drill sizes in carbide tooling manufacture
Limitations
- 5-axis architecture cannot produce certain complex undercut geometries and non-standard approach angles that the 628XW's 6th axis enables — shops with complex custom tool requirements may outgrow the 625XF
- 25 mm maximum tool diameter is smaller than the 628XW's 28 mm — a modest difference but worth confirming against the product range before purchase
- Smaller wheel pack (4-6 vs. 10) may require manual wheel pack changeover for tool families that need more than 6 different wheel specifications
- Robot automation is available but requires integration engineering — turnkey robot loading systems are more expensive relative to machine cost on the 625XF than on higher-capacity production machines
Best For
Frequently Asked Questions
01
Choose the 625XF if your tool range consists primarily of standard carbide end mills, drills, and reamers with conventional geometries — 2- to 6-flute end mills, standard-geometry drills, and similar. The 5-axis architecture handles these applications fully, and you save $70,000-$100,000 versus the 628XW. Choose the 628XW if you produce tools with complex undercut profiles, specialized end geometries requiring unusual wheel approach angles, or non-standard tool types where the 6th axis is operationally necessary. If you are unsure, discuss your specific tool geometry range with Rollomatic's application engineering team — they can identify whether any of your tools require the 6th axis.
02
Yes. Rollomatic's Virtual Grinding software is the same platform across the GrindSmart family. The software automatically accounts for the machine's axis configuration — on a 5-axis machine it generates 5-axis programs; on a 6-axis machine it generates 6-axis programs. Tool geometry libraries, simulation, and the parameter-driven programming approach are identical. This means operators and programmers who learn VG on the 625XF can move to a 628XW without relearning the software environment.
03
For standard 4-flute end mills in the 6-25 mm diameter range, the cycle time difference between the 625XF and 628XW is minimal — both achieve similar material removal rates with equivalent wheel packs. The throughput advantage of the 628XW emerges when the 6th axis enables shorter, more direct grinding paths for complex geometries, and when the larger 10-wheel pack reduces wheel pack change frequency in multi-family production. For a shop grinding a single end mill family in one diameter range, the 625XF achieves essentially identical throughput at lower capital cost.
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