Used EWAG WS11 Universal Grinding Machine: Technical Excellence and Precision Analysis
Author：JINYI Date：2026-02-21
| Specification | Value |
| Stock Number | 10292 |
| Brand | EWAG (Switzerland) |
| Model | WS11 |
| Motor Power | 0.3 KW |
| X-Axis Stroke | 100 mm |
| Y-Axis Stroke | 100 mm |
| Z-Axis Range | 100 mm |
| Variable Speed Range | 100 – 1000 t/min |
| Infeed Operation (Z-Axis) | 4E Drive |
| Cross Feed Drive (X-Axis) | 4Q-M Drive |
| Grinding Stroke Drive (Y-Axis) | 3H Drive |
| Workhead A-Axis Adjustment | -135° / +30° |
| Workhead Inclination | +/- 15° |
| Workhead Spindle Speed | 100 - 1300 min-1 |
1. Equipment Overview: The Swiss Standard of Micro-Grinding
The EWAG WS11 is a name synonymous with uncompromising precision in the world of tool and cutter grinders. Manufactured in Switzerland, this machine has long been the gold standard for the production and regrinding of micro-tools. Stock number 10292 represents an excellent opportunity for manufacturers to acquire this legendary capability in the used market.
What sets the WS11 apart is its unique mechanical philosophy. Instead of relying on brute force, it focuses on absolute geometric control and thermal stability. With a compact 0.3KW motor, it is designed to handle delicate operations where even the slightest vibration could ruin a workpiece. The WS11 is particularly favored for working with tungsten carbide and other hard materials that require surgical precision during the grinding process.
2. Technical Parameter Analysis: Unveiling the Machine's DNA
Kinematic Precision Across Three Axes
The WS11 features a balanced 100mm stroke in the X, Y, and Z axes. This symmetry allows for a highly intuitive setup process. The machine is equipped with specialized drive systems: the 4E for Z-axis infeed, the 4Q-M for X-axis cross-feed, and the 3H for the Y-axis grinding stroke. These are not standard mechanical movements; they are engineered to provide a silky-smooth tactile response, allowing the operator to feel the grinding engagement at a micron level.
The Universal Workhead
Perhaps the most impressive feature is the workhead's range of motion. With an A-axis adjustment of -135° to +30° and a +/- 15° inclination, the WS11 can manipulate workpieces into nearly any imaginable orientation. The workhead spindle speed, ranging from 100 to 1300 min-1, allows for the use of various grinding wheel diameters and materials, ensuring that surface finish and edge integrity are maintained across different applications.
3. Application Case Studies: Where the WS11 Shines
The WS11 is found in environments where "good enough" is never enough. In the horological (watchmaking) industry, it is used to sharpen the tiny tools that create watch gears and escapements. In medical technology, it produces specialized surgical drills and cutters used in minimally invasive procedures.
Furthermore, in the aerospace and electronics sectors, the WS11 is used for regrinding high-performance carbide end mills and PCB drills. The ability to maintain precise rake and clearance angles on tools as small as 0.1mm in diameter makes it an essential asset for micro-machining labs. The continuous variable speed of 100 – 1000 t/min ensures that even with small diameter wheels, the optimal cutting speed is achieved without inducing thermal stress on the tool.
4. Value Proposition: Why Invest in a Used WS11?
Purchasing a used EWAG WS11 is a strategic move for any precision workshop. New Swiss machinery of this caliber carries a premium price tag that often requires years to amortize. A pre-owned WS11 offers the same mechanical geometry and precision at a significantly lower entry cost, providing a much faster return on investment (ROI). Additionally, because EWAG machines are legendary for their durability, a well-maintained unit like this one retains its resale value remarkably well, serving as both a production tool and a stable capital asset.
5. Frequently Asked Questions (FAQ)
Q1: What is the power requirement for the WS11?
A1: The WS11 typically runs on standard industrial 3-phase power, with a very low consumption profile due to its 0.3KW motor design.
Q2: Can this machine be upgraded with a digital readout (DRO)?
A2: Yes, many workshops retrofit WS11 machines with high-resolution DROs on the X and Y axes to improve measurement speed and reduce operator error.
Q3: What types of collets does the workhead use?
A3: The WS11 standard workhead typically uses Schaublin W20 collets, which are widely available and extremely precise.
Q4: Is the machine suitable for grinding PCD tools?
A4: While primarily a manual machine, with the correct diamond wheels and a skilled operator, it can certainly be used for the fine finishing of Polycrystalline Diamond (PCD) inserts.
Q5: How do I handle transportation of such a precise machine?
A5: It is critical to lock all axes and the workhead before shipping. The machine should be crated and handled by specialized industrial riggers to avoid any shock to the precision bearings.
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