TBRMSK SCHUNK Polygonal tools chuck TRIBOS-RM with SK30 shank DIN ISO 7388-1 AD for HSC machining, clamping diameter of your choice
(Incl. Tax: €557.54)
The TRIBOS-RM polygonal chuck is designed for ultra-precise HSC machining in the field of micro-cutting, reaching speeds of over 85,000 rpm. Its anchoring structure ensures rigidity and stability, while a run-out of ≤ 0.003 mm guarantees surface quality and process reliability in metal cutting applications. Available in various sizes, it integrates perfectly into compact, dynamic machining centers, featuring SK30 DIN ISO 7388-1 AD shank, G2.5 balancing grade, and h6 tool shank.
The SCHUNK TRIBOS-RM SK 30 polygonal toolholder is designed for high-speed machining and precision micro-machining applications requiring maximum concentricity, dynamic stability and reliable clamping. The SK 30 interface according to DIN ISO 7388 (DIN 69871) ensures a rigid and secure connection with the machine spindle.
The TRIBOS clamping system is based on controlled elastic deformation of the internal polygonal profile. Using the TRIBOS SVP device, the clamping diameter is temporarily transformed into a circular shape for tool insertion. Once the pressure is released, the holder returns to its original polygonal geometry, clamping the tool shank uniformly and without backlash. This principle enables extremely high run-out accuracy of < 0.003 mm at 2.5 x D, ensuring excellent repeatability and surface quality.
The compact design and symmetric rotation structure provide stable performance at high speeds up to 85,000 rpm, with standard balancing G2.5 at 25,000 rpm (Umax < 1 gmm). The toolholder is designed for h6 tool shanks, ensuring high radial rigidity and reduced vibration.
Unlike HSK-E versions, this model features internal coolant supply according to ISO 7388 AD, allowing direct coolant delivery to the cutting zone, improving chip evacuation and thermal stability.
The toolholder is also prepared for an optional data chip seat and does not include axial length adjustment screws, maintaining a robust and simple design.
This configuration is ideal for precision machining, high-speed milling, micro-machining and HSC applications on SK interface machines.
TRIBOS-RM SK 30 – Dimensional technical data
| Size | D₂ [mm] | D₃ [mm] | L [mm] | L₄ [mm] | L₅ [mm] | Mmin [Nm] | Weight [kg] |
|---|---|---|---|---|---|---|---|
| 6 | 20 | 22 | 65 | 30 | 45.9 | 10 | 0.35 |
| 8 | 20 | 22 | 65 | 30 | 45.9 | 13 | 0.35 |
| 10 | 20 | 22 | 65 | 30 | 45.9 | 17 | 0.35 |
| 12 | 20 | 22 | 65 | 30 | 45.9 | 20 | 0.35 |
TRIBOS-RM SK 30 – Technical features and benefits
| Version | Very stable design for fast and precise machining |
| Run-out accuracy | < 0.003 mm at 2.5 x D |
| Balancing grade | G2.5 at 25,000 rpm or Umax < 1 gmm |
| Tool shank quality | h6 |
| Data support | Optional chip seat bore |
| Toolholder replacement | For automatic toolholder replacement |
| Coolant supply | Internal coolant supply in accordance with ISO 7388 AD |
| Axial adjustment screw | Without axial length adjustment screw |
| Product description | TRIBOS-RM is suitable for high-speed micromachining operations up to 85,000 rpm. Extremely high concentricity accuracy ≤ 0.003 mm and the rigidity provided by the anchor structure form the basis of these compact toolholder connections and guarantee precision and process reliability during machining. The various sizes are perfectly suited to small highly dynamic machining centers. |
| High radial rigidity | Stability at high cutting forces, good machining performance and therefore faster machining times and higher productivity |
| Small and compact design | Precise and reliable machining |
| Standard fine balancing | Suitable for high speeds with a balancing grade of G2.5 at 25,000 rpm |
| Total compatibility | Ideally combinable with TRIBOS SVL tool extensions |
| Constant concentricity and repeatability accuracy | ≤ 0.003 mm |
| Reduced machine setup times and costs | Fast and easy tool change with the TRIBOS-RM SVP clamping device |
| Excellent vibration damping | Micro blowholes are avoided and better workpiece surfaces are achieved, the machine spindle is protected, tool life is extended and therefore costs are reduced |
| Symmetrical rotation design | The rotationally symmetrical structure minimizes the interference contour and ensures a high rotational speed |
TRIBOS-RM SK 30 – Technology and operating principle
| Technology | TRIBOS SVP actuation devices deform the polygonal shape of the toolholder until it becomes circular, making tool insertion possible. When pressure is released, the toolholder returns to its original polygonal shape, securely and precisely locking the inserted tool shank. |
| Element 1 | Anchor structure – The anchor structure ensures high stability |
| Element 2 | Base body – The machine-side interface is located on the base body |
| Element 3 | Compact design – For high radial rigidity and high run-out accuracy |
| Step 1 | Polygonal clamping diameter – By using the TRIBOS SVP clamping devices and the corresponding actuation pressure, the polygonal clamping diameter of the toolholder deforms and becomes circular. |
| Step 2 | The polygonal clamping diameter takes on a circular shape through actuation pressure, thus facilitating insertion of the tool shank. |
| Step 3 | Insertion of the tool shank – When the pressure exerted on the clamping diameter is reduced, it resumes its original polygonal shape. |
| Step 4 | Tool clamped – The inserted tool shank is clamped reliably with high repeatability accuracy. |
- Brand:
- SCHUNK
- Typology:
- Polygonal closure
