TBRMHSK25A SCHUNK Polygonal tools chuck TRIBOS-RM with HSK25A shanks DIN ISO 12164-1 for HSC machining, clamping diameter of your choise
(Incl. Tax: €523.38)
SCHUNK TRIBOS-RM polygonal toolholders are designed for high-speed micro-machining up to 85,000 rpm. Backlash-free clamping through elastic deformation ensures run-out < 0.003 mm at 2.5 x D, high radial rigidity and excellent repeatability. Suitable for h6 shank tools, they are ideal for fast and precise machining on highly dynamic compact machining centers.
SCHUNK TRIBOS-RM polygonal toolholders are designed for high-speed micro-machining applications where run-out accuracy, radial rigidity and compact design are critical for process quality. The analyzed images clearly show that this range is intended for applications up to 85,000 rpm, especially on highly dynamic compact machining centers.
The operating principle is based on controlled elastic deformation of the polygonal clamping bore. Using the dedicated TRIBOS SVP device, the internal profile is temporarily deformed to allow tool insertion. Once pressure is released, the holder returns to its original shape, clamping the tool shank uniformly and without backlash. This makes it possible to achieve constant run-out below 0.003 mm at 2.5 x D with high repeat accuracy.
Compared with standard polygonal toolholders, the TRIBOS-RM range stands out for its very stable construction, anchor structure and small compact design, developed to increase radial rigidity and ensure precise machining even with small tool diameters. Standard balancing of G2.5 at 25,000 rpm makes these holders suitable for the high speeds typical of micro-milling and finishing operations.
The toolholders are designed for h6 quality tool shanks and include an axial adjustment screw for fast and precise tool length presetting. The images also indicate a design without threaded connection for coolant transfer tubes, helping maintain a compact and optimized structure.
This range is therefore especially suitable for micro-machining, precision finishing, high-speed machining and applications requiring excellent surface quality, process reliability and repeatability.
TRIBOS-RM – Dimensional technical data
| Size [mm]/[inch] | D₂ [mm] | L [mm] | L₂ [mm] | L₄ [mm] | Mmin [Nm] | Weight [kg] |
|---|---|---|---|---|---|---|
| 3 | 20 | 40 | 31 | 30 | 3 | 0.12 |
| 4 | 20 | 40 | 31 | 30 | 4 | 0.12 |
| 6 | 20 | 40 | 31 | 30 | 10 | 0.12 |
| 8 | 20 | 40 | 31 | 30 | 15 | 0.12 |
| 10 | 20 | 40 | 31 | 30 | 20 | 0.12 |
| 1/8" | 20 | 40 | 31 | 30 | 3 | 0.12 |
TRIBOS-RM – Technical features and benefits
| 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 – 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 | Clamping diameter polygon-similar – By using the TRIBOS SVP clamping devices and the matching pressure actuation, the polygonal clamping diameter of the toolholder becomes round. |
| Step 2 | Clamping diameter becomes round – The tool shank is now easy to insert. |
| Step 3 | Inserting the tool shank – If the pressure on the clamping diameter eases off, then it will assume its polygonal shape again. |
| Step 4 | Tool clamped – The inserted tool shank is process-reliably clamped at a high repeat accuracy. |
- Brand:
- SCHUNK
- Typology:
- Polygonal closure
- Shank Type:
- HSK25A
