TBRMHSK40A SCHUNK Polygonal tools chuck TRIBOS-RM with HSK40A shanks DIN ISO 12164-1 for HSC machining, clamping diameter of your choise
(Incl. Tax: €508.74)
The SCHUNK TRIBOS-RM HSK-A 40 polygonal toolholder is 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. With DIN 69893 interface, G2.5 balancing and compatibility with h6 tool shanks, it is ideal for precision machining on highly dynamic machining centers.
SCHUNK TRIBOS-RM HSK-A 40 polygonal toolholders are designed for high-speed micro-machining applications where run-out accuracy, radial rigidity and dynamic stability are critical for process performance. The HSK-A interface according to DIN 69893 ensures a rigid and precise connection between spindle and machine, making this solution ideal for highly dynamic machining centers.
The 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 to allow tool insertion. Once the pressure is released, the holder returns to its original geometry, clamping the tool shank uniformly and without backlash. This principle allows achieving a run-out below 0.003 mm at 2.5 x D, ensuring high precision and repeatability over time.
The anchor structure combined with a compact and robust design provides high radial rigidity, essential for finishing operations and micro-machining of small diameters. The system is suitable for high rotational speeds up to 85,000 rpm, with standard balancing G2.5 at 25,000 rpm (Umax < 1 gmm) ensuring stable and vibration-free operation.
The holders are designed for h6 tool shanks and feature an axial adjustment screw for precise tool length presetting. The absence of threaded connections for coolant transfer tubes helps maintain a compact geometry optimized for high-speed applications.
Compared to the HSK-A 32 version, the HSK-A 40 offers increased mass and structural stability, making it suitable for more demanding machining operations while maintaining high precision, surface quality and process reliability.
TRIBOS-RM HSK-A 40 – Dimensional technical data
| Size [mm]/[inch] | D₂ [mm] | L [mm] | L₂ [mm] | L₄ [mm] | Mmin [Nm] | Weight [kg] |
|---|---|---|---|---|---|---|
| 3 | 20 | 50 | 30 | 3 | 0.41 | |
| 4 | 20 | 50 | 32 | 30 | 4 | 0.41 |
| 5 | 20 | 50 | 32 | 30 | 5 | 0.41 |
| 6 | 20 | 50 | 32 | 30 | 10 | 0.41 |
| 8 | 20 | 50 | 32 | 30 | 15 | 0.41 |
| 10 | 20 | 50 | 32 | 30 | 20 | 0.41 |
| 12 | 20 | 50 | 32 | 30 | 20 | 0.41 |
| 1/8" | 20 | 50 | 30 | 3 | 0.41 |
TRIBOS-RM HSK-A 40 – 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 | Chip seat bores compliant with DIN 69873 |
| Toolholder replacement | For automatic toolholder replacement |
| Coolant supply | Without thread for coolant transfer tube |
| Axial adjustment screw | Without axial length adjustment screw |
| 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 HSK-A 40 – Technology and operating principle
| 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. |
| 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:
- HSK40A
