TRBHSK25E SCHUNK Polygonal tool chucks TRIBOS-S with HSK25E shank DIN ISO 12164-1 for machining in small footprint, clamping diameter of your choice
(Incl. Tax: €390.58)
SCHUNK TRIBOS-S HSK-E25 polygonal toolholders for high-speed spindle applications and ultra-precision machining. Backlash-free clamping through elastic deformation with run-out < 0.003 mm. Compatible with h6 shank tools, balanced G2.5 at 25,000 rpm and usable up to 85,000 rpm. Compact design and high dynamic stability.
SCHUNK TRIBOS-S HSK-E25 polygonal toolholders are designed for ultra-high-speed and precision applications, particularly for high-speed spindles and compact machining systems where balance, run-out accuracy and low weight are critical.
The clamping system is based on controlled elastic deformation of the polygonal bore. Using TRIBOS SVP devices, the internal profile is temporarily transformed into a circular shape to allow tool insertion. Once pressure is released, the holders return to their original geometry, ensuring uniform, backlash-free clamping.
This technology eliminates mechanical wear components, reducing cumulative tolerances and achieving run-out below 0.003 mm at 2.5 x D with excellent repeatability. The toolholders are designed for h6 shank tools, ensuring stability even at very high speeds.
Their extremely compact and lightweight design makes them ideal for high-speed spindles, reducing rotating mass and improving dynamic stability. The slim design also allows machining in confined spaces and complex geometries.
They feature axial length adjustment for precise tool presetting. The simplified design without complex coolant systems supports optimized performance at high speeds.
The HSK-E25 interface is specifically designed for high-speed spindles, ensuring maximum precision and reduced vibration, making these toolholders ideal for micro-machining and finishing applications.
TRIBOS-S HSK-E 25 – Dimensional technical data
| Size | D₂ [mm] | D₃ [mm] | L [mm] | L₂ [mm] | L₄ [mm] | L₅ [mm] | L₆ [mm] | Mmin [Nm] | Weight [kg] |
|---|---|---|---|---|---|---|---|---|---|
| 6 | 9.9 | 13.1 | 50 | 38.5 | 35 | 35.6 | 40 | 5 | 0.15 |
| 8 | 13 | 15.1 | 50 | 38.5 | 35 | 36.8 | 40 | 12 | 0.15 |
| 10 | 16 | 18.1 | 55 | 43.5 | 40 | 43.6 | 45 | 20 | 0.16 |
TRIBOS-S HSK-E 25 – Technical features and benefits
| Version | Ideal for chip-removal machining operations – radial forces must be taken into account. Rotationally symmetrical design. |
| 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 |
| Toolholder replacement | For automatic toolholder replacement |
| Coolant supply | Without thread for connecting coolant transfer tubes |
| Axial adjustment screw | Without axial length adjustment screw |
| Axial length adjustment | Length adjustment within a precision range of 0.01 mm, with 10 mm adjustment travel |
| Extremely slim design | Precise machining operations, even at workpiece points that are difficult to reach |
| High flexibility | Clamping different diameters thanks to the use of grooved or sealed intermediate sleeves |
| Lightweight design | Fast feed and speed range up to 85,000 rpm (HSC) |
| Constant run-out and repeatability accuracy | < 0.003 mm |
| Total compatibility | Ideally combinable with TENDO SVL and TRIBOS SVL extensions |
| 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 |
| Standard fine balancing | Suitable for high speeds with a balancing grade of G2.5 at 25,000 rpm |
| Symmetrical rotation design | The rotationally symmetrical structure minimizes the interference contour and ensures a high rotational speed |
TRIBOS-S HSK-E 25 – Technology and operating principle
| Product description | Extremely slim polygonal toolholders. Precision for machining conditions in extremely confined spaces. When some workpiece areas are very difficult to reach or common clamping systems reach their limits, the solution is represented by TRIBOS-S polygonal clamping holders with their extremely slim structure. Maximum constant concentricity and repeatability accuracy < 0.003 mm ensure even more uniform cutting edge action, improving tool life by more than four times. |
| 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 | Axial adjustment screw – For easy and fast tool presetting |
| Element 2 | Base body – The machine-side interface is located on the base body |
| Step 1 | Polygonal clamping diameter – By means of TRIBOS SVP devices and the application of the respective 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 locked reliably with high repeatability accuracy. |
- Brand:
- SCHUNK
- Typology:
- Polygonal closure
- Shank Type:
- HSK25E
