Hydraulic Precision
Runout accuracy is specified at ≤ 0.004 mm at 2.5 × D1 (max. 50 mm).


Hydraulic expansion chuck for CNC woodworking with 1/2 in · 12.7 mm tool diameter, SK30 interface, 56 mm gauge length, ≤ 0.004 mm at 2.5 × D1 (max. 50 mm), and G 2.5 at 25,000 rpm.
ETP HYDRO-GRIP COMPACT hydraulic expansion chuck with SK30 interface, internal coolant.
For compatible SK30 CNC woodworking systems and 1/2 in tool shanks within the manufacturer-specified h6 or h7 tolerance.
ETP Transmission 706573 is the 1/2 in SK30 variant of the ETP HYDRO-GRIP COMPACT hydraulic expansion chuck family. The verified ETP record specifies D1 12.7 mm, D2 22 mm, D3 43.5 mm, gauge length L1 56 mm, L2 36.9 mm, L3 18 mm, and 40 mm maximum tool insert depth.
This configuration is specified for 60-125 Nm transmittable torque, h6 or h7 tool shanks, runout accuracy of ≤ 0.004 mm at 2.5 × D1 (max. 50 mm), and balance degree G 2.5 at 25,000 rpm.
ETP specifies internal coolant for this variant. The HYDRO-GRIP COMPACT family is intended for CNC woodworking operations including semi-roughing, finishing, plunging, contour milling, drilling, reaming, tapping, and thread milling.


Technical Specifications
Runout accuracy is specified at ≤ 0.004 mm at 2.5 × D1 (max. 50 mm).
The verified 706573 configuration is specified at G 2.5 at 25,000 rpm.
A 56 mm gauge length and internal coolant are matched to the verified SK30 configuration.
Confirm the SK30 machine interface, 1/2 in tool-shank diameter, h6 or h7 tolerance, approved ETP operating procedure, coolant configuration, tool projection, and spindle limits. Do not substitute a different diameter or interface variant because the HYDRO-GRIP COMPACT family name is the same.
ETP Transmission 706573 combines the HYDRO-GRIP COMPACT hydraulic clamping system with a 1/2 in tool diameter, SK30 interface, 56 mm gauge length, and manufacturer-defined torque, runout, and balance specifications.
Exact variant verification matters because related ETP products can share a family name while differing in diameter, interface, torque, dimensions, and numeric product identifier.