Smart cooling channel guidance: A new feature for MAPAL’s UNIQ hydraulic chuck

UNIQ DirectCool: Decentralised cooling for maximum effect

With the DirectCool option for the UNIQ hydraulic chuck range, MAPAL launched a future-forward solution that takes cooling and the process reliability of machining to a new level. The technology addresses the requirements of modern machining processes and is cost-effective, technically refined and easy to integrate.

The UNIQ range of hydraulic chucks was introduced by MAPAL in 2020 and continually expanded ever since. The UNIQ DReaM Chucks for boring and reaming applications and UNIQ Mill Chucks for milling operations are established on the market with a large customer base.

A key feature was recently added to the UNIQ portfolio in the form of the DirectCool option. DirectCool is a decentralised cooling system that enables precise cooling along the tool shaft to the cutting edge through three cooling channel bores. This allows the hydraulic chucks to achieve even temperature distribution, reduce wear and thermal distortion, significantly increase tool life, and enable consistent machining quality. At the same time, the flushing effect improves process reliability and surface quality, as chips are removed effectively. DirectCool supplies reliable cooling and prevents tool breakage, particularly in boring processes where chips can wind around the tool.

The UNIQ hydraulic chucks have unlimited compatibility. DirectCool integration does not alter tool restriction, so existing processes can be continued without adjustments. Cost-efficiency and flexibility are also assured, as no expensive shank grooves are required and standard tools and/or tools without internal cooling can be used.

UNIQ DirectCool is already producing promising results, particularly in stainless steel and aluminium machining. The technology was officially presented at EMO 2025 in Hanover and represents a clear commitment to hydraulic clamping technology from MAPAL. For the market launch, DirectCool is optionally available for UNIQ Mill Chucks, HA and UNIQ DReaM Chucks with 4.5° outer geometry in diameters from 6 to 32 mm.

Background: What sets the UNIQ hydraulic chucks apart

UNIQ hydraulic chucks have an identical outer geometry to the shrink chuck. At the same time, the hydraulic chuck can be distinguished externally from shrink chucks due to its glossy surface and blue screw in the HSK collar. UNIQ hydraulic chucks are highly durable and corrosion-resistant. MAPAL has picked up several design awards for the chuck.