Steelwrist extends its SQ technology to include the SQ40 automatic coupler for compact excavators. The SQ40 allows quick changes of high flow-powered work tools on smaller excavators, providing the same efficiency as larger SQ couplers. This makes changing powered work tools easier and safer, as it can be done without leaving the cab.
Launch of SQ40 expands the SQ technology to compact excavators
In 2017, Steelwrist introduced the SQ auto connection system for quick couplers and tiltrotators. With the SQ technology, it is possible to connect both hydraulic and electrical signals in one movement. With the introduction of the new SQ40 size, Steelwrist’s product range includes eight different SQ quick coupler models (SQ40-SQ90) for excavators from 2 to 7 tonnes.
Significant development efforts have gone into the design of the new SQ40 automatic coupler, and one very critical criterion was to ensure the flow required to power demanding hydraulic work tools. The SQ40 coupler is optimized to achieve a flow of 70 l/min thanks to a new and innovative coupling that provides 40 percent more flow area compared to a standard three-eighths-inch coupling.
With the SQ40 automatic machine coupler, Steelwrist also introduces the new H6 electrical connector that builds on the years of experience with the Open-S V14 electrical connector. The H6 is a 6-pin electrical connector that is fully integrated to the SQ40 locking wedge and has a molded design to ensure that it is environmentally sealed. Large contact surfaces and strong spring-loaded pins ensure reliable electrical transmission and high current capabilities. The contacts core is hardened phosphor bronze, which results in effective corrosion-resistant properties when exposed to harsh conditions, as well as a hardness similar to steel to ensure a long service life.
The SQ40 follows the symmetrical S40 standard, making it fully compatible with existing work tools without requiring costly modifications. Its modular construction enables fast upgrades from S to SQ, with simplified hose routing and easy installation of male couplings integrated into the rear tool shaft. This also means that hose routing is very flexible, and can be adapted to a wide range of hydraulic work tools.
“For the past two years, I have been running the SQ40 size on my own excavator, and once you get used to not having to leave the cab when changing hydraulic-powered work tools, you never want to go back. Since we introduced SQ40 at bauma, there has been a lot of interest for the product from many customers, and with the introduction of the SQ40 quick coupler, we can also offer a sandwich tiltrotator installation. This is beneficial when you want to easily disconnect the tiltrotator to use, for example, a breaker”, says Stefan Stockhaus, Steelwrist CEO.
