Practical quick-release fasteners designed specifically for aluminum profiles
Quick-Release Clamps for Trades, Mechanical Engineering, and Industry
Tighten faster, without a wrench: The RUWI quick-release clamps use the eccentric lever principle to secure workpieces, brackets, or stops in T-slot profiles (slot , 6, 8, 10) tool-free . Where others turn wing screws, you simply flip the lever—depending on the size, this allows you to apply up to 4 kN clamping force in seconds instead of turning multiple screws. This saves a noticeable amount of time when frequently changing workpieces and stops, both in the workshop and in fixture and machine construction.
Which quick-release skewer is right for your slot?
The choice depends on the groove width of your profile and the thickness of the workpiece. Three sizes cover the standard range:
- Ø 15 mm for slot 6: compact (height ~34 mm), clamping stroke ~6 mm, clamping force ~1.5 kN – for small systems such as 30×30 profiles and light-duty applications. Also available with external thread and clamping nut.
- Ø 20 mm, the medium size (height ~44–47 mm, clamping stroke 8–11 mm, ~2.5 kN) for 40×40 and 45×45 systems: for slot 8 or for slot 10, also available with an external thread for slot 10.
- Ø 30 mm for higher clamping forces (up to 4 kN) and greater clamping height (14–26 mm), for thicker workpieces and frames: for slot 8 or for slot 10.
slot nuts s are designed to fit aluminum profiles from various manufacturers (Item, Bosch Rexroth, Sauter, and others)—the key factor is the groove width. If you want to get started quickly, choose the Starter Set slot 6 or slot 8. If you’re unsure which size fits your profile, contact us—we’ll help you choose.
Technical Design and Operation
RUWI quick-release fasteners are eccentricclamping lever that lock into the profile groove via a form-fit mechanism. At their core is a cylindrical body (Ø 15, 20, or 30 mm, depending on the size) and a spring-loaded bolt. When the lever is flipped, it pulls the T-slot nut upward—a short lever stroke multiplies the manual force.
- Eccentric lever: Clamps the slot nut into the slot with minimal effort.
- Adjusting nut: precisely adjusts the clamping stroke to the workpiece height and material thickness.
- Return spring: allows the tensioner to spring back to the open position on its own when released.
- Materials: Steel, galvanized slot nuts, levers made of aluminum or die-cast zinc – designed for continuous use, “Made in Germany.”
Depending on the size, this allows you to apply up to 4 kN of force clamping force —enough to securely hold fixtures and workpieces during drilling, milling, or assembly. The lever locks into place with a distinct click and a positive fit, which reduces the risk of accidental release, even when vibrations occur.
Ergonomics and Cost-Effectiveness
It takes just one hand to operate: flip the lever while your other hand holds the workpiece. No wrench, no searching for tools, and you can feel from the resistance of the lever whether the clamp is secure. Each clamping operation takes only seconds—which shortens setup time and reduces fatigue during frequent setup changes. Because clamping is so quick, it actually gets done on a daily basis; that’s the real safety benefit compared to wing screws and slot nut, which people often skip when under time pressure.
These clamps are more expensive than simple T-slot nuts with wing screws. However, when working with frequently changing workpieces, in mass production, and in fixture construction, the time saved on setup quickly offsets the additional cost—and thanks to the availability of replacement parts, the clamps remain in service for a long time.
Areas of Application
- Woodworking and Workshop: Secure workpieces on drill and router tables with slot , flexible stops, and gluing frames.
- Metalworking and Mechanical Engineering: Fixture manufacturing, sensor mounts, stop strips in profile racks, quick changeovers.
- Furniture Manufacturing and Interior Finishing: temporary cabinet structures, pressing operations, assembly jigs.
- Exhibition Stand Construction and Prototyping: Quick assembly and disassembly of aluminum profile structures, freely positionable brackets.
- CNC and Automation: Hold-down devices on CNC tables, flexible clamping points in systems.
Accessories and compatible RUWI products
- The clamping bracket with a pre-installed quick-release mechanism for right-angle frames and stops.
- adapter plate , featuring two clamping handles, for connecting two profiles or securing a single profile to a panel without screws.
- RUWI drilling tables and router tables with profiled grooves into which the quick-release clamps engage directly.
- Clamp with external thread and locking nut, designed to be screwed through a hole or plate instead of into a channel groove—same eccentric lever, different mounting.
Buying Guide
Three questions will help you choose the right model. First, the groove width of your profile— slot , 6, 8, or 10; this determines which clamps will fit. Second, how much clamping force and clamping height you need: Ø 15 for light-duty tasks and small profiles, Ø 20 for most applications, and Ø 30 for higher forces and thicker workpieces. Third, the accessories—clamping brackets, adapter plates , or clamps with external threads? For mass production and frequently changing dimensions, the clamps quickly pay for themselves; in prototyping and hobby applications, they speed up the process. If you’re unsure, we’ll advise you on the right size.
