The KR SightLink E3040 Super Knuckle 15 cm (6 in) adds a camera, light, sensor, or monitor to an extrusion machine cell you already have - without rebuilding the frame. It secures with T-nuts to 20x20, 30x30, or 40x40 extrusion (for example, a 50 cm inspection cell built from 30x30 profile), gives you a fast knuckle arm to position the device, and ends in a standard ¼"-20 screw.

The Super Knuckle is a double ball-and-socket arm - a ball joint at each end held by a single central knob. Loosen that one knob and both joints swing free for fast pan-and-tilt positioning; tighten it and the whole arm locks at once. At 15 cm (6 in) it's the middle length - more reach than the 8 cm (3 in), with more stiffness and load margin than the 23 cm (9 in). Choose it when the 8 cm (3 in) can't quite reach but you don't need the longest arm.

This is the flexible-arm route - a positioning and tuning tool for integrators, not a production mount. Use it to find and prove the right camera and light positions; once the layout is locked, switch to the SightLink rosette-tooth / square-coupler version for a fixed, repeatable production mount.

When the machine cell already exists, you don't want to rebuild it to add a camera - and a one-off bracket locks you into one position before you've proven it. SightLink lets you mount onto the existing extrusion, tune the camera and light while the inspection is still being dialed in, and reconfigure by moving the arm instead of remaking a bracket.

This is a setup and positioning tool, not the production mount. An integrator uses it to get a camera and light onto a customer's cell quickly, find the right positions, and prove the inspection. A factory machine-vision team uses it the same way - to dial in the geometry on the cell. Once those positions are locked, the rosette/square-coupler version provides the fixed, repeatable mount a production line needs.

This kit is the middle link of the chain - it connects your existing 20x20 / 30x30 / 40x40 extrusion cell to your device's ¼"-20 thread, base and arm included:

¼"-20 is the common camera/accessory thread. "Male" means this kit provides the screw; your device or adapter plate needs the matching female thread. If the image must stay level and can't twist on a single screw, add a locating pin or anti-rotation plate.

Choose Super Knuckle when you want fast, freehand positioning - one knob frees both ball joints to glide to any angle, then locks them together, and it has the widest range of accessories. Choose Omni when you want more reach, higher load, or a repeatable angle you can return to exactly - that's what its rosette lock is for. They hold differently: Super Knuckle for quick, free movement, Omni for a locked, repeatable angle.

This Super Knuckle reaches 15 cm (6 in) and carries up to 3 kg / 6.6 lb close to the clamp - a balanced reach, derating toward the tip. It is friction-held with a single knob - fast and freehand, but with no indexed angle return, so re-aim by eye after a bump; it is a positioning tool, not a production mount.

• Reach: 15 cm (6 in) nominal.
• Close-in working load: up to 3 kg / 6.6 lb.
• Best for: machine-vision cameras, lights, sensors, monitors, and accessory plates that need a mid-range reach.

Start with the shortest arm that reaches the target. The shorter Super Knuckle is cheaper, carries more load, and holds steadier - so reach for 15 cm (6 in) only when 8 cm (3 in) can't get to the target. The 3 kg figure is a close-in reference for the arm; usable load still depends on payload position, mounting angle, vibration, and cable pull. Secure the cable to the frame before judging stability - cable drag can shift a camera even within the load range.

SightLink E3040 Super Knuckle 15 cm (6 in) is at its best for mid-reach freehand camera and light positioning on an extrusion cell you already have - where a balanced reach and quick repositioning matter more than a locked, repeatable angle.

• Mid-reach camera and light positioning on an existing 20x20 / 30x30 / 40x40 extrusion cell.
• Retrofitting vision onto a machine frame without rebuilding it.
• Quick reconfiguration while dialing in the inspection.
• Integrator demos that show vision working on the customer's own frame.
• Cable-managed setups within the arm's load range.

The kit ships as three parts - the extrusion base, the 15 cm (6 in) Super Knuckle arm, and the ¼"-20 male device screw - and nothing device-specific.

• SightLink E3040 extrusion base (T-nut mount) for 20x20 / 30x30 / 40x40 profile.
• Super Knuckle 15 cm (6 in) arm.
• ¼"-20 male device screw.

Not included unless bundled: the extrusion frame or machine cell; the camera, lens, light, sensor, monitor, or controller; a camera-specific adapter plate; machine guarding; and cable strain-relief hardware.

Before ordering, confirm four things: your extrusion size (20x20 / 30x30 / 40x40), a ¼"-20 female device thread, payload and cable pull suited to a 15 cm (6 in) reach, and a reviewed path if the setup is vibration-prone or production-bound.

• Confirm the extrusion is 20x20, 30x30, or 40x40 with a slot/face the E3040 base can land on, and enough clearance for the base, arm sweep, device body, connector, and cable bend radius.
• Your device needs a ¼"-20 female thread, or an adapter plate that gives it one.
• Check that payload weight, center of gravity, and cable pull suit the 15 cm (6 in) reach.
• This flexible-arm kit is for positioning and testing, not production. For a released production mount, use the SightLink rosette-tooth / square-coupler version.