The KR VisionHolder Rosette Ring Light Mount 90 holds a larger machine-vision ring light on an indexed rosette connection - so the light angle you dialed in is a locked tooth position, not a friction setting that drifts. It is the second-largest of the five ring mounts: a 90 mm stainless plate for larger ring lights that cover wider fields of view.

The mount is a flat stainless-steel plate with two working faces. The light side carries slotted screw holes on a 90 mm plate - the slots give radial adjustment, so one plate covers a spread of ring-light bolt circles. The frame side is an indexed rosette foot that bolts onto any rosette output in the SightLink system: the extrusion base node, either face of the 90° connector, or either end of a rosette extension arm.

Because the teeth index, the light comes back to the same angle after cleaning, a lamp swap, or a teardown - the lighting half of your inspection recipe stays set.

In machine vision, the light angle is half the inspection - contrast, glare, and shadow all live or die by it - yet lights are usually hung on friction joints that creep and can never be re-set after maintenance. VisionHolder puts the light on the same indexed rosette chain as the camera, so its angle is repeatable by design.

VisionHolder is the payload side of the SightLink rosette mount system: the camera plate, the ring light mounts, and the bar light mount all share the same rosette foot. That means a light can take over any position a camera was using, two payloads can run off the two ends of one extrusion-mounted arm, and every one of them locks to a tooth position that survives loosen-and-retighten. You stop re-tuning the scene every time someone touches the frame.

This mount is the last link before the light - its rosette foot lands on any rosette output in the SightLink chain, and your ring light bolts to its slotted plate with the included stainless screws:

The slots take the light's mounting screws at a range of bolt-circle diameters, so the plate doesn't demand one exact light model. Check your light's outer diameter and mounting-screw circle before ordering - the 90 plate is matched to larger ring lights in the 90 mm class.

Pick the plate whose size matches your ring light's body: the mount's number is its plate outer diameter in millimetres, and 90 is the second-largest - for larger rings that light wider scenes.

• 40 - the smallest rings, roughly 40 mm class.
• 50 - small rings around 50 mm.
• 70 - mid-size rings around 65-70 mm.
• 90 (this mount) - larger rings around 90 mm.
• 120 - the largest rings, up to roughly 115-120 mm.

Every size carries the same rosette foot and the same slotted-hole logic - only the plate grows. For rectangular bar lights, use the VisionHolder Rosette Bar Light Mount instead.

Body and hardware are stainless steel - no coating to chip into the work area, nothing to rust in a damp corner of the shop, and a surface that wipes clean.

• Stainless plate and stainless screws - one material story, no mixed-finish hardware.
• Raw stainless finish - bare metal, easy to wipe down.
• Edges lightly broken - deburred for safe handling during installs and service.

Use the Ring Light Mount 90 wherever a larger ring light's angle has to be exact - and stay exact:

• Wider-field ring lighting over inspection points on extrusion inspection cells.
• Production stations where the light angle must survive cleaning and lamp swaps.
• Indexed camera-plus-light pairs on one rosette chain - light off one arm end, camera off the other.
• Repeatable A/B lighting trials: step the angle by teeth, note the position, return to it.
• Machine retrofits where a drifting light bracket keeps un-tuning the inspection.

The box holds the stainless ring light mount and its stainless mounting screw set - the last link before your light.

• VisionHolder Rosette Ring Light Mount 90 (stainless steel).
• Stainless mounting screw set.

Not included: the ring light itself, and the rosette chain it lands on - the SightLink base node, 90° connector, and extension arms are sold separately, as is the extrusion frame.

Before ordering, confirm three things: your ring light's diameter and mounting-screw circle, a rosette output on your frame for the foot to land on, and a short support path from frame to light.

• Check the light's outer diameter and mounting-screw circle against the plate's slotted mounting pattern.
• The foot needs a rosette to bolt to - a SightLink base node on the extrusion, a 90° connector, or an extension-arm end.
• Keep the light close to the frame - a larger ring hangs more weight off the joint, and short chains hold angles best.
• Plan static, indoor mounting on the frame - and strain-relieve the light's cable near the light so it can't tug the angle.