Mini Sensor Mounting Plate with Precision Slots and Counterbored Holes for CNC Machined Sensor Mounting Bracket Assemblies

This mini sensor mounting plate is machined from 6061-T6 plate at roughly 90mm long and 4mm thick, carrying a row of narrow milled slots, four counterbored mounting holes, a stepped window recess, two dowel pin holes and a shallow pocket on the underside for clearance. Small plates at this thickness are the least forgiving parts in a shop: the ratio of machined area to remaining wall is high, so the plate wants to bow, and a bowed plate reads as a bad hole position on the customer line even when the hole itself is correct. The process below is built around that single problem.

Thin plate work is won or lost in the clamping and in the order of operations, so the sequence is fixed rather than left to the operator.

Flatness is checked before anodizing and again after, because anodizing builds 10-15um on each face and can pull a thin plate slightly. Plates that fail the flatness check are re-trued rather than pushed through, which is what keeps the hole position honest at assembly.

These plates are almost always part-specific, so the layout, thickness and features follow your assembly.

• Plate sizes from 30 x 30mm to 250 x 150mm, thickness 2-12mm.
• Feature set: through slots, blind slots, stepped recesses, window openings, pockets, ribs, lightening cutouts.
• Hole patterns: counterbored, countersunk, tapped, reamed dowel holes, mixed patterns on one plate.
• Materials: 6061-T6 for general use, 5052 for formability and corrosion, 7075-T6 for stiffness, 304 or 316L stainless where the plate is a structural cover.
• Finishing: clear or black anodizing, hard anodizing on wear faces, bead blast, laser marking of part numbers, masked contact faces.
• Assembly support: tolerance stack review, mating part fit check with a sample, first article report.
• Prototype from 1 piece, with the same program kept for repeat orders.

Send a drawing or STEP model with the mating parts, and our engineering team returns a DFM note on minimum wall, slot width against thickness, and flatness expectations, plus a quote, usually within one to two working days.

Dongguan Changxinda Precision Technology Co., Ltd has manufactured custom CNC parts since 2008, based in Dongguan, Guangdong, China. The shop runs 4-axis and 5-axis machining centers, turn-mill combined lathes and CNC lathes with around 100 employees, including dedicated CAM programming and quality teams. More than 200 customers are served in medical equipment, robotics, automotive, aerospace, automation, laser, LED, lithium battery and precision testing instruments, and 50-60 percent of production is exported. The company is ISO 9001:2015 certified, with annual sales between USD 10 and 20 million and inspection carried out in house on CMM, granite plates and optical equipment. Thin plates, covers and small precision hardware are everyday work, using the same capability applied to optical and sensor housings.

• Monthly capacity above 10,000 pieces for small plates and covers, with reserved capacity for repeat programmes.
• Typical lead time: 3-7 days for prototypes, 7-14 days for 10-100 pieces, 14-30 days for mass production.
• Programs, soft jaws, support plates and the approved first article are archived against your part number, so repeat lots start without re-making fixtures.
• Flatness and CMM reports ship with every lot, keeping your incoming inspection short.
• Rush service and scheduled release shipping available for projects with a fixed line-side date.
• Export packaging: plates stacked in trays with interleaving, foam wrap, desiccant, master carton, palletized for LCL or FCL.

Sensor and detector mounting, camera and optical module retaining plates, PCB and FPC stiffeners, electronic device internal brackets, medical device covers, laser module mounts, robot end-effector small plates, and custom non-standard mini hardware parts built to customer drawings.

Send your drawing or STEP model together with the mating part, and our engineering team will return a DFM note on minimum wall, slot width and flatness together with a quotation, usually within one to two working days.