Ø180 mm Round Baseplate Cover with Eccentric Sensor Boss, 6061-T6
Ø180 mm thin round baseplate cover in 6061-T6: eccentric sensor boss with Ø26.3 mm bore, multi height threaded bosses at 0.02 mm parallelism, flatness 0.05 mm. CMM checked. Quote in 24 hours.
Semiconductor & Optics
A large thin circular cover plate with a raised eccentric bearing or sensor seat, standing threaded bosses for stacked PCB or optics mounting, and a precise perimeter hole pattern. machined both sides from 6061-T6 plate.
Or email drawings to kgl@kglmfc.com
Key Specifications
| Parameter | KGL Capability |
|---|---|
| Material | Aluminum 6061-T6 |
| Process | Double side CNC milling, five axis boss machining, drilling and tapping, ultrasonic cleaning, micro deburring |
| Outer diameter | Ø180 mm, thin section |
| Sensor boss bore | Ø26.3 mm in Ø44 mm eccentric seat, depth 9.95 / 12 mm |
| Threads | 4X M2, 5X M4 on bosses; 9X M3, 12X M2 on face and perimeter |
| Flatness | 0.05 mm max |
| Boss parallelism | 0.02 mm to main datum |
| Finish | Conductive anodize or conversion coating, RoHS |
| Inspection | CMM 100 percent flatness and positions, depth micrometer, M2 / M3 / M4 thread gauges |
| Tolerance | ±0.005 mm standard on metals, engineering plastics, and carbon fiber composite |
| Certifications | ISO 9001:2015, ISO 13485:2016, AS9100D |
| Capacity | 100+ CNC machines including 11 five-axis centers |
| MOQ | No MOQ; 1-piece prototypes supported |
| Quote | Within 24 hours for complete 2D/3D files |
About This Part
Sensor packaging plates live in a small world of tenths, and this one is no exception: a Ø180 mm disc, thin in section, with an eccentric boss raised above the face carrying a Ø26.3 mm bore in a Ø44 mm seat at a controlled depth of 9.95 to 12 mm. The boss seats an optical sensor or bearing while the thin disc around it stays flat within 0.05 mm.
Across the face, standing bosses of different heights carry 4X M2, 3X M4, and 2X M4 threads for stacking circuit boards or optical parts at fixed levels. The perimeter carries 9X M3 and 12X M2 threads for the housing closure. Boss top faces run parallel to the main datum within 0.02 mm so every stacked layer sits square.
Machining is double sided milling on vertical machining centers, with the multi height bosses cut on five axis or with precision setups, followed by drilling, tapping, ultrasonic cleaning, and micro deburring. Conductive anodize or conversion coating finishes the part, and the CMM checks 100 percent of the face flatness and boss positions.
This part family supports the Optical / Semiconductor Parts industry. Read how KGL machines parts for that sector, then send your drawing for a quote.
Why Machine It at KGL
Five-Axis Fleet
100+ CNC machines including 11 five-axis centers run complex geometry in single setups, so tolerances do not stack up across refixturing.
Verified Accuracy
±0.005 mm standard on metals, plastics, and carbon fiber composite, verified on Hexagon and Zeiss CMMs (0.0015 mm accuracy).
Fast Prototypes
Engineering feedback with every quotation; prototype parts typically machined in 15 to 25 days.
One Supplier, End to End
Material sourcing, machining, heat treatment coordination, finishing, CMM inspection and export packaging under one roof.
Part-Specific Advantages
- Eccentric sensor boss, Ø26.3 mm bore in Ø44 mm seat, controlled depth
- Multi height threaded bosses, parallel to datum within 0.02 mm
- Flatness 0.05 mm on a Ø180 mm thin disc
- 31 tapped holes across face and perimeter, burr free
- RoHS compliant conversion finish
Typical Applications
- Optical sensor packaging baseplates
- Stacked PCB or optics carrier plates in instrument housings
- Round cover plates with integrated bearing seats
Commercial Terms
| Commercial | Detail |
|---|---|
| MOQ | No MOQ; 1-piece prototype supported |
| Quote | Within 24 hours for complete 2D/3D files |
| Terms | EXW / FOB Shenzhen |
| Certifications | ISO 9001:2015 |
| Packaging | Individual bubble wrap, export carton or wooden case |
| Lead Time | Prototypes 7 to 15 days; production scheduled by volume |
Common Questions
Why an eccentric boss instead of a centered one?
The sensor axis is offset from the cover axis on the customer assembly. Cutting the boss eccentric in the plate removes an alignment shim that the assembler would otherwise have to fit and verify.
How are the different boss heights controlled?
Each height is a separate Z reference on the CMM report, checked against the main datum, so the stacked layers land level without shimming.
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Send your 2D/3D drawings and get a quote within 24 hours. No MOQ for prototypes and small lots.
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