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On-Demand CNC Platform

CNC Machining for
Plymouth Surgical Robotics

Plymouth sits in the center of Medical Alley — the thirty-mile corridor around Minneapolis that has pivoted sharply from traditional medical devices into surgical robotics over the last five years. Medtronic's Hugo RAS platform, Stryker's Mako orthopedic robot, and a dense layer of Intuitive Surgical device partners all draw on this corridor. RivCut machines Ti-6Al-4V arm-joint housings, tool-adapter shafts, bone-prep end-effectors, and instrument-mount bosses to ISO 13485, with Ra ≤ 0.4 µm sterile-cleanable surfaces on every external face the sterile-processing department touches.

Robotics CNC machining for San Francisco Bay Area, CA. RivCut supplies robotics CNC machining to engineering and manufacturing teams across San Francisco Bay Area and Northern California and nearby Plymouth. Parts are machined 100% in the USA at our Union City, California facility and ship to San Francisco Bay Area nationwide — with expedited air and AOG options when a production line is down.

San Francisco Bay Area sits within Northern California, where demand for robotics components spans precision parts with tight tolerances, full documentation, and short-run to production volumes. Every San Francisco Bay Area order ships with CMM inspection, full material traceability, and a first-article report on request.

Hugo
Medtronic RAS surgical-robot
platform, Medical Alley program
Launched 2021, CE-marked EU
0.4µm
Maximum surface roughness
on sterile-cleanable external faces
Ra baseline for autoclave & VHP
13485
ISO QMS alignment for
every surgical-robotics lot
DHF-ready first-article packages
30mi
Medical Alley radius around
the Plymouth / Minneapolis core
Densest surgical-robotics cluster in US

Precision CNC for Surgical-Robotics Programs

Surgical-robotics parts in Plymouth have to be dimensionally precise and sterile-safe. An arm-joint housing on a Hugo RAS robot that drifts 0.0005 inch changes the end-effector trajectory at the surgical site; a rough-machined fillet on a Mako cutting-guide becomes a bioburden trap after fifty autoclave cycles. We machine Ti-6Al-4V ELI, 17-4 PH H900, and 316L to tolerances as tight as ±0.0002 inch, finish every external surface to Ra ≤ 0.4 µm, and document the material chain all the way back to the mill — ready to drop into an ISO 13485 Design History File without rework.

1

Surgical-Grade Materials

Ti-6Al-4V ELI (ASTM F136) for arm-joint housings, 17-4 PH H900 for tool-adapter shafts, 316L for electropolished fixtures — all mill-certified, heat-lot traced, segregated from industrial stock.

2

Ra ≤ 0.4 µm Sterile Surfaces

Every external face held to Ra ≤ 0.4 µm; drape-mating zones finished to Ra ≤ 0.2 µm. No dead-end threads, no sharp re-entrant corners, no bioburden traps. Ready for ISO 17665 steam autoclave and Sterrad VHP reprocessing.

3

ISO 13485 & DHF-Ready Packages

Material certs, first-article reports, ballooned drawings, surface-finish measurements, passivation certs, and process-control records. Drops into your DHF or DMR the day it arrives.

What We Machine for Plymouth Surgical-Robot Teams

From Hugo RAS arm-joint housings to Mako bone-prep end-effectors, we machine the precision hardware that keeps Medical Alley's surgical-robotics programs moving through design, verification, and production.

Hugo RAS Arm-Joint Housings

The robotic arm on Medtronic's Hugo RAS system pivots through a stack of joint housings that each carry a bearing, a harmonic drive, and cable routing. We machine these bodies in Ti-6Al-4V ELI (ASTM F136), hold the bearing seat to ±0.0005 inch, blend every internal fillet so the cable harness cannot chafe, and finish external surfaces to Ra ≤ 0.4 µm so they survive the sterile-processing cycle.

Ti-6Al-4V ELI, Ra ≤ 0.4 µm

Tool-Adapter Shafts & Drive Couplings

The instrument side of a surgical robot couples to a sterile adapter that carries torque across the drape boundary. We turn these shafts in 17-4 PH H900 on live-tool lathes, grind the drive-dog geometry concentric to the bearing pilot, and tolerance the kinematic features so the surgeon feels no backlash at the handle. Full concentricity reports on every shaft.

17-4 PH H900, ±0.0002" TIR

Mako Bone-Prep End-Effectors

Stryker's Mako robotic arm drives a high-speed cutter through a rigid end-effector body while an optical tracker corrects the trajectory in real time. We machine the cutting-guide bodies in 17-4 PH H900 for burr stiffness, hold the tool-mount bore to ±0.0002 inch concentric to the tracker datum, and deliver surface finishes that survive repeated steam-autoclave cycles without micro-pitting.

17-4 PH H900, autoclave-cycled

Instrument Mounting Bosses & Sterile Brackets

The pods that hold instrument canisters, vision modules, and energy-delivery handles onto the robot tower are CNC-machined brackets with multiple datum stacks. We cut them in 6061-T6 hardcoat or Ti-6Al-4V depending on weight/sterile class, deburr every edge to a controlled break, and ship them with a mapped passivation or anodize report.

Controlled edge-break, mapped finish

Calibration Pucks & Registration Fixtures

Every surgical robot needs a calibration workflow — an optical-tracker puck, a base-frame registration fixture, or a drape-interface gage. We machine these in 316L for electropolish-ready surfaces or Ti-6Al-4V for imaging compatibility, and hold the tracker-ball locations to ±0.0002 inch so the robot's coordinate frame lands inside spec on first power-up.

316L / Ti-6Al-4V, ±0.0002"

Prototype & Verification-Build Hardware

Surgical-robot programs run through dozens of verification builds before they lock a design. We cut small-batch prototype housings, tool interfaces, and test fixtures in three to five business days, iterate on tolerances with the engineering team, and carry the revision history straight into the production-release lot when the design locks.

3–5 day verification builds
Materials
Ti-6Al-4V ELI (F136), 17-4 PH H900, 316L, 6061-T6 hardcoat, PEEK
Tolerances
Down to ±0.0002"
Finishes
Ra ≤ 0.4 µm, electropolish, passivation (ASTM A967), hardcoat anodize
Documentation
ISO 13485-aligned, DHF/DMR-ready packages

Parts for Plymouth Surgical-Robotics Companies

Arm-joint housings, tool-adapter shafts, bone-prep end-effectors, sterile brackets, calibration fixtures, and verification-build hardware — cut for surgical-robot programs, not industrial automation.

Hugo RAS Arm-Joint Housings

Ti-6Al-4V ELI joint bodies for the robotic arm stack. Ground bearing seats, harmonic-drive mounting faces, and internal cable-routing pockets with blended fillets. Ra ≤ 0.4 µm on every external surface the sterile-processing department touches.

Ti-6Al-4V ELI (F136)

Tool-Adapter Shafts

17-4 PH H900 drive shafts that transmit torque across the sterile drape boundary. Turned and ground on live-tool lathes with kinematic drive-dog features concentric to the bearing pilot. ±0.0002 inch TIR.

17-4 PH H900

Mako Bone-Prep End-Effectors

Rigid cutting-guide bodies in 17-4 PH H900 that hold high-speed burrs concentric to the optical tracker datum. ±0.0002 inch tool-mount concentricity, controlled edge breaks, autoclave-qualified finish.

Tracker-datum certified

Instrument Mounting Bosses

6061-T6 and Ti-6Al-4V brackets that carry instrument canisters, vision modules, and energy-delivery handles on the robot tower. Multiple datum stacks, controlled edge breaks, mapped hardcoat anodize or passivation.

Controlled edge-break

Calibration & Registration Fixtures

Optical-tracker pucks, base-frame registration plates, and drape-interface gages. 316L with electropolish-ready surfaces or Ti-6Al-4V for imaging compatibility. Tracker-ball seats held to ±0.0002 inch.

316L / Ti-6Al-4V

Verification-Build Prototypes

Small-batch housings, tool interfaces, and test fixtures in three to five business days. Revision history travels from prototype to production-release lot so the design-lock hand-off is clean.

3–5 day turn

Plymouth's Medical Alley Surgical-Robotics Cluster

Minneapolis metro has more surgical-robotics programs, device OEMs, and instrument houses per square mile than any other region in the country — and Plymouth sits inside the densest ring of that cluster.

#1
US surgical-robotics density
Programs per square mile in Medical Alley
3
Flagship robot programs
Medtronic Hugo, Stryker Mako, Intuitive partners
1-day
SFO → MSP air
FedEx Priority Overnight into Plymouth

Medtronic Hugo RAS is Medical Alley's flagship surgical-robot

Hugo RAS launched in 2021, earned CE-marking for soft-tissue procedures in Europe, and continues to advance its US FDA clinical-submission program. Its core development and supply chain is anchored in the Minneapolis metro. Every joint housing, tool adapter, and mounting boss in that arm is CNC-machined to medical-device QA — and that work does not live in any industrial-robotics supply chain.

Stryker Mako is the orthopedic-robotics standard

Stryker's Mako platform drives robotic-assisted hip and knee procedures across thousands of US hospitals, and Stryker's Surgical Technologies footprint carries real program activity into the Minnesota metro. Mako end-effectors, cutting guides, and calibration fixtures all get machined to the ±0.0002 inch tracker-datum standard that keeps the robot-to-patient coordinate frame honest.

Intuitive Surgical partners layer the sub-tier

The soft-tissue robotics market is still led by Intuitive Surgical, and Intuitive partners with a long list of Minnesota device OEMs on instruments, imaging sensors, and sub-tier hardware. That partner layer sits in Plymouth, Maple Grove, and Golden Valley — and it generates a steady stream of small-batch machining for tool-adapter shafts, instrument housings, and drape-interface bezels.

MN pivoted from industrial robotics to surgical robotics

Ten years ago, Minnesota's robotics story was Fanuc integrators and food-processing palletizers. Over 2020–2025 the center of gravity shifted decisively into surgical robotics, pulling investment, engineering talent, and sub-tier machining with it. The Plymouth workstream reflects that shift: we do not carry a single Fanuc wrist-housing preset, but we keep Ti-6Al-4V ELI on the shelf and the surface-finish CMM calibrated weekly.

Key Surgical-Robotics Customers in the Region

Medtronic — Minneapolis Metro

Operational HQ anchored in Fridley, MN. Home program for the Hugo RAS robotic-assisted surgery system — launched 2021, CE-marked in Europe, with active US FDA clinical-submission work. Joint housings, tool adapters, and mounting bosses all flow through Medical Alley sub-tier machining.

Stryker Surgical Technologies — MN Program Footprint

Mako robotic-arm platform for hip and knee procedures. Bone-prep end-effectors, cutting-guide bodies, and calibration fixtures all get machined to ±0.0002 inch on the tracker-datum-critical features. Mako hardware represents one of the largest production runs in orthopedic robotics.

Intuitive Surgical Partner OEMs — Plymouth / Maple Grove

Contract manufacturers, instrument houses, and imaging-sensor vendors supplying the soft-tissue robotics leader. Small-batch tool-adapter shafts, instrument housings, and drape-interface bezels. The partner layer is where a lot of Medical Alley surgical-robot iteration actually happens.

Medical Alley Startups — Surgical-Robotics Pipeline

A rolling pipeline of early-stage surgical-robot startups across the Minneapolis metro, many seeded by Medtronic and Stryker alumni. Verification-build prototypes, design-iteration hardware, and pilot-run housings in three to five business days. This is the workstream that keeps our Plymouth capacity busy between production lots.

Why Plymouth Surgical-Robot Teams Work with RivCut

Plymouth is two time zones ahead of our shop in Union City, California. Upload a Hugo RAS housing design during a Medical Alley morning design review, and we can have an instant quote back before the meeting ends — with a DFM read that already caught the three bioburden-trap fillets your model picked up.

Dedicated Surgical-Robotics Workstream

Ti-6Al-4V ELI, 17-4 PH H900, and 316L kept on shelf in a medical-segregated stock crib. Tooling kits kept clean of ferrous contamination. A named contact who understands the Hugo RAS and Mako drawing packs and does not confuse them with a Fanuc wrist housing.

ISO 13485 & DHF-Ready Documentation

Our QMS is aligned to ISO 13485. Every surgical-robotics lot ships with material certs (ASTM F136 / A564), first-article reports, ballooned drawings, process-control records, and passivation or electropolish certs. Drops straight into your Design History File — your DHF auditor will not ask a second question.

Surface-Finish CMM on Every Cleanable Surface

Surgical robots fail when a housing traps bioburden or a fillet goes micro-rough after fifty autoclave cycles. Every Plymouth surgical-robotics order gets surface-finish measurement on every external cleanable face — not just a sample — with the Ra values written onto the first-article report.

SFO → MSP Overnight Air

FedEx Priority Overnight runs SFO to MSP every evening. We hand off the crate by late afternoon Pacific and it lands in Plymouth next morning Central. For verification-build iteration and small-batch lots, that lane keeps a surgical-robot design review on schedule.

ISO 13485
Aligned QMS for
Surgical-Robotics Lots
50
States We Ship To
≤ 0.4µm
Ra Baseline on Sterile Surfaces
100%
CMM Inspected
Certifications & Standards
Active
ISO 13485-Aligned QMS
Medical-device quality system covering document control, design transfer, first-article inspection, and DHF-ready traceability. Formal certification in progress.
Active
NIST-Traceable CMM
All measuring equipment calibrated to NIST. Surface-finish measurement on every external cleanable face with Ra values written onto the first-article report.
Active
ASTM F136 / A564 Material Traceability
Ti-6Al-4V ELI (F136), 17-4 PH (A564), 316L, and PEEK certified stock with heat-lot traceability. Mill cert and passivation record travel with every crate.
Active
Passivation per ASTM A967
Stainless passivation documented to ASTM A967; electropolish available on 316L calibration fixtures. Surface-chemistry certs ship with every medical-device lot.

Need our full ISO 13485 quality documentation before ordering? Email us — we'll send everything your regulatory team needs.

How to Get Plymouth Surgical-Robotics Parts Quoted and Cut

Design reviews do not wait for machining lead times. Here is how RivCut keeps up.

Step 1

Upload & Quote

Upload your STEP file with surface-finish callouts and material spec. Our AI prices it immediately and we run a free DFM check against the ISO 13485 cleanability ruleset — no dead-end threads, no bioburden traps, no unblended fillets.

Step 2

We Machine & Inspect

Parts run on our 5-axis mills and live-tool lathes with tooling kept clean of ferrous contamination. CMM verification on bearing seats, drape-interface faces, and tracker datums. Surface-finish verification on every cleanable surface.

Step 3

Ship to Plymouth

SFO → MSP FedEx Priority Overnight, or next-day overland to Plymouth, Maple Grove, or Fridley. Material certs, CMM report, surface-finish measurements, and passivation certs travel in the crate. Drops into your DHF the day it arrives.

Questions from Plymouth Surgical-Robotics Teams

Yes. Medtronic's robotic-assisted surgery platform, Hugo RAS, has its program footprint anchored in the Minneapolis metro, and Plymouth is squarely inside that corridor. We machine arm-joint housings in Ti-6Al-4V ELI (ASTM F136) with ground bearing seats, instrument-mount bosses held to ±0.0005 inch, and cable-routing pockets that clear the internal harness without sharp edges. Every housing leaves the shop with heat-lot traceability, a full dimensional report, and surface finishing to Ra ≤ 0.4 µm on every external cleanable surface — the finish class that survives ISO 17665 steam autoclave and Sterrad VHP reprocessing without micro-pitting.
Yes. Stryker's Surgical Technologies business has a meaningful Minnesota presence and the Mako robotic-arm platform (hip and knee) generates steady demand for bone-prep end-effectors, calibration fixtures, and surgical-guide housings. We machine the rigid cutting-guide bodies in 17-4 PH H900 for burr stiffness, the calibration pucks in 316L stainless for electropolish-ready surfaces, and the registration pins in Ti-6Al-4V so they image cleanly on intraoperative CT. Tolerances land in the ±0.0002 to ±0.0005 inch window on the features that set the robot-to-patient coordinate frame.
Completely different regime. An industrial robot arm tolerates paint, machine oil, and weld spatter; a surgical robot end-effector has to survive hundreds of steam-autoclave cycles without harboring a single colony-forming unit. That means no dead-end threads, no unblended fillets, no micro-burrs at edge breaks, surface finishes at Ra ≤ 0.4 µm on everything the sterile-processing department touches, passivation to ASTM A967, and material chains that trace all the way back to the mill. The QA regime is ISO 13485 and Design History File (DHF), not AS9100 or IATF. We wrote a separate process for this work because a Hugo RAS arm-joint housing is not a Fanuc wrist housing and does not pass through the shop the same way.
Yes. Every surface a circulating nurse or sterile-processing tech touches has to be cleanable — no bioburden traps, no dead ends, no rough patches where fluid can pool. We machine to a Ra ≤ 0.4 µm baseline on external surfaces, ramp to Ra ≤ 0.2 µm on drape-mating faces where the plastic drape has to seal, and electropolish 316L fixtures where finish class demands it. All surface-finish callouts are documented on the first-article report, so your incoming QA sees the measured value against the drawing tolerance on every lot.
Yes. Our QMS is aligned to ISO 13485 with documentation packages ready to flow into your Design History File (DHF) and Device Master Record (DMR). Every surgical-robotics lot ships with material certs traceable to ASTM F136 (Ti-6Al-4V ELI) or ASTM A564 (17-4 PH), first-article inspection reports in AIAG or medical-device format, ballooned drawing acceptance, and process-control records covering tool cycles and coolant chemistry. When your DHF auditor asks for the machining trace on a Hugo arm-joint housing serial number, we hand over a complete record in under a business day.
Yes. Intuitive Surgical partners with a long list of Minnesota device OEMs — contract manufacturers, instrument houses, imaging-sensor vendors — many of them clustered in the Plymouth and Maple Grove corridor. We support that sub-tier layer with ISO 13485-aligned machining of tool-adapter shafts, instrument housings, drape-interface bezels, and the small-batch prototype hardware these programs burn through during design iterations. Medical Alley is unique in the density of surgical-robotics OEMs, startups, and sub-tier suppliers inside a thirty-mile radius — we built our Plymouth workstream around that density.

Robotics CNC in Other Cities

We serve surgical-robotics and automation teams in cities across the US.

How Plymouth's Top Industries Use Robotics CNC Machining

Plymouth's economy drives specific machining demand. Here's what we see from local teams.

Cardiac Rhythm Management (CRM/CRHF)

Medtronic campusLeadless & MRI-conditional

Medtronic's CRM and CRHF operations anchor Plymouth and drive a specific turning profile. MP35N and platinum-iridium electrode lead stems at sub-millimeter OD. Ti-6Al-4V headers, sealing pins, and set screws for pacemaker and ICD enclosures. 316LVM components across the pacing accessory set. Program discipline is real: ISO 13485, 21 CFR 820, 21 CFR Part 11, and Medtronic SQA-0001 all ride with every lot.

RivCut runs Swiss-type turning from Union City — guide-bush lathes, validated setups, Part 11 records — shipping LTL to Plymouth in three business days and SFO-to-MSP air next-day on AOP events.

Medtronic CRMMedtronic CRHFLeadless pacemakersMRI-conditional ICDs
Insider tip: Put Medtronic SQA-0001 callouts on the drawing, not just the PO. Receiving inspectors triage by what is printed on the drawing, not what is buried in the PO text. It saves a day or two at the dock.

Plymouth CRM teams use CNC turning for electrode lead stems, sealing pins, header pins, and set screws — the sub-millimeter rotary features that milling cannot reach.

Orthopedic & Catheter Contract Manufacturing

Donatelle / ProtomaticCretex / Nortech

Inside a thirty-mile radius of Plymouth, the medical contract-manufacturing base covers everything between the OEM and the sterile pack. Donatelle in New Brighton runs precision medical machining and assembly. Protomatic in Maple Plain is a dedicated medical Swiss-type shop. Cretex Medical in Brooklyn Park rolls up implantable and diagnostic device manufacturing. Nortech Systems in Maple Grove covers electromechanical builds. The demand spans orthopedic bone screws, catheter mandrels, and sub-assembly components.

RivCut overflow-turns into this ecosystem with the same documentation standard. Lot sizes 100 to 10,000, every lot with mill cert, passivation cert, and CMM or optical report.

DonatelleProtomaticCretex MedicalNortech Systems
Insider tip: For 316LVM Swiss-type mandrels, spec the stock condition (cold-drawn vs annealed) on the drawing. Cold-drawn bar cuts cleaner and holds Ra with less polishing, and contract manufacturers care about that Ra number because it drives balloon-crimp consistency downstream.

Contract-manufacturer demand has a cadence tied to OEM forecast updates. When a CRM or vascular program ramps, overflow Swiss-type demand ramps one to two quarters behind.

Surgical Instruments & Olympus

Olympus SurgicalTwin Cities corridor

Olympus Surgical and the broader Twin Cities surgical-instrument base drive a steady Swiss-type instrument-component pipeline. Dowel pins in 17-4 PH H900 per ASTM F899, articulated-joint set screws, suture-device mandrels, and small-OD drive shafts for GI and urology devices. Sterilization cycles push material selection toward passivated stainless and Ti-6Al-4V; repeated autoclave means surface finish and corrosion resistance matter as much as dimension.

RivCut stocks the common medical grades so rush instrument spares start cutting the day the drawing arrives. Three-business-day turns are routine on straightforward Swiss geometries.

Olympus SurgicalSurgical instrumentsGI / urology devices
Insider tip: Call out ASTM A967 passivation on instrument dowels and pins in the note block. Some shops default to a generic nitric pass; the A967 callout drives the right bath selection and gives you the cert format receiving expects.

Surgical-instrument demand favors shops that can produce small lots on validated setups without re-running a full qualification each time.

Built for Medtronic's Hugo Surgical Robotics Supply Chain

The Plymouth robotics story is not industrial automation — it is surgical robotics, and the anchor program is Medtronic Hugo RAS. Medtronic's operational footprint runs through Fridley and the surrounding Minneapolis metro, with Plymouth sitting at the heart of the Medical Alley corridor where Hugo's sub-tier supply chain actually lives. Hugo is a robotic-assisted surgery system that launched in 2021, earned CE-marking for soft-tissue procedures in Europe, and continues to advance its US FDA clinical-submission program. Every arm-joint housing in that robot is CNC-machined from Ti-6Al-4V ELI; every tool-adapter shaft is turned in 17-4 PH H900; every instrument-mounting boss is bracket-machined in 6061-T6 hardcoat or titanium with controlled edge breaks. Layered on top of Hugo is Stryker's Mako orthopedic robot — hip and knee bone-prep end-effectors, calibration pucks, and registration fixtures machined to ±0.0002 inch tracker-datum tolerance — and beneath both is the dense layer of Intuitive Surgical partner OEMs, contract manufacturers, and Medical-Alley surgical-robotics startups that fill Plymouth, Maple Grove, and Golden Valley. This is a supply chain with zero overlap in part type, material, or QA regime against industrial-robotics machining elsewhere in the country. RivCut keeps Ti-6Al-4V ELI on the shelf, holds Ra ≤ 0.4 µm on every external cleanable face, passivates to ASTM A967, and ships documentation that drops straight into your Design History File. Surgical-robotics QA is a different regime from AS9100 and IATF — and Plymouth is where we machine to that regime.

Start Your Plymouth Surgical-Robotics Quote Today

Whether you need a Hugo RAS arm-joint housing prototype, a Mako cutting-guide production lot, or a single optical-tracker calibration puck for a verification build — upload your drawing and get a same-day quote. Your parts ship to Plymouth, Maple Grove, Fridley, or any Medical Alley facility.

Get a Surgical Robotics Quote →

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