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Swiss-turned nitinol mandrel shaft for WATCHMAN FLX heat-setting 316L stent-expansion mandrel Swiss-turned part
On-Demand CNC Platform

CNC Turning in
Maple Grove, MN

Swiss-type CNC turning for Boston Scientific’s WATCHMAN FLX and coronary stent programs in Maple Grove. We turn nitinol mandrel shafts (±0.0002" diameter, Ra ≤0.4 μm), 316L stent-expansion mandrels, 17-4 PH catheter fittings, and PEEK luer-lock connectors. ISO 13485, FDA 21 CFR 820, and ASTM F2063 documentation standard.

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ISO 13485:2016 · FDA 21 CFR 820 QSR · ASTM F2063 · 21 CFR Part 11 · NDA ready.

CNC turning for Maple Grove, MN. RivCut supplies CNC turning to engineering and manufacturing teams across Maple Grove and the Upper Midwest and nearby Plymouth, Minneapolis, Minnetonka, and Brooklyn Park. Parts are machined 100% in the USA at our Union City, California facility and reach Maple Grove in about 4–5 business days by ground freight — with expedited air and AOG options when a production line is down.

Boston Scientific’s Maple Grove campus manufactures WATCHMAN FLX and PROMUS / Synergy coronary stents — two programs where tooling geometry directly determines whether the implantable device performs its cardiovascular function. Every Maple Grove order ships with CMM inspection, full material traceability, and a first-article report on request.

±0.0002"
Nitinol mandrel shaft OD
Swiss-type turning
RivCut capability
Ra ≤ 0.4 μm
Mandrel surface finish
straight off Swiss tool
No secondary grinding
0.5–32 mm
Swiss-type bar capacity
OD range supported
Cardiovascular class
3 Days
LTL ground freight
Union City CA → MSP
I-94/I-90 LTL route
CNC Turning Explained

What Is CNC Turning for Maple Grove Cardiovascular Device Programs?

CNC turning in Maple Grove is cardiovascular tooling Swiss machining — not a generic lathe service. Boston Scientific’s WATCHMAN FLX and coronary stent programs need turned components that are impossible to produce without Swiss-type expertise: nitinol mandrel shafts (ASTM F2063) at ±0.0002" OD over 150mm working lengths without grinding, 316L stent-expansion mandrels (ASTM F138) at sub-0.0002" OD concentricity, 17-4 PH H900 delivery catheter fittings, PEEK luer-lock connectors, and sub-0.025" nitinol wire handling for heat-setting fixture assemblies. Our Swiss-type lathes (12mm, 20mm, and 32mm bar capacity) with guide-bush, high-pressure coolant, and in-process laser micrometer gauging deliver the diameter class, surface finish, and material traceability that Maple Grove cardiovascular supplier-quality engineers require on day one.

1

Swiss-Type Diameter Class

0.5–32mm OD. Guide-bush stabilization, high-frequency spindles, and in-process laser micrometer gauging every 10 pieces for nitinol and 316L mandrels.

2

Cardiovascular Alloy Expertise

Nitinol (ASTM F2063), 316L (ASTM F138), 17-4 PH H900 (ASTM F899), PEEK (ASTM F2026) — all stocked with 3.1 MTRs and ASTM A967 passivation available.

3

Medical QMS Workflow

ISO 13485:2016 QMS, FDA 21 CFR 820 QSR, 21 CFR Part 11 electronic records — Boston Scientific supplier qualification ready.

What We Turn for Maple Grove

Cardiovascular Device Turning Part Types

The signature turned components that keep Maple Grove’s WATCHMAN and coronary stent programs on schedule.

In Maple Grove, Boston Scientific’s WATCHMAN FLX and PROMUS/Synergy stent programs drive Swiss-type turning demand for nitinol mandrel shafts, stent-expansion mandrels, catheter delivery fittings, and PEEK hub components. The tolerances are tighter than most aerospace turning — the nitinol mandrel OD directly controls WATCHMAN frame geometry after heat-setting.

Nitinol Mandrel Shafts (WATCHMAN FLX)

Swiss-turned ASTM F2063 nitinol mandrel shafts at ±0.0002" diameter, Ra ≤0.4 μm straight off the Swiss tool. No secondary grinding required. In-process laser micrometer gauging every 10 pieces across working lengths to 150mm.

Nitinol / ASTM F2063

316L Stent-Expansion Mandrels

316L stainless (ASTM F138) stent-expansion mandrels and catheter fitting bodies at ±0.0002" OD concentricity. Swiss-type turning achieves the Ra target without grinding. ASTM A967 passivation and 3.1 MTRs with every lot.

316L / ASTM F138

17-4 PH H900 Catheter Delivery Fittings

17-4 PH H900 (ASTM F899) delivery catheter fittings and push-rod components for WATCHMAN and stent delivery systems. High strength after aging for catheter delivery mechanism loads. Full ASTM A967 passivation documentation.

17-4 PH H900 / ASTM F899

PEEK Catheter Hub Bores & Luer-Lock Connectors

Implantable PEEK (ASTM F2026) catheter hub bores and luer-lock connector bodies. Luer geometry held to ISO 594-1 / ISO 80369. Concentricity verified by Zeiss CMM. Sub-spindle pickup for complete bore and OD in one cycle.

PEEK / ASTM F2026

Sub-0.025" Nitinol Wire Micro-Turning

Sub-0.025" nitinol wire handling and micro-turning for wire-form fixtures, heat-setting jigs, and nitinol component end-preparation. High-frequency spindle cells with in-process laser measurement below 0.010" feature sizes.

Nitinol Micro / <0.025"

Co-Cr L-605 Stent Component Turning

Co-Cr L-605 (ASTM F90) stent component turning with controlled feed strategies to manage work-hardening. High-pressure coolant and carbide inserts for consistent OD and surface finish on this demanding alloy.

Co-Cr L-605 / ASTM F90
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Nitinol mandrel shaft undergoing in-process laser micrometer gauging at RivCut
In-Process Laser Micrometer — ±0.0002" OD Every 10 Pieces
Real Part. Real Results.

WATCHMAN FLX Nitinol Mandrel Shaft — ASTM F2063

Swiss-turned as a first-article WATCHMAN FLX nitinol mandrel shaft. Delivered to the Maple Grove campus in 7 business days with full ISO 13485 / 21 CFR 820 documentation. Ra ≤0.4 μm achieved straight off the Swiss — no grinding.

±0.0002"
Mandrel shaft OD
150mm working length
Ra ≤ 0.4 μm
Surface finish
off Swiss tool
7 Days
CAD release to
Maple Grove dock
ASTM F2063
Nitinol heat lot
traceability
  • In-process laser micrometer data — every 10 pieces
  • ASTM F2063 3.1 MTR & ASTM A967 passivation cert
  • ISO Class 7 cleanroom-packaged, double-bagged lot
  • NDA-protected project files — 21 CFR Part 11 audit trail
What Ships with Every Maple Grove Turning Order

Features. Alloys. Documentation.

Three cardiovascular turning constraints, baked into every Maple Grove CNC turning order.

Swiss-Type Diameter Precision

Guide-bush Swiss turning for the cardiovascular diameter class.

  • ±0.0002" OD nitinol mandrel shafts
  • Ra ≤ 0.4 μm off Swiss tool — no grinding
  • 0.5–32mm bar capacity
  • In-process laser micrometer gauging

Verified Quality — Zeiss CMM

Every cardiovascular turned part is Zeiss CMM verified before it leaves the floor.

  • Zeiss CMM bore and OD concentricity
  • NIST-traceable calibrated gauges
  • First-article inspection report standard
  • 3.1 MTRs with every heat lot

Medical Documentation Stack

Boston Scientific supplier quality engineers expect this on day one.

  • ISO 13485:2016 QMS & ISO 14971 risk
  • FDA 21 CFR 820 QSR & 21 CFR Part 11
  • ASTM F2063 / F138 / F899 material certs
  • PPAP-equivalent & Supplier Quality Agreement
How It Works

From CAD File to the Maple Grove Campus in Days

Three steps. ISO 13485 aligned. Built for Boston Scientific’s WATCHMAN and stent tooling first-article cadence.

Step 1

Upload CAD or Drawing

Send a STEP or IGES file. Specify alloy (Nitinol ASTM F2063, 316L ASTM F138, 17-4 PH H900, PEEK ASTM F2026, Co-Cr L-605), diameter range, and cleanroom packaging needs. We review against FDA 21 CFR 820 QSR and respond fast.

Step 2

We Swiss Turn & Zeiss CMM Verify

Your mandrel shaft, fitting, or hub component runs on our Swiss-type lathes with guide-bush and in-process laser micrometer gauging. Zeiss CMM output covers bore and OD concentricity, surface finish verification per drawing callout.

Step 3

Clean, Passivate, Cleanroom Pack, Ship

Parts are ultrasonically cleaned, passivated per ASTM A967, double-bagged in ISO Class 7 packaging, and shipped to Maple Grove via 3-day LTL (I-94/I-90) or overnight SFO→MSP air with 3.1 MTRs and full documentation.

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Why Maple Grove, MN Companies Choose RivCut for CNC Turning

Maple Grove cardiovascular programs demand Swiss-type turning precision that most general machine shops cannot deliver. Nitinol mandrel shafts at ±0.0002" OD without grinding, 316L stent mandrels with Ra ≤0.4 μm off the tool, PEEK luer geometry to ISO 80369 — these require dedicated Swiss-type capability, ASTM F2063 material expertise, and ISO 13485 documentation discipline. RivCut machines all of these from our Union City, CA facility and ships to Maple Grove in 3–5 days.

All parts are CNC machined in-house at our Bay Area shop. We never broker or outsource. Learn about RivCut →

FAQ

Common Questions About CNC Turning in Maple Grove

We run Swiss-type lathes with main-bar capacities of 12mm, 20mm, and 32mm for the cardiovascular device diameter class common in Maple Grove. Typical work lands between 0.5mm and 25mm OD with sub-spindle pickup for complete machining in one cycle. That covers nitinol mandrel shafts, stent-expansion mandrels, catheter fitting bodies, PEEK hub bores, and push-rod components for Boston Scientific WATCHMAN and stent programs.
Yes. Nitinol mandrel shafts (ASTM F2063) at ±0.0002" OD over working lengths to 150mm are part of our Swiss-type envelope. We run guide-bush, high-pressure coolant, and in-process laser micrometer gauging to confirm every ten pieces. Surface finish Ra ≤0.4 μm is achieved straight off the Swiss — no secondary grinding required.
Yes. 316L stainless (ASTM F138) stent-expansion mandrels at ±0.0002" OD are a core Swiss-type capability. We achieve the Ra target straight off the tool — no grinding required. Full heat-lot traceability and ASTM A967 passivation accompany every lot.
Yes. 17-4 PH H900 (ASTM F899) delivery catheter fittings, push-rod components, and structural connectors are turned on our Swiss-type lathes. H900 condition provides high strength and hardness for catheter delivery mechanism components. ASTM A967 passivation and 3.1 MTRs ship with every lot.
Yes. We operate to ISO 13485:2016 medical-device QMS, FDA 21 CFR 820 QSR, ISO 14971 risk management, and 21 CFR Part 11 electronic-records rigor. We are ready for Boston Scientific supplier qualification, PPAP-equivalent on-boarding, and a signed Supplier Quality Agreement.
Maple Grove is approximately 1,900 miles from our Union City, CA shop. Ground LTL freight via I-94/I-90 to MSP is 3 business days; overnight air SFO/OAK→MSP is same-day for schedule-at-risk first articles. Most cardiovascular turning orders reach Maple Grove in 4–5 business days after machining completes.
Yes. Implantable PEEK (ASTM F2026) catheter hub bores and luer-lock connector bodies are turned on our Swiss-type lathes. Luer geometry is held to ISO 594-1 / ISO 80369. Concentricity verified by Zeiss CMM. Sub-spindle pickup for complete bore and OD in one cycle.
Upload your STEP or IGES file on our instant quote page. Most cardiovascular turning quotes return within a few hours. Nitinol mandrel shaft first articles typically quote at 7–10 business days; simpler 316L mandrel geometry can be rushed to 3–5 business days.
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Nitinol mandrel shafts. 316L stent mandrels. 17-4 PH catheter fittings. PEEK luer connectors. Quote in hours.

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No minimums · ISO 13485:2016 · FDA 21 CFR 820 QSR · ASTM F2063 · Ships to Maple Grove in 4–5 days

Why Maple Grove Needs CNC Turning

How Maple Grove's Top Industries Use CNC Turning

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

Boston Scientific — WATCHMAN & Coronary Stent Tooling

Boston Scientific’s Maple Grove campus manufactures WATCHMAN FLX and PROMUS / Synergy coronary stents — two programs where tooling geometry directly determines whether the implantable device performs its cardiovascular function. WATCHMAN expansion mandrels that generate non-uniform Af transformation create asymmetric frame expansion. Stent dies with incorrect lumen clearance create laser-cutting kerf variance. Both are DFM-stage decisions that cannot be corrected after the tooling is cut and the first production campaign has run.

RivCut gives Boston Scientific tooling engineers DFM reviews that address the actual failure modes — so the mandrel or die geometry arriving for the first prototype lot is already optimized for the cardiovascular function it supports.

WATCHMAN FLXCoronary StentsNitinol MandrelsStent Dies
Insider tip: If a WATCHMAN mandrel DFM review does not specifically address OD uniformity at 36 angular positions across the mandrel body, it is not a cardiovascular tooling DFM review. Generic corner-radius and wall-thickness checks do not catch the failure mode.

CSI — Atherectomy Catheter Tooling DFM

Cardiovascular Systems Inc. (CSI) in Maple Grove runs orbital atherectomy devices for calcified coronary and peripheral artery disease. CSI’s catheter tooling DFM requirements include precision-machined catheter component geometry review for assembly stack tolerance, material selection for catheter hardware that must survive chemical sterilization cycles, and GD&T callout analysis for components that interface with atherectomy crown geometry. CSI tooling programs have their own supplier-quality documentation expectations that mirror Boston Scientific’s rigor.

RivCut provides DFM reviews for CSI catheter tooling with the same cardiovascular-specific depth as WATCHMAN and stent tooling — geometry, material, GD&T, and machining-parameter risks all addressed in writing within 24 hours.

CSI AtherectomyCatheter ToolingTolerance Stacks
Insider tip: Chemical sterilization-cycle dimensional behavior is a DFM-stage material-selection decision. Fix material before the verification tooling is cut, not after the first sterilization lot fails dimensional inspection.

Nitinol Tooling DFM — A Maple Grove Specialty

Nitinol tooling design is a niche DFM category all its own. WATCHMAN mandrels and heat-setting fixtures require understanding of nitinol’s superelastic and shape-memory properties, the Af (austenite finish temperature) dependence on heat-setting mandrel geometry, the effect of surface work-hardening on nitinol Af uniformity, and the interaction between mandrel OD tolerance, expansion-cycle count, and mandrel wear. Only Maple Grove and a small number of other cardiovascular corridors concentrate enough nitinol tooling demand to make this a named DFM service line.

RivCut DFM for nitinol tooling covers mandrel OD profile, surface finish requirements, machining-parameter risk for subsurface work-hardening, and material selection for the mandrel shaft and heat-setting fixture substrate.

Nitinol ASTM F2063Shape-MemoryAf Transformation
Insider tip: Mandrel surface work-hardening from aggressive machining parameters shifts the nitinol Af by 2–5°C locally, creating non-uniform transformation at the mandrel OD contact zone. Validate surface integrity before committing to production tooling parameters.
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