An atraumatic nose cone is a deceptively simple component. It is a soft, tapered polymer tip — typically Pebax in the 25 to 35 Shore D range — bonded or molded to the distal end of a catheter shaft. Its job is to let the device cross tissue and vasculature without trauma. It is one of the smallest parts on a catheter and one of the most consequential.
It is also, until recently, a part you could not buy.
The reason has nothing to do with demand. R&D teams iterate distal tip geometry constantly during early-stage development — outer diameter, taper ratio, lumen, durometer, radiopacity. Each of these parameters affects crossability and bench behavior, and the combinations that work are rarely obvious before testing. The reason has to do with how the tip is made.
Producing a nose cone in medical-grade Pebax means injection molding. Injection molding means a mold. A mold means CNC-machined steel, multi-week machining lead times, and a fixed geometry per tool. For a supplier deciding what to stock on a shelf, this math has never worked: covering the relevant range of sizes, durometers, and additives would require dozens of dedicated steel tools sitting idle most of the time, waiting for orders that may or may not come.
So the supply chain organized itself around services instead of products.
How catheter tips have been built so far
The standard approaches to forming an atraumatic distal tip during early-stage development fall into a few well-established categories.
RF tip forming uses radio-frequency heating and a die to reshape the distal end of an extruded tube. It is fast, repeatable, and produces excellent surface finish. Several specialized service providers operate fleets of RF tipping equipment with extensive die libraries and will run prototype samples on a few-week timeline. The catch is that you are reshaping your own tube — there is no separable tip you can swap, bond, or reuse.
Thermoforming with dedicated tooling is the more traditional path: a custom mold is machined, the tube end is heated and pressed into the cavity, and the result is a tapered tip integral to the shaft. Tip-forming dies live in the catalogs of equipment vendors and specialized manufacturers, and a sufficiently large engineering organization can build its own die library in-house.
Pre-tipped dilator tubing has emerged on prototyping marketplaces in the last few years. Here the tip is extruded into the shaft itself — you buy a tube that already has the soft taper as part of its profile. Convenient, but constrained: the tip material is the same as the shaft material, the geometry is fixed by the extrusion line, and you cannot iterate the tip independently of the rest of the build.
Custom injection-molded tips are the closest analog to a "real" production nose cone, and they are how finished devices are made. The geometry is whatever you want, the material is whatever you want, and the tip is a separate component you bond to your shaft. The cost is the steel mold and the machining time it takes to make it.
Each of these approaches works. None of them allows an engineer to open a browser, configure a tip in three drop-downs, and have an injection-molded Pebax part on the bench a week later — for a single unit, then for ten, then for a different size next month. The combination of off-the-shelf, bondable, real injection-molded medical-grade Pebax, and single-unit availability did not exist as a category. Not because no one wanted it, but because the tooling economics ruled it out.
What changed: 3D-printed molds for low-pressure injection
The bottleneck has always been the steel. Removing the steel changes everything downstream.
3D-printed tooling for injection molding is not a new idea in general engineering — short-run molds in resin or printed metals have been used in consumer plastics for several years. What did not exist, until recently, was a printed mold qualified for low-pressure injection of medical-grade Pebax with the dimensional consistency and surface finish that distal tip components require.
Several constraints make this harder than it sounds. Pebax is a thermoplastic elastomer that needs precise temperature control during injection. Soft grades (25 to 35 Shore D) are particularly sensitive to shear and thermal degradation. The transition geometry of a nose cone — a smooth taper from base diameter to tip with tight tolerances on the lumen — leaves no room for the surface defects that printed tooling typically introduces. And the mold has to survive a meaningful number of cycles without deforming, otherwise the dimensional consistency that justifies injection in the first place is lost.
Solving this required work on three fronts simultaneously: the printable mold material itself, the injection parameters (pressure, temperature, dwell time) calibrated specifically for low-modulus Pebax grades, and the geometry strategy — designing a single nose cone family that scales cleanly across French sizes so a small number of mold variants can cover a meaningful product range.
The result is not a 3D-printed part. The result is a real injection-molded Pebax part, produced from a 3D-printed mold. The distinction matters: 3D-printed Pebax exists as a material, but its bulk properties, surface finish, and inter-layer behavior are nowhere close to those of an injection-molded part. For bench testing that should approximate the behavior of a finished device, only injection molding gives meaningful results.
What this enables for early-stage R&D
The structural change is not "cheaper tips." The structural change is that iteration on distal tip geometry decouples from tooling lead time.
Until now, an early-stage catheter program treating the distal tip as a variable had to either commit to a custom mold per iteration (expensive in time, not just money), or compromise — reuse a tip from an adjacent project, hand-form something with a heat gun, or live with the limitations of a pre-tipped extrusion. None of these gives the engineer what they actually need: a real, repeatable, dimensionally consistent tip with the right durometer and the right geometry, available quickly enough to keep up with the rest of the design loop.
A stocked range of injection-molded nose cones — multiple sizes, multiple Pebax grades, with optional radiopaque or lubricious additives — changes how a tip iteration cycle looks. Instead of placing a tooling order and waiting, the engineer orders three configurations on a Tuesday, has them on the bench the following Tuesday, bonds them to candidate shafts, runs the bench test, and knows by the end of the week which combination is worth pursuing. The tip is no longer the long pole in the iteration loop.
The same approach also restores a capability that early-stage teams rarely have: parallel A/B/C comparisons. Bonding three nose cones of identical geometry but different durometers to three identical shafts, running them through the same crossability test, and comparing the results — this is a basic experimental design that custom tooling makes economically painful. With stocked configurations and per-unit pricing, it becomes routine.
Who built this, and why
The approach described above is the basis of the Protobrix Atraumatic Nose Cones range, developed at Protomed in Strasbourg. Protomed is a contract development organization specialized in minimally invasive devices, and the nose cone range emerged directly from internal catheter projects where the team kept hitting the same iteration ceiling. The qualification work on printed molds for low-pressure Pebax injection was done in-house, on real customer projects, before being productized into a stocked catalog.
The current standard range covers 12 to 24 French, four Pebax durometers from 25 to 72 Shore D, optional BaSO₄ for radiopacity and Propell for lubricity, with a 1.4 mm internal lumen sized for standard guidewires. All parts ship in seven days. The same tooling approach also makes custom dimensions and overmolding on customer shafts producible on the same seven-day timeline — the catalog covers the common cases, but the underlying process is not limited to them.
What still requires the old approach
Off-the-shelf prototyping nose cones do not replace custom production tooling. They replace the iteration phase that precedes it. Once a design has converged and is moving toward verification, validation, and clinical use, the tip needs to be produced under a quality system, in steel tooling, with a documented manufacturing record. That is a different problem with a different answer.
The point of off-the-shelf nose cones is to let the convergence happen faster, on parts that approach the behavior of the finished device closely enough that the bench results mean something. They are bench prototyping components. They are not medical devices, they are not sterile, and they are not intended for clinical or animal use. Using them as such would be a category error — the same kind of category error as expecting a 3D-printed part to behave like a molded one.
What changes is the cost and the time of finding out whether your design is the right one in the first place.
Looking at the standard range: Atraumatic Nose Cones — sizes 12 to 24 French, four Pebax durometers, 7-day lead time.
Need something custom? Different OD, length, lumen, taper, or overmolding directly onto your shaft — same materials, same tolerances, same 7-day lead time. Use the request form on the product page.
