Medical Mold Components

Medical devices mold in high cavitation, to tight tolerances, often in features small enough that the core pin is the part. Precision Core Pins manufactures custom core pins, mandrels, ejector pins, and blades for medical molds to your print, ground as tight as 0.00005 in and made in the USA.

What we make for medical tooling

• Small-diameter and fine-feature core pins where the pin defines the geometry, in diameters down to 0.004 in.
• Pins ground to consistent diameters across high-cavitation tooling.
• Held diameters as tight as 0.00005 in, all custom and made to print.
• Domestic sourcing and replacements made to match the original pin.

Why tight tolerances matter here

Three things make medical tooling demanding on the pins. First, the features are small: a core pin can be the smallest feature in the part, so its diameter and straightness land directly on the dimension that has to stay in spec. Second, the molds run hot, fast, and at high cavitation, so the same pin geometry is repeated across many cavities and many cycles. Third, medical tooling is often validated, so a replacement pin has to reproduce the original dimensions.

The fits in this work live in tenths, and tenths are held by precision grinding, not by turning alone. We grind to consistent diameters pin-to-pin, so each pin in a set matches the others and a replacement set matches the dimensions of the set it replaced.

Built to print, not from a catalog

Send a drawing or a sample and we match it: diameter, length, and point geometry. We reverse-engineer a worn or lost pin from the sample when there is no print. For validated tooling, we reproduce the original dimensions, whether that is a single replacement or a full repeat set.

Frequently asked questions

Can you match pins for validated medical tooling? Yes. Send the print or a sample pin and we reproduce the original diameter, length, and geometry so it matches the original dimensions.

How small a core pin can you make? We grind core pin diameters down to 0.004 in, which covers the fine-feature work medical molding runs into. Send the print and we will confirm what we can hold for your part.

What tolerance can you hold on small medical pins? We hold ground diameters as tight as 0.00005 in. The exact tolerance depends on the feature, so send your print and we will confirm what we can hold.

Request a quote

Send your print or sample. Call (714) 540-5621 or request a quote.