O-RINGS
Cryogenic Deflashing for Molded O-Rings
Parting-line flash on an O-ring sits exactly where the sealing happens. Nitrofreeze removes it — inside diameter included — without a blade ever nearing the sealing surface.
Can molded O-rings be cryogenically deflashed?
Yes — Nitrofreeze cryogenically deflashes molded O-rings at its Worcester, Massachusetts facility, in nitrile, EPDM, Viton®/FKM, silicone and other elastomers — from micro O-rings with thin cross-sections to large-diameter rings, and from a handful of prototypes to tens of thousands of parts.
Will deflashing affect the sealing surface or cross-section?
No. The Nitrofreeze process does not affect surface finish, geometry, or the material itself. The flash is embrittled and broken at its root, so the cross-section, surface finish and compression behaviour the seal depends on are unchanged.
What about flash on the inside diameter?
Internal-diameter flash is the classic case for this process — it is out of reach of a blade without risking the sealing surface. The Nitrofreeze process carries media through and around the part, so IDs and parting lines are deflashed in one cycle.
Can Nitrofreeze handle high-volume and mixed O-ring orders?
Yes. The process is computer-controlled and each part number runs to its own documented recipe, so every O-ring in a batch — and every repeat order — sees the same cycle. There is no minimum order quantity, and separate part numbers run as separate documented lots.
How small — and how large — can parts be?
Nitrofreeze processes parts from 0.025″ with thin walls up to 12″ × 12″ in its cryogenic machines — and there is no upper limit on part size: larger parts route to dry ice deflashing or hand finishing. There is no minimum order quantity; runs are subject to a $125 minimum lot charge.
What’s the turnaround and typical cost?
The first run of a new O-ring part is treated as a sample: five-day turnaround, free, as Nitrofreeze’s Pre-Production Engineering Evaluation. Once the customer approves the process, production orders turn around in as little as two days after receipt, with same-day and one-day service available for a small premium. Large volume orders typically require more time to process. Deflashing typically runs 10–20% of the value of the part.
Is Nitrofreeze ITAR registered and ISO certified?
Yes. Nitrofreeze is registered with the U.S. Department of State’s Directorate of Defense Trade Controls (DDTC) as a manufacturer/exporter under the International Traffic in Arms Regulations (ITAR), and is certified to ISO 9001:2015 by NQA with a scope that names cryogenic deburring and deflashing. View the ISO certificate.
Send us your O-rings
The first run is a free Pre-Production Engineering Evaluation — five days, no obligation, with the process documented before you commit.
Nitrofreeze Cryogenic Solutions · 78 Chilmark Street, Worcester, MA 01604