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DANFOSS / EATON BUNA N 70 ORING

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Description & Features

Designed for use in Eaton Char-Lynn hydraulic motors and related assemblies, this Buna N 70 O-ring serves as a reliable sealing component in fluid power systems where resistance to petroleum-based fluids is required. Buna N (nitrile) rubber at a 70 durometer hardness provides a balance of flexibility and compression resistance suited to dynamic and static sealing applications in hydraulic equipment.

The Danfoss / Eaton Buna N 70 O-Ring is an OEM-grade spare part available in a variety of sizes, making it applicable across a range of Eaton Char-Lynn motor configurations. As a genuine Eaton Char-Lynn component, it is intended as a direct replacement to maintain original sealing integrity during maintenance and rebuilds.

SKU: 0008761-012

Supplier Part Number (MPN): 8761-012

Specifications

Diameter
0.364 in ID x 0.504 in OD
nmfc
125820
Product Type
O-ring
Segment Code
C
Suitable For Use With
Piston Pumps

Product Questions & Answers (2)

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Question by: Jean P on Aug 16, 2025, 9:45 AM
these are buna n material, right? just want to make sure before i order a handful of em for our motor rebuilds
Answer by: Customer Support on Aug 18, 2025, 6:05 AM
Buna N is correct. The 70 in the name refers to the durometer hardness, which is a standard Shore A rating for general-purpose hydraulic sealing applications. Buna N at that hardness holds up well against petroleum-based hydraulic fluids, which makes it a common go-to for Char-Lynn and Danfoss motor service work.
Question by: Dustin S on Sep 6, 2025, 9:43 PM
i’m trying to match up an o-ring, is this one actually a Buna-N 70 seal?
Answer by: Customer Support on Sep 8, 2025, 7:01 PM
Built as a Danfoss and Eaton spare part, this is a Buna-N 70 O-ring under the Eaton Char-Lynn brand.

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