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The manufacturers' catalogs will say no. The dimensional reality is more nuanced — and understanding exactly where dimensions converge and diverge prevents both false economies and unnecessary rejections. Atlas Copco and Sandvik percussion bores are not the same diameter, but several O-ring positions in the rotation circuit use ISO 3601 standard cross-sections that produce genuine cross-compatibility within the 0.08 mm tolerance band. The key is knowing which positions are model-specific and which are standard.
Where cross-compatibility breaks down completely: percussion seals. The percussion bore diameter, stroke length, and operating pressure are specific to each brand and model — and in many cases, to each model generation within a brand. An RD18U percussion seal does not fit an RD22U. An HLX5T percussion seal doesn't fit an RD525. The piston rod seal geometry differs between the T38 and T45 shank adapter configurations on the same drifter platform. Trying to cross-reference percussion seals without OEM dimensional data and a caliper produces one of two outcomes: a loose fit that bypasses immediately, or an oversized seal that can't be installed without force.
Seal Cross-Compatibility Reference by Circuit Position
|
Seal Position |
Cross-Brand Compatible? |
Cross-Model Within Brand? |
Verification Required |
|
Percussion bore / piston seal |
No — bore diameter and pressure class brand-specific |
No — differs by model even within Atlas Copco or Sandvik |
OEM dimensional drawing required for any substitution |
|
Rotation motor port O-rings |
Partially — many use ISO 3601 standard cross-sections |
Yes within same motor displacement class |
Verify cross-section and ID against ISO 3601 before substitution |
|
Feed cylinder rod seal |
Partially — standardized ISO cylinder rod diameters common across brands |
Yes for same rod diameter and operating pressure class |
Measure rod diameter and check operating pressure before substituting |
|
Accumulator diaphragm |
No — pre-charge pressure and volume are model-specific |
No — even minor model revisions can change diaphragm geometry |
Use OEM part number or verified aftermarket equivalent with documentation |
|
Hydraulic tank breather O-ring |
Yes — most use standard face seal O-rings (AN 6227 or ISO equivalent) |
Yes across brands and models |
Measure OD and cross-section; standard O-ring substitution acceptable |
The practical rule: substitute standard-position O-rings freely after measurement confirmation; never substitute percussion or accumulator seals without OEM dimensional verification. Mixing up one percussion seal from an adjacent model means a second teardown within 50 hours. HOVOO maintains cross-reference tables for Atlas Copco, Sandvik, and LGMRT platforms with documented substitution guidance. Full specifications at hovooseal.com.
