GEARBOX 550 466 28 / 55046628 — Sandvik Compatible
GEARBOX is a high-strength aftermarket spare part fully compatible with Sandvik hydraulic drifters and rock drills. Precision CNC-machined to original-part tolerances. Contact us for stock and delivery on OEM number 550 466 28.
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GEARBOX — OEM 550 466 28 / 55046628
- OEM Number
- 550 466 28
- Also written as
- 55046628
- Compatible Brand
- Sandvik
- Part Type
- Drifter
What the GEARBOX does
Housings and bodies carry the drifter's internal components, hold their alignment under impact and form part of the hydraulic circuit through their internal galleries. They are the structural reference everything else is measured from.
Signs it needs replacing
- Bores worn oval, stepped or scored
- Cracks radiating from bolt holes or port faces
- Persistent external leaks at a joint face that has been resealed
- Repeat bushing or seal failures that no replacement fixes
Before you fit it
Check bore condition and sealing-face flatness before rebuilding into a housing. A worn housing bore is the reason a rebuilt drifter fails early, and it is the one thing a seal and bushing kit cannot correct.
General guidance for this class of component. Always work to the torque figures, clearances and service intervals in your machine's own manual.
About This Part
Which machines does GEARBOX (OEM 550 466 28) fit?
It is used on Sandvik hydraulic rock drills and drifters. Models we already carry parts for: HL1560 ROCK DRILL (DRIFTER), HL300 ROCK DRILL (DRIFTER), HL710 ROCK DRILL (DRIFTER), HL820T ROCK DRILL (DRIFTER), RD314 ROCK DRILL (DRIFTER), RD525 ROCK DRILL (DRIFTER). If yours is not listed, send us the OEM number and we will confirm the fit.
How should I write the OEM number?
This part number is written two ways: 550 466 28 (spaced) and 55046628 (unspaced). Both refer to the same part, and the site search finds either spelling.
Is this an original Sandvik part?
No. This is an aftermarket part manufactured by KY Rock Drill and CNC-machined to original-part tolerances. We are not affiliated with or an authorised dealer for Sandvik; the OEM number is quoted only to identify compatibility.



