Ergotron Classic LX: identify the arm and fixing kit

An arm can move the display while releasing the original stand's footprint, but the useful purchase is the exact arm and its fixing kit. Start with the part number if you own a Classic LX or are considering an older listing. The name LX alone cannot tell you which mount is supplied or which display range applies.

Keep an existing arm whose exact screen and mounting combination is confirmed. For a different screen or an incomplete kit, retain the monitor stand while checking the part and geometry. This historical guide compares dated Classic and LX Pro references; current US Classic stock and seller support remain unconfirmed.

Classic and Pro are separate part records

The Classic sheet printed 08.09.2024 identifies 45-241-026, polished aluminum/black, with the standard 2-piece clamp. The USA/Canada LX Pro sheet, revision 260021revC, printed 05.06.2026 separately identifies 45-682-292, matte black, 2-piece clamp.

The Pro reference reaches a lower minimum supported display weight but also has a lower maximum than the Classic reference. Check both ends of the matching range. A broader tilt description does not establish usable movement with the chosen screen, and a lift field does not supply a floor-to-screen position.

The Classic row lists an arm, extension, base, pole and hardware. That inventory belongs to the dated part row, not every Classic box or reseller offer. Confirm the exact fixing kit instead of transferring a grommet inclusion between families.

The dated Classic sheet is not a current US inventory record. Confirm the exact offered part, complete kit, condition and support terms separately.

A weight match is not a curved-screen approval

Dell's US U4025QW specification separates the display without its stand and cables from the complete monitor. Use the appropriate suspended-display record and account for the accessories, adapters and cables actually carried by the arm. A figure for the monitor with its stand is a different input.

Check the mounting pattern, display depth and shape as well as weight. The U4025QW is a large curved display; matching a nominal weight range and fixing pattern does not establish the torque, plate access or useful movement of the assembly.

An indexed Australian Pro 45-682-292 reference, checked October 13, warns that deeper displays may affect capacity. Its depth threshold and clamp field belong to that regional Pro record. They are not a new supported-weight calculation, a US-selected-kit approval or a Classic specification.

Obtain the exact arm's readable installation instructions and approval for the desk material, edge and fixing location. A nominal thickness match cannot settle hollow construction, under-edge obstructions or complete kit contents. No Classic mounting limit is adopted from its unreadable installation drawing or a separate low-profile variant.

Use the observed device result, then verify the mounting

The exact US Mount Finder record for Dell U4025QW was selected in United States/English and reload-verified on October 13, 2026. Its device fields include weight, mounting pattern, depth and size. Those are manufacturer records, not our measurements or approval of an installed arrangement.

The observed Suggested Top Products list contained ten entries. Rendered cards included MX Wall Monitor Arm 45-228-026, LX Sit-Stand Wall Arm 45-383-026, and LX Sit-Stand Desk Arm 45-384-026. For a desk-mounted option, the Sit-Stand Desk card is a specific manufacturer-suggested reference to assess separately: it is neither Classic 45-241-026 nor Pro 45-682-292.

Classic 45-241-026 and Pro 45-682-292 did not appear in those ten displayed suggestions. That does not prove incompatibility or absence from the full catalog. Do not transfer the Sit-Stand part's range or mounting kit to either one, or treat a suggestion as approval of an actual desk.

Use the linked device record as the next reading step. Before replacing the stand, obtain the chosen part's mounting instructions and top-material/edge approval, inspect hardware completeness, and draw the required screen/cable movement at all desk heights. Keep the stand until those questions are resolved. No selected kit, price, stock or installed fitting is established by these suggestions.

For the monitor's separate configuration, read the U4025QW guide; for a changing screen arrangement, use dual monitor versus ultrawide. Plan cable routing after the mount geometry is identified.

Sources and dated limits

The two specification PDFs and Dell's US fields were read on October 13, 2026; the printed sheet dates and regional scopes are retained above. They are manufacturer specifications, not DeskSpaceLab tests of sag, adjustment effort or stability.

• Classic LX specification sheet, pages 1–2 — 45-241-026 standard-clamp column; no low-profile mounting limits transferred.
• LX Pro Americas specification sheet, pages 2–3 — Desk Arm fields and separate clamp/grommet part numbers.
• Dell U4025QW US specification — bare weight, chassis and VESA fields.
• Indexed Australia Pro reference — regional depth warning and thickness field, checked October 13 from a crawl about two weeks earlier; not a US mounting approval.
• Exact US Dell U4025QW Mount Finder record — native US/English selection and reload verified October 13; ten displayed suggestions, not a fitted test or quote.

The Classic installation PDF yielded corrupt-font text and ambiguous drawing placement; no visual installation page was read and no clamp/grommet diagram limit is adopted. The broader catalog was not read or used. Current US Classic stock, complete seller kits and support eligibility remain unknown; the actual desk fixing, selected assembly and usable movement remain unconfirmed.