HX standard, HD and VHD are different configurations.
Compare the complete kit before you choose a heavy-duty label or plan a pivot upgrade.
The short answer
The standard-pivot HX, HX with HD pivot and HX with VHD pivot have different published load and display-depth conditions. The kit with the largest-sounding name is not automatically right for a lighter display. This page compares complete desk-arm kits; it does not establish that you can swap their pivots.
| Exact desk-arm kit | Published load | Depth / scope condition | C-clamp thickness | Evidence |
|---|---|---|---|---|
| Ergotron HX with HD Pivot (45-647-224)US · 45-647-224 | 12.7–19.1 kg | 152–304 mm; 1000R scopeOther installation conditions still apply. | 10–66 mmCurrent HX clamp drawing has two installation positions:10-41mm and28.5-66mm. Confirm your supplied clamp revision; older attachment guides show16-66mm. | Load / product Clamp drawing |
| Ergotron HX with VHD Pivot (45-693-224)US · 45-693-224 | 13–17 kg | 231–351 mm; 1000R scopeOther installation conditions still apply. | 10–66 mmCurrent HX clamp drawing has two installation positions:10-41mm and28.5-66mm. Confirm your supplied clamp revision; older attachment guides show16-66mm. | Load / product Clamp drawing |
| Ergotron HX — standard pivot (45-475-026)US · 45-475-026 | 9–19 kg | Above 150 mm: capacity needs clarificationOther installation conditions still apply. | 10–66 mmConfirm supplied HX clamp matches2024drawing. Two mounting positions cover10-66mm; olderguide16-66mm. | Load / product Clamp drawing |
See why the minimum can change the choice
The LS49CG954ENXZA bare panel is 10.6 kg. That is below the recorded HD and VHD lower bounds. Falling inside the standard HX’s headline window still does not resolve its depth-dependent condition.
Read the G95C’s complete comparison →Standard pivot: clarify deep panels
The older specification for the recorded polished-aluminum kit and current product wording do not give us a single reconciled depth rule. The checker requires clarification above the conservative recorded threshold rather than silently using the more permissive wording.
HD pivot: check both windows
The HD sheet combines a load window, physical-depth window and 1000R curved-display scope. Being a 49-inch monitor alone does not satisfy all three.
VHD pivot: inspect the whole assembly
The VHD sheet addresses deeper 1000R displays with its own load window. On the 57-inch G95NC, the required Samsung bracket’s mass remains a separate unknown.
Read the 57-inch case →Can I upgrade an existing HX by swapping the pivot?
This catalog does not contain a verified interchangeability mapping for your existing arm revision and a replacement pivot. Ask Ergotron using both exact part numbers and the supplied arm revision. Do not treat a complete-arm specification as permission to assemble a different combination.
Will all HX clamps fit the same desktop?
The current recorded drawing and older attachment guidance use different lower thickness limits. Verify the actual supplied clamp and its installation position. A range match does not establish the desktop’s strength or permission to clamp it.
Check a complete recorded configuration →Manufacturer evidence
Published specifications are the basis of these checks. We have not physically tested these installations. Sources apply to the recorded US configuration unless noted.
- Ergotron — HX with HD pivot: load and depth specificationReviewed 2026-10-25
- Ergotron — HX with VHD pivot: load and depth specificationReviewed 2026-10-25
- Ergotron — Recorded standard-pivot HX specification sheetReviewed 2026-10-26
- Ergotron — HX clamp dimension drawingReviewed 2026-10-26
- Samsung — G95C LS49CG954ENXZA specification sheetReviewed 2026-10-25
- Samsung — G95NC exact-US-model mounting manual archiveReviewed 2026-10-26