Geometry & modeling
Lightweight component
Definition
A lightweight component is an assembly part or subassembly loaded with only a subset of its model data, while additional data is loaded when an operation requires it. The technique can reduce opening and rebuild work without deleting the authoritative component.
Also known as: lightweight assembly component
Updated
What remains available#
SOLIDWORKS Design Help 2026 distinguishes lightweight components from fully resolved ones. A fully resolved component loads all model data; a lightweight component loads a subset and retrieves more data when needed.
The documentation lists common assembly operations that can work without resolving every component, including selection, mates, measurements, section views, mass properties, interference detection, annotations, and dimensions. Editing a part or feature resolves that component because the operation needs its full model data.
Lightweight is not suppressed#
A lightweight component remains an active member of the assembly. A suppressed component is removed from the active assembly calculation and cannot be selected or used there. Confusing the two can hide a part from the very check the assembly was opened to perform.
Lightweight loading should therefore be treated as a performance state, not a different engineering revision. Resolve stale components and load the data required by the release task before trusting drawings, exports, or downstream manufacturing work.
Sources
Related terms
Assembly
An assembly is a CAD model made of multiple parts or subassemblies positioned relative to each other with mates or joints. Assemblies are where fit, clearance, interference, and motion get checked.
Engineering revision
An engineering revision is an identified, approved state of a part, assembly, drawing, or release package. Unlike an ordinary saved version, a revision communicates a controlled design change to manufacturing, purchasing, quality, and other downstream users.