diff --git a/crates/fj-core/src/geometry/surface.rs b/crates/fj-core/src/geometry/surface.rs
index 74cc9f2ba..2754979c9 100644
--- a/crates/fj-core/src/geometry/surface.rs
+++ b/crates/fj-core/src/geometry/surface.rs
@@ -4,7 +4,6 @@ use fj_math::{Aabb, Point, Scalar, Transform, Triangle, Vector};
 
 use super::{
     traits::{GenPolyline, GenTriMesh},
-    util::tri_mesh::convert_vector_surface_to_global,
     Path, Tolerance,
 };
 
@@ -19,15 +18,6 @@ pub struct SweptCurve {
 }
 
 impl SweptCurve {
-    /// Convert a vector in surface coordinates to model coordinates
-    pub fn vector_from_surface_coords(
-        &self,
-        vector: impl Into<Vector<2>>,
-        tolerance: impl Into<Tolerance>,
-    ) -> Vector<3> {
-        convert_vector_surface_to_global(self, vector, tolerance)
-    }
-
     /// Transform the surface geometry
     #[must_use]
     pub fn transform(self, transform: &Transform) -> Self {
diff --git a/crates/fj-core/src/geometry/util/tri_mesh.rs b/crates/fj-core/src/geometry/util/tri_mesh.rs
index 815a76e4b..a6810fbb6 100644
--- a/crates/fj-core/src/geometry/util/tri_mesh.rs
+++ b/crates/fj-core/src/geometry/util/tri_mesh.rs
@@ -36,8 +36,10 @@ mod tests {
     use pretty_assertions::assert_eq;
 
     use crate::geometry::{
-        util::tri_mesh::convert_point_surface_to_global, Path, SweptCurve,
-        Tolerance,
+        util::tri_mesh::{
+            convert_point_surface_to_global, convert_vector_surface_to_global,
+        },
+        Path, SweptCurve, Tolerance,
     };
 
     #[test]
@@ -73,7 +75,7 @@ mod tests {
         let tolerance = Tolerance::from_scalar(1.).unwrap();
 
         assert_eq!(
-            surface.vector_from_surface_coords([2., 4.], tolerance),
+            convert_vector_surface_to_global(&surface, [2., 4.], tolerance),
             Vector::from([0., 4., 8.]),
         );
     }
diff --git a/crates/fj-core/src/operations/sweep/path.rs b/crates/fj-core/src/operations/sweep/path.rs
index ad60619a1..3a619a184 100644
--- a/crates/fj-core/src/operations/sweep/path.rs
+++ b/crates/fj-core/src/operations/sweep/path.rs
@@ -2,7 +2,10 @@ use fj_math::{Circle, Line, Vector};
 
 use crate::{
     geometry::{
-        util::tri_mesh::convert_point_surface_to_global, Path, SweptCurve,
+        util::tri_mesh::{
+            convert_point_surface_to_global, convert_vector_surface_to_global,
+        },
+        Path, SweptCurve,
     },
     operations::build::BuildSurface,
     storage::Handle,
@@ -73,10 +76,16 @@ impl SweepSurfacePath for Path<2> {
                     circle.center(),
                     core.tolerance(),
                 );
-                let a = surface
-                    .vector_from_surface_coords(circle.a(), core.tolerance());
-                let b = surface
-                    .vector_from_surface_coords(circle.b(), core.tolerance());
+                let a = convert_vector_surface_to_global(
+                    surface,
+                    circle.a(),
+                    core.tolerance(),
+                );
+                let b = convert_vector_surface_to_global(
+                    surface,
+                    circle.b(),
+                    core.tolerance(),
+                );
 
                 let circle = Circle::new(center, a, b);
 
@@ -88,7 +97,8 @@ impl SweepSurfacePath for Path<2> {
                     line.origin(),
                     core.tolerance(),
                 );
-                let direction = surface.vector_from_surface_coords(
+                let direction = convert_vector_surface_to_global(
+                    surface,
                     line.direction(),
                     core.tolerance(),
                 );