CAD-Bench
TASKS · pilot subset

70 prompts across 20 categories

Each task carries a verbatim natural-language prompt, a canonical reference STEP (sha-256 in the listing), numerical ground-truth quantities (volume, surface area, Euler χ, genus, named features), and a difficulty class 1-5. Click a task to see the held-out reference, candidate output viewers, and metric scores per agent.

Geometric Primitivesw = 0.10 · 7/24 shown

PRIM-001Hollow cylinder (60 × 40 × 100)d1/5PRIM-007Right hexagonal prism with pitch filletd2/5PRIM-002Sphere with planar capd1/5PRIM-003Right truncated cone (frustum)d1/5PRIM-004Square-base pyramid frustumd1/5PRIM-005Tilted-axis box (30°)d2/5PRIM-009Hollow torus (Ø100 mean × Ø8 tube, 1 mm wall)d4/5

Boolean Robustnessw = 0.20 · 5/18 shown

BOOL-003Coplanar-face union (knife-edge stress)d4/5BOOL-009High-genus subtraction (lattice block)d5/5BOOL-001Tangent cylinder onto cube (line-of-contact)d4/5BOOL-002Two interpenetrating spheres (lens intersection)d2/5BOOL-005ε-offset extrusion (sliver-face stress)d5/5

BREP Fidelityw = 0.40 · 4/14 shown

BREP-004NURBS-handle goblet (G2 swept loft)d4/5BREP-001Periodic-spline cylinder (closed in U)d4/5BREP-002G1-only loft (tangent discontinuity)d4/5BREP-007Trimmed sphere with hole through poled4/5

Free-form Surfacesw = 0.30 · 3/12 shown

SURF-002Compressor blade (NACA 65-(12)10)d5/5SURF-001Ergonomic mug handle (revolved spline)d3/5SURF-007Mouse top-shell (Class-A)d5/5

Parametric Mechanical Partsw = 0.25 · 7/30 shown

MECH-014L-bracket with M6 + slotted holed3/5MECH-022Stepped shaft with retaining-ring grooved4/5MECH-027Planetary-gear carrier plated5/5MECH-002Bearing block — two 6204 deep-groove bearingsd4/5MECH-005Cam-follower lever (eccentric pivot)d3/5MECH-018Heat-set insert boss array (4× M3)d3/5MECH-031Threaded cap with diamond knurld5/5

Assembly & Matingw = 0.22 · 5/16 shown

ASM-005Pin-in-hole, H7/g6 sliding fitd3/5ASM-011Dovetail slide (60° flanks)d4/5ASM-001Threaded coupling M16×1.5 (male+female pair)d4/5ASM-008Spline shaft + hub (DIN 5480 W25×1.25×18)d5/5ASM-013Bayonet quarter-turn mountd4/5

Standards Compliancew = 0.15 · 4/18 shown

STD-002ISO 4762 M8×30 socket-head cap screwd4/5STD-001ISO 7050 self-tapping screw ST4.2 × 16d4/5STD-005ISO 8734 dowel pin Ø6 m6 × 30d3/5STD-008ASME B18.6.3 button-head 1/4-20 × 5/8d4/5

Sheet-Metal Bodiesw = 0.13 · 3/14 shown

SHEET-003U-channel bracket, 1.5 mm Al, k=0.40d3/5SHEET-001Box-pan with corner relief cutsd4/5SHEET-0073-bend electronics chassisd4/5

Sealing-Groove Designw = 0.10 · 3/10 shown

SEAL-001AS568-214 face-seal grooved4/5SEAL-004AS568-218 piston-type radial grooved4/5SEAL-007ISO 3601-2 quad-ring face grooved3/5

Kinematic Mechanismsw = 0.15 · 3/12 shown

KIN-002Four-bar linkage, Grashof crank-rockerd5/5KIN-005Geneva drive — 4 stationd5/5KIN-008Planetary gearset full mesh (sun + 3 planets + ring)d5/5

DFM · 3-Axis CNCw = 0.30 · 4/18 shown

DFMCNC-0023-ax-machinable manifold blockd4/5DFMCNC-0054-pocket plate, R 0.5 internal cornersd3/5DFMCNC-009Long-aspect bracket (vise-fixturable)d3/5DFMCNC-0135-axis-only fish-mouth saddled4/5

DFM · Injection Mouldw = 0.30 · 2/20 shown

DFMMOLD-002Injection-mouldable enclosure halfd4/5DFMMOLD-005Telephone handset shelld5/5

DFM · FDM 3D Printw = 0.20 · 3/14 shown

DFMFDM-008FDM-printable hinge (no support)d3/5DFMFDM-002Bridge-test calibration cubed3/5DFMFDM-011Print-in-place hinged4/5

CAM Toolpath Validityw = 0.20 · 2/12 shown

CAM-0015-pocket plate, Ø3 endmill finishd3/5CAM-005T-slot pocket array (Ø 8 + Ø 4 endmills)d4/5

Constraint Solving & Editabilityw = 0.18 · 3/18 shown

PARAM-006Editable flange (bolt circle param sweep)d3/5PARAM-013Editable bracket (length+30 %, hole→M8)d4/5PARAM-009Configurable bottle (height + cap params)d4/5

Reverse Engineeringw = 0.20 · 3/22 shown

REVENG-002Three-view ortho → bracketd4/5REVENG-009Three-view ortho → housing with coresd5/5REVENG-005ABC dataset stepped pulley (multi-view)d4/5

2-D Sketch Constraintsw = 0.10 · 2/20 shown

SKETCH-003Tangent-arc transition profiled2/5SKETCH-014Symmetric four-bar profiled2/5

Functional Intent · FEA-Gatedw = 0.25 · 3/16 shown

FUNC-001Cantilever bracket — 250 N tip load, 6061-T6, SF≥4d5/5FUNC-007Heat-sink fin array for 25 W TO-220d5/5FUNC-003Heat-sink for 60 W CoB LEDd5/5

Paraphrase Robustnessw = 0.15 · 2/20 shown

PARA-0015× paraphrased L-bracketd3/5PARA-0055× paraphrased planetary carrierd4/5

Confidence Calibrationw = 0.12 · 2/15 shown

CAL-003Confidence-calibrated planetary carrierd5/5CAL-007Confidence-bracketed mounting flanged3/5