Closed STEP stock block: 40 × 30 × 20 mm
One closed faceted BREP with six planar faces. Triangulation yields 12 triangles, eight unique geometric positions, bounds 0,0,0 to 40,30,20 mm, surface area 5,200 mm² and volume 24,000 mm³. Hard-normal vertices may be duplicated.
ISO-10303-21;
HEADER;
FILE_DESCRIPTION(('Novus Examples deterministic closed solid'),'2;1');
FILE_NAME('stock-block-40x30x20.step','2026-09-08T00:00:00',('Novus Examples'),('Novus Examples'),'deterministic writer','Novus Examples','');
FILE_SCHEMA(('CONFIG_CONTROL_DESIGN'));
ENDSEC;
DATA;
#1=APPLICATION_CONTEXT('configuration controlled 3d designs of mechanical parts and assemblies');
#2=APPLICATION_PROTOCOL_DEFINITION('international standard','config_control_design',1994,#1);
#3=PRODUCT_CONTEXT('',#1,'mechanical');
#4=PRODUCT('NVS-BLOCK-40-30-20','Fictional rectangular stock block','', (#3));
#5=PRODUCT_DEFINITION_FORMATION_WITH_SPECIFIED_SOURCE('','',#4,.NOT_KNOWN.);
#6=PRODUCT_DEFINITION_CONTEXT('part definition',#1,'design');
#7=PRODUCT_DEFINITION('design','',#5,#6);
#8=PRODUCT_DEFINITION_SHAPE('','',#7);
#9=(LENGTH_UNIT() NAMED_UNIT(*) SI_UNIT(.MILLI.,.METRE.));
#10=(NAMED_UNIT(*) PLANE_ANGLE_UNIT() SI_UNIT($,.RADIAN.));
#11=(NAMED_UNIT(*) SI_UNIT($,.STERADIAN.) SOLID_ANGLE_UNIT());
#12=UNCERTAINTY_MEASURE_WITH_UNIT(LENGTH_MEASURE(1.E-7),#9,'distance_accuracy_value','');
#13=(GEOMETRIC_REPRESENTATION_CONTEXT(3) GLOBAL_UNCERTAINTY_ASSIGNED_CONTEXT((#12)) GLOBAL_UNIT_ASSIGNED_CONTEXT((#9,#10,#11)) REPRESENTATION_CONTEXT('',''));
#14=CARTESIAN_POINT('',(0.0,0.0,0.0));
#15=CARTESIAN_POINT('',(40.0,0.0,0.0));
#16=CARTESIAN_POINT('',(40.0,30.0,0.0));
#17=CARTESIAN_POINT('',(0.0,30.0,0.0));
#18=CARTESIAN_POINT('',(0.0,0.0,20.0));
#19=CARTESIAN_POINT('',(40.0,0.0,20.0));
#20=CARTESIAN_POINT('',(40.0,30.0,20.0));
#21=CARTESIAN_POINT('',(0.0,30.0,20.0));
#22=POLY_LOOP('',(#14,#17,#16,#15));
#23=FACE_OUTER_BOUND('',#22,.T.);
#24=DIRECTION('',(0.0,0.0,-1.0));
#25=DIRECTION('',(0.0,1.0,0.0));
#26=AXIS2_PLACEMENT_3D('',#14,#24,#25);
#27=PLANE('',#26);
#28=FACE_SURFACE('',(#23),#27,.T.);
#29=POLY_LOOP('',(#18,#19,#20,#21));
#30=FACE_OUTER_BOUND('',#29,.T.);
#31=DIRECTION('',(0.0,0.0,1.0));
#32=DIRECTION('',(1.0,0.0,0.0));
#33=AXIS2_PLACEMENT_3D('',#18,#31,#32);
#34=PLANE('',#33);
#35=FACE_SURFACE('',(#30),#34,.T.);
#36=POLY_LOOP('',(#14,#15,#19,#18));
#37=FACE_OUTER_BOUND('',#36,.T.);
#38=DIRECTION('',(0.0,-1.0,0.0));
#39=DIRECTION('',(1.0,0.0,0.0));
#40=AXIS2_PLACEMENT_3D('',#14,#38,#39);
#41=PLANE('',#40);
#42=FACE_SURFACE('',(#37),#41,.T.);
#43=POLY_LOOP('',(#15,#16,#20,#19));Specifications
- Units
- mm
- Closed Solids
- 1
- Planar Faces
- 6
- Vertices
- 8
- Triangles
- 12
- Synthetic
- true
- Reader
- occt-import-js 0.0.23
Testing contract
Expected to pass- Scenario
- Import the closed manufacturing stock block into a CAD reader and compare independently triangulated geometry with the companion expectations.
- Expected result
- One closed faceted BREP with six planar faces. Triangulation yields 12 triangles, eight unique geometric positions, bounds 0,0,0 to 40,30,20 mm, surface area 5,200 mm² and volume 24,000 mm³. Hard-normal vertices may be duplicated.
What is a .step file?
STEP (Standard for the Exchange of Product model data) is an ISO 10303 CAD format that stores precise boundary-representation solid geometry and product data as structured text. Unlike mesh formats, it preserves exact curves and surfaces for engineering use. It is the leading neutral format for mechanical CAD interchange.
How to use this file
Use an example STEP file to test CAD B-rep parsing, precise-geometry import, and interoperability tooling between mechanical design and CAM applications.
How to use this file for testing
“Closed STEP stock block: 40 × 30 × 20 mm” is a deterministic Testaroo fixture for Data import. Realistic faker-generated datasets with documented schemas for testing import and ETL flows.
Documented properties for this file: STEP · 3,203 bytes. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such, expect parsers to fail loudly rather than silently accept them.
3D and CAD fixtures carry one small, documented solid or scene. Convert and inspect against the known geometry, units, and structure; format twins let you diff interchange fidelity, and the 3D viewer previews the actual mesh.
Generated by generation/business_cad.py. Free for any use, no attribution required, license.
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