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 Novus Examples 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.
Related files
- jsonStock block geometry — expected results and reader evidenceOne 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.
- csv10,000-Row CSVA CSV with 10,000 data rows — for testing streaming parsers, memory handling, and import performance.
- zipAlder Books Reconciliation — Blank input table templatesBlank input table templates for Alder Books Reconciliation. 6 header-only CSV templates and one setup guide. No filled sample records or executable content.
- xlsxAlder Books Reconciliation — Editable operating workbookEditable operating workbook for Alder Books Reconciliation. Native sheets preserve 102 source records, 3 calculated headline metrics and one editable chart. Net cash change=5,236.00 USD; Journal debits=9,364.00 USD; Journal credits=9,364.00 USD.
- csvAlder Books Reconciliation — Generic primary records CSVGeneric primary records CSV for Alder Books Reconciliation. 24 generic records with stable primary keys. Map the documented fields before importing into another platform.
- jsonAlder Books Reconciliation — Intentionally invalid semantic test recordsIntentionally invalid semantic test records for Alder Books Reconciliation. Three independent cases report duplicate-primary-key, schema-type and foreign-key errors. JSON syntax remains valid.
Generated by generation/business_cad.py. Free for any use, no attribution required, license.