ISO 53 / DIN 867 Metric Gear Profile Standard 1:1 DXF · SVG · PDF Default Spec: 96 × 20 × 24 mm (T=6mm)

Parametric Involute Spur Gear & Center Bore CAD Generator (1:1 DXF & SVG)

1:1 CAD ENGINE READY

Parametric Involute Spur Gear & Center Bore CAD Generator (1:1 DXF & SVG)

1CAD Style & Material SetupMechanical

Select CAD Style / Model (36)Search & Filter

Material Stock Preset (Auto-Sets Caliper T & Kerf K)

Display Units

Scale Lock

1:1 True Scale

2Dimensions (1:1)Millimeters (mm)

Pitch Diameter (D_p mm)96 mm

Center Shaft Bore (Ø mm)20 mm

Number of Teeth (Z / N)24 teeth

Thickness (T mm)

Laser Kerf (K mm)

3Brand Logo & 1:1 ExportZero Login

2D & 3D Brand Logo Mockup:

📤 Upload Logo

Print Artwork Bleed Guide:

Embed Spec Sheet & 50mm / 1" Scale Bars (Added on separate DIMENSIONS layer)

Pre-Flight Geometry Audit8/8 PASSED

PASS
Closed Outer Contours: 2 closed LWPOLYLINE cut loop(s) verified
PASS
Zero Duplicate Cut Paths: 128 unique segments (0 laser double-burns)
PASS
Flute & Kerf Tolerance Guard: T=6.00mm, K=0.120mm within structural limits
PASS
ISO Layer Color Separation: CUT (Red), CREASE (Blue), SCORE (Emerald), DIMENSIONS isolated
PASS
1:1 Physical Unit Header: Explicit mm/in SVG viewBox + DXF $INSUNITS=4 + 50mm PDF bar
PASS
Exact 2D Cut Bounding Parity: Cut Bounds 103.78×103.78mm === Blank Size
PASS
2D ↔ 3D Kinematic Model Sync: Archetype 'spur_gear_flange' synced (1 3D component(s))
PASS
True Vector Sheet Nesting Sync: 1:1 vector paths mapped to multi-up sheet grid

100%

CUT (0.67m) CREASE/SCORE (0.30m)● 2 Loops · Est. Cut: ~41s

1:1 Synced · Blank: 103.78 × 103.78 mm

2D 1:1 Unfolded Vector BlueprintBlank: 103.78 × 103.78 mm (4.09" × 4.09")

3D Interactive Fold & Orbit (Kraft Board)

288°

0%100%

Camera:

Yaw: -28°Pitch: 24°

⟳ Drag Anywhere to Rotate 3DL=96 × W=20 × H=24mm

Outside Diameter (OD)

104.00 mm

Pitch Diameter (PD)

96.00 mm

Gear Module (m)

4.000 mm

Tooth Count (Z)

24 Teeth

Structural & Manufacturing Specification Summary

Quick Default Download: ↓ .DXF ↓ .SVG ↓ .PDF

Designing a functional mechanical spur gear for laser cutting, CNC routing, waterjet, or 3D printing requires strict adherence to ISO 53 gear geometry where the Pitch Diameter (D_p), Tooth Count (Z), and Metric Module (m = D_p / Z) govern tooth meshing. Two gears will only mesh smoothly if they share the exact same Module (m) and Pressure Angle (20 degrees), with their center-to-center shaft distance set to (D_p1 + D_p2) / 2. Our parametric CAD engine generates a 100% closed outer tooth profile (`CUT` layer), concentric center shaft bore (`CUT` layer), and reference Pitch Circle (`CREASE` layer).

CUT LAYER #EF4444 (ACI 1)

CREASE / BEND #2563EB (ACI 5)

SCALE HEADER $INSUNITS=4 (1:1 mm)

SIMULATION 2D + 3D + Nesting

Pre-Calibrated Industry Sizes (2)

Standard Product Presets Built on This Involute Spur Gear CAD Engine

48 × 8 × 24 mm (T=6mm)

M2.0 24-Tooth Spur Gear (8mm Bore)

48.0 mm Pitch Circle Diameter (52.0 mm Outside Diameter), Z=24 Teeth, Module m=2.0 mm, α=20°

Load Preset Spec →

90 × 20 × 36 mm (T=5mm)

36-Tooth Module 2.5 Spur Gear

ISO 53 Module m = 2.5 mm, Z = 36 Teeth, Pitch Circle Ø90.0 mm, Outside Tip Ø95.0 mm

Load Preset Spec →

Structural Geometry & Allowances

Mathematical Blank & Tolerance Formulas

Metric Gear Module (m)

m = Pitch_Diameter (L) / Tooth_Count (H)

Fundamental tooth size index in millimeters. Two mating gears MUST have the exact same Module (m).

Outside Tip Diameter (OD / Addendum Circle)

OD = Pitch_Diameter + 2 * m = m * (Z + 2)

Adds one module (1.0 * m) of addendum height to each side of the pitch circle.

Root Dedendum Diameter (D_root)

D_root = Pitch_Diameter - 2.5 * m

Provides 1.25 * m root depth (including 0.25 * m bottom clearance) so mating gear tips never bottom out.

Pre-Press & Production SOP

Step-by-Step Export & Assembly Guide

1 Enter the desired Pitch Diameter in mm (in the Length L field, e.g., 96mm), Center Shaft Bore Diameter in mm (in the Width W field, e.g., 16mm), and Number of Teeth Z (in the Height H field, e.g., 24 teeth -> gives Module m = 4.0).
2 Inspect the closed tooth profile, center bore hole, and blue dashed Pitch Circle in the 2D CAD view.
3 To create a mating pinion gear that meshes with your first gear, keep the ratio (L / H = Module m) identical—for example, for a 2:1 reduction with m=4, set L=48mm and H=12 teeth.
4 Export as 1:1 .DXF or .SVG with Dimensions unchecked to cut directly on your laser cutter, waterjet, or CNC.

Board Caliper, Laser & Die-Cutting Reference

Material Thickness, Creasing Matrix & Laser Kerf Settings

Material / Sheet Stock	Caliper Thickness (T)	Recommended Tooling / Laser Setup	Allowance / Kerf Spec	Primary Use Case
Delrin / Acetal Homopolymer (POM) Sheet	3.0 – 10.0 mm	CO2 Laser or CNC Endmill (Never cut PVC!)	Low friction, self-lubricating gear teeth	Robotics drivetrains, custom clockwork, automation mechanisms
6mm Baltic Birch Plywood / Hardwood	6.0 mm	CO2 / Diode Laser or CNC Router	Kerf: 0.14mm	Wooden kinetic sculptures, mechanical automata, educational gear kits
Mild Steel / 6061 Aluminum Plate	4.0 – 12.0 mm	Abrasive Waterjet or Fiber Laser	Bore reamed to H7 shaft tolerance	Heavy workshop machinery, winches, agricultural sprockets

Packaging & CNC Engineering FAQ

Frequently Asked Questions — Involute Spur Gear CAD

How do I make sure two gears generated here will mesh together?

Two gears will mesh perfectly as long as their Module (m = Pitch Diameter L ÷ Tooth Count H) is identical. For example, Gear A with L=96mm and H=24 teeth has Module m = 4.0. Gear B with L=48mm and H=12 teeth also has Module m = 4.0. Mount their centers at (96 + 48) / 2 = 72.0mm apart.

What is the best plastic to laser-cut mechanical gears from?

Delrin (Acetal / POM) is the gold standard for laser-cut gears because it has a low coefficient of friction, high wear resistance, and cuts cleanly on a CO2 laser without melting. Cast acrylic looks great for display gears but is brittle under high torque.

Why is the Pitch Circle drawn on the Blue CREASE layer?

The Pitch Circle represents the theoretical contact diameter where two mating gears roll against each other. Placing it on the Blue CREASE/Reference layer lets you check shaft alignment in CAD while ignoring it during through-cutting.