What are the standard dimensions and bolt pitches for 80mm, 120mm, and 140mm PC fans?

For an 80mm fan: set Frame Width L = 80mm and Bolt Pitch W = 71.5mm. For a 120mm fan: set Frame Width L = 120mm and Bolt Pitch W = 105.0mm. For a 140mm fan: set Frame Width L = 140mm and Bolt Pitch W = 124.5mm.

Why are all perforation holes exported on the CUT layer instead of SCORE?

Unlike a paper calibration grid, a physical fan grille or speaker mesh must have its circular holes cut all the way through the sheet metal, acrylic, or plywood so air and sound pass freely.

What hole diameter (H) gives the best balance of airflow and finger safety?

An 8mm to 10mm hole diameter (H = 8 to 10) with a 3mm web bridge achieves over 52% open airflow area while preventing fingers and cables from contacting spinning fan blades.

Are the 4 corner mounting holes sized for standard PC fan screws?

Yes! The 4 corner mounting holes are Ø4.5mm closed circles, which accept both standard M4 machine screws and self-tapping 5mm PC case fan screws.

TEMPLATE ID: PRE-GRD-003 120 × 105 × 10 mm (T=1.5mm) Pre-Verified 1:1 Static Files Ready

Standard 120mm PC Case Fan & Watercooling Radiator Perforated Grille Plate (105mm Bolt Pitch)

Interactive Parametric 2D & 3D Studio

Live 2D Dieline, Interactive 3D Fold Preview & Custom Size Generator

Pre-loaded with 120mm PC Case Fan Grille (DXF) (120×105×10 mm, T=1.5mm)

1:1 CAD ENGINE READY

Standard 120mm PC Case Fan & Watercooling Radiator Perforated Grille Plate (105mm Bolt Pitch)

1CAD Style & Material SetupCalibration

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)

Outer Frame Width (L mm)120 mm

Mounting Bolt Pitch (W mm)105 mm

Vent Hole Diameter (Ø mm)10 mm

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: 30 closed LWPOLYLINE cut loop(s) verified
PASS
Zero Duplicate Cut Paths: 418 unique segments (0 laser double-burns)
PASS
Flute & Kerf Tolerance Guard: T=1.50mm, K=0.000mm 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 120×105mm === Blank Size
PASS
2D ↔ 3D Kinematic Model Sync: Archetype 'circle_vent_grille' synced (1 3D component(s))
PASS
True Vector Sheet Nesting Sync: 1:1 vector paths mapped to multi-up sheet grid

100%

CUT (1.28m) CREASE/SCORE (0.28m)● 30 Loops · Est. Cut: ~44s

1:1 Synced · Blank: 120 × 105 mm

2D 1:1 Unfolded Vector BlueprintBlank: 120 × 105 mm (4.72" × 4.13")

3D Interactive Fold & Orbit (Kraft Board)

80%

0%100%

Camera:

Yaw: -28°Pitch: 24°

⟳ Drag Anywhere to Rotate 3DL=120 × W=105 × H=10mm

Faceplate Size

120.0 × 105.0 mm

Vent Aperture (Ø)

Ø 85.0 mm

Perforation Holes

25 × Ø10mm

Corner Mounts

4 × Ø4.4mm (M4)

Direct Pre-Generated 1:1 CAD Files

Download Static Ready-to-Cut Files (120×105×10 mm)

These static files are pre-calculated for 1.5mm material thickness. Click any format below to download the pre-built static file, or export custom dimensions directly from the interactive Studio above.

↓ Download .DXF AutoCAD / LightBurn ($INSUNITS=4) ↓ Download .SVG Illustrator / Corel (1:1 mm) ↓ Download .PDF 1:1 Print + 50mm Scale Bar

Product Manufacturing Specification Sheet

Calibrated Physical Clearances & Material Stock for 120mm PC Case Fan Grille (DXF)

Parent Parametric Engine: Circular Fan Grille & Speaker Mesh →

Target Physical Product Size

Standard 120 × 120 mm Axial Cooling Fan Frame with Ø104 mm Active Blade Aperture

Engineered Internal Cavity & Clearance

Exact 105.0 × 105.0 mm Square Mounting Bolt Pitch (4 × Ø4.5mm Holes) + Ø10mm Hex-Staggered Vents

Recommended Board / Sheet Stock

1.5mm Brushed Aluminum, 1.5mm Stainless Steel, or 3.0mm Matte Black Cast Acrylic

Grain / Flute Orientation Rule

Isotropic laser/CNC sheet stock

Production Engineering Note: Fits all standard 120mm PC case fans, AIO liquid cooling radiators, and 3D printer electronics enclosures.

Structural Geometry & Material Reference (ISO 13857 Finger-Safe Guard & Staggered 60° High-Airflow Perforation Standard)

Designing a high-airflow PC fan grille (80mm, 120mm, 140mm, or 200mm), audio speaker mesh, or industrial electronics vent plate requires balancing open-area airflow percentage against structural web stiffness and ISO 13857 finger safety. Our parametric generator creates a corner-chamfered square mounting plate with 4 corner M4/M5 fan mounting holes at your exact bolt pitch (W), then populates the circular airflow aperture with concentric 60-degree staggered rings of closed circular perforations (diameter = H) separated by a rigid 3.0mm structural web bridge.

Concentric Ring Radial Step Pitch (Step_R)

Step_R = (D_hole + Web_Bridge) * (sqrt(3) / 2) = 0.866 * (H + 3.0 mm)

Packs circular perforations in a 60-degree staggered hexagonal distribution to maximize open airflow area while preserving uniform web strength.

Number of Holes in Ring k (N_k)

N_k = max(6, round((2 * pi * R_k) / (D_hole + 3.0 mm)))

Automatically scales the number of circular cutouts along each concentric ring circumference so inter-hole spacing stays constant.

Open Airflow Aperture Diameter (D_aperture)

D_aperture = L_frame - 16 mm

Matches the active blade sweep diameter of standard axial cooling fans while leaving a solid outer mounting rim.

Internal CAD Silo & Related Ready-to-Cut Templates