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-004 140 × 124.5 × 10 mm (T=1.5mm) Pre-Verified 1:1 Static Files Ready

Standard 140mm PC Case Fan & 5.25-Inch Speaker Mesh Grille Plate (124.5mm Bolt Pitch)

Interactive Parametric 2D & 3D Studio

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

Pre-loaded with 140mm Fan / 5.25" Speaker Grille (140×124.5×10 mm, T=1.5mm)

1:1 CAD ENGINE READY

Standard 140mm PC Case Fan & 5.25-Inch Speaker Mesh Grille Plate (124.5mm 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)140 mm

Mounting Bolt Pitch (W mm)124.5 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: 44 closed LWPOLYLINE cut loop(s) verified
PASS
Zero Duplicate Cut Paths: 614 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 140×124.5mm === 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 (1.80m) CREASE/SCORE (0.34m)● 44 Loops · Est. Cut: ~62s

1:1 Synced · Blank: 140 × 124.5 mm

2D 1:1 Unfolded Vector BlueprintBlank: 140 × 124.5 mm (5.51" × 4.90")

3D Interactive Fold & Orbit (Kraft Board)

80%

0%100%

Camera:

Yaw: -28°Pitch: 24°

⟳ Drag Anywhere to Rotate 3DL=140 × W=124.5 × H=10mm

Faceplate Size

140.0 × 124.5 mm

Vent Aperture (Ø)

Ø 104.5 mm

Perforation Holes

39 × Ø10mm

Corner Mounts

4 × Ø4.4mm (M4)

Direct Pre-Generated 1:1 CAD Files

Download Static Ready-to-Cut Files (140×124.5×10 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 140mm Fan / 5.25" Speaker Grille

Parent Parametric Engine: Circular Fan Grille & Speaker Mesh →

Target Physical Product Size

Standard 140 × 140 mm Cooling Fan & 5.25" Speaker Frame with Ø124 mm Active Aperture

Engineered Internal Cavity & Clearance

Exact 124.5 × 124.5 mm Square Mounting Bolt Pitch (4 × Ø4.5mm Holes) + 3.0mm Structural Webs

Recommended Board / Sheet Stock

1.5mm Aluminum, 3.0mm Acrylic, or 3.0mm Acoustic Birch Plywood

Grain / Flute Orientation Rule

Isotropic laser/CNC sheet stock

Production Engineering Note: Direct bolt-on fit for 140mm PC radiator fans and 5.25-inch studio monitor / cabinet speaker cutouts.

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