# Axial fans, 25 to 140 mm: frames and hole patterns > What is the screw hole spacing for 80 mm, 92 mm and 140 mm fans? - Category: Power & cooling › Fans - Kind: Hardware - Basis: Industry-standard square axial fan frames (hole pattern = frame − 8 mm for 40 mm and larger except 140, which uses 124.5) - Page: https://xemstudio.com/objects/axial-fan-frames/ · JSON: https://xemstudio.com/api/geometry?object=axial-fan-frames · Plain text: https://xemstudio.com/objects/axial-fan-frames/sheet.txt - License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses ## Notes - Hole patterns: 25→20, 30→24, 40→32, 50→40, 60→50, 70→61.5, 80→71.5, 92→82.5, 120→105, 140→124.5 mm. Holes Ø4.3 from 50 mm up, Ø3.5 (M3) for 40 and Ø2.9 (M2.5) for 25/30. - Thickness: 10 mm for 25–40, 15 for 50–70, 25 for 80–140 (15 mm slim 120s exist; 4020 is a 20 mm 40). Airflow arrows are moulded on the frame side. - Print a grille/duct to the frame outer size + 0.5 mm; the files are the frame envelope with a solid hub so the duct can be checked for clearance. ## Sizes | frame_mm | hole_pattern_mm | hole_dia_mm | thickness_mm | |---|---|---|---| | 25 | 20 | 2.9 | 10 | | 30 | 24 | 2.9 | 10 | | 40 | 32 | 3.5 | 10 | | 50 | 40 | 4.3 | 15 | | 60 | 50 | 4.3 | 15 | | 70 | 61.5 | 4.3 | 15 | | 80 | 71.5 | 4.3 | 25 | | 92 | 82.5 | 4.3 | 25 | | 120 | 105 | 4.3 | 25 | | 140 | 124.5 | 4.3 | 25 | ## Where the files are - Wikipedia: [Computer fan](https://en.wikipedia.org/wiki/Computer_fan) — web — CC BY-SA 4.0 (text) - McMaster-Carr: [Equipment-cooling fans (free STEP/IGES/STL per part, for your own design use; no redistribution)](https://www.mcmaster.com/products/equipment-cooling-fans/) — STEP, IGES, STL, PDF — McMaster-Carr site terms: personal design use, no redistribution (verify at link) ## Free STEP/STL (12 parts, CC BY 4.0, Xem Studio) Index: https://xemstudio.com/files/hardware/axial-fan-frames/index.json - fan-25x10: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-25x10.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-25x10.stl) — 25 mm frame, 20 mm hole pattern, Ø2.9 holes, 10 thick - fan-30x10: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-30x10.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-30x10.stl) — 30 mm frame, 24 mm hole pattern, Ø2.9 holes, 10 thick - fan-40x10: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-40x10.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-40x10.stl) — 40 mm frame, 32 mm hole pattern, Ø3.5 holes, 10 thick - fan-50x15: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-50x15.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-50x15.stl) — 50 mm frame, 40 mm hole pattern, Ø4.3 holes, 15 thick - fan-60x15: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-60x15.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-60x15.stl) — 60 mm frame, 50 mm hole pattern, Ø4.3 holes, 15 thick - fan-70x15: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-70x15.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-70x15.stl) — 70 mm frame, 61.5 mm hole pattern, Ø4.3 holes, 15 thick - fan-80x25: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-80x25.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-80x25.stl) — 80 mm frame, 71.5 mm hole pattern, Ø4.3 holes, 25 thick - fan-92x25: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-92x25.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-92x25.stl) — 92 mm frame, 82.5 mm hole pattern, Ø4.3 holes, 25 thick - fan-120x25: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-120x25.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-120x25.stl) — 120 mm frame, 105 mm hole pattern, Ø4.3 holes, 25 thick - fan-140x25: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-140x25.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-140x25.stl) — 140 mm frame, 124.5 mm hole pattern, Ø4.3 holes, 25 thick - fan-40x20: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-40x20.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-40x20.stl) — 40 × 40 × 20 (4020) - fan-120x15: [STEP](https://xemstudio.com/files/hardware/axial-fan-frames/fan-120x15.step) · [STL](https://xemstudio.com/files/hardware/axial-fan-frames/fan-120x15.stl) — 120 × 120 × 15 slim ## Questions **What is the 80 mm fan screw spacing?** 71.5 × 71.5 mm, Ø4.3 holes, 25 mm thick standard. **What is the 140 mm fan hole spacing?** 124.5 × 124.5 mm (some 140s also carry the 120 mm 105 × 105 pattern). Ø4.3 holes, 25 mm thick. **What is the 30 mm fan hole spacing?** 24 × 24 mm, Ø2.9 holes (M2.5); 25 mm fans use 20 × 20. Both 10 mm thick (3010, 2510). **What is the 60 mm fan hole spacing?** 50 × 50 mm, Ø4.3 holes; 15 or 25 mm thick. ## Fits with - [40 mm axial fan](https://xemstudio.com/objects/40mm-fan/) - [120 mm axial fan](https://xemstudio.com/objects/120mm-fan/) - [Socket head cap screws, M2–M8 (ISO 4762 / DIN 912)](https://xemstudio.com/objects/socket-head-cap-screws-metric/) - [Raspberry Pi 5](https://xemstudio.com/objects/raspberry-pi-5/)