MF74 has a flanged outer ring ("F") for axial positioning. MR74 has no flange and is used for standard radial mounting. Same body dimensions but different mounting — not interchangeable.
MF74 Miniature Flanged Bearing
MF74 is an ultra-compact miniature flanged deep groove ball bearing. Common size 4x7x2.5mm, flange OD ~8.2mm, flange width ~0.6mm. Designed for extremely space-constrained micro guidance and precision transmission structures.
Specifications
| Model | MF74 |
|---|---|
| Size | 4x7x2.5mm (bore x OD x width) |
| Flange OD | ~8.2mm |
| Flange Width | ~0.6mm |
| Series | Miniature flanged deep groove ball bearing |
| Material | GCr15 bearing steel / stainless steel |
| Sealing | ZZ / 2RS / Open, selected by requirement |
| Precision | Available by order requirements |
| Applications | RC models, micro motors, precision instruments, 3D printers, medical micro pumps, textile machinery, office equipment |
Selection Notes
- MF74 is extremely small (bore only 4mm) — check both body and flange dimensions during selection.
- Flange OD ~8.2mm is a common published specification; minor variations may exist across manufacturers.
- If precision, noise or speed requirements matter, please state them during inquiry for product matching.
- The MF74 flanged design provides axial positioning — do not substitute with standard MR74 (no flange).
- Sealed/shielded suffix width may differ from open type — always specify the suffix.
Before Ordering
MF74 is available in GCr15 or stainless steel directions with ZZ/2RS/open sealing options. Due to the extremely small dimensions (4x7x2.5mm), please provide mounting space drawings, mating shaft diameter, and housing bore to avoid assembly mismatches.
FAQ
Published data shows flange OD ~8.2mm, flange width ~0.6mm as common specifications. Due to the tiny scale, minor manufacturer variations exist — verify with samples or drawings.
The suitable speed range depends on load, lubrication, mounting accuracy and sealing type. Please provide real working conditions when inquiring.