MF-691
Chrome Steel Flanged Deep Groove Ball Bearings
The MF-691 designation defines the size and shape of this ball bearing. Materials, clearances and tolerances can be tailored to your application during quotation — the specifications below are the standard configuration.
Specifications — MF-691
Bearing Dimensions
| Bore Dia(d) | 12 |
|---|---|
| Bore Unit | mm |
| Width(B) | 14 |
| Width Unit | mm |
Load Ratings
| Dynamic Load Rating | 4350 |
|---|---|
| Static_Cor_kN | 2120 |
Design & Construction
| Serie | Chrome Steel Flanged Deep Groove Ball Bearings |
|---|---|
| Material | GCr15 / AISI 52100 Chrome Steel |
| Bearing type | Ball bearing |
| Weight_kg | 0.085 |
Further Specifications
| Series | MF Series |
|---|---|
| Outer Dia(D) | 32 |
| Outer Unit | mm |
| Flange_OD_C_mm | 50 |
| Flange_Thickness_E_mm | 4 |
| Bolt_Hole_Dia_J_mm | 5.5 |
| Bolt_Circle_K_mm | 40 |
| Bolt_Count | 3 |
| Seal_Type | Open |
Lubrication & Operating Temperature
- Open version: oil lubrication recommended for maximum speed.
- Sealed version (2RS): maintenance-free grease lubrication.
- Standard greases typically limit continuous operation to about 120 °C; the GCr15 / 52100 chrome steel rings and cage typically permit continuous operation up to about <strong>150 °C</strong> (stabilised grades higher).
- Food-grade (H1) or high-temperature lubrication available on request — contact us.
Typical Applications
Every batch is inspected for dimensional tolerance, noise and vibration levels before shipment.
About the MF-691
The MF-691 is a Flanged Deep Groove Chrome Steel bearing manufactured by ZGBK Bearings (Wuxi, China). It features a width of 14. Built from high-carbon chromium GCr15 / AISI 52100 chrome steel, it delivers high hardness (60–66 HRC), heavy radial and axial load capacity and long rolling-contact fatigue life for demanding industrial applications. Full specifications are listed below.
ZGBK manufactures the MF-691 as part of the Chrome Steel Flanged Deep Groove Ball Bearings, using GCr15 / AISI 52100 Chrome Steel for high hardness, load capacity and long service life in general industrial duty. Every batch is inspected for dimensional tolerance, noise and vibration levels before shipment. As a direct factory in Wuxi, China, we support small-batch orders, custom dimensions and fast samples for qualified buyers.