BS2-2218-2RS5/GEM9 Bore 90 Mm, Stamping Steel Cage, Sealed Spherical Roller Bearings, Special Dimensions
The BS2-2218-2RS5/GEM9 Double-row spherical roller bearings are suitable for heavy-load, impact, and eccentric conditions. Classic applications include vibrating screen exciters, crushers, fans, paper machine press rolls, mining conveyor equipment, and marine propulsion shafts.
The BS2-2218-2RS5/GEM9 bearing is a Sealed spherical roller bearings with an inner diameter of 90 mm , an outer diameter of 160 mm, a width of 48 mm. GCr15SiMn rings, GCr15SiMn rolling mlement. It uses Normal standard radial clearance, 2RS5 = Contact seal, HNBR, on both sides type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
BS2-2218-2RS5/GEM9 bearings ( 90 mm x 160 mm x 48 mm) have the advantages of Self-aligning, high load-bearing capacity, and impact resistant, and are therefore widely used in the Mining machinery, metallurgical equipment, papermaking machinery, vibrating screens, wind turbines, and large industrial gearboxes.
| Part Number | BS2-2218-2RS5/GEM9 |
| Bearing Type | Sealed spherical roller bearings |
| Reference From | SKF BS2-2218-2RS5/GEM9 |
| Cage | Stamping steel cage |
| Seal | 2RS5 = Contact seal, HNBR, on both sides |
| Internal clearance | Normal |
| Weight [lb] | 8.157 |
| Heat stabilization | 392 °F (200 °C) |
| Roller bearing type | Spherical |
| Lubrication | GEM9 = Filled to 70 – 100% with SKF LGHB 2 grease |
| Bore Type | Z = cylindrical bore |
| Other variants | BS2 = Two row spherical roller bearing, special dimensions |
| Principal Dimensions | |
| Inside - d φ [inch] | 3.543 |
| Inside - d φ tolerance | -0.02 mm to 0 |
| Outside - D Φ [inch] | 6.299 |
| Outside - D Φ tolerance | -0.025 mm to 0 |
| Width - B [inch] | 1.890 |
| Width - B tolerance | -0.08 mm to 0 |
| d2 [inch] | 4.016 |
| D1 [inch] | 5.748 |
| b [inch] | 0.236 |
| K [inch] | 0.118 |
| r1,r2(min.) [inch] | 0.079 |
| Performance | |
| Dynamic Radial - Cr [lbf] | 74256 |
| Static Radial - C0r [lbf] | 84111 |
| Speed ratings (oil) - nG [rpm] | 1857 |
The BS2-2218-2RS5/GEM9 Double-row spherical roller bearings mainly consist of an inner ring, an outer ring, two rows of spherical rollers, a cage, and seals. The outer ring raceway has a spherical structure, while the inner ring has a double-row raceway. The rollers and raceways are logarithmically curved. The cage is typically made of stamped steel or machined brass.
Double-row spherical roller bearings possess excellent self-aligning properties, compensating for shaft deflection, installation errors, and misalignment. They can simultaneously withstand radial loads and bidirectional axial loads, exhibiting extremely high load-bearing capacity and strong impact resistance. Furthermore, the internal clearance can be optimized for vibration conditions, effectively reducing frictional temperature rise.
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