HC6218-C3 Hybrid Deep Groove Ball Bearing, Ceramic Balls
The HC6218-C3 Hybrid deep groove ball bearings are widely used in high-speed, high-precision applications with the risk of shaft current, such as: variable frequency motors (pumps, fans), high-speed electric spindles, turbochargers, medical equipment (high-speed dental drills), electric vehicle drive motors, and semiconductor equipment.
The HC6218-C3 bearing is a Hybrid Deep groove ball bearing, ceramic balls with an inner diameter of 90 mm , an outer diameter of 160 mm, a width of 30 mm. It typically uses PN grade precision tolerances and GCr15SiMn rings, Ceramic balls rolling mlement. Its dynamic radial rated load is approximately 101910 N, its static radial rated load is approximately 70914 N. It uses C3 standard radial clearance, Open type, together determine its load-bearing capacity, rotational accuracy, and applicable working conditions.
Interchange code: HC6218.C3
HC6218-C3 bearings ( 90 mm x 160 mm x 30 mm) have the advantages of High speed, low heat generation, insulation and anti-electrolytic corrosion, and also possess the bidirectional load-bearing capacity of deep groove ball bearings, and are therefore widely used in the High-speed motors, electric spindles, frequency converters, precision instruments, and electric vehicle drive systems.
| Part Number | HC6218-C3 |
| Reference From | FAG HC6218-C3 |
| Bearing Type | Hybrid Deep groove ball bearing, ceramic balls |
| Series | HC62 |
| Ball material | Ceramic balls |
| Sealing | Open |
| Cage | JN = Stamping steel cage |
| Radial internal clearances | C3 |
| Heat stabilization | S0 = (up to 150 °C) |
| Lubricant | Without |
| Design | HC = Hybrid bearing, ball ceramic, rings made of steel |
| Equivalent | HC6218.C3 |
| Weight [lb] | 4.277 |
| Cr Radial Dynamic [lbf] | 22909 |
| C0r Radial static [lbf] | 15941 |
| Cur Radial Fatigue [lbf] | 738 |
| nB Reference speed [rpm] | 5673 |
| nG Limiting speed [rpm] | 7568 |
| Operating temperature - T(min) [°C] | -30 |
| Operating temperature - T(max) [°C] | 150 |
| d φ Inside [inch] | 3.543 |
| D Φ Outside [inch] | 6.299 |
| B Width [inch] | 1.181 |
| r(min.) [inch] | 0.079 |
| D1 [inch] | 5.466 |
| d1 [inch] | 4.433 |
| Mounting dimensions | |
| da(min.) [inch] | 3.976 |
| Da(max.) [inch] | 5.866 |
| ra(max.) [inch] | 0.079 |
| Coefficient - F0 [inch] | 14.1 |
The HC6218-C3 Hybrid deep groove ball bearings are primarily composed of high-precision bearing steel inner and outer rings, silicon nitride ceramic balls, and a cage (stamped steel, solid brass, or PA66). They are available in various forms, including open, with dust caps, and contact seals, and the cages are compatible with standard steel ball bearings.
The ceramic balls in hybrid deep groove ball bearings have a density only 60% that of steel balls, significantly reducing centrifugal force and increasing the limiting speed by 15%-30%. The electrical insulation properties of ceramic materials effectively prevent electrolytic corrosion, making them suitable for applications with shaft current, such as variable frequency motors. They feature low friction, low temperature rise, smooth operation, and high wear resistance, maintaining a long service life even under poor lubrication conditions.
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