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Angular Contact Ball Bearing-MONTON/H Series/HC Ceramic ball Series

Product Detail
Single row angular contact ball bearings can not only withstand radial load and axial load in one direction, but also accommodate only axial load in single direction, radial loads produce axial forces in these bearings that need to be balanced by counter forces.Therefore, the single row angular contact ball bearings often need to be installed with other bearings which withstand axial load in the opposite direction. In other words, the angular contact ball bearings are commonly used in pair, or in groups with three, four and even five bearings. Angular contact ball bearings have higher limiting speed.
The MONTON precision angular contact ball bearings have four size series, 718,719,70 and 72. With the same inner diameter, but the outer diameter and the width of 718,719,70 and 72 series increase in turn.
Fig.1 Angular contact ball bearing dimension series
MONTON precision angular contact ball bearings with 15° (C) and 25° (AC) contact angles. As for the angular contact ball bearings, the bigger the contact angle is, the greater the axial load capacity is, but the lower the limiting speed of bearings becomes. Therefore, the spindle, with high speed and small axial load, should adopt the 15° angular contact ball bearings, whereas the 25° angular contact ball bearings should be adopted.
MONTON precision angular contact ball bearings with high-speed angular contact bearings (standard series), super high-speed angular contact ball bearings, high-speed sealed angular contact ball bearings and high-speed spindle bearings.
The inner ring, outer ring and rolling element of rolling bearing under normal operating conditions are made of high carbon chromium bearing steel, but the steel bearings cannot meet the requirements of such special conditions as high speed, wear-resisting, low temperature rising, long life and high reliability etc., then Si3N4 ceramics are believed to be present optimum rolling bearing materials to replace bearing steel.
Table 1. Main performance comparison between Si3N4 and bearing steel
Performance | Code and unit | Si3N4 | Bearing steel | |
Density | γ[g/mm3] | 3.2 | 7.8 | |
Coefficient of thermal expansion | α[1/℃] | 20~1000℃ | 3.2×10-6 | - |
20~300℃ | - | 11.8×10-6 | ||
Modulus of elasticity | E[N/mm2] | 3.15×105 | 2.08×105 | |
Poisson's ratio | μ | 0.26 | 0.3 | |
Rigidity | HV10 | 1700 | 700 | |
Stress intensity | σB[N/mm2] | 20℃ | 700 | 2400 |
1000℃ | 700 | 0 | ||
Fracture toughness | Kie[MN/m1.5] | 7 | 25 | |
Coefficient of heat conductivity | λ[W/m℃] | 30~40 | 40~50 | |
Electrical resistivity | [Ωmm2/m] | 1017~1018 | 0.1~1 |
Table 2. The type and performance of MONTON angular contact ball bearing
MONTON angular contact ball bearing series | Structures | Dimension series | Bore size range | Performance |
High precision angular contact ball bearing | 718 C 718 AC 719 C 719 AC 70 C 70 AC 72 C 72 AC | 718:10~360mm 719:8~460mm 70: 8~380mm 72: 8~220mm | High speed Large loading capacity Suit for grease or oil-mist lubrication
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High speed angular contact ball bearing (hybrid ball bearing) | H719 C H719 AC H70 C H70 AC H719 C/HQ1 H719 AC/HQ H70 C/HQ1 H70 AC/HQ1 | H719:8~220mm H70:8~220mm H719/HQ1:8~220mm H70/HQ1:8~220mm | Super speed High rigidity Suit for air-oil or oil injection lubrication | |
Super speed angular contact ball bearing( incl. hybrid ball bearing) | HS719 C HS719 AC HS70 C HS70 AC HS719 C/HQ1 HS719 AC/HQ HS70 C/HQ1 HS70 AC/HQ1 | HS719:8~220mm HS70:8~220mm HS719/HQ1:8~220mm HS70/HQ1:8~220mm |