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The Material Data Sheet

Material Properties Standard Unit EPB23
Density ISO1183 g/cm3 1.42
color

Blue
Max. moisture absorption at +23℃ /RH50%
ASTMD570 % 0.6
MAX. water absorption

% 1.9
Dynamic friction /steel(dry)


0.10-0.20
MAX.PV(dry)
N/mm2×m/s 0.4
Flexural modulus
ISO178 MPa 2000
Flexural strength at  +23℃ ISO178 MPa 110
Compressive strength

MPa 78
MAX.static pressure of the surface,+20
MPa 60
Shore hardness
ISO868 D 76
Continuous work temperature

-100/+180
Short-time work temperature

-100/+210
Thermal conductivity
ASTME1461 W/m*k 0.24
Linear coef. of thermal expansion at +23℃ ASTMD696 K-1×10-5 8
Flammability UL94
VO
Volume resistivity IEC60093 Ωcm 1×1011
Surface resistivity IEC60093 Ω 1×1011


Standard bearings
  • EPB23 Plastic Plain Bearings,Metric size
  • Product code:
  • Inner diameter d1[mm]:
  • Outer diameter d2[mm]:
  • Height L[mm]:
  • Flanges outer diameter d3[mm]:
  • Flanges thickness t[mm]:
  • d1-Min.tolerance[mm]:
  • d1-Max.tolerance[mm]:
  • d2-Min.tolerance[mm]:
  • d2-Max.tolerance[mm]:
  • L-Min.tolerance[mm]:
  • L-Max.tolerance[mm]:
  • Shaft-Min.tolerance[mm]:
  • Shaft-Max.tolerance[mm]:
  • Housing-Min.tolerance[mm]:
  • Housing-Max.tolerance[mm]:

轴承PV值

CSB-EPB23系列轴承最大运行PV值为0.4N/mm2*m/s;由此决定轴承所承受的载荷与速度成反比,详细查阅图表EPB23-1。

轴承的载荷、速度、温度

CSB-EPB23系列轴承可承受最大静载荷为60Mpa,在此载荷下轴承的最大压缩变形量参考图表EPB23-2,轴承实际工作载荷略小于60Mpa,载荷还受到运行速度以及温度的影响,速度越快 (Vmax:1.0m/s) 会导致摩擦温度上升,而温度上升 (Tmax:180℃) 会导致轴承的承载能力逐渐减弱,载荷随轴承工作温度变化情况参考图表EPB23-3。


轴承的摩擦系数、磨损、轴材料

摩擦系数
图表EPB23-4表明CSB-EPB23轴承的摩擦系数随着运动速度的变化影响较小,而图表EPB23-5表明CSB-EPB23轴承的摩擦系数随着载荷的增加明显减小,在载荷超过20Mpa是逐渐趋于平稳;图表EPB23-6表明CSB-EPB23轴承的摩擦系数受轴粗糙度的影响也相对比较小;虽然如此,我们还是建议轴的表面不能太光滑,也不能过于出差,推荐使用轴的粗糙度为Ra0.6~0.9um;

CSB-EPB23
干运行
油脂


摩擦系数μ
0.09~0.20
0.09
0.04
0.04


磨损与轴材料

图表EPB23-7表明CSB-EPB23轴承在2Mpa下做旋转运动时,磨损随着轴材料的变化较大;通过实验表明CSBEPB23轴承在做旋转运动时比较适合用于硬铬轴,不锈钢轴和硬铬轴上用于CSB-EPB23能获得良好的运行效果。图表EPB23-8表明硬铬轴更适合用于高载荷下的CSB-EPB23轴承,随着载荷的不断增加,轴承的磨损速率却变化较小,图表EPB23-8表明CSB-EPB23轴承在不同载荷下的差异。

化学抗性

CSB-EPB23塑料轴承能抵抗弱碱以及各类润滑油的腐蚀。

吸水性

在标准大气压中,CSB-EPB23塑料轴承的吸水率为0.6%,浸泡水中最大平衡吸水率为1.9%;由于此吸水率的特性,我们必须考虑此轴承的应用环境。

抗UV性能

CSB-EPB23长久暴露在紫外线下颜色会发生褪变。材料性能基本都不会发生改变。

轴承安装

CSB-EPB23系列轴承配合公差

直径 mm
压装后公差 E10
安装孔径 H7
配合轴径 h9
>0~3
+0.014~+0.054
0~+0.010
0~-0.025
>3~6
+0.020~+0.068
0~+0.012
0~-0.030
>6~10
+0.025~+0.083
0~+0.015
0~-0.036
>10~18
+0.032~+0.102
0~+0.018
0~-0.043
>18~30
+0.040~+0.124
0~+0.021
0~-0.052
>30~50
+0.050~+0.150
0~+0.025
0~-0.062
>50~80
+0.060~+0.180
0~+0.030
0~-0.074
>80~120
+0.072~+0.212
0~+0.035
0~-0.087
>120~180
+0.085~+0.245
0~+0.040
0~-0.100

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