The basic design self-aligning ball bearing is available with a cylindrical bore or, in certain size ranges, with a tapered bore (taper 1:12).
自调心球轴承的基本设计带有一圆柱孔，或者在某些尺寸范围内带一圆锥孔（圆锥1：12）。
Cylindrical bore bearing is usually installed with heat, reduce the use of interference fit bearing clearance, or achieving the purpose of pretension.
圆柱孔轴承通常采用热装，利用过盈配合减小轴承游隙，或者达到预紧的目的。
In this way, code NU2308 is obtained for a cylindrical roller bearing with a 40 mm bore diameter (Section 1.6).
用这种方法，获得了NU2308为代码的孔直径40毫米的圆柱滚子轴承(16节)。
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