MR18307 18x30x7mm 自行车轮毂薄壁深沟球轴承

产品视图

When your equipment demands smooth, reliable rotation under load, the MR18307 deep groove ball bearing delivers exceptional performance in a compact 18x30x7mm envelope. This single-row radial bearing is engineered for applications where precision, 耐用性, and contamination resistance are critical—from high-performance bicycle hubs to industrial machinery and precision instruments.

主要特点:

• Direct Replacement for 6903 in Leading Hubs
  The MR18307 is commonly used to replace bearings marked 6903 in front hubs from DT Swiss, Giant, and Bontrager, though the inner diameter of the MR18307 is 1mm larger than a standard 6903. This makes it a direct drop-in upgrade for many high-performance bicycle wheels.

• 卓越的负载能力
  额定动载荷为 4.6 kN and a static rating of 2.6 千牛, the MR18307 delivers robust load-carrying capability in a compact 18x30x7mm package. This load capacity makes it suitable for bicycle hubs, bottom brackets, 和工业设备.

• Superior Contamination Protection
  The double seals provide superior protection against dust, 水, 和碎片, making the MR18307 ideal for bicycle hubs, bottom brackets, and other applications exposed to the elements. 这 90% grease fill ensures long-lasting lubrication even in demanding conditions.

• Multiple Precision Grades
  Available in ABEC-1, ABEC-3, and ABEC-5 precision grades, the MR18307 can be matched to your specific performance requirements. ABEC-3 bearings offer improved quality over ABEC-1, while ABEC-5 provides ultra-tight tolerances for high-precision applications.

• 高速
  The deep-groove design and precision manufacturing enable the MR18307 to achieve limiting speeds up to 2,700 脂润滑转速, making it suitable for a wide range of rotating equipment.
• 耐腐蚀选项
  The si3n4 ceramic hybrid variant provides enhanced corrosion resistance, making it suitable for wet and humid environments.

应用领域

The MR18307 deep groove ball bearing is a versatile component trusted across numerous industries:

• Bicycle Hubs – 主要应用. Used as a front hub bearing in many high-performance bicycle wheels, including DT Swiss, Giant, and Bontrager models. Compatible with mountain bikes, road bikes, gravel bikes, hybrid bikes, touring bikes, and e-bikes.

• Bottom Brackets – Used as a bottom bracket bearing for older square taper BBs.

• Pivot Bearings – Can be used as a pivot bearing, though the MAX-type version is better suited for suspension use.