The 671 is an extra-small miniature deep groove ball bearing from the metric 6700 series, designed for applications where space is at an absolute premium and precise rotational motion is required. With its minute 1mm bore and ultra-compact 1x2x1 mm dimensions, this micro-bearing is engineered for low-torque, high-speed performance. Despite its size, it retains the classic deep groove design to handle light radial and bidirectional axial loads, making it the ideal choice for miniature motors, dental handpieces, small gears, and precision instrumentation where smooth operation and reliability are critical.