GD Linear ball bearings (drawn cup recirculating ball linear bearings) are made of punched and quenched outer ring and plastic cage with a set of rolling ball.

• GD直线运动球轴承（冲压外圈循环式直线运动轴承），由一冲压且淬硬的外圈和带一组钢球的塑料导引保持架所构成一完整的装配单元，可直接压入座孔内。