小滚珠的临界速度，也许是每秒几百米。
Well, this critical speed for a small ball bearing would be some hundred meters per second.
滚珠丝杠由于运动效率高、发热小，故可实现高速进给(运动)。
Ball screw due to high movement efficiency, small heat, it can achieve high-speed feed (motion).
机体轴承。镀镉钢的刚性单列滚珠轴承。0号和2号直径系列。小游隙类。尺寸和负荷。
Bearings, airframe rolling - rigid single row ball bearings in steel, cadmium plated - diameter series 0 and 2. reduced clearance category - dimensions and loads.
轴采用滚珠螺杆传动精度佳，摩擦系数小。
X axis and Y axis adopt ball spiral rods with excellent precisions and low friction factors.
用多叶箔片轴承取代火箭发动机涡轮泵上的滚珠轴承具有工作寿命长、工作转速高、能量损失小等重要优点。
Multileaf foil bearing, instead of ball bearing of turbo-pump in rocket engine, has many important advantages including long life, high speed and low energy loss.
整机铸铁铸造，进口滚珠丝杆，加工时平稳性好，控制精度高，机床震动小。
When processing, the stability of the engraver is good, the controlling precision is high, and the shake is small.
推纸挡规导轨采用硬度高，耐磨性好的线性导轨，再配以间隙小，硬度高的滚珠丝杆，最大保证了推纸的平稳性和高精度性。
C. Guide rail of impeller stopper adopts high hardness, good abrasion linear rails, and with small gap, high hardness ball screw lead, ensures stability and high precision for paper pushing. D.
推纸挡规导轨采用硬度高，耐磨性好的线性导轨，再配以间隙小，硬度高的滚珠丝杆，最大保证了推纸的平稳性和高精度性。
D. Guide rail of impeller stopper adopts high hardness, good abrasion linear rails, and with small gap, high hardness ball screw lead, ensures stability and high precision for paper pushing. E.
推纸挡规导轨采用硬度高，耐磨性好的线性导轨，再配以间隙小，硬度高的滚珠丝杆，最大保证了推纸的平稳性和高精度性。
D. Guide rail of impeller stopper adopts high hardness, good abrasion linear rails, and with small gap, high hardness ball screw lead, ensures stability and high precision for paper pushing. E.
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