Reciprocating screws and trapezoidal screws are two common mechanical transmission components,and they have significant differences in structure,working principles,and application scenarios.Below are their main distinctions:

Thread Shape

Reciprocating screws are typically use rectangular threads or specially designed thread shapes.The sides of the threads are vertical,resembling a square profile.

Trapezoidal screws with the sides of the threads forming a trapezoid,usually at an angle of 30 degrees(metric)or 29 degrees (imperial).The trapezoidal lead screw structure is better suited for handling larger axial loads.

Working Principle

Self-reversing screw used to convert rotary motion into linear reciprocating motion.Typically used with a block nut that moves back and forth along the screw.Suitable for applications requiring frequent reciprocating motion.

Lead screw is mainly used to convert rotary motion into linear motion,often for unidirectional power transmission.The trapezoidal thread design allows it to withstand larger loads,but with relatively lower efficiency.

Load Capacity

Self-reversing screw is suitable for light or medium-load applications.Due to the rectangular thread design,friction is lower,making it suitable for high-speed motion.

The trapezoidal thread lead screw is suitable for heavy-load applications.Allows for better load distribution,but with higher friction.

Efficiency

Due to the rectangular thread design,self-reversing screw's friction loss is lower,resulting in higher transmission efficiency.

Lead screw with lower transmission efficiency due to higher friction in trapezoidal threads.

Precision

Level winder screws are suitable for applications requiring precise control.Commonly used in precision instruments or automated equipment.

Trapezoidal lead screw with lower precision,but can be improved through machining.Often used in industrial machinery or heavy-duty equipment.

Self-Locking Property

Reciprocating screws often requiring additional braking devices to prevent reverse motion.

Lead screws have better self-locking property, able to maintain position when stopped, suitable for applications requiring self-locking.

Contact us to get a quote about reciprocating screws and trapezoidal screws!