Q: What is a trapezoidal screw?
A: A trapezoidal screw is a sliding screw with a trapezoidal thread. Usually, a 30-degree trapezoidal screw means that the angle of the extended line of the thread section is 30 degrees.
Trapezoidal screws are divided into left-handed and right-handed threads. The most commonly used in reality is the right-handed trapezoidal screw. It is used in conjunction with a trapezoidal nut and has good self-locking properties.
Q: What is the main difference between a trapezoidal screw and a ball screw?
A: The biggest difference is positioning and transmission. Ball screws use recirculating ball bearings to minimize friction and improve efficiency, while trapezoidal screws use the low friction coefficient between sliding surfaces.
Q: Are the screw shaft and nut of a trapezoidal screw purchased separately?
A: Yes, unlike a ball screw, the screw shaft and nut of a trapezoidal screw are purchased separately.
Q: Does the trapezoidal screw have an axial clearance indicator? What are its specifications and accuracy?
A: The trapezoidal screw has no axial clearance tolerance, only the runout tolerance in the radial direction. The specifications and accuracy of the trapezoidal screw include thread accuracy, nut accuracy, single pitch error, cumulative pitch error, full-length runout tolerance, length dimension tolerance, etc.
Q: What are the categories of trapezoidal screws? What are the nuts for trapezoidal screws?
A: Categories of trapezoidal screws:
First, there are S45C trapezoidal screws and SUS303 stainless steel trapezoidal screws according to the material, of which the surface of the S45C trapezoidal screw has a blackening treatment;
Second, there are 3MM, 4MM, 6MM, 8MM and other trapezoidal screws according to the pitch;
Third, there are straight rod type, one step type, two step type, etc. according to the end step;
Fourth, there are extrusion molding and turning processing types according to the processing technology. The turning processing type has high precision and can process left and right teeth and special tooth screws.
The material of the trapezoidal screw nut is brass. It usually has flange nuts, square nuts, straight column nuts, etc. When it is used with the trapezoidal screw, the pitch and thread accuracy must be consistent. When used with the nut bracket, the outer circle accuracy of the nut and the inner hole accuracy of the bracket must be well matched.
Q: What is the trapezoidal screw support assembly?
A: The trapezoidal screw support assembly has two types: square and round. It is used with the support assembly type trapezoidal screw. It is functionally divided into a fixed side support assembly and a supporting side support assembly.
The fixed side support assembly is assembled with a main body, a gland and a deep groove ball bearing, and cannot be disassembled. Its accessories include locking nuts, shaft rings, etc., which mainly fix the bearing seat.
The supporting side support assembly consists of a main body, a bearing and a retaining spring, and the retaining spring is used to fix the shaft. The trapezoidal screw support assembly can be used with an anti-rotation fixing as needed to fix the screw and facilitate the installation of the position display.
Q: Can the trapezoidal screw be customized? What kind of additional processing is available?
A: It can be customized. Zhenxiang can customize trapezoidal screws with different pitches, different materials, and different specifications according to customer requirements. Additional processing of trapezoidal screws refers to the processing of the end shaft, which generally includes plane processing, external thread processing, retaining ring groove processing, keyway processing, etc. The screw can be processed according to the special requirements of customers.
