Lead: The linear distance (mm/rev) the nut travels per one screw rotation (360°). It is the primary parameter that determines travel speed and resolution. Small lead: High resolution, high thrust (at the same torque), and low travel speed. Large lead: High travel speed, low resolution, and low thrust (at the same torque). Nominal diameter: The […]
Key Performance Parameters and Selection Factors for Ball Screws Read More »
High efficiency: Transmission efficiency is usually as high as 90% or more (sliding screw is usually less than 50%). This means: Smaller driving force (such as motor torque) can achieve the same output force. Lower energy loss and heat generation. “Reverse drive” can be achieved (that is, the force at the linear end can drive
I. Basic composition: Screw: A shaft with a precision spiral raceway. The raceway section is usually a Gothic arch, which is used to guide and carry the ball. Nut: A spiral raceway that matches the screw is also machined inside. The nut usually contains a circulation structure. Ball: A high-precision steel ball that rolls between
Core structure and working principle of ball screw Read More »
Cutting-edge technology trends 1.Nano-modified materials: Graphene-enhanced PTFE → Wear resistance increased by 3 times, PV value exceeds 1.0 MPa·m/s 2.Smart bushing: Embedded micro-sensor → Real-time monitoring of temperature/wear volume (Industry 4.0 equipment) 3.Biocompatible materials: Medical-grade PEEK+CF → Artificial joint applications (compliant with ISO 10993 standards)
Oil-free bushing failure modes and prevention measures Read More »
1. Load and Speed Calculation Radial Load Formula: P: Surface pressure (MPa) F: Radial force (N) d: Shaft diameter (mm) L: Bushing length (mm) Safety margin: Actual PV ≤ 0.7 × Material limit PV 2.Fit tolerance design Interference amount recommendation (press-fit installation): Metal-based bushing: Interference amount = (0.001~0.002) × aperture Plastic bushing: Interference amount ≤
Oil-free Bushing Selection and Design Engineering Guide Read More »
Analysis of key parameters: PV limit value = surface pressure (P) × sliding speed (V) Over limit → accelerated temperature rise → material softening/failure Dry friction coefficient: PTFE (0.04~0.1) < POM (0.1~0.3) < metal base (0.15~0.35)
In-depth comparison of oil-free bushing material performance Read More »
·Self-lubricating mechanism: I. Embedded solid lubricant (metal-based): Material: bronze/iron-based powder metallurgy + graphite/molybdenum disulfide (MoS₂)/PTFE Principle: Frictional heat is generated when the shaft rotates → lubricant seeps out from the pores of the matrix → a transfer film is formed on the friction surface Lubricant ratio: usually 5%~30% (affects life and load-bearing capacity) II. Engineering
Precise installation: Ensure that the shaft end is clean and free of burrs. The hub is usually firmly mounted on the shaft by interference fit (shrink fitting, hydraulic method) or key connection (with set screws). Tighten the bolts according to the installation steps and torque requirements provided by the manufacturer. Precise shaft alignment: This is
Coupling installation, alignment and maintenance Read More »
Couplings are used in almost all industrial fields involving rotational power transmission: General machinery: pumps, fans, compressors, mixers, conveyors. Process industries: petrochemicals, pharmaceuticals, food and beverages, water treatment. Energy and power: generator sets (steam turbines, gas turbines, water turbines, generators), wind turbines. Transportation: automobiles, ships, locomotives (connections between engines, gearboxes, and drive axles). Metallurgy and
Choosing the right coupling is crucial to the reliability, efficiency and life of the transmission system. The main considerations include: 1.Transmitted torque: The working torque, starting torque and maximum torque (considering the safety factor) need to be calculated. The rated torque of the coupling must meet the requirements. 2.Speed: The coupling has a maximum operating
