A pulley could be caused to rotate by creating longitudinal vibrations in a cord that passes over the pulley. For small amplitudes and high frequencies, the movement of the cord is too small to notice and the pulley appears to be spinning without cause, creating a impressive effect. Pulley rotations were observed for a variety of pulleys and cords; nearly any such system will work. The quickness and path of the rotation depends upon the various physical parameters of the system: vibration frequency and amplitude, cord stress, and the radius and moment of inertia of the pulley.
Welded pulley:
While welded pulley is welded and machined parts pieces into a whole, the machining and material cost is high.
Spinning pulley:
Spinning pulley adopted stamping and spinning technology, through the production process, it is formed simply by extruding the complete part materials. These pulleys have high production efficiency. Not merely can it save raw materials and price, but also can be used longer for its better wear-resisting and rust-proof. Now this pulley is usually well liked in the high-end marketplace in the auto industry, home appliances industry, machinery industry ETC. We are haapy that you demand our mature and professional spinning technology.
V-belt Spinning Pulley, Steel Pulley, Split Pulley for Lawn Mower
Product Details
Model Number:P100-42 10016
Brand Name:Renchi
Origin:China (mainland)
Key Specifications/Particular Features:
V-belt spinning pulley steel pulley split pulley for yard mower
Material: popular rolled steel plate
Thickness: 4.0mm
Out diameter: 122mm
Weight: 0.390kg
V-Belt type: SPB
Surface treatment: zinc plated yellow
Primary Competitive 
Advantages:
Prompt Delivery
Quality Approvals
Service
Small Orders Accepted
Origin
Experienced Staff
Form A
Green Product
Price
Ever-power C339SP Grab clamp with spinning pulley
The Ever-powerC339JS Get Clamp with Spinning Pulley is flexible and fast, and thanks to its pincer jaw design can be affixed to a wider variance of round or sq . pipes, beams and bars than traditional clamps. It has a push-button lock for extra basic safety and 3.9″ pulley for raising drapes or other articles in TV, video and photographic studios and theaters. The Get Clamp will endure to 331 lb.
PRODUCT HIGHLIGHTS
– Zinc-Plated Steel Construction
– 3.9″ Pulley
– Load Capacity: 331 lb / 150 kg
Ever-power Grab Clamp with 100mm Spinning Pulley
About Ever-powerGrab Clamp
The C339SP is fitted with a 100mm diameter pulley to offer a quick and robust hanging point for TV and theatre sceneries. The grab clamp has been designed to be installed on a wide range of beams, pipes and bars, whether round, square, or rectangular in section. It requires no adapter – just open up and clamp it.