A pulley can 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 definitely too small to note and the pulley seems to be spinning with no cause, creating a impressive impact. Pulley rotations were observed for a number of pulleys and cords; almost any such program will work. The swiftness and direction of the rotation depends on the many physical parameters of the system: vibration frequency and amplitude, cord pressure, 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 materials cost is high.

Spinning pulley:
Spinning pulley followed stamping and spinning technology, during the production process, it really is formed simply by extruding the complete part materials. These pulleys possess high production efficiency. Not merely can it save raw materials and price, but also can be utilized longer because of its better wear-resisting and rust-proof. Now this pulley is well liked in the high-end marketplace in the auto market, kitchen appliances industry, machinery market ETC. We are haapy that you ask for our mature and professional spinning technology.

V-belt Spinning Pulley, Metal Pulley, Split Pulley for Yard Mower
Product Details
Model Number:P100-42 10016
Brand Name:Renchi
Origin:China (mainland)
Key Specifications/Unique 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 area 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 variety of round or sq . pipes, beams and bars than traditional clamps. It includes a push-switch lock for extra security 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 Capability: 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 get clamp has been designed to be mounted on an array of beams, pipes and bars, whether round, sq ., or rectangular in section. It needs no adapter – just open up and clamp it.