A pulley could be caused to rotate by creating longitudinal vibrations in a cord that passes over the pulley. For little amplitudes and high frequencies, the motion of the cord is usually too small to notice and the pulley appears to be spinning without cause, creating a impressive effect. Pulley rotations were noticed for a number of pulleys and cords; almost any such system will work. The acceleration and path of the rotation depends upon the various physical parameters of the machine: vibration frequency and amplitude, cord tension, and the radius and moment of inertia of the pulley.
Welded pulley:
While welded pulley is welded and machined parts parts into a whole, the machining and materials cost is high.

Spinning pulley:
Spinning pulley used stamping and spinning technology, through the production process, it is formed simply by extruding the complete part material. These pulleys possess high production efficiency. Not only can it save raw materials and cost, but also can be used longer for its better wear-resisting and rust-proof. Now this pulley is well enjoyed in the high-end marketplace in the auto industry, home appliances industry, machinery industry ETC. We are haapy that you ask for 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/Unique Features:
V-belt spinning pulley metal pulley split pulley for lawn mower
Material: incredibly hot 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 Get clamp with spinning pulley
The Ever-powerC339JS Grab Clamp with Spinning Pulley is flexible and fast, and because of its pincer jaw design can be affixed to a wider variety of round or square pipes, beams and bars than traditional clamps. It has a push-switch lock for extra basic safety and 3.9″ pulley for raising curtains or other articles in TV, video and photographic studios and theaters. The Grab Clamp will hold up to 331 lb.
PRODUCT HIGHLIGHTS
– Zinc-Plated Steel Construction
– 3.9″ Pulley
– Load Capability: 331 lb / 150 kg
Ever-power Get Clamp with 100mm Spinning Pulley
About Ever-powerGrab Clamp
The C339SP is fitted with a 100mm diameter pulley to provide a quick and robust hanging point for TV and theatre sceneries. The grab clamp has been designed to be mounted on a wide range of beams, pipes and pubs, whether round, sq ., or rectangular in section. It requires no adapter – just open and clamp it.