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 motion of the cord is usually too small to note and the pulley seems to be spinning without cause, creating a impressive effect. Pulley rotations were observed for a number of pulleys and cords; nearly any such system will work. The acceleration and path of the rotation depends 
on the various physical parameters of the machine: vibration frequency and amplitude, cord stress, and the radius and instant of inertia of the pulley.
Welded pulley:
While welded pulley is welded and machined parts items right into a whole, the machining and material cost is high.
Spinning pulley:
Spinning pulley followed 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 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 well appreciated in the high-end marketplace in the auto sector, home appliances industry, machinery sector ETC. We are haapy that you demand our mature and professional spinning technology.
V-belt Spinning Pulley, Steel Pulley, Split Pulley for Yard Mower
Product Details
Model Number:P100-42 10016
Brand Name:Renchi
Origin:China (mainland)
Key Specifications/Special Features:
V-belt spinning pulley metal pulley split pulley for lawn 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 Get clamp with spinning pulley
The Ever-powerC339JS Grab Clamp with Spinning Pulley is flexible and fast, and thanks to its pincer jaw design could be affixed to a wider variance of round or square pipes, beams and pubs than traditional clamps. It has a push-button lock for extra safety and 3.9″ pulley for raising curtains 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 get clamp has been designed to be installed on a wide range of beams, pipes and pubs, whether round, sq ., or rectangular in section. It needs no adapter – just open and clamp it.