A pulley can 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 certainly too small to notice and the pulley seems to be spinning with no cause, creating a striking effect. Pulley rotations were observed for a variety of pulleys and cords; almost any such system will work. The swiftness and path of the rotation depends upon the many physical parameters of the system: vibration frequency and amplitude, cord tension, and the radius and second of inertia of the pulley.
Welded pulley:
While welded pulley is welded and machined parts parts right 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 material. These pulleys possess high production efficiency. Not only 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 certainly well enjoyed in the high-end marketplace in the auto market, home appliances industry, machinery market 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/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 Grab 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 sq . pipes, beams and pubs 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 Grab Clamp will hold up to 331 lb.
PRODUCT HIGHLIGHTS
– Zinc-Plated Steel Construction
– 3.9″ Pulley
– Load Capacity: 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 get clamp has been made to be mounted on a wide variety of beams, pipes and bars, whether round, sq ., or rectangular in section. It requires no adapter – just open up and clamp it.