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 can be too small to notice and the pulley seems to be spinning with no cause, creating a impressive effect. Pulley rotations were noticed for a variety of pulleys and cords; almost any such program will work. The acceleration and path of the rotation depends on the various physical parameters of the machine: vibration frequency and amplitude, cord pressure, and the radius and minute 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 used stamping and spinning technology, through the production process, it is formed by extruding the complete part materials. These pulleys have high production efficiency. Not merely can it save recycleables and cost, but also can be used longer because of its better wear-resisting and rust-proof. Now this pulley is certainly well liked in the high-end market in the auto market, 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 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 yard mower
Material: warm 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 because of its pincer jaw design could be affixed to a wider variance of round or sq . pipes, beams and bars than traditional clamps. It has a push-switch lock for extra safety and 3.9″ pulley for raising drapes or other articles in TV, video and photographic studios and theaters. The Grab Clamp will endure 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 made to be mounted on a wide selection of beams, pipes and pubs, whether round, sq ., or rectangular in section. It requires no adapter – just open up and clamp it.