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 certainly too small to notice and the pulley appears to be spinning without cause, creating a impressive impact. Pulley rotations were observed for a variety of pulleys and cords; almost any such program will work. The quickness and path of the rotation depends on the many physical parameters of the system: 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 items into a whole, the machining and material cost is high.
Spinning pulley:
Spinning pulley followed stamping and spinning technology, through the production process, it really is formed by extruding the complete part materials. These pulleys have high production efficiency. Not only can it save recycleables and cost, but also can be used longer because of its better wear-resisting and rust-proof. Right now this pulley is certainly well loved in the high-end marketplace in the auto sector, 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 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 yard mower
Material: popular 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 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 pubs than traditional clamps. It includes 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 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 provide a quick and robust hanging point for TV and theatre sceneries. The grab clamp has been designed to be installed on a wide selection of beams, pipes and bars, whether round, sq ., or rectangular in section. It needs no adapter – just open and clamp it.