Is the pulley a standard?
Pulley should not standard parts, despite the size of the relevant standards, like gear, is not standard, at least, not provided basic standard size, hole, etc.
You need a lot of parameters. Baidu web page design manual (new edition).pdf free download, article 14, full of it.
After the compression, the inner and outer increases the shaft and pulley. You can transfer the power of 30KW, 83N. The pulley is not a standard, although its dimensions are standard, like gears, although there are standard parameters
The diameter ratio of the pulley is equal to the deceleration ratio, depending on the speed set you need to output the shaft
