Small copper stator

1. By the material of the stator windings, it can be divided into copper and aluminum stators.
   Common stators are made of purple copper and have an insulation paint coating on the outer layer. However, some low-end motors use enamel-coated aluminum wire. Such stators are cheaper. The value difference between copper and aluminum is more than three times; hence, the specific material type should be agreed upon before trading to avoid significant losses and claims.
2. By the specifications of the stator, it can be divided into large, medium, small, and mixed stators.
   Stators of different sizes have slightly different copper content. Generally, small stators have slightly higher copper content than large stators. Mixed stators require accurate proportions of large, medium, and small stators to help the buyer estimate the value reasonably.

Copper stators are disassembled from motors, so standalone copper stators are generally produced by scrap processing plants with disassembly capabilities.
As for the sources of motors, they are commonly found in various agricultural, industrial, and living environments, making the production of scrap motors widespread. In addition to being related to population density, industrial areas produce more scrap motors. Globally, the primary sources of scrap motors are the United States, Europe, Japan and South Korea, and Australia. Due to the high labor costs required to process scrap motors, labor costs in these developed regions far exceed the value of the motors themselves, hence these regions mainly export scrap motors.

The value of scrap motors primarily lies in their copper content, so the value points revolve around copper content.

1. Separating and removing windings
   Generally, copper windings on the stator are removed using manual cutting methods. The clean stator shaft (made of manganese steel 20Mn5Cr) is separated and sold separately.
2. Processing the winding part
   The winding part consists of enamel-coated wire, and its processing varies based on different requirements, equipment, and export directions. Some processing plants can directly package and sell enamel-coated wire. However, China does not allow the import of enamel-coated wire, so if exporting to China, the enamel coating must be removed by burning or converting the wire into copper shot (No. 2 communication wire).

The inspection of copper stators primarily focuses on whether the windings are made of copper or aluminum. Both parties should avoid trading aluminum wire stators as copper wire stators to prevent disputes.

The processing of copper stators requires significant manual labor, and the direct import of such scrap is strictly regulated in various countries. Therefore, the disassembly of copper stators mainly occurs in Southeast Asian countries such as Thailand, Malaysia, and in countries like Pakistan and India. These countries have more relaxed import and export policies and lower labor costs. Copper stators are best sent to general waste processing plants in these regions.

The most critical aspect of copper stator transactions is ensuring that the images provided in the offer are genuine. When buyers cannot inspect the goods on-site, sellers should provide as detailed, accurate, and representative real images of the goods as possible. Some suppliers tend to use the same few photos repeatedly, which poses significant risks. The value of copper stators is partly determined by the buyer's judgment of the value of different sizes and shapes of stators. If the images and the actual goods do not match, it can easily result in losses and claims. In advance communication, suppliers should be fully responsible for any mismatch between the photos and the actual goods.
Secondly, the material of the windings should be a concern—is it copper or aluminum wire? What proportion of the batch is aluminum wire motors? Generally, motors are allowed to have a mix of copper and aluminum because it is difficult to determine the material of the windings before disassembly. However, after disassembly into stators, the material of the windings is easily identifiable, and it should not be acceptable to have aluminum wire stators mixed among separately sold copper stators.