H70 Precision Copper ball is a kind of ball brass ball. Material could be made by copper, brass and bronze. Size from 1.0mm-50.8mm. Grade from G100--G500. Hardness is HRC25-30. Roundness is 5μ M, roughness is 0.15μ M.
1. Material: Copper, brass, bronze
2. Size: 1.0mm-50.8mm
3. Grade: G100--G500
4. Hardness: HRC75-87
5. Characteristics: With a low coefficient of friction, axial and radial movement.
6. Magnetic : Nearly non-magnetic
7. Applications: Mainly used for valve, spray, instrument, pressure gauge. The meter, carburetor, electrical accessories, etc.
Manufacture process of Brass Balls
Step 1 Heading
Balls blanks are cold headed from rolls of wire.
Step 2 Flashing
Rolling balls between two hard alloy plates to removes the slight band
Step 3 Heat treat
Heating balls to a high temperature in furnace and quenching balls in a liquid bath.
Step 4 Rough grind
Rolling balls between the face of a fixed iron plate and a very hard fire-grit grinding wheel. Then rolled the hardened ground balls between two cast iron plates.
Step 5 Cleaning
The final production operation cleans the finished balls and adds a shiny luster.
Step 6 Final
Balls are gauged, visually inspected and subjected to other quality tests to insure
Step 7 Packaging
The balls are packaged in accordance with customer specifications for shipping.