Precision Balls

Aluminium and Duralumin Balls

General Information:
Recommended for applications where light weight and resistance to certain types of corrosion are required. Aluminium and Duralumin balls have good thermal and electrical conductivity and are non-magnetic.
Basic Composition: Aluminium Balls Duralumin Balls
Aluminium 99.9% 94
Copper --- 4%
Manganese, Magnesium, Silicon --- approx. 0.5% each
Mechanical Properties:    
Hardness --- 90-145 Brinell
Density 0.097lbs/ approx 0.101lbs/
Specific Gravity 2.68/2.70 approx. 2.74/2.79 approx.
Size Range:    
Imperial 1/16" to 15/16" inclusive  
Metric 2mm to 25mm inclusive  
Tolerances: Aluminium Balls Duralumin Balls
Basic Dia.Tolerance ±.004" ( ±.0.10mm) ±.002" ( ±.0.05mm)
Sphericity .001" ( .0.025mm) .0005" ( .0.013mm)
Surface Finish Semi-polished Semi-polished
Corrosion Resistance:
Generally resistant to acetic acid, acetone, carbonic acid, illuminating gas, petroleum products, steam etc. Definitely not recommended for most alkalies, chlorides and oxides. Contact with some other metals in the presence of an electrolyte can cause galvanic corrosion.

ISO 9001:2000

Special Materials

Titanium Carbide
Silicon Carbide
Polycarbonate Resin
Acetal Resin
Carpenter 20 Cb-3
M-50 High Speed Steel Cubic Zirconia
Silicon Nitride
Optical Quality Glass