Manufacturing and development of bearings for special environment  | balls, bearing and related parts | BNB I&T Co., LTD.
 
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- Tungsten
- Needle roller pin
 
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Steel Ball
 
 
Carbon Steel Ball
Carbon Steel Ball
Chemical Composition
Sign Chemical Composition
C Si Mn P S Ni Hardness(HRC)
S15C 0.13~0.18 0.15~0.35 0.30~0.60 0.03 0.35 0.2 Below 58
S45C 0.42~0.48 0.15~0.35 0.60~0.90 0.03 0.35 0.2  
 
Product Grade Unit:㎛
Grade Scope of name Shape precision and
roughness
Section precision and gauge
Metric Inch Diameter
(VDWS)
Sphericity
(Max.)
Surface
roughness
Ra
LOT difference
(VDWL
Gauge interval
40 0.3-5.0 0.025-2 1 1 0.08 2 4
200 0.3-65 0.025-4½ 5 5 0.2 10 15
1000     25.4 25.4   50.8  
 
Carbon steel is composed of hard surface and soft, durable inner core therefore is strong against physical impact.
It is relatively affordable in case where high priced chromium balls with fully hardened inner core are not needed.

Production scope : 1mm ~ 25.4mm
Applications : Caster (wheel), slide rail, bearing, toy, ball mill