English

Steel Bearing Ball for Bearing Parts

Steel Bearing Ball for Bearing Parts Featured Image
  • Steel Bearing Ball for Bearing Parts
  • Steel Bearing Ball for Bearing Parts
  • Steel Bearing Ball for Bearing Parts

Short Description:

Bearing balls are special highly spherical and smooth balls, most commonly used in ball bearings, but also used as components in things like freewheel mechanisms. The balls come in many different grades. These grades are defined by bodies such as the American Bearing Manufacturers Association (ABMA), a body which sets standards for the precision of bearing balls. They are manufactured in machines designed specially for the job.
Bearing balls are manufactured to a specific grade, which defines its geometric tolerances. The grades range from 2000 to 3, where the smaller the number the higher the precision. Grades are written “GXXXX”, i.e. grade 100 would be “G100″. Lower grades also have fewer defects, such as flats, pits, soft spots, and cuts. The surface smoothness is measured in two ways: surface roughness and waviness.


Product Detail

Product Tags

product description

Size refers to the farthest possible distance between two points on the ball's surface, as measured by two parallel plates in contact with the surface. The starting size is the nominal ball diameter, which is the nominal, or theoretical, ball diameter. The ball size is then determined by measuring the ball diameter variation, which is the difference between the largest and smallest diameter measurement. For a given lot there is a lot diameter variation, which is the difference between the mean diameter of the largest ball and the smallest ball of the lot.
Sphericity, or deviation from spherical form,refers to how much the ball deviates from a true spherical form (out of roundness). This is measured by rotating a ball against a linear transducer with a gauge force of less than 4 grams (0.14 oz). The resulting polar graph is then circumscribed with the smallest circle possible and the difference between this circumscribed circle and the nominal ball diameter is the variation.

Specifications

Grade tolerances for inch sizes

Grade Size range [in] Sphericity [in] Lot diameter variation [in] Nominal ball diameter tolerance [in] Maximum surface roughness (Ra) [μin]
3 0.006–2 0.000003 0.000003 ±0.00003 0.5
5 0.006–6 0.000005 0.000005 ±0.00005 0.8
10 0.006–10 0.00001 0.00001 ±0.0001 1.0
25 0.006–10 0.000025 0.000025 ±0.0001 2.0
50 0.006–10 0.00005 0.00005 ±0.0003 3.0
100 0.006–10 0.0001 0.0001 ±0.0005 5.0
200 0.006–10 0.0002 0.0002 ±0.001 8.0
1000 0.006–10 0.001 0.001 ±0.005

Grade tolerances for metric sizes

Grade Sphericity [mm] Lot diameter variation [mm] Nominal ball diameter tolerance [mm] Maximum surface roughness (Ra) [µm]
3 0.00008 0.00008 ±0.0008 0.012
5 0.00013 0.00013 ±0.0013 0.02
10 0.00025 0.00025 ±0.0013 0.025
25 0.0006 0.0006 ±0.0025 0.051
50 0.0012 0.0012 ±0.0051 0.076
100 0.0025 0.0025 ±0.0127 0.127
200 0.005 0.005 ±0.025 0.203
1000 0.025 0.025 ±0.127

Basic Info

Model NO.: fuqin-8023
Transport Package: Dry, Light Oil. Plastic Bag-Box-Carton-Case/Barrel
Specification: ISO-9001
Origin: China
HS Code: 84829100
Production Capacity: 500, 000PCS/Week

Product Description

Carbon steel balls
Caption:The Applications
       Light duty bearing,Conveyer belt,
       Bicycle parts,Automobile parts,
       Slide bearing,Caster wheels,
       Computer peripheral products,
       Toys,Metal milling,Hand tools and etc.
Detail:
       Low Carbon-AISI 1010-1015
                 -1mm~30mm
                 G16~G1000

Chrome steel balls
 Caption:The Applications
       Bearing/Automotive
       Cosmetics/Construction
       Body,Jewelry/Heavy Equipment
       Hunting cartridge
Detail:
Chrome steel - GCr15/100Cr6/AISI 52100/SUJ-2

Chemical Composition

Material C% Si% Mn% Cr% Cu%
52100 0.98~1.10 0.15~0.35 0.25~0.45 1.30~1.60
GCr15 0.95~1.05 0.15~0.35 0.25~0.45 1.40~1.65 0.25
GCr15SiMn 0.95~1.05 0.45~0.75 0.95~1.25 1.40~1.65 0.25
100Cr6 0.93~1.05 0.15~0.35 0.25~0.45 1.35~1.60
SUJ2 0.95 or 1.10 0.15 or 0.35 0.50 max 1.30~1.60

Stainless steel ball

Caption: The Applications
       For 300 series
       Trigger sprayers,Bearings,Dispenser valves,
       Body jewelry lotion pumps,Aerospace,Quick
       Disconnect couplings
       For 400 series
       Bearing applications,Valve applications,
       Locking mechanisms,Fasteners,Quick
 
Detail:
Stainless steel - AISI 302/304/304L/316/316L
             -AISI 420/420C/430/440C

Chemical Composition

AISI

Number

 C% Si% Mn% Cr% Ni% Mo% P% S% property
AISI 304 0.07

MAX

 1.00

MAX

 2.00

MAX

 17.0~

19.0

 8.0~

10.5

   0.045

MAX

 0.03

MAX

 Slightly magnetic,flat surface HRC 25min.

 
AISI 316 0.07

MAX

 1.00

MAX

 2.00

MAX

 16.5~

18.5

 10.5~

13.5

 2.00~

2.50

 0.045

MAX

 0.03

MAX

 Better corrosion resistance than
SS304 specially against Sulfuric
acid and ink/bleach/nitric
AISI 420 0.07~

0.25

 1.00

MAX

 1.00

MAX

 12.0~

14.0

     0.045

MAX

 0.03

MAX

flat surface HRC 50min,

better corrosion resistant
AISI 430 0.08

MAX

 1.00

MAX

 1.00

MAX

 15.5~

17.5

     0.045

MAX

 0.03

MAX

 Ferritic stainless steel,better corrosion resistant than 3seriesat higher temperature
AISI 440 0.95~

1.20

 1.00

MAX

 1.00

MAX

 16.0~

18.0

     0.045

MAX

 0.02

MAX

 Martensite,fair corrosion to water, alcohol,oil and food product.
  • Previous:
  • Next:

    • RELATED PRODUCTS