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Zhongshan H. R. T. Precision Steel Ball Co., Ltd.

Steel Balls, Bearing Balls, 7/64" Bearing Balls manufacturer / supplier in China, offering 7/64" Steel Balls for Low Noise Bearings, 1.5mm Chrome Steel Ball for Precision Bearings (GCR15) Ts-16949, 2.381mm Chrome Steel Ball (Gcr15) and so on.

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Supplier Homepage Product Chrome Steel Ball 7/64" Steel Balls for Low Noise Bearings

7/64" Steel Balls for Low Noise Bearings

FOB Price: US $0.05 / Piece
Min. Order: 10,000 Pieces
Min. Order FOB Price
10,000 Pieces US $0.05/ Piece
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Production Capacity: 90, 000, 000PCS/Month
Transport Package: Wooden Case/ Carton, 20kg/Carton
Payment Terms: T/T

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Basic Info
  • Model NO.: 7/64"
  • Certification: CE, ISO
  • Universal: Yes
  • Material: Bearing Steel
  • Size: 7/64"(Inch Size)
  • Certificate: ISO9001:2008, Ts-16949, ISO14001
  • Technical Standard: AISI, JIS, DIN
  • Glass: I,II,III,
  • Trademark: H. R. T.
  • Origin: Zhongshan, China
  • Customized: Customized
  • Standard Parts: Yes
  • Type: Ball
  • Grade: G10, G20, G200
  • Color: Metal Color, Nickel Color
  • Hardness: HRC60-66
  • Delivery Time: Within 5days After Payment
  • Heat Treatment: Quenching Treatment
  • Specification: GB308-2002
  • HS Code: 8482910000
Product Description
7/64" bearing balls for bearings

1) Size: 7/64 inch size, 2.778mm (according to clients' requirement)

2) Materials: Chrome steel, AISI52100

3) Grade: G10

4) Certificate: ISO-9001, TS-16949, ISO14001;

5) Application field: Small balls includes ball bearings, computers, mobile phone lithium battery, REM and mass products like the writing instruments.

6) Heat treatment: Balls are through hardened by heating to 840 degrees C and quenching


The steell balls can be further geometrical designed by additional processes. The focus to the micro and nano subject has become much more important in various international development. A positive example is the new process technology for the production of small steel balls.

Flashing: Balls are ground under pressure between rotating grooved case iron plates to improve sphericity
Heat treatment: Balls are through hardened by heating to 840 degrees C and quenching
They are then tempered to remove excess stresses
Hard grinding: Hardened balls are then ground under pressure between a rotating grinding wheel and a stationary cast iron plate
Finish lapping: Balls are carefully lapped to their final dimensions between grooved cast iron plates, one rotating and stationary
DIN5401(GERMANY) 
   
CLASSNominal Dia.
mm
Tolerances (U)Tolerances Per group (U)Mean interval of each group
(U)
Spherical deviation
I10Max±10.250.5-10~-1.5-1-0.50+0.5+1+1.5~+100.25
II25Max±10.501-10~-3-2-10+1+2+3~+100.5
III25Max±112-10-8-6-4-20+2+4+6+8+101
25-50±13.53 -12-9-6-30+3+6+9+12 1.5
59-75±144  -12-8-40+4+8+12  2
75-100±17.55  -15-10-50+5+10+15  2.5
100-125±21   -18-12-60+6+12+18  3
125-150±24.57  -21-14-70+7+14+21  3.5
IV10Max±144  -12-8-40+4+8+12  2
V25Max±7550    -500+50    25
25-50±11375    -750+75    38
50-70±150100    -1000+100    50
75-100±188125    -1250+125    63
100-125±225150    -1500+150    75
125-150±263175    -1750+175    88
VI ±200400            
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Ms. Emily Huang
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