Balls AISI 52100 (Ш Х15)

CHROME STEEL BALLS AISI 52100 UNI 100C6 (ШХ 15)

These balls are commonly used in precision ball bearings and find wide application in industry. Balls made of this material are characterized by their excellent surface polishing, sufficient hardness and ability to carry heavy loads, excellent wear resistance and resistibility to deformations. The Chrome Steel Balls are hardened through to obtain maximal mechanical strength.

      Diameters: 0,30-250mm

      Accuracy grades: ISO 3290 G3–5–10–16–20–28–40–100–200–AFBMAG500/G1000 
    Materials conformance with international standards: AFN 100C6 – B.S. EN 31 – JIS G4805 – SUJ2 – ASTM 100C6.

CHEMICAL COMPOSITION, %
C Si Mn P S Cr
0,90 0,15 0,25 0,025 0,025 1,3
1,10 0,35 0,45 max. max. 1,6
Mechanical Hardness Index   Mechanical Properties :
up to 12,7 mm HRC 62/66   Breaking strength: 228 kgf/mm2
12,70 – 50,80 mm HRC 60/66   Compression strength: 207 kgf/mm2
50,8 – 70 mm HRC 59/65   Modulus of elasticity: 20,748 kgf/mm2
70 – 120 mm HRC 57/63   Specific weight: 7,830 kgf/mm2
      Optimum working temperature +468оС

               Materials conformity with GOST 3722-81

                         Technical Requirements

The balls are to be produced in compliance with requirements to the present standard according to the working drawings approved at the stated order.

The balls have to be made of steel according to GOST 801-78 and GOST 4727-67. It’s allowed to produce the balls of other steel grades upon customer’s request.

The balls are to be heat treated:

up to hardness HRC  62…66 – at diameters up to 45 mm;

up to hardness HRC  60…66 – at diameters more than 45 mm.

There are 10 balls accuracy grades designated in the order of degradation of accuracy with the following numbers: 3;5;10;16;20;28;40;60;100;200.

Mean diameter deviation, difference of balls sizes in a batch, single diameter variation, sphericity deviation (not considering waviness) and surface roughness shall not override.  

The balls of sizes over 45 mm have to pass a compression test. Test compressive load and ball diameter change under the load depending on ball size are to be in compliance with the following values:

Ball nominal diameter  Dw mm 46,038 50,8 60 76,2 100 101,6 150
Load, кН (тс) 63,7 (6,5) 78,45 (8) 98,07 (10) 147,1 (15) 245,17 (25) 245,17 (25) 490,33 (50)
Difference of balls sizes, measured before and after compression, micron, no more 2,5 3 3 3 4 4 6