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Product Data Sheet: Grinding Ball Specification

This document provides specifications for grinding balls in various sizes ranging from 3/4 inch to 5 inches. For each size, it lists the target weight, actual diameter range, surface hardness, core hardness, volume hardness, and material. All grinding balls are made of material B2 or B3 with specified hardness measurements and meet standards for roundness and metallographic structure. The document also notes a breakage guarantee and lists chemical composition requirements for the materials.

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Vivek Shrivastava
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142 views3 pages

Product Data Sheet: Grinding Ball Specification

This document provides specifications for grinding balls in various sizes ranging from 3/4 inch to 5 inches. For each size, it lists the target weight, actual diameter range, surface hardness, core hardness, volume hardness, and material. All grinding balls are made of material B2 or B3 with specified hardness measurements and meet standards for roundness and metallographic structure. The document also notes a breakage guarantee and lists chemical composition requirements for the materials.

Uploaded by

Vivek Shrivastava
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Product data sheet

GRINDING BALL SPECIFICATION

T weight Actual Diameter Surface hardness Core hardness Volume Hardness


Inch Size Material
（Kg） Range (mm) (HRC)+/-0.5HRC (HRC)+/-0.5HRC (HRC)+/-0.5HRC
19.3~22.3
3/4 ” D20MM 0.039+/-0.005 B2 63-66 62-64 63-66
24.5~27.5
1” D25MM 0.075+/-0.01 B2 63-66 62-64 63-66
29.7~32.7
1 1/4 ” D30MM 0.14+/-0.02 B2 63-66 62-64 63-66
39.6~43.6
1 1/2 ” D40MM 0.31+/-0.04 B2 63-66 62-64 63-66
50~54
2” D50MM 0.59+/-0.05 B2 62-65 61-63.5 62-65
60.4~64.4
2 1/2 ” D60MM 1.0+/-0.05 B2 62-65 59-61 61-64
65.6~70.6
2 1/2 ” D65MM 1.25+/-0.07 B2 62-65 59-61 61-64
65.6~70.6
2 1/2 ” D65MM 1.25+/-0.07 B3 61-63 58-60 58-62

3” D75MM 1.9+/-0.1 76~81 B2 61-63 59-62 60-63


T weight Actual Diameter Surface hardness Core hardness Volume Hardness
Inch Size Material
（Kg） Range (mm) (HRC)+/-0.5HRC (HRC)+/-0.5HRC (HRC)+/-0.5HRC
76~81
3” D75MM 1.9+/-0.1 B3 61-63 58-60 58-62
88~93.5
3 1/2” D90MM 3.1+/-0.15 B3 60-62 57-60 59-62
92~97.5
3 3/4” D94MM 3.5+/-0.2 B3 60-62 57-60 59-62
98~103
4” D100MM 4.1+/-0.2 B3 60-62 57-60 59-62
103~108
4.2” D105MM 4.76+/-0.2 B3 59-62 57-60 59-62
113~118
4.5” D115MM 6.3+/-0.2 B3 59-62 57-60 58-62
123~128.5
5” D125MM 8.2+/-0.3 B3 58-62 57-60 58-62

note：
1. Roundness: Spherical with little overfill or underfill within the national standard: GB-8649-88 and YB/T 091-2005
2. Metallographic structure: Substantially martensite with some retained Austenite, Bainite& Carbides
3. Breakage guarantee: -Nil breakages upon delivery
-Less than 1% in normal and correct operation conditions
CHEMICAL COMPOSITION

C Si Mn P≤ S≤ Cr Ni≤ Cu≤

B2 0.72-0.86 0.15-0.37 0.70-0.80 0.035 0.035 0.20-0.60 0.25 0.25

B3 0.58-0.66 1.30-1.90 0.40-0.80 0.035 0.035 0.70-0.90 0.25 0.25

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