Our test methods
Catalog
Technical information
1. Geometrical parameters.
Diameter and thickness of wheels
| Size | Tolerance |
| Outer diameter, mm: ≤ 100 > 100 « 150 « « 150 « 400 « « 400 « 600 « | ±2,0 |
| Wheel thickness: > 1,6 ≤ 1,6 « 3,2 « « 3,2 « 4,0 « « 4,0 « 5,0 « « 5,0 « 6,0 « « 6,0 « 10 « | ±0,2 |
Radial and axial run-out
| D | Radial and axial runout |
| ≤ 100 | 0,5 |
| > 100 « 150 « | 0,6 |
| « 150 « 200 « | 0,8 |
| « 200 « 300 « | 1,0 |
| « 300 « 400 « | 1,2 |
| « 400 « 1000 « | 1,6 |
2. Performance tests.
The main parameter of the durability of the cut abrasive wheel is the cutting / grinding coefficient (K), which is defined as the ratio of the area of the cut workpiece to the area of the worn part of the wheel at operation of a grinding wheel to 0,75 of the initial diameter. K is calculated by the formula:
S3 – area of the cut workpiece, cm2
DH & DK- cutting diameter before and after cutting, cm
n – number of wheel cuts
| Circle diameter D, mm | largest diameter blanks, mm | Motor power, kW not less | Grinding ratio at least |
| 180 | 16 | 4 | 2,3 |
| 200 | 18 | 4 | 2,3 |
| 230 | 20 | 4 | 2,3 |
| 300 | 25 | 10 | 2,3 |
| 400 | 32 | 17 | 2,3 |
| 500 | 50 | 25 | 1,6 |
Текущая же версия ГОСТа не регламентирует минимальные К шлифования для полного спектра размеров кругов, ограничиваясь следующей информацией:
Обозначение круга | Режим резания | Коэффициент резания, не менее | |||
Обрабатываемый материал | Подача, мм/мин | Рабочая скорость круга, м/с | Мощность двигателя, кВт, не менее | ||
| 41,42-400x4x32 14А63-Н; 80-Н 35-39 BFM | Сталь 10: труба 83×4 мм | 200-300 | 80 | 15 (стационарные машины) | 2,5 |
41,42-400x4x32 51C63-H35-39BFNM | Кирпич шамотный 230хх113х65 мм | 300-700 | 80 | 4 (стационарные машины) | 30,0 |
41,42-400x4x32 14A40-H33-37RM | Сталь 45: труба 25×4,5 мм | 700-900 | 60 | 15 (стационарные машины) | 0,90 |
41, 42 – 230х3,0 (2,5)х22,23 14А40-Н; 63-Н 35-39 BFM | Сталь 10: труба 21,3×2,8 мм | 200-300 | 80 | 1,8 (ручные и переносные машины) | 1,5 |
Today, grinding wheel manufacturers use their own methods of evaluating the durability of grinding wheels, different types and power of the grinding machine, material and profile of the material to be cut, number ofmaterial being cut, profile, number of cuts, and feed rate. In this case, it is most important to ensure equal testing conditions for all the wheels being tested.
Based on the most demanded conditions on the market, our technicians,оur technicians have developed the following methodology, which has been applied for more than 10 years at all stages of quality control – from quality control inspection at all stages of production to post – production quality control when received at the regional warehouse and comparative tests with competing products.
Minimum sample quantity for testing during performance inspection:
D115 – D150 – 5 pcs.
D180 – D230 – 3 pcs.
D300 – D400 – 2 pcs.
An example of our acceptance procedure for lap wheel quality given below:
| Circle size | Material | Number of cuts | Max. time 1 cut, sec. | Grinder brand | min K |
| 125×1,2×22,23 | Ø 14мм, ст 45 | 25 | 5 | Bosch 1200W 2800-11500 rpm | 1,0 |
| 230×2,0x22,23 | Ø 24мм, ст 45 | 35 | 12 | Bosch 2000W 6500rpm | 1,0 |
In comparative tests of wheels of different grades and production dates, to exclude possible difference in durability due to storage and transportation conditions it is allowed to dry the wheels in the bakelizer at 160C for 6h.