PERIPHERAL SPEED

The peripheral speed for diamond saw blades should lie between 20 to 65 meters per second depending on the hardness and abrasiveness of the material to be sawn.

Table 1 shows the recommended peripheral speeds for different materials, and table 2 shows the motor rpm needed to obtain required peripheral speed.

TABLE 1

Material                                 Peripheral Speed

                                                           m/sec

Hard compact materials like             20-30

Granite, porphyry, diabase,

Refractory bricks, etc.

Medium hard and compact               20-50

Materials like marble, serpentinite,

Soft granite, sandstone etc.

Abrasive materials like soft              50-65

Sandstone travertine, etc.

Lower peripheral speed will accelerate the wear, higher peripheral speed will result in less cutting power.

CUTTING SPEED

Cutting speed is the quantity of material sawn during a certain time period and generally expressed as cm2/min. Peripheral speed, together with the rate of feed determines the cutting speed. Maximum performance is only possible with the right cutting speed. Cutting speed of a circular saw blade in marble should be about 500 cm2/min.

An excessively high cutting speed will cause premature wear by tearing out the diamond particles whereas excessively low cutting speeds will cause the diamond particles to become shiny and not penetrate into the stone sufficiently.

FLANGES

Flange diameter depends on the blade diameter (see Table 3 for recommended flange diameters).

Flanges must be free of rust, dirt, grease, and deformation. Flange rims must be seated well and bolts secured tight.

MOUNTING OF SAW BLADES

An arrow on the blade disc shows the rotation direction. It is important not to make a mistake in the direction where frequent dismantling is necessary.

CUTTING IN STEPS

Hard materials like granite, diabase, porphyry, porcelaine, etc., should be cut in steps. If the saw tends to loose its cutting speed, the depth of the step should be reduced and the feed should be increased.

FLUSHING WATER

It is important to have effective flushing of the cuttings and cooling of the segments. Sufficient quantity of flushing water should be applied to both faces of the disc at a point near the flanges.

The pressure of the flushing water is not important so long the quantity is sufficient (see Table 3 for recommended water flow).

MACHINE

Sawing machine should be robust and free from vibrations. Vibration increases the wear of segments.

Motor must be of sufficient power (see Table 3 for recommended motor powers).

-          The table should be positioned exactly parallel to the saw blade and there should not be any deviation. Otherwise abnormal wear will result on the blade and the cut will be uneven and splintered.

The bore of the disc should fit the spindle tightly, and the shaft should be centered.

DIA,

mm

PERIPHERY SPEED (m/sec)

25

30

35

40

45

50

55

60

65

250

1910

2290

2680

3060

3440

3820

4200

4590

4970

300

1590

1910

2230

2550

2870

3190

3500

3820

4140

350

1370

1640

1910

2180

2460

2730

3000

3280

3550

400

1190

1430

1670

1910

2150

2390

2630

2870

3100

450

1060

1270

1490

1700

1910

2120

2330

2550

2760

500

950

1150

1340

1530

1720

1910

2100

2290

2480

550

900

1000

1200

1400

1600

1700

1900

2100

2200

600

800

950

1110

1280

1430

1590

1750

1910

2070

650

730

880

1030

1180

1320

1470

1620

1760

1910

700

680

820

950

1090

1230

1360

1500

1640

1780

800

600

700

850

950

1050

1200

1350

1450

1550

850

560

670

790

900

1010

1120

1240

1350

1460

900

530

640

740

850

950

1060

1170

1270

1380

1000

480

570

670

760

860

950

1050

1150

1240

1100

430

520

610

690

780

870

950

1040

1130

1200

400

480

560

640

720

800

880

950

1030

1300

370

440

510

590

660

730

800

880

950

1400

340

410

480

550

610

680

750

820

890

1600

300

360

420

480

540

600

660

720

780

1800

260

320

370

420

480

530

580

640

690

2000

240

290

330

380

430

480

520

570

620

                                Resim 2

DIA

mm

SEGMENT QUANTITY

SEGMENT SIZE

DISC THICKNESS

BORE DIA

FLANGE DIA (mm)

MOTOR RATING kw

FLUSHING WATER lt/min

DISC WEIGHT (kg)

W

H

L

250

15

2.2

7

40

1.6

30

100

5.5-7.5

6-10

0.6

300

21

3.4

7

40

1.8

60

120

7.5-11

10-15

1

350

25&27

3.4

7

40

2.2

60

140

7.5-11

10-15

1.6

400

28

3.8

7

40

2.5

60

150

7.5-11

10-15

2.5

450

32

4

7

40

2.8

60

160

11-15

15-20

3.4

500

36

4

7

40

2.8

60

170

11-15

20-30

4.1

600

36&42

4.6

7

40

3.5

60

180

15-18.5

30-35

7.5

650

39

5.8

7

40

4

60

200

15-20

30-35

10

725

50

5.8

7

40

4

60

200

18-22

30-35

12.6

800

46&57

5.8

7

40

4.5

60

225

25-30

30-40

17

850

50

6.5

7

40

4.5

60

240

25-30

30-40

19.5

900

64

5.8

7

40

5

80

250

30-37

30-40

25

1000

70

7.5

7.5

24

5

100

270

35-45

40-50

30

1100

74

8

8

24

5.5

100

300

35-45

40-50

40

1200

80

8

8

24

5.5

100

300

35-45

50-60

47.5

1300

88

9

9

24

6

120

300

40-45

50-60

60

1400

92

9

9

24

6.5

120

325

45-75

60-70

77

1600

104

9

9

24

6.5

120

375

45-75

60-70

100

1700

110

10

10

24

7

120

390

45-75

60-70

121

1750

112

10

10

24

7

120

400

55-75

70-80

129

1800

120

10

10

24

7

120

400

70-80

140

2000

132

11

10

24

8

120

425

55-75

70-80

197

400 ST

24

5.8

7

40

3.5

60

18

13-15

15-20

3.2

450 ST

26

5.8

7

40

3.5

60

20

13-15

15-20

4.6

500 ST

30

5.8

7

40

3.5

60

24

15-17

18-20

5.4

PROBLEM

CAUSE

REMEDY

BLADE WILL NOT CUT

 Bad spindle bearings, worn mounting arbor, or misaligned shaft.

V-belt is not tighten properly, or insufficient power to permit blade to cut properly.

Blade has become dull, or segments are broken.

Replace the worn parts.

Tighten belts in accordance with machine maintenance instructions. Use correct voltage at motor and use adequate horsepower for the cutting application.

Allow blade to sharpen itself on the material to be cut when first placing it on the saw.

LOSS OF TENSION

Blade blank has been overheated.

Blade blank has been overheated as a result of blade spinning on mounting arbor.

High penetration rate

Provide proper amount of water to both sides of blade. Check to make sure water pump is producing sufficient water and that no blockages occur in water lines.Properly align saw to permit square cutting. Avoid twisting the blade in cut. Make certain that shaft r.p.m. is correct, so that blade operates at its tensioned speed, and consequently runs perfectly straight.

UNEVEN SEGMENT WEAR

Insufficient water, generally on one side of the blade, which reduces side clearance.

Equipment defecet, which causes the blade to wear out of round unevenly.

Saw head misaligned.

Flush water system. Make certain that water is being adequately and equally distributed to both sides of the blade. Replace bad bearings, worn arbor shaft, or misaligned spindle. Make certain the engine runs smoothly, to prevent harmonic vibrations, which in turn cause the blade to pount on a regular cycle basis.

Check saw head alignment for squareness both vertically and horizontally.

SHORT LIFE

Using the wrong blade on a specific material. Inadequate water to the blade.

Flushing water quantity is inadequate.

Use the proper blade specification, as recommended by the manufacturer.

 Use sufficient water to flush fines out of cut. If generated fines are highly abrasive, wear-retardant steel cores should be used. Make sure water hoses are clean and free from any blockages. Flush water system. Make certain that water is being adequately and equally distributed to both sides of the blade

SEGMENT LOSS

Overheating, due to inadequate supply of water or complete loss of water.

Defective flange which cause the blade to flutter in the cut or fail adequately support the blade in perfect alignment.

Use sufficient water to flush fines out of cut. If generated fines are highly abrasive, wear-retardant steel cores should be used. Make sure water hoses are clean and free from any blockages. Flush water system. Make certain that water is being adequately and equally distributed to both sides of the blade

Clean foreign material from blade clamping disc surfaces, or replace clamping if they are under manufacturer’s recommended diameter.

ÇAP , mm

Karot boyu

DişTipi

                             Soket Ölçüleri

  L

    W

  X

       30

        400

   R ½”

          10

            5

         7

       40

       50

       60

       70

       80

I ¼” UNC

       90

      100

      110

      120