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What Are The Recommended Rpms For Different Types Of Power Brushes

What Are The Recommended Rpms For Different Types Of Power Brushes

What Are The Recommended Rpms For Different Types Of Power Brushes

DRIVING BRUSHES NEEDS HORSEPOWER

Horsepower requirements for driving a power brush are often determined by four factors:

  • The need for a strong brush.
  • Resistance (trim length) between the work surface and the brush.
  • The brush's speed.
  • width of the brush face.

Estimated horsepower chart (based on a medium brushing action for a 1" brush face)

BRUSH DIAMETER

MOTOR SIZE

RPM

4”

¼ H.P.

3450

6”

½ H.P.

3450

8”

¾ H.P.

3450

10”

1 H.P.

1750

12”

1 H.P.

1750

15”

1 ½ H.P.

1750


The amount of horsepower needed for wide-face brushes depends on the relative brush load. Short-trim brushes typically require more horsepower than long-trim brushes.

SURFACE SPEEDS THAT ARE RECOMMENDED FOR BRUSHING APPLICATIONS

APPLICATION

SURFACE FT. PER MINUTE

Removing burrs

5,500 to 7,500

Removing scale

7,500 to 10,000

Cleaning welds

7,200 to 9,400

Edging blending

4,700 to 7,500

Cleaning (dry)

4,000 to 5,000

Cleaning (wet)

1,900 to 4,000

Surface polishing

6,400 to 8,000

Surface buffing

8,0000 to 10,000


SURFACE SPEEDS TABLE (PERIPHERAL SPEED IN FT/MIN)

RPM

1” DIA

2”DIA

3”DIA

4”DIA

6”DIA

7”DIA

8”DIA

10”DIA

12”DIA

14”DIA

15”DIA

900

236

471

707

942

1414

1649

1885

2356

2827

3299

3534

1150

301

602

903

1204

1806

2107

2409

3011

3613

4215

4516

1200

314

628

942

1257

1885

2199

2513

3142

3770

4398

4712

1500

393

785

1178

1571

2356

2749

3142

3927

4712

5498

5891

1750

458

916

1374

1833

2749

3207

3665

4582

5498

6414

6872

2000

524

1047

1571

2094

3142

3665

4189

5236

6283

7330

7854

2400

628

1257

1885

2513

3770

4398

5027

6283

7540

8796

9425

2800

733

1466

2199

2932

4398

5131

5864

7330

8796

10263

10996

3000

785

1571

2356

3142

4712

5498

6283

7854

9425

10996

11781

3200

838

1676

2513

3351

5027

5864

6702

8378

10053

11729

12566

3400

890

1780

2670

3560

5341

6231

7121

8901

10681

12462

13352

3750

982

1964

2945

3927

5891

6872

7854

9818

11781

1374

4000

1047

2094

3142

4189

6283

7330

8378

10472

12566

4500

1178

2536

3534

4712

7069

8247

9425

11781

14137

5000

1309

2618

3927

5236

7854

9163

10472

13090

5400

1414

2827

4241

5655

8482

9896

11310

6000

1571

3142

4712

6283

9425

10996

12566


BRUSHING ACTION

Power brushing conditions are subject to several variations. Many times, using one or more power brushes will yield the same results; nevertheless, if using only one brush does not yield the intended outcomes, consider the advice below:

RESULTS CHANGES AIM FOR

  • Change in brush suggested.

QUICKER ACTION

  • Speed up your brushing.
  • Employ thicker filament or wire.
  • Use a brush that has been trimmed short.
  • Increase RPM or use a wider brush.

SUPERIOR FINISH

  • Employ finer filament or wire.
  • Try using a nylon filament brush or Tampico.

REACH UNUSUAL SURFACE AREA

  • For increased versatility, use a brush with a longer trim length.

REDUCED LIFE

  • Use longer trim and finer wire.

INSTEAD OF ROUGHING OR PREENING IT, REMOVE THE BURR

  • Boost the brush's speed.
  • Use a shorter brush.
  • To check if the tips are cutting or wiping, check the brushing pressure.

Note: The brush's rotational speed is crucial. (See the Surface Speed Table).

TOOLS THAT ARE PORTABLE

Brushes with a maximum recommended diameter of 6" should be used with electric or air-powered portable tools.

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