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Bi-Metal

RECOMMENDED HOLE SAW SPEED REFERENCE CHART

SPEEDS SHOWN ARE ONLY A GUIDELINE / SUGGESTION TO HELP OPTIMIZE THE PERFORMANCE OF BI-METAL HOLESAWS.

SIZE INCHES

MILD STEEL

TOOL STEEL & STAINLESS

CAST IRON

BRASS

ALUMINUM

9/16”

550

300

400

790

900

5/8”

530

275

365

730

825

11/16”

500

250

330

665

750

3/4”

460

230

300

600

690

13/16”

425

210

280

560

630

15/16”

370

185

245

495

555

350

175

235

470

525

1-1/16”

325

160

215

435

480

1-1/8”

300

150

200

400

450

1-3/16”

285

145

190

380

425

1-1/4”

275

140

180

360

410

1-3/8”

250

125

165

330

375

1-1/2”

230

115

150

300

345

1-1/4”

275

140

180

360

410

1-5/16”

260

135

175

345

390

1-3/8”

250

125

165

330

375

1-7/16”

240

120

160

315

360

1-1/2”

230

115

150

300

345

1-9/16”

220

110

145

290

330

1-5/8”

210

105

140

280

315

1-11/16”

205

100

135

270

305

1-3/4”

195

95

130

260

295

1-13/16”

190

95

125

250

285

1-7/8”

180

90

120

240

270

170

85

115

230

255

2-1/16”

165

80

110

220

245

2-1/8”

160

80

105

210

240

 

 

 


4/6 Bi-Metal

RECOMMENDED HOLE SAW SPEED REFERENCE CHART

SPEEDS SHOWN ARE ONLY A GUIDELINE OR SUGGESTION TO OPTIMIZE THE BASIC PERFORMANCE OF COMMON HOLESAWS.

SIZE INCHES

MILD STEEL

TOOL STEEL & STAINLESS

CAST IRON

BRASS

ALUMINUM

           

2-1/4”

150

75

100

200

230

2-5/16”

145

75

100

195

225

2-3/8”

140

70

95

190

220

2-1/2”

135

70

90

180

205

2-9/16”

130

65

85

175

200

2-5/8”

130

65

85

170

195

2-3/4”

125

60

80

160

185

2-7/8”

120

60

80

160

180

115

55

75

150

170

3-1/8”

110

55

70

145

165

3-1/4”

105

50

70

140

155

3-3/8”

100

50

65

130

150

3-1/2”

95

45

60

125

145

3-5/8”

95

45

60

120

140

3-3/4”

90

45

60

120

135

3-7/8”

90

45

60

115

130

85

40

55

115

125

4-1/8”

85

40

55

110

120

4-1/4”

80

40

55

110

115

4-3/8”

80

40

50

100

110

4-1/2”

75

35

50

100

105

4-3/4”

70

35

45

90

95

65

30

40

85

90

5-1/2”

60

30

35

80

85

5-3/4”

55

25

35

75

80

55

25

35

75

80

SIZE INCHES

MILD STEEL

TOOL STEEL & STAINLESS

CAST IRON

BRASS

ALUMINUM

 

 

 

 

DO

Operate holesaw at the recommended speed.  See RPM table.

DO

Apply sufficient feed pressure when sawing, about 80 to 100 pounds per inch of hole saw diameter. (More for harder materials, less for softer.) Drive Plates to reinforce the back of the Holesaw may be suggested on larger diameter holesaws.

DO

Set pilot drill point about 1/8” beyond the tooth points enough to establish and hold a center. Better yet, drill pilot hole with Ό” drill bit and use Ό” drill rod for pilot. This is the way the professional does it.

DO

Use a good grade of cutting oil to assure cleaner cut and longer blade life.  (To those who think WD-40 is a cutting oil - it is not)

DO

Chuck the holesaw properly.

DO

Hold saw perpendicular to the surface of material being cut.

DO

Hold hole saw and drive until steady – drill press or lathe is best when possible.

DO

Be sure to fix arbor to holesaw firmly. Drive pins should be fully engaged in drive pin holes.

DO

Keep drive pins locked into drive pin holes with threaded retainer.

DO

Wear safety glasses and keep idle hands away from the sawing operation.

 

DON’T

Run a holesaw too fast- it will cut faster at a slower speed than it does at speed higher than recommended.  If it runs too fast, it will not cut, but wear out.

DON’T

Allow tooth points to rub over the work without digging in to take a chip.  Rubbing the tooth points dulls them so they can’t cut.

DON’T

Set the pilot drill point beyond the tooth points more than the thickness of the work. If the drill pierces the work before the saw teeth are in contact, the saw can hit the work with sufficient shock to break the saw or the teeth.

DON’T

Operate hole saws without cutting oil (except in cast iron) or the abrasion will cause enough heat to damage the cutting ability of the saw.

DON’T

Chuck too loosely or off center.  An improperly chucked hole saw will cause damaging vibrations.

DON’T

Try to saw holes at an angle to the work surface.  When teeth do not contact the work evenly the hole saw will be twisted out of round and will break.

DON’T

Allow hole saw and drive unit to wobble or orbit around the pilot drill, as this sets up damaging stresses to strip the teeth or break the saw.

DON’T

Begin sawing with arbor so loose in cap that it will (1) Tear our threads in saw cap, or (2) become inseparable (too tightly screwed in).

DON’T

Allow drive pins to retract from holes while saw is in operation. Loose drive pins can grind a hole in the cap.

DON’T

Let loose clothing or long hair get near a revolving hole saw.

 

 


God Bless America

Fairbury Fastener
23092 E. 800 North Rd. / U.S. Rt 24 East
Fairbury, IL 61739
Phone:  (815) 692-3848
  
FAX:  (815) 692-2200
E- Mail: 
sales @ fairbury fastener . com

Call 815-692-3848
to place your order

We do NOT process international orders.  Prices are subject to change and may be different than shown on our site.  
Call for current pricing.
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