Bi-Metal Hole Saws
  One Piece Hole Saw  
     
  Arbors & Accessories  
     
  Kits  
 

High speed steel Bi-metal Hole Saws are rugged cutting tools designed to cut accurate holes in machinable materials up to 1-3/8'', 35mm thick. Ranging in size form 9/16",14mm to 6'',152mm in diameter, they can be uses in portable electric, air tools, drill presses, lathes, boring mills, milling machines or any other machine which has a rotating spindle.

Hole Saws have 4/6 vari-pitch tooth design and are recommended for cutting steel and cast iron pipe, steel plates, aluminium, copper, brass, stainless steel, wood and plastics,Furnished in standard size as listed and in handy assortments.

IMPORTANT!

   
   (r/min)  
 
Dia. Mild
Steed
Stainless
Steel
Cast Iron Brass Aluminum Wood
14
580
300
400
790
900
3000
16
550
275
365
730
825
3000
17
500
250
330
665
750
3000
19
460
240
300
600
690
3000
20
435
230
290
580
660
3000
21
425
210
280
560
635
3000
22
390
195
260
520
585
3000
24
370
185
245
495
555
3000
25
350
175
235
470
525
2700
27
325
160
215
435
480
2700
29
300
150
200
400
450
2700
30
285
145
190
380
425
2400
32
275
140
180
360
410
2400
33
260
135
175
345
390
2400
35
250
125
165
330
375
2400
37
240
120
160
315
360
2400
38
230
115
150
300
345
2400
40
220
110
145
290
330
2100
41
210
105
140
280
315
2100
43
205
100
135
270
305
2100
44
195
95
130
260
295
2100
46
190
95
125
250
285
2100
48
180
90
120
240
270
2100
51
170
85
115
230
255
2000
52
165
80
110
220
245
2000
54
160
80
105
210
240
2000
57
150
75
100
200
225
2000
59
145
75
100
195
225
2000
60
140
70
95
190
220
2000
64
135
65
90
180
205
1800
65
130
65
85
175
200
1800
67
130
65
85
170
195
1800
68
130
65
85
170
195
1800
70
125
60
80
160
185
1800
73
120
60
80
160
180
1800
76
115
55
75
150
170
1500
79
110
55
70
140
165
1500
83
105
50
70
140
155
1500
86
100
50
65
130
150
1200
89
95
45
65
130
145
1200
92
95
45
60
120
140
1200
95
90
45
60
120
130
1200
98
90
45
60
120
135
1200
102
85
40
55
110
130
1000
105
80
40
55
110
120
1000
108
80
40
55
110
120
900
111
80
40
50
100
120
900
114
75
35
50
100
105
900
121
70
35
45
95
95
900
127
65
30
40
90
90
800
133
65
30
45
90
90
800
140
60
25
40
85
85
800
146
60
25
40
85
85
800
152
55
25
35
75
75
800


For sale use of hole saws use the correct rotation speed. The correct speed for each size is given in the table.

For longer saw life and lower operating costs, the following recommendation need to be observed:

1.Use the correct arbor for the size saw to be used.

2.Use pin-type arbors for hole saws larger than Dia.32. When mounting, Lift up the disc with the pins and then screw the arbor down into the hole saw as far as it will go. Fit the drive pins into the pin holes in the hole saw by turning the hole saw backwards. Push the pins in .Check that they are securely locked.

3.Check regularly to make sure the drive pins are in the right position.

4.Check that the arbor shank is securely inserted in the chuck on the drive unit. Tighten with chuck key.

5.Cutting oil should be used when sawing steel.
Do not use cutting oil when sawing cast iron. The cutting pressure should, however, be high so that each tooth cuts deep.
Paraffin can be used when sawing aluminium.

6.Use the correct rotation speed! Too high or too low a speed will decrease the life of the cutting edge.

7.If the hole saw vibrates during sawing, the teeth may became damaged and break. The result is often a rough, imperfect hole.

8.Apply the hole saw perpendicular to the workpiece. If the hole saw is titled, this will cause uneven loading and abnormal wear on both the saw teeth and the grilling machine. Moreover, the dimensional accuracy of the hole saw can be affected.

9.Clear away chips and slugs frequently in order to prevent overheating.