Our drill bits are made of Industry grade M35 High Speed Steel, containing 5% cobalt, All grinding drill bit, smooth surface, high grinding precision,
sharp edge, durable
135° standard industrial double rear edge Angle, self-centering to prevent walk-off and faster chip .Double spiral cutting slot design, large capacity
cutting space, good cutting performance, improve drilling efficiency.
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Application
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HSS Grade
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Iron
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Aluminum
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Carbon Steel
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Tile
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Plastic
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Stainless Steel
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4241
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YES
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YES
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NO
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NO
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YES
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NO
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| 4341 | YES | YES | YES | NO | YES | YES |
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6542(M2)
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YES
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YES
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YES
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NO
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YES
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GOOD
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M35 (Co 5%)
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YES
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YES
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YES
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NO
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YES
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VERY GOOD
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| DESCRIPTION OF HSS | C | W | Mo | Cr | V | Co | Si | Mn | P | S |
| % | % | % | % | % | % | % | % | % | % | |
| W4Mo3Cr4V(4341) | 0.88-0.98 | 3.5-4.5 | 2.5-3.5 | 3.8-4.4 | 1.2-1.8 | 0.5-1.2 | 0.2-0.4 | <=0.03 | <=0.03 | |
| W6Mo5Cr4V2(M2) | 0.8-0.9 | 5.5-6.75 | 4.5-5.5 | 3.8-4.4 | 1.75-2.2 | – | 0.2-0.4 | 0.2-0.4 | <=0.03 | <=0.03 |
| W6Mo5Cr4V2Co5(M35) | 0.9-0.95 | 5.5-6.5 | 4.5-5.5 | 3.8-4.4 | 1.75-2.2 | 4.5-5.5 | 0.2-0.4 | 0.2-0.4 | <=0.03 | <=0.03 |
| W2Mo9Cr4V2Co8(M42) | 1.05-1.15 | 1.15-1.85 | 9.0-10.0 | 3.5-4.25 | 0.95-1.25 | 7.75-8.75 | 0.15-0.65 | 0.15-0.4 | <=0.02 | <=0.025 |
Metric size
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DIA.(mm)
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OVERALL LENGTH(mm)
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WORKING LENGTH(mm)
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1
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34
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12
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1.5
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43
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20
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2
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49
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24
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2.5
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57
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30
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3
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61
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33
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3.5
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70
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39
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4
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75
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43
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4.5
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80
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47
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5
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86
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52
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5.5
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93
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57
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6
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93
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57
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6.5
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101
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63
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7
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109
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69
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7.5
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109
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69
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8
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117
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75
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8.5
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117
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75
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9
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125
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81
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9.5
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125
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81
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10
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133
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87
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10.5
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133
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87
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11
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142
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94
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11.5
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142
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94
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12
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151
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101
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12.5
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151
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101
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13
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151
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101
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13.5
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160
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108
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14
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160
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108
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14.5
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169
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114
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15
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169
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114
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15.5
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178
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120
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16
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178
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120
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16.5
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184
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125
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17
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184
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125
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17.5
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191
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130
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18
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191
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130
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18.5
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198
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135
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19
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198
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135
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19.5
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205
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140
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20
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205
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140
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Imperial size
| DIA. | OVERALL LENGTH (INCH) | WORKING LENGTH (INCH) | DIA. | OVERALL | WORKING LENGTH (INCH) |  DIA. |
OVERALL |
WORKING LENGTH (INCH) | |
| 1/64″ | 3/4″ | 3/16″ | 15# | 3-3/8″ | 2-3/16″ | 61# | 1-/5/8″ | 11/16″ | |
| 1/32″ | 1-3/8″ | 1/2″ | 16# | 3-3/8″ | 2-3/16″ | 62# | 1-1/2″ | 5/8″ | |
| 3/64″ | 1-3/4″ | 3/4″ | 17# | 3-3/8″ | 2-3/16″ | 63# | 1-1/2″ | 5/8″ | |
| 1/16″ | 1-7/8″ | 7/8″ | 18# | 3-1/4″ | 2-1/8″ | 64# | 1-1/2″ | 5/8″ | |
| 5/64″ | 2″ | 1″ | 19# | 3-1/4″ | 2-1/8″ | 65# | 1-1/2″ | 5/8″ | |
| 3/32″ | 2-1/4″ | 1-1/4″ | 20# | 3-1/4″ | 2-1/8″ | 66# | 1-3/8″ | 1/2″ | |
| 7/64″ | 2-5/8″ | 1-1/2″ | 21# | 3-1/4″ | 2-1/8″ | 67# | 1-3/8″ | 1/2″ | |
| 1/8″ | 2-3/4″ | 1-5/8″ | 22# | 3-1/8″ | 2″ | 68# | 1-3/8″ | 1/2″ | |
| 9/64″ | 2-7/8″ | 1-3/4″ | 23# | 3-1/8″ | 2” | 69# | 1-3/8″ | 1/2″ | |
| 5/32″ | 3-1/8″ | 2″ | 24# | 3-1/8″ | 2″ | 70# | 1-1/4″ | 3/8″ | |
| 11/64″ | 3-1/4″ | 2-1/8″ | 25# | 3″ | 1-7/8” | 71# | 1-1/4″ | 3/8″ | |
| 3/16″ | 3-1/2″ | 2-5/16″ | 26# | 3″ | 1-7/8″ | 72# | 1-1/8″ | 5/16″ | |
| 13/64″ | 3-5/8″ | 2-7/16″ | 27# | 3” | 1-7/8″ | 73# | 1-1/8″ | 5/16″ | |
| 7/32″ | 3-3/4″ | 2-1/2″ | 28# | 2-7/8″ | 1-3/4″ | 74# | 1″ | 1/4″ | |
| 15/64″ | 3-7/8″ | 2-5/8″ | 29# | 2-7/8″ | 1-3/4″ | 75# | 1″ | 1/4″ | |
| 1/4″ | 4″ | 2-3/4″ | 30# | 2-3/4″ | 1-5/8″ | 76# | 7/8″ | 3/16″ | |
| 17/64″ | 4-1/8″ | 2-7/8″ | 31# | 2-3/4″ | 1-5/8″ | 77# | 7/8″ | 3/16″ | |
| 9/32″ | 4-1/4″ | 2-15/16″ | 32# | 2-3/4″ | 1-5/8″ | 78# | 7/8″ | 3/16″ | |
| 19/64″ | 4-3/8″ | 3-1/16″ | 33# | 2-5/8″ | 1-1/2″ | 79# | 3/4″ | 1/8″ | |
| 5/16″ | 4-1/2″ | 3-3/16″ | 34# | 2-5/8″ | 1-1/2″ | 80# | 3/4″ | 1/8″ | |
| 21/64″ | 4-5/8″ | 3-5/16″ | 35# | 2-5/8″ | 1-1/2″ | A | 3-/7/8″ | 2-5/8″ | |
| 11/32″ | 4-3/4″ | 3-7/16″ | 36# | 2-1/2″ | 1-7/16″ | B | 4″ | 2-3/4″ | |
| 23/64″ | 4-7/8″ | 3-1/2″ | 37# | 2-1/2″ | 1-7/16″ | C | 4″ | 2-3/4″ | |
| 3/8″ | 5″ | 3-5/8″ | 38# | 2-1/2″ | 1-7/16″ | D | 4″ | 2-3/4″ | |
| 25/64″ | 5-1/8″ | 3-3/4″ | 39# | 2-3/8″ | 1-3/8” | E | 4″ | 2-3/4″ | |
| 13/32″ | 5-1/4″ | 3-7/8″ | 40# | 2-3/8″ | 1-3/8″ | F | 4-/1/8″ | 2-7/8″ | |
| 27/64″ | 5-3/8″ | 3-15/16″ | 41# | 2-3/8″ | 1-3/8″ | G | 4-/1/8″ | 2-7/8″ | |
| 7/16″ | 5-1/2″ | 4-1/16″ | 42# | 2-1/4″ | 1-1/4″ | H | 4-/1/8″ | 2-7/8″ | |
| 29/64″ | 5-5/8″ | 4-3/16″ | 43# | 2-1/4″ | 1-1/4″ | I | 4-1/8” | 2-7/8″ | |
| 15/32″ | 5-3/4″ | 4-5/16″ | 44# | 2-1/8″ | 1-1/8″ | J | 4-/1/8″ | 2-7/8″ | |
| 31/64″ | 5-7/8″ | 4-3/8″ | 45# | 2-1/8″ | 1-1/8″ | K | 4-/1/4″ | 2-15/16″ | |
| 1/2″ | 6″ | 4-1/2″ | 46# | 2-1/8″ | 1-1/8″ | L | 4-/1/4″ | 2-15/16″ | |
| 1# | 3-7/8″ | 2-5/8″ | 47# | 2″ | 1″ | M | 4-3/8″ | 3-1/16″ | |
| 2# | 3-7/8″ | 2-5/8″ | 48# | 2″ | 1″ | N | 4-3/8″ | 3-1/16″ | |
| 3# | 3-3/4″ | 2-1/2″ | 49# | 2″ | 1″ | O | 4-1/2″ | 3-3/16″ | |
| 4# | 3-3/4″ | 2-1/2″ | 50# | 2″ | 1″ | P | 4-5/8″ | 3-5/16″ | |
| 5# | 3-3/4″ | 2-1/2″ | 51# | 2″ | 1″ | Q | 4-3/4″ | 3-7/16″ | |
| 6# | 3-3/4″ | 2-1/2″ | 52# | 1-7/8″ | 7/8″ | R | 4-3/4″ | 3-7/16″ | |
| 7# | 3-5/8″ | 2-7/16″ | 53# | 1-7/8″ | 7/8″ | S | 4-7/8″ | 3-1/2″ | |
| 8# | 3-5/8″ | 2-7/16″ | 54# | 1-7/8″ | 7/8″ | T | 4-7/8″ | 3-1/2″ | |
| 9# | 3-5/8″ | 2-7/16″ | 55# | 1-7/8″ | 7/8″ | U | 5″ | 3-5/8″ | |
| 10# | 3-5/8″ | 2-7/16″ | 56# | 1-3/4″ | 3/4″ | V | 5″ | 3-5/8″ | |
| 11# | 3-1/2″ | 2-5/16″ | 57# | 1-3/4″ | 3/4″ | W | 5-1/8″ | 3-3/4″ | |
| 12# | 3-1/2″ | 2-5/16″ | 58# | 1-5/8″ | 11/16″ | X | 5-1/8″ | 3-3/4″ | |
| 13# | 3-1/2″ | 2-5/16″ | 59# | 1-5/8″ | 11/16″ | Y | 5-1/4″ | 3-7/8″ | |
| 14# | 3-3/8″ | 2-3/16″ | 60# | 1-5/8″ | 11/16″ | Z | 5-1/4″ |
3-7/8 “ |
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