Nitro Stubby Drill Bit
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Nitro Stubby Drill Bit

High Speed Steel Nitro drill bits offer superior performance over conventional HSS drills. Their Nitride treated, heavy-duty construction increases tool life and performance. 135 degree Split Point reduces walking at the drill point and makes these drills ideal for both hand held and CNC Operations. Black & Gold surface treatment for maximum lubricity. Usable in a wide range of materials including difficult to machine materials such as stainless steel.

Dimensional SpecificationsNitro Stubby

Size Decimal
Equivalent
Flute
Length
Overall
Length
1/16 0.0625 5/8 1 5/8
5/64 0.0781 11/16 1 11/16
3/32 0.0938 3/4 1 3/4
7/64 0.1094 13/16 1 13/16
1/8 0.1250 7/8 1 7/8
9/64 0.1406 15/16 1 15/16
5/32 0.1563 1 2 1/16
11/64 0.1719 1 1/16 2 1/8
3/16 0.1875 1 1/8 2 3/16
13/64 0.2031 1 3/16 2 1/4
7/32 0.2188 1 1/4 2 3/8
15/64 0.2344 1 5/16 2 7/16
1/4 0.2500 1 3/8 2 1/2
17/64 0.2656 1 7/16 2 5/8
9/32 0.2813 1 1/2 2 11/16
19/64 0.2969 1 9/16 2 3/4
5/16 0.3125 1 5/8 2 13/16
21/64 0.3281 1 11/16 2 15/16
11/32 0.3438 1 11/16 3
23/64 0.3594 1 3/4 3 1/16
3/8 0.3750 1 13/16 3 1/8
25/64 0.3906 1 7/8 3 1/4
13/32 0.4063 1 15/16 3 5/16
27/64 0.4219 2 3 3/8
7/16 0.4375 2 1/16 3 7/16
29/64 0.4531 2 1/8 3 9/16
15/32 0.4688 2 1/8 3 5/8
31/64 0.4844 2 3/16 3 11/16
1/2 0.5000 2 1/4 3 3/4
  1. All dimensions are in inches.

Drill Feeds & Speeds

Material Hardness Drill Type Point Style Point
Angle
Speed
(SFM)
Feed Coolant
Aluminum / Aluminum Alloys - High Helix Standard 118° 200-300 Medium to Heavy Water Soluble
Aluminum Bronze - High Helix Standard 118° 50-100 Medium to Heavy Water Soluble
Brass, Free Machining - Low Helix Standard 118° 100-250 Medium to Heavy Water Soluble
Bronze, Soft Medium Below 200 General Purpose Standard 118° 70-150 Medium to Heavy Water Soluble
Bronze, High Tensile - Low Helix or Half RD Standard 118° 50-100 Medium to Heavy Water Soluble
Copper / Copper Alloys - General Purpose Standard 118° 100-200 Medium Water Soluble
High Temp Alloys, Cobalt Base 180-300 Cobalt Split Point 135° 5-20 Medium Activated Oils
High Temp Alloys, Iron Base 180-300 Cobalt Split Point 135° 5-20 Medium Activated Oils
High Temp Alloys, Nickel Base 180-300 Nitro® or Cobalt Split Point 135° 5-15 Medium Activated Oils
Iron, Soft Case Up to 150 Heavy Duty or Nitro® Split Point 135° 75-150 Medium Dry / Air
Iron, Medium Case 150-250 Heavy Duty or Nitro® Split Point 135° 50-100 Medium Dry / Air
Iron, Hard Case Over 250 Carbide Standard 118° 40-75 Light to Medium Dry / Air
Plastic & Related Materials - Low Helix Low Angle 90° 100-200 Medium to Heavy Dry / Air
Steel, Low Carbon Alloy 125-275 General Purpose Standard 118° 50-70 Medium Water Soluble
Steel, Medium Carbon Alloy 275-325 Heavy Duty or Nitro® Split Point 135° 40-55 Medium Water Soluble
Steel, High Carbon Alloy Over 325 Cobalt Split Point 135° 30-50 Medium Water Soluble
Steel, Low & Medium Carbon Alloy Below 175 General Purpose Standard 118° 45-95 Medium to Heavy Water Soluble
Steel, High Carbon Alloy 175-225 General Purpose Standard 118° 45-65 Medium Water Soluble
Stainless Steel, Austenitic Below 300 Heavy Duty or Nitro® Split Point 135° 40-60 Medium to Heavy Water Soluble
Stainless Steel, Precipitation Over 300 Cobalt Split Point 135° 20-40 Medium Cutting Oil
  1. Feeds – Feed rates for drilling are governed by the drill diameter, machinability of materials and depth of hole.
  2. Speeds – The speed of a drill is determined by the rate which the outer periphery of the tool rotates in relation to material being cut. In general, the SFM at which a drill will operate is within a range based upon the workpiece material, its condition, hardness and depth of hole. It is usually advisable to start the drilling process at a slower SFM and then increase to the maximum.
  3. RPM = (SFM x 3.82) divided by TD = Revolutions Per Minute
  4. SFM = RPM x TD x .262 = Surface Feet Per Minute
  5. TD – Tool diameter in inches
Nitro Stubby Drill Bit
View
Size Bit Decimal Overall Length Shank Type Item # Availability Price Quantity UOM
1/16 0.0625 1 5/8 Straight DRIL1/16S In Stock $1.32084/EA EA
5/64 0.0781 1 11/16 Straight DRIL5/64S In Stock $1.48215/EA EA
3/32 0.0938 1 3/4 Straight DRIL3/32S In Stock $1.42166/EA EA
7/64 0.1094 1 13/16 Straight DRIL7/64S In Stock $1.46703/EA EA
1/8 0.1250 1 7/8 Straight DRIL1/8S In Stock $1.96612/EA EA
5/32 0.1563 2 1/16 Straight DRIL5/32S In Stock $2.03908/EA EA
11/64 0.1719 2 1/8 Straight DRIL11/64S In Stock $1.78463/EA EA
3/16 0.1875 2 3/16 Straight DRIL3/16S In Stock $2.85445/EA EA
13/64 0.2031 2 1/4 Straight DRIL13/64S In Stock $2.66075/EA EA
7/32 0.2188 2 3/8 Straight DRIL7/32S In Stock $3.06749/EA EA
15/64 0.2344 2 7/16 Straight DRIL15/64S In Stock $2.72225/EA EA
1/4 0.25 2 1/2 Straight DRIL1/4S In Stock $3.27504/EA EA
17/64 0.2656 2 5/8 Straight DRIL17/64S In Stock $4.22234/EA EA
9/32 0.2813 2 11/16 Straight DRIL9/32S In Stock $3.69387/EA EA
19/64 0.2969 2 3/4 Straight DRIL19/64S In Stock $4.77289/EA EA
21/64 0.3281 2 15/16 Straight DRIL21/64S In Stock $5.54425/EA EA
11/32 0.3438 3 Straight DRIL11/32S In Stock $5.5491/EA EA
23/64 0.3594 3 1/16 Straight DRIL23/64S In Stock $6.57846/EA EA
3/8 0.3750 3 1/8 Straight DRIL3/8S In Stock $7.47666/EA EA
25/64 0.3906 3 1/4 Straight DRIL25/64S In Stock $7.35642/EA EA
13/32 0.4063 3 5/16 Straight DRIL13/32S In Stock $9.97559/EA EA
27/64 0.4219 3 3/8 Straight DRIL27/64S In Stock $8.67117/EA EA
7/16 0.4375 3 7/16 Straight DRIL7/16S In Stock $11.01258/EA EA
29/64 0.4531 3 9/16 Straight DRIL29/64S In Stock $10.21396/EA EA
15/32 0.4688 3 5/8 Straight DRIL15/32S In Stock $9.93806/EA EA
31/64 0.4844 3 11/16 Straight DRIL31/64S In Stock $10.50113/EA EA
1/2 0.5 3 3/4 Straight DRIL1/2S In Stock $13.56982/EA EA