Skip to main content

S&D Reduced Shank Drill Bit

Image asset. Press spacebar to set to main image.

Nitro S&D drill bits offer superior performance over conventional HSS drills. Their Nitride treated, heavy-duty construction increases tool life and performance. 118° 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. S&D drills expand the size range capacity of a 1/2" portable drill chuck.

Products

Dimensional Specifications

Size Decimal
Equivalent		 Flute
Length		 Overall
Length
33/64 0.5156 3 6
17/32 0.5313 3 6
35/64 0.5469 3 6
9/16 0.5625 3 6
37/64 0.5781 3 6
19/32 0.5938 3 6
39/64 0.6094 3 6
5/8 0.6250 3 6
41/64 0.6406 3 6
21/32 0.6563 3 6
43/64 0.6719 3 6
11/16 0.6875 3 6
45/64 0.7031 3 6
23/32 0.7188 3 6
47/64 0.7344 3 6
3/4 0.7500 3 6
49/64 0.7656 3 6
25/32 0.7813 3 6
51/64 0.7969 3 6
13/16 0.8125 3 6
53/64 0.8281 3 6
27/32 0.8438 3 6
55/64 0.8594 3 6
7/8 0.8750 3 6
57/64 0.8906 3 6
29/32 0.9063 3 6
59/64 0.9219 3 6
15/16 0.9375 3 6
61/64 0.9531 3 6
31/32 0.9688 3 6
63/64 0.9844 3 6
1 1.0000 3 6
  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