Twist Drill Bits

Twist drill bits are a hand tool accessories used for drilling material like masonry, wood and sheet metal to create holes. Twist Drill bits are used in conjunction with a power drill and are readily available in various shapes and sizes depending on the material being drilled.

Types of Twist Drill Bits

Jobber drill bit

Long drill bit

Short drill bit

Stub drill bit

Morse Taper drill bit

Self-centring drill bit

What material can they cut?

They can cut through many forms of material, its a question of having the correct drill bit, however typical materials include;

Wood

Plastics

Aluminium

Brass

Cast iron

Mild steel

How do they work?

Insert the drill bit into a corded or cordless power drill at the chuck, tighten until its held in place then select the required torque setting. Hold the power drill with both hands securely, apply some pressure then start drilling,

How do you know which type of Twist Drill Bits to use?

It is important to have the correct drill bit when cutting holes. When making a considered purchase there a few things you need to consider; the material being cut, the material & coating of the drill plus the geometry.

Drill point angle

There are 2 general types; 118 ° that drill mild steel aluminum and other soft metals or 135 ° that drills hard steel and tough materials.

What are their strengths?

HSS drill bits are basic, inexpensive and easy to re-sharpen

HSS drill bits with Cobalt are an improvement on HSS, offer greater resistance to heat and wear but is also easy to re-sharpen

Carbide drill bits are the most expensive, usually, give the best heat resistance and last the longest.

When should I sharpen my drill?

As a rule, if your holes are in tolerance and wear & chipping are below 0.5 mm its typically ok to keep using your drill, anything after that you need to consider replacing or sharpening.

Popular Coating

Bright finish

Black oxide

Titanium Nitride (TiN)

Titanium Carbon-Nitride (TiCN)

Titanium Aluminum Nitride (TiAIN)

Safety

Proper eye protection must be worn at all times

Only use drills bits made for power tools

Keep hands away from drills bits during application

Applications Information

Twist drill bits are used in Industrial construction, servicing & maintenance applications.


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Description Price Diameter Type Drilling Application Material Overall Length
RS Stock No. 707-2784
Mfr. Part No.DT4905-QZ
BrandDeWALT
$8.80
Each
units
4.5mm - - HSCo 80 mm
RS Stock No. 706-8684
Mfr. Part No.DT6515-QZ
BrandDeWALT
$8.54
Each
units
3mm Jobber - Carbide Tipped 113 mm
RS Stock No. 113-8628
Mfr. Part No.DT50019-QZ
BrandDeWALT
$36.27
Each
units
13mm Impact - Titanium 101.5 mm
RS Stock No. 113-8615
Mfr. Part No.DT50000-QZ
BrandDeWALT
$19.06
Each
units
3mm Impact - Titanium 65 mm
RS Stock No. 424-4119
Mfr. Part No.DT5056-QZ
BrandDeWALT
$27.06
Each
units
10mm - - HSS-R 133 mm
RS Stock No. 707-2706
Mfr. Part No.DT6519-QZ
BrandDeWALT
$13.35
Each
units
6mm Jobber - Carbide Tipped 123 mm
RS Stock No. 424-4131
Mfr. Part No.DT5057-QZ
BrandDeWALT
$16.11
Each
units
10.5mm - - HSS-R 133 mm
RS Stock No. 707-2778
Mfr. Part No.DT4902-QZ
BrandDeWALT
$11.66
Each
units
3mm - - HSCo 61 mm
RS Stock No. 707-2825
Mfr. Part No.DT4917-QZ
BrandDeWALT
$41.67
Each
units
13mm - - HSCo 151 mm
RS Stock No. 706-8696
Mfr. Part No.DT6517-QZ
BrandDeWALT
$5.39
Each
units
4mm Jobber - Carbide Tipped 103 mm
RS Stock No. 707-2780
Mfr. Part No.DT4904-QZ
BrandDeWALT
$13.65
Each
units
4mm - - HSCo 75 mm
RS Stock No. 424-3964
Mfr. Part No.DT5041-QZ
BrandDeWALT
$8.54
Each (In a Pack of 2)
units
3.5mm - - HSS-R 70 mm
RS Stock No. 424-4147
Mfr. Part No.DT5058-QZ
BrandDeWALT
$28.22
Each
units
11mm - - HSS-R 142 mm
RS Stock No. 706-8693
Mfr. Part No.DT6516-QZ
BrandDeWALT
$4.66
Each
units
3.5mm Jobber - Carbide Tipped 113 mm
RS Stock No. 424-4175
Mfr. Part No.DT5061-QZ
BrandDeWALT
$34.18
Each
units
12.5mm - - HSS-R 151 mm
RS Stock No. 424-4002
Mfr. Part No.DT5046-QZ
BrandDeWALT
$6.86
Each
units
5mm - - HSS-R 86 mm
RS Stock No. 707-2787
Mfr. Part No.DT4903-QZ
BrandDeWALT
$14.06
Each
units
3.5mm - - HSCo 70 mm
RS Stock No. 113-8616
Mfr. Part No.DT50002-QZ
BrandDeWALT
$19.11
Each
units
3.5mm Impact - Titanium 70 mm
RS Stock No. 424-3920
Mfr. Part No.DT5035-QZ
BrandDeWALT
$5.83
Each (In a Pack of 2)
units
1.5mm - - HSS-R 40 mm
RS Stock No. 707-2712
Mfr. Part No.DT6530-QZ
BrandDeWALT
$18.40
Each
units
6.5mm Jobber - Carbide Tipped 200 mm