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. 728-7251
Mfr. Part No.A1255.0X200
BrandDormer
$32.38
Each
units
5mm Long - HSS 200 mm
RS Stock No. 728-7223
Mfr. Part No.A1253.0X250
BrandDormer
$44.42
Each
units
3mm Long - HSS 250 mm
RS Stock No. 792-068
Mfr. Part No.A110-2MM
BrandDormer
$7.43
Each
units
2mm Long - HSS 85 mm
RS Stock No. 828-202
BrandRS PRO
$8.82
Each
units
3.3mm Hexagon - HSS -
RS Stock No. 769-0329
Mfr. Part No.2608585506
BrandBosch
$70.19
1 Pack of 10
Pack(s)
7.8mm Jobber - HSS-G 117 mm
RS Stock No. 694-431
BrandRS PRO
$32.11
Each
units
15mm Blacksmiths - HSS 150 mm
RS Stock No. 787-7267
BrandRS PRO
$3.78
1 Tube of 5
Tube(s)
3mm Short - HSS-TiN 46 mm
RS Stock No. 212-991
BrandRS PRO
$12.37
1 Box of 10
Box(es)
1mm Jobber - HSS 32.5 mm
RS Stock No. 806-454
Mfr. Part No.A100 2-2MM
BrandDormer
$3.69
Each (In a Pack of 5)
units
2.2mm Jobber Multi-Material HSS 53 mm
RS Stock No. 813-0064
Mfr. Part No.A002S10.0
BrandDormer
$20.55
Each
units
10mm Jobber - HSS-TiN 133 mm
RS Stock No. 386-8269
Mfr. Part No.A002 8.80MM
BrandDormer
$13.90
Each
units
8.8mm Jobber - HSS 125 mm
RS Stock No. 212-979
BrandRS PRO
$8.81
1 Box of 10
Box(es)
2mm Jobber - HSS 47.5 mm
RS Stock No. 212-963
BrandRS PRO
$21.83
1 Box of 10
Box(es)
3mm Jobber - HSS 59 mm
RS Stock No. 828-218
BrandRS PRO
$8.82
Each
units
4.2mm Hexagon - HSS -
RS Stock No. 408-8004
BrandRS PRO
$53.37
Each
units
20mm Blacksmiths - HSS 150 mm
RS Stock No. 768-3172
Mfr. Part No.2608585889
BrandBosch
$10.317
Each (In a Pack of 10)
units
6mm Twist Drill - HSS 93 mm
RS Stock No. 212-985
BrandRS PRO
$13.31
1 Box of 10
Box(es)
1.5mm Jobber - HSS 40.5 mm
RS Stock No. 707-2784
Mfr. Part No.DT4905-QZ
BrandDeWALT
$8.80
Each
units
4.5mm - - HSCo 80 mm
RS Stock No. 213-073
BrandRS PRO
$20.31
1 Box of 10
Box(es)
3.5mm Jobber - HSS 70 mm
RS Stock No. 728-7103
Mfr. Part No.A1203.0
BrandDormer
$3.13
Each
units
3mm Short - HSS 46 mm
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