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. 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. 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. 768-3116
Mfr. Part No.2608585528
BrandBosch
$22.87
Each (In a Pack of 5)
units
10.8mm Jobber - HSS-G 142 mm
RS Stock No. 768-3100
Mfr. Part No.2608585524
BrandBosch
$18.344
Each (In a Pack of 5)
units
10.3mm Jobber - HSS-G 133 mm
RS Stock No. 768-3245
Mfr. Part No.2608595060
BrandBosch
$4.086
Each (In a Pack of 10)
units
4.2mm Jobber - HSS-G 75 mm
RS Stock No. 759-5750
Mfr. Part No.2608596681
BrandBosch
$15.11
Each
units
3mm Self Centring - HSS 61 mm
RS Stock No. 768-3132
Mfr. Part No.2608585861
BrandBosch
$57.11
Each
units
8mm Twist Drill - HSS 117 mm
RS Stock No. 768-3306
Mfr. Part No.2608595081
BrandBosch
$26.072
Each (In a Pack of 5)
units
12mm Jobber - HSS-G 151 mm
RS Stock No. 768-3227
Mfr. Part No.2608595055
BrandBosch
$2.785
Each (In a Pack of 10)
units
3mm Twist Drill - HSS-G 61 mm
RS Stock No. 768-3012
Mfr. Part No.2608585484
BrandBosch
$3.303
Each (In a Pack of 10)
units
3.8mm Jobber - HSS-G 75 mm
RS Stock No. 768-3062
Mfr. Part No.2608585508
BrandBosch
$12.34
Each (In a Pack of 5)
units
8.1mm Jobber - HSS-G 117 mm
RS Stock No. 768-3233
Mfr. Part No.2608595058
BrandBosch
$3.251
Each (In a Pack of 10)
units
3.5mm Jobber - HSS-G 70 mm
RS Stock No. 768-3090
Mfr. Part No.2608585520
BrandBosch
$16.768
Each (In a Pack of 5)
units
9.7mm Jobber - HSS-G 133 mm
RS Stock No. 768-3015
Mfr. Part No.2608585485
BrandBosch
$3.303
Each (In a Pack of 10)
units
3.9mm Jobber - HSS-G 75 mm
RS Stock No. 768-3065
Mfr. Part No.2608585509
BrandBosch
$12.34
Each (In a Pack of 5)
units
8.2mm Jobber - HSS-G 117 mm
RS Stock No. 768-3286
Mfr. Part No.2608595071
BrandBosch
$8.278
Each (In a Pack of 10)
units
7.5mm Jobber - HSS-G 109 mm
RS Stock No. 768-3309
Mfr. Part No.2608595079
BrandBosch
$23.424
Each (In a Pack of 5)
units
11mm Jobber - HSS-G 142 mm
RS Stock No. 768-2952
Mfr. Part No.2608585446
BrandBosch
$5.188
Each (In a Pack of 10)
units
7/32in Twist Drill - HSS 93 mm
RS Stock No. 768-3154
Mfr. Part No.2608585880
BrandBosch
$6.25
Each (In a Pack of 10)
units
4mm Twist Drill - HSS 75 mm
RS Stock No. 768-3093
Mfr. Part No.2608585521
BrandBosch
$18.046
Each (In a Pack of 5)
units
9.9mm Jobber - HSS-G 133 mm