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. 188-7137
Mfr. Part No.D-09868
BrandMakita
HK$87.15
Each
units
12mm Jobber - HSS 151 mm
RS Stock No. 188-7138
Mfr. Part No.P-23818
BrandMakita
HK$228.80
1 Set
Set(s)
3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm Drill Bit Set - HSS -
RS Stock No. 188-7143
Mfr. Part No.P-51873
BrandMakita
HK$251.68
1 Set
Set(s)
1.5 10mm Drill Bit Set - - 40 130 mm
New
RS Stock No. 194-7858
Mfr. Part No.B-57467
BrandMakita
HK$43.47
Each
units
6mm Drill Bit Metal HSS-TiN 123 mm
New
RS Stock No. 194-7852
Mfr. Part No.B-57401
BrandMakita
HK$26.08
Each
units
3mm Drill Bit Metal HSS-TiN 90 mm
New
RS Stock No. 194-7860
Mfr. Part No.B-57473
BrandMakita
HK$48.96
Each
units
6.5mm Drill Bit Metal HSS-TiN 131 mm
New
RS Stock No. 194-7855
Mfr. Part No.B-57439
BrandMakita
HK$32.60
Each
units
4.5mm Drill Bit Metal HSS-TiN 110 mm
New
RS Stock No. 194-7853
Mfr. Part No.B-57417
BrandMakita
HK$28.26
Each
units
3.5mm Drill Bit Metal HSS-TiN 100 mm
RS Stock No. 188-7134
Mfr. Part No.D-09721
BrandMakita
HK$18.83
Each
units
5mm Jobber - HSS 86 mm
RS Stock No. 188-7136
Mfr. Part No.D-09824
BrandMakita
HK$57.69
Each
units
10mm Jobber - HSS 133 mm
New
RS Stock No. 194-7857
Mfr. Part No.B-57451
BrandMakita
HK$42.44
Each
units
5.5mm Drill Bit Metal HSS-TiN 123 mm
New
RS Stock No. 194-7854
Mfr. Part No.B-57423
BrandMakita
HK$31.57
Each
units
4mm Drill Bit Metal HSS-TiN 105 mm
RS Stock No. 188-7135
Mfr. Part No.D-09787
BrandMakita
HK$34.88
Each
units
8mm Jobber - HSS 117 mm
New
RS Stock No. 194-7856
Mfr. Part No.B-57445
BrandMakita
HK$39.12
Each
units
5mm Drill Bit Metal HSS-TiN 116 mm
RS Stock No. 188-7132
Mfr. Part No.D-06410
BrandMakita
HK$177.32
Each
units
6mm Jobber - HSS 93 mm