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, it’s 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 it’s 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 it’s 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
New
RS Stock No. 188-7134
Mfr. Part No.D-09721
BrandMakita
SGD3.53
Each
units
5mm Jobber - HSS 86 mm
New
RS Stock No. 188-7132
Mfr. Part No.D-06410
BrandMakita
SGD31.84
Each
units
6mm Jobber - HSS 93 mm
New
RS Stock No. 188-7137
Mfr. Part No.D-09868
BrandMakita
SGD16.32
Each
units
12mm Jobber - HSS 151 mm
New
RS Stock No. 188-7135
Mfr. Part No.D-09787
BrandMakita
SGD6.53
Each
units
8mm Jobber - HSS 117 mm
New
RS Stock No. 188-7138
Mfr. Part No.P-23818
BrandMakita
SGD41.09
1 Set
Set(s)
3 mm, 4 mm, 5 mm, 6 mm, 8 mm, 10 mm Drill Bit Set - HSS -
New
RS Stock No. 188-7136
Mfr. Part No.D-09824
BrandMakita
SGD10.80
Each
units
10mm Jobber - HSS 133 mm
New
RS Stock No. 188-7143
Mfr. Part No.P-51873
BrandMakita
SGD45.20
1 Set
Set(s)
1.5 → 10mm Drill Bit Set - - 40 → 130 mm