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 Material Overall Length
RS Stock No. 769-0329
Mfr. Part No.2608585506
BrandBosch
$69.55
1 Pack of 10
Pack(s)
7.8mm Twist Drill HSS 117 mm
RS Stock No. 768-3172
Mfr. Part No.2608585889
BrandBosch
$10.225
Each (In a Pack of 10)
units
6mm Twist Drill HSS 93 mm
RS Stock No. 768-3245
Mfr. Part No.2608595060
BrandBosch
$4.049
Each (In a Pack of 10)
units
4.2mm Twist Drill HSS 75 mm
RS Stock No. 768-3100
Mfr. Part No.2608585524
BrandBosch
$18.178
Each (In a Pack of 5)
units
10.3mm Twist Drill HSS 133 mm
RS Stock No. 768-3116
Mfr. Part No.2608585528
BrandBosch
$22.664
Each (In a Pack of 5)
units
10.8mm Twist Drill HSS 142 mm
RS Stock No. 759-5750
Mfr. Part No.2608596681
BrandBosch
$14.97
Each
units
3mm Self Centring HSS 61 mm
RS Stock No. 768-3132
Mfr. Part No.2608585861
BrandBosch
$56.59
Each
units
8mm Twist Drill HSS 117 mm
RS Stock No. 768-3075
Mfr. Part No.2608585515
BrandBosch
$15.542
Each (In a Pack of 5)
units
9.1mm Twist Drill HSS 125 mm
RS Stock No. 788-3758
Mfr. Part No.2608595506
BrandBosch
$17.41
Each
units
6mm Multiconstruction Carbide 250 mm
RS Stock No. 768-3201
Mfr. Part No.2608585901
BrandBosch
$37.786
Each (In a Pack of 5)
units
11mm Twist Drill HSS 142 mm
RS Stock No. 788-3742
Mfr. Part No.2608596051
BrandBosch
$7.35
Each
units
5mm Multiconstruction Carbide 85 mm
RS Stock No. 768-2952
Mfr. Part No.2608585446
BrandBosch
$4.653
Each (In a Pack of 10)
units
7/32in Twist Drill HSS 93 mm
RS Stock No. 768-3258
Mfr. Part No.2608595062
BrandBosch
$4.604
Each (In a Pack of 10)
units
5mm Twist Drill HSS 86 mm
RS Stock No. 769-0316
Mfr. Part No.2608585499
BrandBosch
$53.98
1 Pack of 10
Pack(s)
6.6mm Twist Drill HSS 101 mm
RS Stock No. 768-3138
Mfr. Part No.2608585842
BrandBosch
$6.78
Each
units
3mm Twist Drill HSS 61 mm
RS Stock No. 768-3239
Mfr. Part No.2608595057
BrandBosch
$3.222
Each (In a Pack of 10)
units
3.3mm Twist Drill HSS 65 mm
RS Stock No. 768-3277
Mfr. Part No.2608595070
BrandBosch
$7.955
Each (In a Pack of 10)
units
7mm Twist Drill HSS 109 mm
RS Stock No. 768-3031
Mfr. Part No.2608585493
BrandBosch
$5.334
Each (In a Pack of 10)
units
5.4mm Twist Drill HSS 93 mm
RS Stock No. 768-3191
Mfr. Part No.2608585894
BrandBosch
$20.534
Each (In a Pack of 5)
units
8mm Twist Drill HSS 117 mm
RS Stock No. 768-3264
Mfr. Part No.2608595065
BrandBosch
$5.983
Each (In a Pack of 10)
units
5.8mm Twist Drill HSS 93 mm