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
RS Stock No. 794-7622
Mfr. Part No.A7776.8
BrandDormer
$160.86
1 Box of 10
Box(es)
6.8mm Jobber - HSS-E 109 mm
RS Stock No. 667-3519
Mfr. Part No.R4585.5
BrandDormer
$73.06
Each
units
5.5mm Short - Solid Carbide 66 mm
RS Stock No. 794-7511
Mfr. Part No.A1083.5
BrandDormer
$58.46
1 Box of 10
Box(es)
3.5mm Jobber Multi-Material HSS 70 mm
RS Stock No. 545-884
Mfr. Part No.A100 2.6
BrandDormer
$3.562
Each (In a Pack of 5)
units
2.6mm Jobber Multi-Material HSS 57 mm
RS Stock No. 707-2780
Mfr. Part No.DT4904-QZ
BrandDeWALT
$12.30
Each
units
4mm - - HSCo 75 mm
RS Stock No. 343-1479
Mfr. Part No.R100 7.0MM
BrandDormer
$100.74
Each
units
7mm Jobber - Solid Carbide 109 mm
RS Stock No. 768-2999
Mfr. Part No.2608585462
BrandBosch
$23.592
Each (In a Pack of 5)
units
15/32in Twist Drill - HSS 151 mm
RS Stock No. 728-7443
Mfr. Part No.R4546.0
BrandDormer
$93.91
Each
units
6mm Long - Solid Carbide 82 mm
RS Stock No. 768-2924
Mfr. Part No.2608585437
BrandBosch
$3.346
Each (In a Pack of 10)
units
5/64in Twist Drill - HSS 49 mm
RS Stock No. 299-7861
Mfr. Part No.A170-17,00
BrandDormer
$94.33
Each
units
17mm - - HSS 157 mm
RS Stock No. 828-0285
Mfr. Part No.A002S5.0
BrandDormer
$4.95
Each (In a Pack of 2)
units
5mm Jobber - HSS-TiN 86 mm
RS Stock No. 695-0614
Mfr. Part No.A9203.5
BrandDormer
$7.85
Each
units
3.5mm Short - HSCo 52 mm
RS Stock No. 794-7331
Mfr. Part No.A0025.9
BrandDormer
$23.00
1 Box of 5
Box(es)
5.9mm Jobber Multi-Material HSS-TiN 93 mm
RS Stock No. 424-4131
Mfr. Part No.DT5057-QZ
BrandDeWALT
$11.56
Each
units
10.5mm - - HSS-R 133 mm
RS Stock No. 695-6704
Mfr. Part No.A92012.0
BrandDormer
$58.46
Each
units
12mm Short - HSCo 102 mm
RS Stock No. 813-0055
Mfr. Part No.A002S9.5
BrandDormer
$15.10
Each
units
9.5mm Jobber - HSS-TiN 125 mm
RS Stock No. 768-3179
Mfr. Part No.2608585888
BrandBosch
$8.684
Each (In a Pack of 10)
units
5.5mm Twist Drill - HSS 93 mm
RS Stock No. 768-3113
Mfr. Part No.2608585526
BrandBosch
$20.604
Each (In a Pack of 5)
units
10.6mm Jobber - HSS-G 133 mm
RS Stock No. 794-7600
Mfr. Part No.A7774.2
BrandDormer
$76.44
1 Box of 10
Box(es)
4.2mm Jobber - HSS-E 75 mm
RS Stock No. 695-0563
Mfr. Part No.A90011.0
BrandDormer
$70.01
Each
units
11mm Jobber - HSCo 142 mm
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