Blacksmith Drill Bits

Blacksmith Drill Bits are a type of Twist Drill that is rolled and typically has a reduced shank. These high-performance drill pieces can pierce through tough materials like Cast Iron.

Drill Bit Shape and Structure

A unique feature to the Blacksmith Drill Bit is the Reduced Shank. This means that the Drill Bits have a smaller diameter of a shank over the cutting head of the drill bit. Thus, allowing for a larger hole to be created whilst still being compatible with standard sizes of drill chucks on handheld drills. This DIN 338 Drill Piece has an 118° Point Angle with a Shape N Tip Grind allowing for a drilling depth of 5 times the standard diameter. The Shape Type N means that the Blacksmith Drill Bits have a Helical Point Cut with a normal ground twist structure giving a strong deep cut.

Drill Bit Craft and Material

The Blacksmith Twist Drill Bit has a more robust coating and structure compared to other Jobber Twist Drill Bits. The manufacturing procedure (with no structural disruption) solidifies the material making it more elasticated. This makes it more resistant to fracture and suitable for robust drilling units (e.g. hand-held drilling machines). Ideally suitable for drilling larger drilling diameters on all commonly used drill machines with a clamping chuck up to 13.0 mm. These drill bits are typically steam treated and have a black surface coating treatment which allows for a more robust tool piece against corrosion and a much stronger quality finish.

Blacksmith Drill Bit Tolerance and Capability

A typical Blacksmith Jobber Twist Drill Piece can withstand a clamping chuck of up to 13mm or ½ inch. Due to the Reduced Shank (where the shank has a smaller diameter over the cutting head of the drill bit), they can drill much larger holes within a material whilst also remaining compatible with standard sizes of drill chucks on handheld drills. The high strength and performance of the drill piece makes it ideal for drilling through hard materials such as Cast Iron and Bronze. Most Blacksmith Drills can handle Steel < 900 N/mm², as well as Aluminium, Brass and Plastics. Due to the shape and shank structure, Blacksmith Bits can drill up to 5 x the depth of a typical twist drill bit and the standard diameter

Drill Bit Comparison

The table diagram below shows the specifications between other typical HSS Jobber Twist Drill Bits:

	Blacksmith (HSS-R) Reduced Shank	Twist Drill (HSS-G)	Twist Drill (HSS-G) with TIN Coating	Twist Drill (HSSE-C05) contains 5% Cobalt	Twist Drill (HSS-R)
Image
Surface Coating	Black Surface	No Coating (Silver)	TiN Coating	Bronzed Surface	Black Surface
Shaft Shape	Reduced Shank	Cylindrical	Cylindrical	Cylindrical	Cylindrical
Material	High Speed Steel (HSS)	High Speed Steel (HSS)	High Speed Steel (HSS)	High Speed Steel with 5% Cobalt (HSSE-CO 5)	High Speed Steel (HSS)
*DIN	338	338	338	338	338
Type	N	N	TL 3000	VA	N
*Point Angle	118°	118°	130°	130°	118°
*Spiral Angle	25° - 30°	20° - 30°	40°	36°	25° - 30°
Drilling Depth	5 x Diameter	5 x Diameter	5 x Diameter	5 x Diameter	5 x Diameter
Tolerance	h8	h8	h8	h8	h8
Groove Profile	Normal	Normal	Wide with Rounded Rear Edges	Thickened	Normal
Core	Normal	Normal	Thick	Thickened	Normal
*Cutting Direction	Right Hand Cutting	Right Hand Cutting	Right Hand Cutting	Right Hand Cutting	Right Hand Cutting
*Tip Grinding	Shape N: Helical point normal ground	Shape C: Split point	Shape C: Split point	Shape C: Split point	Shape N: Helical point normal ground
*Typical Estimated NET Weight (kg)	0.18 kg	0.022 kg	0.024 kg	0.025 kg	0.024 kg
*Applications	Heavy Duty: Steel < 900 N/mm², Aluminium, Brass, Plastics, Bronze, Cast Iron	Lighter Uses: Steel < 900 N/mm², Aluminium, Brass, Plastics, Light Use on metals such as Bronze and Cast Iron	Steel < 1100 N/mm², Stainless Steel, Aluminium, Brass, Plastics, Light Use on metals such as Bronze and Cast Iron	Steel < 1100 N/mm², Stainless Steel, Aluminium, Brass, Plastics, Light Use on metals such as Bronze and Cast Iron	Steel < 900 N/mm², Aluminium, Brass, Plastics, Light Use on metals such as Bronze and Cast Iron