Wooden Box Packing Black Oxide DIN345 HSS 4241 Taper Shank Twist Drill Bits Set

Wooden Box Packing Black Oxide DIN345 HSS 4241 Taper Shank Twist Drill Bits Set, DIN345 High Speed Steel Morse Taper Conical Shank Drill Bit Black Nitride, HSS M2 Morse Taper Shank Twist Drilling Bit DIN345, DIN1870 HSS Morse Taper Shank Twist Extra Long Drill Bit for Metal, Rolled & Polished, Roll Forged, Fully Ground, Reduced Shank, Milled Types HSS Straight Shank Twist Drill Bits China Supplier Factory

Wooden Box Packing Black Oxide DIN345 HSS 4241 Taper Shank Twist Drill Bits Set  Technical Specifications
HSS drill set 9 pieces.
Ideally suited for steel or cast steel, drills with Morse taper attachment MK2 or MK3 holder
Drills were made from HSS high speed steel, packaged in a wooden storage case
Borher length: MK2: 14.5, 16, 18, 20, 22 mm MK3: 24, 26, 28, 30mm

Components of HSS Twist Drill Bits

Pointed tip (drill point)
At the forefront of the twist drill bit is the pointed tip, often referred to as the drill point or chisel edge. This pointed tip initiates the cutting process by creating a small indentation in the material’s surface. The shape and angle of the drill point vary based on the type of material being drilled. For example, metal drill points tend to have a steeper angle than those used for wood to ensure effective cutting.

Flutes and helix angle
The body of the twist drill bit features helical flutes, which are spiral-shaped grooves that run along the length of the bit.

Cutting edges
The intersection between the flutes and the bit’s body forms the cutting edges. These edges slice through the material as the bit rotates, removing material to create the hole.The angle at which the flutes spiral along the bit’s length is called the helix angle. This angle determines the efficiency of chip evacuation and affects the stability of the drilling process. M2 High Speed Steel Morse Taper Shank DIN345 Drill Bit

Web (core)
The central part of the twist drill bit that runs between the flutes is known as the web or core. The web provides structural support to the cutting edges and helps maintain the bit’s stability during drilling. The thickness of the web varies, and its design impacts factors like the bit’s strength, rigidity, and ability to cut efficiently.

Shank
The shank is the non-cutting end of the twist drill bit that is inserted into the drill chuck. The shank can have various shapes, such as cylindrical or hexagonal, depending on the type of drill and chuck it’s designed to fit. HSS M2 Morse Taper Shank Twist Drilling Bit DIN345

HSS Twist Drill Bits
Manufacturing	Surface Finish						Sharpening
	White	Black	Black&White	TIN Coated	Amber	Black&Gold	118°	135°
Roll Forged		√	√				√	√
Rolled Polished	√	√	√	√	√		√	√
Fully Ground	√	√	√	√	√	√	√	√
Milled	√	√	√	√		√	√
Standards	DIN338, DIN340, DIN1897, DIN1869, DIN345, DIN341
	Jobber Length, Taper Length, Screw Machine Length, Aircraft Extension, Taper Shank(ANSI)
Material	HSS4241, HSS4341, HSS9341, HSS6542(M2), HSS CO5%(M35), HSS CO8%(M42)
Shank	Straight Shank, Taper Shank, Three Flats Shank, Hexagonal Shank, 1/2″  3/8″ Reduced Shank
Helix Angle	Type N, Type W, Type H
Rotating	Right Hand, Left Hand
Flute	Normal Parabolic

 

Diameter	Overall length	Flute length	Diameter	Overall length	Flute length
mm	mm	mm	inch	inch	inch
0.5	22	6	3/64″	1-3/4″	3/4″
1.0	34	12.0	1/16″	1-7/8″	7/8″
1.5	43	20.0	5/64″	2″	1″
2	49	24.0	3/32″	2-1/4″	1-1/8″
2.5	57	30.0	7/64″	2-5/8″	1-1/2″
3.0	61	33.0	1/8″	2-3/4″	1-5/8″
3.2	65	36.0	9/64″	2-7/8″	1-3/4″
3.5	70	39.0	5/32″	3-1/8″	2″
4.0	75	46.0	11/64″	3-1/4″	2-1/8″
4.2	75	46.0	3/16″	3-1/2″	2-5/16″
4.5	80	47.0	13/64″	3-5/8″	2-7/76″
4.8	86	52.0	7/32″	3-3/4″	2-1/2″
5.0	86	52.0	15/64″	3-7/8″	2-5/8″
5.2	86	52.0	1/4″	4″	2-3/4″
5.5	93	57.0	17/67″	4-1/8″	2-7/8″
6.0	93	57.0	9/32″	4-1/4″	2-15/16″
6.5	101	63.0	19/64″	4-3/8″	3-1/16″
7.0	109	69.0	5/16″	4-1/2″	3-3/16″
7.5	109	69.0	21/64″	4-5/8″	3-5/16″
8.0	117	75.0	11/31″	4-3/4″	3-7/16″
8.5	117	75.0	23/64″	4-7/8″	3-1/2″
9.0	125	81.0	3/8″	5″	3-5/8″
9.5	125	81.0	25/64″	5-1/8″	3-3/4″
10.0	133	87.0	13/32″	5-1/4″	3-7/8″
10.5	133	87.0	27/64″	5-3/8″	3-15/16″
11.0	142	94.0	7/16″	5-1/2″	4-1/16″
11.5	142	94.0	29/64″	5-5/8″	4-3/16″
12.0	151	101	15/32″	5-3/4″	4-5/16″
12.5	151	101	31/64″	5-7/8″	4-3/8″
13.0	151	101	17/32″	6-5/8″	4-13/16″
13.5	160	108	35/64″	6-5/8″	4-13/16″
14.0	160	108	9/64″	6-5/8″	4-13/16″
14.5	169	114	37/64″	6-5/8″	4-13/16″
15.0	169	114	19/32″	7-1/8″	5-13/16″
15.5	178	120	39/64″	7-1/8″	5-13/16″
16.0	178	120	5/8″	7-1/8″	5-13/16″
16.5	184	125	41/64″	7-1/8″	5-13/16″
17.0	184	125	21/32″	7-1/8″	5-13/16″
17.5	191	130	43/64″	7-5/8″	5-5/8″
18.0	191	130	11/16″	7-5/8″	5-5/8″
18.5	198	135
19.0	198	135
19.5	205	140
20.0	205	140