6 Pieces Three Flute 90 Degree Round Shank HSS Countersunk Drill Bits Set

6 Pieces Three Flute 90 Degree Round Shank HSS Countersunk Drill Bits Set, Chamfer Countersink Deburring Drill Bits Set Cutting Metal Tool, M42 M35 HSS Countersink Drill Bits 90 Degree, Countersink HSS Drill Bits, Carbide Tipped Countersink Drill Bits Set, Single Flute & Deburring High-speed steel construction with titanium-coated finish for durable, smooth cutting, Woodworking Metalworking & Multipurpose Drill Bits China Supplier Factory Manufacturer

6 Pieces Three Flute 90 Degree Round Shank HSS Countersunk Drill Bits Set  Specifications
Material HSS M42(8% Cobalt) / M35 (5% Cobalt) / M2 / W4
Shank Round Shank ,Quick Change Hex Shank, Three-Flat Shank, Double R Hex Shank, Tapcon Shank, Flexible Shank, Extra Long Shank are
available.
Surface Finish Sand Blasted , Zinc Plated, Nickel Plated, Chrome Plated, Copper Plated, Black & Bright ,
Black Oxide are available, Ni/Zin/Cr/Cu/Tin coated.
Process Fully Ground / Milled / Roll Forged
Sharpening 45 60 90 135 Degree Point ect
Package PVC bag(single sleeve). plastic tube, plastic box(5/10pcs), PVC(5/10pcs)

A countersink is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. 3 Flutes Countersink Drills Bit Set 6Pcs For Chamfering Deburring

A common use is to allow the head of a countersunk bolt or screw, when placed in the hole, to sit flush with or below the surface of the surrounding material (by comparison, a counterbore makes a flat-bottomed hole that might be used with a socket-head screw).

A countersink may also be used to remove the burr left from a drilling or tapping operation thereby improving the finish of the product and removing any hazardous sharp edges. 90 Degree Countersink Head Deburring Drill Bit 4PCS External Chamfer Tool

Fast Chip Removal: This countersunk head deburring drill is made of 90° high-speed steel and adopts a through groove to remove chips, which can quickly remove chips and prevent blockage of the workpiece.
Applicable Pores: Our deburring tools are suitable for 2 ~ 5mm, 5 ~ 10mm, 10 ~ 15mm, 15 ~ 20mm. A sharp and precise countersink can be realized.
Eliminate chatter and vibration – all tips are angled at 90° for sharp and precise countersinks. The cutting edge is hardened and polished to improve sharpness. Chatter-free three-cutting edge design, with staggered cutting teeth to ensure free chip flow and fast chatter-free cutting. 4Pcs Cylindrical Shank 90 Degree 0 Flute HSS Countersink Deburring Bit Set for Metal Drilling
The drill is made of high-speed steel and coated with super-hard titanium alloy, which is durable, high temperature resistant and can be used for a long time.

Features
1. Three-flute designed to reduce clogging, improve clearance and be chatter free
2.High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance.
3.Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications.
4.Round shanks allow use with a wide variety of toolholding systems.
5.Made from industrial grade High-Speed Steel for increased durability.
6.Ideal for wooden planks,fiberboard,particle board,plywood,plastic,alumiumn board ,pcb board and more

Standard Countersink Angle in Different Uses
There are several countersink angles, and they all have different uses. However, below are the most common countersink angles and their uses. 90° Angled 3 Flutes Countersink Drill Bit HSS For Wood Metal Chamfering

standard countersink angle

60° (Deburring)
The primary purpose of this countersink angle is to remove burrs or sharp edges from the screw area of a metal part. After deburring, the metal has smoother edges.

75° (Rivet Heads)
The rivet head angle is ideal for most rivet head types, including drive, flush, friction-lock, Oscar, self-piercing, structural steel, and solid rivets. AlTiN Single-edged Chamfer Countersink Drill Bit For Deburring Reaming Chamfering

82° and 90° (Countersunk Screw)
There are two angles for countersunk screws. However, the exact angle chosen is a function of the industry countersink screw standard. For instance, the US standard is 82°, while other countries and regions use 90° countersunk screws and the same angles.

120° (Countersinking Sheet Metal Rivets)
The type of rivets used for sheet metals are the thinner and blind Rivets, often requiring a countersinking angle of 120°. This angle requirement is due to their use in joining sheet metals.  0-flute Hex Shank Countersink Drills Set For Woodworking Hole Opener

 

Size	Range	Head Size	Overall Length	Shank Diameter
5#	2-5mm	10mm	45mm	6mm
10#	5-10mm	14mm	48mm	8mm
15#	10-15mm	21mm	65mm	10mm
20#	15-20mm	28mm	85mm	12mm
25#	20-25mm	35mm	102mm	15mm
30#	25-30mm	44mm	115mm	15mm
35#	30-35mm	48mm	127mm	15mm
40#	35-40mm	53mm	136mm	15mm
50#	40-50mm	60mm	166mm	20mm