4pcs HSS Countersink Chamfering Drill Bit Set for Wood, Iron, Aluminum

4pcs HSS Countersink Chamfering Drill Bit Set for Wood, Iron, Aluminum, 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

4pcs HSS Countersink Chamfering Drill Bit Set for Wood, Iron, Aluminum Specifications
Material:4241 High Speed Steels
Surface:Titanium coated.
Shank:6/8/10/12mm.
Head diameter:10/14/21/28mm.
Cut hole size:2-5,5-10,10-15,15-20mm.
NOTE:
When edge processing need to add water or cold oil, responsible for the drill will burn.
Please allow 1-2mm differs due to manual measurement.
Used for workpiece circular aperture chamfering or cone hole, the edges on the surface of the chamfering processing.
Package Include:
4 x Countersink and Deburring Tool
Designed for general purpose countersinking, chamfering or deburring.

How To Countersink Screws In Metal
1. Wear appropriate safety equipment, such as goggles and gloves.

Wearing safety glasses or goggles can protect your eyes from flying chips, debris, and other eye-threatening hazards. Gloves prevent your hands from being cut by sharp components, chips, or sharp edges that are produced during the drilling process

2. Make sure you have the right countersink angle

To ensure the screw can be secured correctly, you need to make sure that you have the right countersink angle. For example, a 90-degree countersink is used with metric screws, while an 82-degree countersink is used with standard screws.

3. Choose the right-sized countersink drill bit.

The diameter of your drill bit is critical because it will determine how well the screw will fit into the hole when you are finished drilling it. Make sure that the diameter of the drill bit is approximately the same size as the head of the screw or bolt you intend to use. This will ensure that the screwhead is snugly fitted into the countersink hole. As a result, screwheads will not protrude above the surface of the metal. 0 Flute 90° HSS CO Slanting Hole Countersink Bits

4. Insert the countersink bit into the drill press’ chuck and tighten firmly.

When a drill bit is spinning, it is held in place by a drill chuck. It has a three-way vice and a tightening collar. Drill chucks can be tightened by hand or with a chuck key or chuck wrench, depending on their design.

Using a key that is designed to fit into an open hole on the chuck, you can tighten the collar. The bit shaft should be secured in the vise’s collar by rotating the collar. Make sure it isn’t too tight so that you can still easily remove it once you are done drilling. 0 Flute 90° Chamfering HSS Slanting Hole Countersink Drill Bits

5. Set The Drill To the Correct Depth

You want to make sure the screwhead is flush with the metal. Make that the depth stop adjuster is set to at least 4 mm or more, depending on the size of the screw or bolt head. This will allow you to precisely drill your hole. This will prevent the screw head from protruding or countersinking excessively, hence preventing a gap from forming on top of the screw head.

6. Secure the Metal Your Drilling

To avoid any movement during drilling, make sure the metal is completely secured. Keep the metal sheet in place during drilling by putting clamps on its sides. Movements can cause the hole to become out of alignment, which will degrade its quality. 90 Degree 0 Flute HSS Slanting Hole Countersink Deburring Drill Bit

7. Use Appropriate Drill Speed

Start drilling with moderate speed and pressure. This will keep your drill bit cool and avoid premature dulling. Apply lubricants once in a while. It is recommended to apply drilling lubricants on a regular basis. Turn off your drill as soon as you’ve achieved the desired depth.

8. Inspect Your Countersink Hole

Remove the drill bit and check if the countersunk screw or bolt is flush with the countersink hole. The head should fit snugly on the hole and it should then be placed slightly below the surface of the metal.  90 Degree Deburring Chamfering Hole M35 Cobalt Countersink Drill Bit Set

 

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