Some tips of quick sharpening drill bit

Here’s some quick sharpening tips.

Keep the glasses on use the guard practice with your crappiest tools first. So when you get the hang of this when you nicer your better drill bits you got some skills. We’ll make this better as far as we can.

Sharpen the skills of the drill bit, how to repair and grind the drill bit, how to repair and grind the drill bit, how to repair and grind the top Angle of the drill bit, how to repair and grind the Leading Edge of the drill bit

Sharpen the skills of the drill bit, how to repair and grind the drill bit, how to repair and grind the drill bit, how to repair and grind the top Angle of the drill bit, how to repair and grind the Leading Edge of the drill bit

Here we are at bench grinder. What we’re going to do?  We’ve got a bad drill bit and you’ll notice the leading edge the top. Leading edge is what does all the work of a drill bit. When we hit bad material, it doesn’t remove material anymore. Eventually it’ll blew and ruin the drill bit if we want to take off some of the material on the back side.

 

Next we will going to show that I do to polish the front.

Sharpen the skills of the drill bit, how to repair and grind the drill bit, how to repair and grind the drill bit, how to repair and grind the top Angle of the drill bit, how to grind front of the drill bit, how to repair and grind the Leading Edge of the drill bit

Sharpen the skills of the drill bit, how to repair and grind the drill bit, how to repair and grind the drill bit, how to repair and grind the top Angle of the drill bit, how to grind front of the drill bit, how to repair and grind the Leading Edge of the drill bit

We’re gonna hold it just for a second or two like that in the Leading Edge. To clean this leading edge up the face and then we’re gonna grind on the backside of the bit slowly. Bringing the bit down until we see sparks hit the front. We’re gonna use all the side of the wheel.

When you’re doing this you look down and see where the center is and when you do one side. And you got your hands in position. You don’t look at it.

 

Then go back down and do it again. What happens as you lose your hand positioning so to do you look down this leading edge. And you watch the sparks. And you just touch it and you flip it over you don’t move your hands. See what that did is it gave me a clean Edge we can see my surface.

Sharpen the skills of the drill bit, how to repair and grind the drill bit, how to repair and grind the drill bit, how to repair and grind the top Angle of the drill bit, how to grind front of the drill bit, how to repair and grind the Leading Edge of the drill bit

Sharpen the skills of the drill bit, how to repair and grind the drill bit, how to repair and grind the drill bit, how to repair and grind the top Angle of the drill bit, how to grind front of the drill bit, how to repair and grind the Leading Edge of the drill bit

When we are going to sharpen now. We can see how grounded. We swallow they bring it down until we see some sparks coming off the front. The material going down now we don’t get to look at it. We go back off the back. We rotate it to do the other half. Then we start at the back. We go down they see well when we get near the tip. We push less and less hard.  So there is their cut. It’s going downhill. So the leading edge is the highest point.

 

It’s sharp as a razor right now. And both side look about the same decides. A little worse than the other. And we checked for center the other trick with. When we do the face of the grinding so wide. This is here we’re going to narrow that up a little bit. So when this goes on a piece of metal and it’s spinning. It’s not wandering all over the narrower that is better it stays on your mark. It doesn’t wonder as you’re trying to drill. So that just got narrower if you know what we are looking at you see. Its narrower now in the center as we get sharper. We’ve pushed less higher. So we actually have little too steep of a relief angle on this side.

These are some tips of quick sharpening drill bit. This method of grinding drill bits depends entirely on experience and feeling. We recommend our drill bit grinder products to you. It can finish drill grinding easily and correctly. Welcome to consult our products.

The purpose of grinding the major cutting edge of drill bit

The purpose of grinding is to change the edge shape or point angle to increase the front angle and control chip breaking. Or change the distribution of cutting load, increase the heat dissipation condition and improve the life of drill bit.

Three ways to sharpen the major cutting edge:

Three ways to sharpen the major cutting edge

Three ways to sharpen the major cutting edge

  1. Grinding the concave arc edge and strengthening the centering function of the drill are helpful for chip separation and chip breaking.
  2. Grinding out double or multiple point angles, or grinding out convex arc edges, can improve the heat sink at the edge of the drill edge and increase the life of the drill bit, which is suitable for brittle materials.
  3.  Grinding out the chip dividing groove to facilitate chip removal.

There are many points of attention and its use in grinding drill bits. If customers have difficulties in drill grinding, please consult us. We are a manufacturer of drill bit grinding machines. We are familiar with drill bit grinder product structure and function.

Control Method of Drilling Depth in Blind Hole Drilling

Important tips for drilling:

  • The feeding amount should be small when the drilling starts, and the normal drilling can be achieved only after the cutting part of the twist drill enters the workpiece.
  • When drilling through holes to be drilled through the workpiece, the feed should be small in order to prevent the twist drill from breaking.
  • When drilling small holes or deep holes, the twist drill must always be withdrawn from the drill to remove chips, so as to prevent the twist drill from “biting” or breaking because of cutting blockage.
  • When drilling steel materials, cutting fluid must be poured sufficiently to cool the twist drill in order to prevent the twist drill from heating and annealing.
drilling methods of twist drilling, drilling methods of twist drilling, drilling methods of blind holes, drilling methods of through holes, points for attention in drilling, Important tips for drilling, Important hints in drilling, Drilling methods

drilling methods of twist drilling, drilling methods of twist drilling, drilling methods of blind holes, drilling methods of through holes, points for attention in drilling, Important tips for drilling, Important hints in drilling, Drilling methods

Composition of twist drill

Twist drill is the most commonly used bit. Its body has spiral grooves and its end has cutting ability. The standard twist drill consists of shank, neck and body part.

Composition of twist drill, handle of twist drill, working part of twist drill, structure of twist drill, decomposition diagram of twist drill, use of twist drill, description of twist drill, detailed introduction of twist drill

Composition of twist drill, handle of twist drill, working part of twist drill, structure of twist drill, decomposition diagram of twist drill, use of twist drill, description of twist drill, detailed introduction of twist drill

(1) shank

The shank is the clamping part of the drill bit, which plays a central role in fixing and the role of transmitting torque in drilling. The taper shank can transfer larger torque (mainly the flat tail part of the shank), which is used for drills larger than 12 mm in diameter, while the straight shank can transfer smaller torque, which is generally used for drills smaller than 12 mm in diameter.

(2) neck

The neck is the connection between the handle and the working part, and serves as the position of the grinding wheel when grinding the outer diameter. Bigger diameter bits are marked with trademarks, bit diameters and material grades at the neck. Small diameter drill does not have neck.

(3) body

The body part of twist drill is the main part of the bit, which includes the guiding part and the cutting part.

How to assemble and disassemble twist drills?

The clamping method of parallel shank twist drill is basically the same as that of using drill chuck to install clamp center drill.

How to disassemble and install drill bits, twist drill assembly and disassembly, taper handle twist drill installation, twist drill disassembly, drill connection machine tool, drill transition sleeve, straight handle twist drill clamping, twist drill use

Clamping of taper handle twist drill

a) clamping
b) Insert directly into the taper hole of the tailstock sleeve
c) Transition cone sleeve

The taper shank twist drill can be connected with the machine tool directly or through the transition sleeve. When the taper number of the bit shank is the same as the taper number of the tailstock sleeve taper hole, the bit can be inserted directly to realize their connection. If their taper numbers are different, they must be connected to the tailstock of the lathe through a transition sleeve.

When the twist drill in the Morse transition cone sleeve is dismantled, the wedge iron can be inserted into the waist hole, and the bit can be dismantled by tapping the wedge iron.

 

How to disassemble and install drill bits, twist drill assembly and disassembly, taper handle twist drill installation, twist drill disassembly, drill connection machine tool, drill transition sleeve, straight handle twist drill clamping, twist drill use

Disassembly of taper shank twist drill

How to disassemble and assemble drills, twist drills, taper shank twist drills, twist drills, connecting machine tools, transition sleeve of drills, clamping of straight shank twist drills, and the use of twist drills

What is the process of machining sleeve parts with drill bits?

In machine parts, the parts with holes are usually called sleeve parts. The bushing shown in the figure below is a sleeve part.

Drill bit processing, nesting parts, drill bit processing, drill bit processing technology, drill bit processing method, drill bit processing part sequence, drill bit processing sleeve

Machining sleeve parts with drill bits

Machining sleeve parts with drill bit, drill bit processing procedure, drill bit processing technology, drill bit processing method, drill bit processing part sequence, and drill bit processing sleeve

Machining sleeve parts with drill bit

If a bit is used to process a set of solid workpiece, the hole must be drilled first and then different machining methods must be selected according to the precision requirements of the hole. If want to process the hole of the workpiece in the drawing, its reasonable processing technology is: drilling→reaming→turning hole→reaming.

Drill bit processing, nesting parts, drill bit processing, drill bit processing technology, drill bit processing method, drill bit processing part sequence, drill bit processing sleeve

The solid blank shall be processed according to the ” sleeve processing diagram “

The solid blank shall be processed according to the ” sleeve processing diagram “, in which the hole can be processed by drilling method to meet the requirements. The usual tool for drilling holes is a twist drill.

Inspection method after bit grinding

The worn bit can be tested by template test after grinding, but visual inspection is often used in many factories for convenience.

So how do you test it visually?

Inspection Anglewith Tool

Inspection Anglewith Tool

First of all, the cutting part of the bit is erected upward with two eyes at eye level. Since the two main cutting edges of the bit will produce parallax in front of each other, it is often felt that the two cutting edges will look higher and lower. Rotate the drill 180 degrees more times when looking at the head, if the results are the same, the symmetry will be shown. Same thing for the lip relief angle, same angle of inclination. Since the bit is grinded by hand, it needs to be inspected after it is polished.

If the drill bit grinding machine is used, the grinding bit will be more accurate and the grinding bit will be more standard. The grinded bit shall be tested and used after qualified.

The selection of main geometric parameters for the grinding of twist drill bit

The main geometric parameters of twist drill include the choice of cutting lip angle, the choice of land angle of cutting edge and lip clearance angle of cutting edge, the analysis of the influence of helix angle on the life of drill bit and the treatment of cutting edge.

 

Cutting lip angle determines chip width and bit front angle. When the diameter and feed of the bit remain unchanged, increasing the top angle will narrow the iron filings and reduce the load per unit cutting lip. Cutting lip angle has a great influence on the land angle. Increasing cutting lip angle correspondingly can improve the cutting conditions at the core. Cutting lip angle affects the direction of chip outflow. According to the relevant tool design data and the characteristics of low hardness but high viscidity of the processed product, the cutting lip angle of the bit is selected to be 140°.

 

The land angle of a twist drill is determined by other geometric parameters of the drill. In high-speed cutting, the rake angle has little influence on cutting deformation and cutting force, and the strength of tool tip can be enhanced with a smaller land angle. When the land angle is determined, the bigger the lip clearance angle is, the sharper the edge is, but the wedge angle will decrease correspondingly, which will affect the strength and heat dissipation area of the tool. For this purpose, the lip clearance angle of the drill bit is selected as a smaller one, which is 8°.

If you choose our drill grinding machine, you can easily finish the drill grinding work. You can achieve the desired results by choosing the right chuck according to your drill bit. Our drill bit grinding machine makes complex drill grinding easy. If you are interested in our products, please contact us. We are a manufacturer of drill bit grinding machines. The price is relatively favorable. We welcome agents to negotiate business.

Analysis of the influence of the helix angle of the drill bit on the service life of the drill bit

Helix Angle is the angle between the helix line on the helical groove and the bit axis after it expands into a straight line. Since the lead of each point on helical groove was the same, the helical angle was different at different diameters of the drill bit, with the maximum helical angle at the outer diameter, and the smaller the helical angle was the closer to the center. Increasing the helix angle will increase the front angle, which is conducive to chip removal, but the rigidity of the drill will decrease. Standard twist drill helix angle is 18 ° ~ 38 °. For bits with smaller diameter, the helix angle should be smaller to ensure the rigidity of the drill bit.

According to the shape of twist drill, the helix angle of each point on the cutting edge is variable, and helix angle directly affects the front angle of the main cutting edge. The larger the helix angle is, the sharper the cutting edge will be and the lighter the cutting will be, otherwise it will cause severe machining hardening and wear the blade quickly. According to the cutting tool design data, helix angle of 30 ° can satisfy the use requirement, at the same time, it can be mass production.

PURROS there are many sharpening machines. If your tools wear a little bit, you can use our tool grinder. Before you buy a new tool, you can use a grinded tool for a period of time to save manufacturing costs.

Manual grinding of high speed steel drill bits

  1. The edge is placed flat against the grinding wheel surface

This is the first step in the bit’s position relative to the grinding wheel. Some inexperienced operators lean on the grinding wheel and start sharpening the edge before they even straighten it out. This must not wear well. The “edge” here is the main cutting edge. “Leveling” means that the main cutting edge of the sharpened part is in a horizontal position. “Wheel surface” refers to the surface of the grinding wheel, “against” is slowly close to the meaning. At this point, the drill bit cannot touch the grinding wheel;

 

  1. Oblique drill shaft repair sharp Angle

Here refers to the axis of the bit line and the location of the relationship between grinding wheel surface, “Sharp Angle” is the half of the point Angle 118 ° ± 2 ° , it’s about 60 °. This position is very important, which directly affects the size of the point Angle of the drill bit, the shape of the major cutting lip and the chisel edge Angle. Do not neglect to lay down the bevel Angle in order to lay down the cutting edge, or to lay down the axis in order to lay down the cutting lip. These errors are common in practice. At this point, the drill bit is ready to contact the grinding wheel in the correct position;

 

  1. From the edge to the back of the grinding

This refers to the grinding of the bit’s edge slowly along the entire back surface, starting from the edge of the bit. This facilitates heat dissipation and sharpening. At this point, the bit can gently contact the grinding wheel for a small amount of edge grinding. When grinding the edge, observe the uniformity of spark, adjust the hand pressure in time, and pay attention to the cooling of the drill bit. When the edge grinding starts again after cooling, continue to set the position.

www.drillbitgrinder.com The Universal Tool Grinder is offered by Purros Machinery Co., Ltd., a professional OEM/ODM tool grinder manufacturer and supplier, End Mill Grinder, Twist Drill Grinder, Lathe Cutter Grinder, Carving Tool Grinder, Drill Sharpener, Universal Grinder, etc.

The Universal Tool Grinder is offered by Purros Machinery Co., Ltd., a professional OEM/ODM tool grinder manufacturer and supplier, End Mill Grinder, Twist Drill Grinder, Lathe Cutter Grinder, Carving Tool Grinder, Drill Sharpener, Universal Grinder, etc.

Manual grinding of high speed steel bit is subject to human factors. Manual grinding will result in a large error of the drill bit due to the difference between human experience and personal intuition. But machine repair and grinding completely avoid this problem. Drill bit grinding machine is more accurate, and the error is small, the human factors are relatively small. Operators do not need to go through professional drill grinding training can be on duty. The operation of the drill bit grinding machine is very simple and the efficiency of the drill bit grinder is very high. Therefore, now many companies that use drill bits choose to buy a drill bit grinding machine to repair the damaged drill bits, which saves a lot of cost. Our tool grinding machines are of very good quality and have been well received by our customers in the market. Welcome to inquire purchase.