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

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

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.

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.

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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

Grinding the concave arc edge and strengthening the centering function of the drill are helpful for chip separation and chip breaking.
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.
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.

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

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.

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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.

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.

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

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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

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;

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;

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.

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Standard of tool dressing

Whether or not you have a good set of standard is the standard to measure whether a center is professional. Standard of grinding, the general rules for different Cutting tool in Cutting different materials when the Cutting edge of technology parameters, including the blade Angle, Cutting Lip Angle, rake Angle, Lip Clearance Angle, blade, chamfering etc parameters (in the carbide drill, make the blade passivation process is called “blade”, pour the width of the blade and the Cutting material, generally between 0.03-0.25 Mm. The process of chamfering on the edge (tip) is called chamfering. Each professional company has its own years of review and repair standards.

The use and safety management of drill bit grinder grinding wheel

Differences between HM drill and HSS drill:

HSS drill bit: Cutting Lip Angle is usually 118 degrees, sometimes greater than 130 degrees; The blade is sharp; The precision (edge elevation, symmetry, circumferential pulse) is relatively low. There are many ways to mend a chisel edge.

HM drill bit: Cutting Lip Angle generally 140 degrees; Straight slot drills are usually 130 degrees and three-edge drills are generally 150 degrees. The blade and tip (edge) are not sharp and are often passivated, or referred to as chamfering and chamfering; High demand for accuracy. The chisel edge is often cut into an s-shape for cutting.

Lip Clearance Angle:

The Lip Clearance Angle of the blade is very important for cutting tools. Lip Clearance Angle is too big, the blade is flabby and easy to tie up. Lip Clearance Angle is too small, then friction is too large, cutting disadvantage.

The Lip Clearance Angle of the cutter varies with the cutting material, type and diameter of the cutter. Generally speaking, the Lip Clearance Angle decreases as the cutter diameter increases. In addition, if the cut material is hard, the Lip Clearance Angle is smaller, otherwise, the Lip Clearance Angle is larger.

The drill bit grinder developed by PURROS is very popular in the market, and we can accept OEM custom service at the same time!

Why are so many customers buying universal tool grinding machines now?

The universal tool grinder has been a hot seller in recent years. A large part of the reason is that more and more people have realized its importance and its advantages. Why don’t we take the worn-out tools to a professional organization for grinding and choose to buy the Universal Tool Grinder for grinding?

What kind of tools need grinding?

Most cutting tools require grinding and are designed with future grinding in mind.

The small-diameter taps and most of the indexable blades give up the grinding due to their low price and relatively high grinding cost.

Some of the machined cutting tools of the groove can not be sharpened because the diameter should be reduced after grinding.

Why do tools need sharpening?

Tool grinding is a low carbon activity to reduce production cost and resource consumption.

Key points of tool grinding

Sharpen the dull and worn original blade, and grind the new blade on a better matrix.

The wear of the guide part must be taken into account comprehensively for hole cutting tools.

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How to deal with tool wear?

Tools is arguably the most commonly used key component, and it’s also easy to wear out. How to reduce the tool wear is very important.

Common causes of tool wear:

All components of the cutter will be worn by milling and shaping materials. If one of the components of the cutter is damaged, such as the blade tip, steel body, gasket or snap spring, the entire cutter should be replaced to prevent damage to the relatively expensive tool holder system. Moreover, the replacement of the cutter holder system is more complicated. Therefore, how to reduce the tool wear is very important.

How to deal with tool wear with drill bit grinder

Common tool wear includes the following reasons:

Incorrect installation;
Use components from different manufacturers;
Choose the wrong type of cutter (different type of cutter should be selected for different types of machine);
Milling planer materials are bonded and continuously accumulated on the cutter, which is generally caused by incomplete cleaning;
Insufficient water supply in the sprinkler system inside the casing of milling plane.

Universal Tool Grinder PG-600F

How to reduce tool wear?

Tool wear is unavoidable, but can at least be minimized. Adequate water supply is the basic premise to ensure normal rotation of cutter. According to the material selection of milling cutter, can also optimize the use and reduce wear.

Select the suitable working condition milling tool;
Pay attention to daily thorough cleaning;
Regularly check the cutter, and timely find and deal with the wear or damage of components;
Regular maintenance and inspection of sprinkler system;

Only through proper maintenance can the wear of key parts be minimized, thus greatly saving cost and ensuring efficient operation of the machine. If the cutter is only slightly worn, a cutter grinder can completely repair the wear. The use of universal tool grinder can reduce the waste of many tools, saving cost and time.

How to solve the problem after the bit is broken?

Cause	Solution
Bending, deformation, sliding	Increase the rigidity of tool and machine tool, increase the rigidity of workpiece and jig
Lip Relief Angle is too small	Regrinding Lip Relief Angle
High Stock Removal	To reduce Stock Removal
Bit wear	Use drill bit grinder to grinding
Blocking of chips	Re-select the alloy bit (chip groove, helix Angle); Re-select machining method (adjustment of feed rate, step-step method, etc.)
Poor cutting	Increase the rigidity of tools and machine tools Increase the rigidity of workpiece and jig Predrilling center hole The cutting plane is first adjusted or processed into a horizontal plane with a guide sleeve