Flat Bottom Drill with High Quality

Details about Flat Bottom Drill                                    

1.Description of Flat Bottom Drill:

1). Material:   Carbide/ steel

2). Hardness:  Upon requirment

3). Heat Treatment:  Easily heat treated

4). Quality:  High precision, professional technology and skill

5). More Information about twist drill bit:

      A. Definition and History of Twist Drill Bit:

      The twist drill bit is the type produced in largest quantity today. It comprises a cutting point at the tip of a cylindrical shaft with helical flutes; the flutes act as an Archimedean screw and lift swarf out of the hole.

      The twist drill bit was invented by Steven A. Morse of East Bridgewater, Massachusetts in 1861.The original method of manufacture was to cut two grooves in opposite sides of a round bar, then to twist the bar (giving the tool its name) to produce the helical flutes. Nowadays, the drill bit is usually made by rotating the bar while moving it past a grinding wheel to cut the flutes in the same manner as cutting helical gears.

       Twist drill bits range in diameter from 0.002 to 3.5 in (0.051 to 89 mm) and can be as long as 25.5 in (650 mm).

     The geometry and sharpening of the cutting edges is crucial to the performance of the bit. Small bits that become blunt are often discarded because sharpening them correctly is difficult and they are inexpensive. For larger bits, special grinding jigs are available. A special tool grinder is available for sharpening or reshaping cutting surfaces on twist drill bits in order to optimize the bit for a particular material.

      Manufacturers can produce special versions of the twist drill bit, varying the geometry and the materials used, to suit particular machinery and particular materials to be cut. Twist drill bits are available in the widest choice of tooling materials. However, even for industrial users, most holes are drilled with standard high speed steel bits.

       The most common twist drill bit (sold in general hardware stores) has a point angle of 118 degrees, acceptable for use in wood, metal, plastic, and most other materials, although it does not perform as well as using the optimum angle for each material. In most materials it does not tend to wander or dig in.

      A more aggressive angle, such as 90 degrees, is suited for very soft plastics and other materials; it would wear rapidly in hard materials. Such a bit is generally self-starting and can cut very quickly. A shallower angle, such as 150 degrees, is suited for drilling steels and other tougher materials. This style of bit requires a starter hole, but does not bind or suffer premature wear so long as a suitable feed rate is used.

        Drill bits with no point angle are used in situations where a blind, flat-bottomed hole is required. These bits are very sensitive to changes in lip angle, and even a slight change can result in an inappropriately fast cutting drill bit that will suffer premature wear.

     B. Coating:

• Black oxide is an inexpensive black coating. A black oxide coating provides heat resistance and lubricity, as well as corrosion resistance. Coating increases the life of high-speed steel bits.
• Titanium nitride (TiN) is a very hard ceramic material that can be used to coat a high-speed steel bit (usually a twist bit), extending the cutting life by three or more times. However, when the bit is sharpened the new edge will not have the benefits of the coating.
• Titanium aluminum nitride (TiAlN) is a similar coating that can extend tool life five or more times.
• Titanium carbon nitride (TiCN) is another coating also superior to TiN.
• Diamond powder is used as an abrasive, most often for cutting tile, stone, and other very hard materials. Large amounts of heat are generated by friction, and diamond coated bits often have to be water cooled to prevent damage to the bit or the workpiece.
• Zirconium nitridehas been used as a drill bit coating for some tools under the Craftsman brand name

2. More pictures about our product:

3. Delivery: 

           Delivery time is usually 3-7days for products, specific time is according to quantity

4. Shipping: 

        We ship using express such as DHL, UPS, FEDEX etc. or according to customer's requirement

        Our Shipping target is to dispatch the day following receipt of cleared payment.
     Please allow 7 days to receive your order.

5. Payments:

         TT, Western union and money gram, etc

6. Packing:

         Cartons, plastic bags or upon request

About us:

 Leading supplier of twist drills  

            We have an extensive stock holding and we ensure your order is properly packaged and dispatched to wherever you are in the world.

            We have been in business many years, our reputation is important to us. We always try to be as fair as possible. If you have any concern, please feel free to contact us. Your friend Elsie always be here.

            Our mission is lower the costs, stick with the good qualites, produce great products.

The major products we are selling now:

1. Mould component (straight punch, guide bush, guide pin, etc.)

2. Cutting tools (straight shank end mills, roughing end mills, tapered end mills, etc.)

3. Abrasive instrument (straight wheels, "gesswein" stones, etc.)

4. Measuring tools (vernier calipers, dial calipers, digimatic vernier calipers, etc.)

5. Maching tools (universal dividing head, angle fixed milling vise, etc.)

6. Hand tools (diamond needle file, diamond needle taper files, etc.)

7. Industry oils (Rocol, Mobil, Castrol, etc.)

PS. The more you get, the more discount you will be given.

Why choose us:

1.  Specialized in precision mold and mold part ,inquiries will get highly attention and be prompt response.(within 24 hours)

2.  Advanced facilities and experienced engineers, rich experience in mold part

3.  Guaranteed quality, superior material quality compared to all other

4. Customer oriented, efficient solution to control the cost for our client

5.  One-stop service, any questions can be solved at the first time by us

6.  Each part has been got 100% test and tryout before shipment