Product Description
Drill Bits Carbide drill bits offer superior performance on various types of material from soft tile to glass to hard concrete. Our carbide bits have specially designed centering tips to start drilling holes easily and accurately. Tungsten carbide drill bits also feature a coating that helps you reduce heat and friction when you're drilling. Various shanks mean our carbide drill bits are suitable for rotary or impact drills and drivers as well as screwdrivers. Most carbide drill bits fit our drills universally and are available individually and in sets. We offer a wide range of carbide drill bits to provide superior performance when drilling.
A drill bit is a cutting tool used in a drill to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can create different kinds of holes in many different materials. In order to create holes drill bits are usually attached to a drill, which powers them to cut through the workpiece, typically by rotation. The drill will grasp the upper end of a bit called the shank in the chuck. Drills come in standardized drill bit sizes. A comprehensive drill bit and tap size chart lists metric and imperial sized drills alongside the required screw tap sizes. There are also certain specialized drill bits that can create holes with a non-circular cross-section.
Drill geometry has several characteristics:
- The spiral (or rate of twist) in the drill bit controls the rate of chip removal. A fast spiral (high twist rate or "compact flute") drill bit is used in high feed rate applications under low spindle speeds, where removal of a large volume of chips is required. Low spiral (low twist rate or "elongated flute") drill bits are used in cutting applications where high cutting speeds are traditionally used, and where the material has a tendency to gall on the bit or otherwise clog the hole, such as aluminum or copper.
- The point angle, or the angle formed at the tip of the bit, is determined by the material the bit will be operating in. Harder materials require a larger point angle, and softer materials require a sharper angle. The correct point angle for the hardness of the material influences wandering, chatter, hole shape, and wear rate.
- The lip angle is the angle between the face of the cut material and the flank of the lip, and determines the amount of support provided to the cutting edge. A greater lip angle will cause the bit to cut more aggressively under the same amount of point pressure as a bit with a smaller lip angle. Both conditions can cause binding, wear, and eventual catastrophic failure of the tool. The proper amount of lip clearance is determined by the point angle. A very acute point angle has more web surface area presented to the work at any one time, requiring an aggressive lip angle, where a flat bit is extremely sensitive to small changes in lip angle due to the small surface area supporting the cutting edges.
- The functional length of a bit determines how deep a hole can be drilled, and also determines the stiffness of the bit and accuracy of the resultant hole. While longer bits can drill deeper holes, they are more flexible meaning that the holes they drill may have an inaccurate location or wander from the intended axis. Twist drill bits are available in standard lengths, referred to as Stub-length or Screw-Machine-length (short), the extremely common Jobber-length (medium), and Taper-length or Long-Series (long).
Most drill bits for consumer use have straight shanks. For heavy duty drilling in industry, bits with tapered shanks are sometimes used. Other types of shank used include hex-shaped, and various proprietary quick release systems.
The diameter-to-length ratio of the drill bit is usually between 1:1 and 1:10. Much higher ratios are possible (e.g., "aircraft-length" twist bits, pressured-oil gun drill bits, etc.), but the higher the ratio, the greater the technical challenge of producing good work.
The best geometry to use depends upon the properties of the material being drilled. The following table lists geometries recommended for some commonly drilled materials.
Product Parameters
Tool geometry[2]
| Workpiece material |
Point angle |
Helix angle |
Lip relief angle |
|
Aluminum
|
90-135 |
32-48 |
12-26 |
|
Brass
|
90-118 |
0-20 |
12-26 |
|
Cast iron
|
90-118 |
24-32 |
7-20 |
|
Mild steel
|
118-135 |
24-32 |
7-24 |
|
Stainless steel
|
118-135 |
24-32 |
7-24 |
|
Plastics
|
60-90 |
0-20 |
12-26 |
Detailed Photos
After Sales Service
1. Help Desk and Technical Support Services.
2. Real-time online support includes email, chat, forums, and a social media interface (and monitoring) that assists in responding to public complaints and criticisms. This may include handling returns or repairs.
3. Real-time online support includes email, chat, forums, and a social media interface (and monitoring) that assists in responding to public complaints and criticisms. This may include handling returns or repairs.
4. Automated Support Resources This may include easily-accessible online solutions that involve forums where customers may interact with other users or experts, post questions, or search for answers.
5. All production is completed using a strict quality control system. In the event a product is found to be defective, we will
replace the product or provide a refund of the purchase price.
Our Company is proactive in reaching out to customers after a purchase is made to ensure that their experience is as good as it can be. Reaching customers early can avoid product returns and public complaints,
which can lead to negative public perceptions. Such interaction should be ongoing, as well, and give customers the opportunity to revalidate their decision to buy a product. Companies should also make it easy for
happy for our customers to share their experiences with their products, such as providing the opportunity to post reviews, ideas and stories on social media.
FAQ
1. Q: What's your MOQ(minimum order quantity)?
A: One full 20ft container or 40ft container , mixed products are acceptable. We can produce as per your quantity based on different products. Please feel free to contact us, let's discuss furtherly.
2. Q: What's your packing methods?
A: Packed in bundle or bulk (customed is accepted). For steel pipes, we pack by steel strips with 61 pieces in bundle. Steel plan, steel frame, and steel prop are packed by steel strips in bundle. Couplers are in pallet.
3. Q: What's your delivery time?
A: 3-5 days after received the advance payment. For stel pipe, we can arrange shipment within 3-5 days usualy we have steel pipe in production line. For steel plank, steel prop and scaffolding frame, We will try our best to arrange shippment asap. Also we can arrange partial shipment based on your quantity.
4. Q: Are you manufacturer or trader?
A: We are a professional steel product manufacturer with more than 15 years of export experience. We have our own factories, one is for steel pipe, one is for galvanization, another is for scaffolding, such as steel plank, steel prop and steel frame. We have over 100 workers, with 5 welding line. Our products are exporting to Southeast and Mideast Asia, EU market. With our own factories, we can control the production cost and delivery time better. And provide you high quality goods with moderate price.
5. Q: Where's your factory?
A: Our factory is in Tianjin city (near Beijing), close to Tianjin Port. Our factory is located in the biggest steel industrial zone in China, with the steel industrial concentration, we can get raw material and fittings very fast, and arrange shipment ealrier.
6. Q: Can we visit your factory?
A: Warmly welcome. Once we have your schedule, we will arrange the professional sales team to follow up your case. It is helpful to know better about our factory. We can also do the remote inspection based on current coronavirus situation.
7. Q: Can you supply other scaffolding materials?
A: Yes. All related construction materials, such as scaffold tube, steel plank, scaffolding frame. scaffolding couplers. Besides, we can also source for you.
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