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15pcs HSS Titanium Drill Set
Item No:CT1066
Content:1.5*2,2.0*2,2.5*2,3.0,3.2,3.5,4.0,4.5,5.0,6.0,8.0,10mm
Complete with High Quality Plastic Case with Double Blister
24sets/carton:55*38*24cm
These drills are made of high speed steel,and the hot roll forged flute and special heat treatment gives additional toughness.And this product is perfect for drilling wood,cast steel,malleable iron, sintered
metal,non-ferrous metal etc.Surface finishing will highly improve the drill bit’s life span.
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.
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.
Coating:
Titanium: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.
Plastic case with double blister,to standard export carton.
Established in 2000, Hangzhou Maxwell Tools Co., Ltd. which is located the beautiful West Lake in Hangzhou City, We specializes in designing and manufacturing excellent quality of hand tools, pneumatic tools and power tools.
We have a strong R&D design ability to ensure that you are getting the stable performance products produced with the most advanced and cost effective technologies. Our QC department promises that every material has passed our strict inspection before assembling or producing. And each product will have strict inspected before delivery.
Our products have been exported to many countries and regions throughout the world in Europe, North America, South America, Australia, Southeast Asia, South Africa, etc. We have won a good reputation among our customers by providing high quality, safe and reliable Tools as well as fast and efficient service.
As we have exhausted ourselves to control the best quality. All products we supplied and installed are warranted against defects in merchantable quality and workmanship.
Our Target is to provide you with the best quality products at the most competitive prices. We have a wealth of knowledge, experience in the field of Tools. We can provide excellent advice and support to insure you get the right products. We are looking forward to establishing favorable and long-term cooperative relationships with you.
We welcome your inquiry! We warmly welcome to visit Hangzhou Maxwell Tools Co., Ltd.
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