Good quality High efficiency ~ left hand drill bits & HF drill bit

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Shanghai
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TT OR LC
Min Order Qty:
100 pc
Supply Capability:
100000 pc/month

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Product Description:

Specifications

1. Offers a complete line of Metal Twist Drill Bits, such as straight shank, taper shank, etc;

2. Process: fully ground;

 

Dimensions

1. Drill diameter - The values indicated in the relevant dimensional standards apply in respect of the diameter of twist drills.

Test point: On the lands at the corners

Testing equipment: micrometer

 

2. Tapering of diameter - The diameter of twist drills usually reduces from the drill tip towards the shank in the area of the flutes.

Test values: The taper on diameter amounts to 0.02 to 0.08mm over a length of 100mm.

Test point: At the outside diameter on the land.

Testing equipment: micrometer and indicating measuring instruments.

 

3. Parallel shank - Tolerance for shank diameter f11, Tolerance for roundness and parallelism 0.02mm for the shank length.

 

4. Length - The tolerance of length for the total length corresponds for the degree of accuracy "very coarse" according to DIN standards. The flute lengths given in the relevant dimensional stands are minimum dimensions.

 

5. Point angle

Test value: σ=118°; σ=135°

Test point: At the cutting edges

Testing equipment: Universal bevel protractor indicating measuring instruments.

 

Materials and hardness

Materials - M2, M35, M42, 9341, 4341, 4241, etc

Hardness - HSS HRC63-66; HSSCo HRC64-68

Test point: On outside diameter on the land or adjacent relieved land.

Test equipment: Hardness Tester.

 

Marking

Twist drills with diameter 3mm and upwards shall be marked with:

1.Diameter;

2.Material: (HSS, HSSCo);

3.Additional and/or differing marking by agreement.

 

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Q:Please tell people where can to buy genuine hardware accessories?
To hardware mall, to the regular store. Distribution of various brands of shops.
Q:What are the hardware parts of the door?
Hardware fittings are hardware parts or parts made of hardware, and some hardware products. It can be used alone or as a aid. Such as hardware tools, hardware parts, daily hardware, construction hardware and security supplies. Most hardware products are not final consumer goods. But as industrial manufacturing supporting products, semi-finished products and tools used in the production process and so on. Only a small number of household hardware products (fittings) are the consumer goods of tools for people's daily life.
Q:What's the hardware in the wardrobe industry?
The hardware includes a wardrobe door hinge, handle, drawer rails and other structural parts and accessories such as clothes hanging rod: made of Aluminum Alloy materials, high hardness, large bearing surface, anodized, abrasion resistance, cut flower. The circular surface is provided with a plurality of technological lines, which not only have decorative effect, but also play the role of anti-skid. Guide rail: drawer adopts heavy three section rail or three section slide rail, push and pull smooth and silent, bearing capacity is big, can push and pull more than 100 thousand repeatedly. Pull the plate for a towel and other small items, using common backing tracks. Pull basket: cold rolled steel with surface plating, the effect is shiny and smooth. Surface without flow, bump, no yellow, no delamination, no rust, long shelf life. Laminated buckle: embedded panel buckle prevents the board from slipping. Trousers rack: used for stainless steel folding hanging pants, trousers made straight without wrinkles. Shelf: used to display towels, scarves, hats and other small items of life. Plywood: used for displaying ornaments, cosmetics and other daily necessities. Chuanyijing: built-in sliding mirror is an indispensable item dressing.
Q:What is wooden door hardware?
Having specific functionsIt includes: wooden door lock, cabinet handle, bathroom pendant, clothes hanger and so on.
Q:Hardware should be how to buy?
Look at the material. Now the market of bathroom accessories materials about the following: titanium alloy, stainless steel, copper and chrome, chrome Aluminum Alloy chrome, iron chrome and plastic hardware accessories and so on, the quality of titanium alloy of these materials in the best and the worst quality of plastic products, pure copper products to prevent oxidation, rarely appear faded; chrome plated stainless steel prices, but the use of a relatively short time. Although hardware accessories are small things, consumers should pay attention to choose good quality products, otherwise, every part of the time to replace parts.
Q:Hotel room toilet stainless steel parts, how to maintain?
Cleaning area, other hardware cleaning and maintenance matters needing attentionThe common hardware in the bath area is bathroom cabinets, metal chains, hinges, slides, towels racks, shelves, frames, etc..
Q:I would like to ask the so-called jewelry hardware refers to which hardware, including what?
In some places, not including marriage Anklet hardware, but need a pair of bracelets, this represents a good double happiness. Therefore, the new couple might as well ask your elders before you buy the wedding hardware, and learn from each other, but you must choose according to the local customs.Hardware accessories, as the name suggests, is made of hardware raw materials, jewelry, he appeared in every corner of life. Up to the building to the key buckle, as long as pay attention to beauty and decoration, that will reflect the hardware jewelry.Specific to the points, according to its nature to be divided, we can be divided into metal jewelry, plastic jewelry and so on. According to its size can be divided into home accessories, mechanical jewelry, as well as exquisite jewelry and gift jewelry. At present, we refer to hardware jewelry mostly refers to gifts.Hardware jewelry mainly has small ornaments, mobile phone accessories, cartoon characters, wear jewelry, twelve constellations, twelve zodiac signs, pendants, letters, letters, KT, cat, Disney, mascot, other jewelry and other categories.At present, Dongguan and Wenzhou are the largest production base of hardware decorations in china. After 2000, with the decline of the European and American markets and the rise of raw materials, and the rise of the domestic market. Hardware jewelry manufacturers began to pay attention to domestic people's appreciation, orientation and consumption level, began to turn to "small profits and quick turnover" era.
Q:How many kinds of hardware are there in this industry?
Hardware can actually be divided into tools and hardware two categories;The tools below can be subdivided:Manual tool (brush, scissors, pliers, screwdriver, wrench, hammer, file, tap die, pump, etc.) (saw blade, a chainsaw, etc.)Pneumatic tools (pneumatic wrench, pneumatic scissors, drilling, etc.)Electric tools (electric polishing machine, electric drill, electric hammer, electric wrench, electric scissors, air guns and etc.)Auto repair toolsConstruction equipment and toolsGaugeGardening tools and equipmentDiamond toolsAbrasives, abrasive (grinding wheel, grinding head, grinding block, sand paper, Whetstone, polishing wheel, grinding agent, polishing paste, etc.);Hardware subdivided into:Hardware fittings (hook, steel ball, pulley, nozzle, universal wheel, rigging, etc.)Construction hardware (locks, fittings, doors and windows, hardware, etc.)Mechanical hardware (bearings, dies, springs, valves, cutting tools and clamps, pneumatic components, etc.)Daily hardware (knife, scissors, etc.)
Q:How to distinguish the advantages and disadvantages of bathroom hardware?
Raw materials: zinc alloy Liepin generally use inferior recycled materials as raw materials, and cut corners to reduce costs, loose structure, light weight, feel giddy. Superior products: general use fine cast pure copper, high-quality zinc alloy or titanium alloy as raw material, tight structure, heavy weight, feel thick. Raw material, YISHION and copper are preferred. The casting and finishing process: the shortage of small Liepin die casting machine and simple machine, pressure, product gross PI surface pores, cracks and surface defects of wire lines, inequality, polishing process rough, simple process. Superior products: the use of large precision computer control die-casting machine tools and digital precision machine tools, rough surface smooth, smooth, no pores, silk defects and other phenomena, grinding and throwing, when the process is rigorous, a wide range of processes. The plating: plating Liepin is thin and uneven, loose structure, poor adhesion, luster, the chrome plated directly in the blank, after a period of time, the surface is easily corroded, wear, blistering and peeling off. The coating thickness is less than 20 microns, the material is easy to be oxidized by air, and the coating surface has many scratches and burrs. Products: in strict accordance with the national standard electroplating technology, using imported raw copper, nickel, chromium and copper after, three plating process, depending on the sense of thick, shiny, long-term use will not wear, corrosion, foaming or peeling,. Compact structure, uniform coating, "" crisp, color surface coating thickness in general more than 30 microns, no scratch coating surface and burr. The accessories Liepin: fasteners made of steel screws, easy to rust, glass products made of low-grade products, uneven thickness, low transparency, visual sense of opacity. Excellent...
Q:What's drawing design in a hardware factory?
Hardware factory drawing design is to use CAD or proe to do some mapping and three-dimensional parts of some small parts.

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