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

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Shanghai
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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:What are the commonly used hardware materials? What are their respective properties?
Stainless steel (SUS)SUS301----1/2H, 3/4H and H features: good corrosion resistance, good cold workability, non magnetic in the burn back state, and magnetic after cold working. Application: used for vehicle parts, springs, buildings, hardware, etc..SUS304----1/2H, 3/4H and H characteristics: good corrosion resistance, low temperature strength, good mechanical properties, good work hardening, heat treatment, non hardening, non magnetic. Uses: household appliances, building decoration, vehicle parts, medical instruments, food industry and chemical industry.
Q:What does "R0.5max" mean in hardware drawing?
The maximum chamfer diameter is 0.5; the general unit is MM, MIN: minimum MAX: maximum
Q:What does the home improvement hardware include? What are your buying skills?
Decoration hardware including what? How to choose and buy? It is a lot of people's troubles. Decoration is a very complicated matter, large building materials, furniture, sanitary ware, small door, door hinge, bath towel, etc. this pendant pumping railSome hardware fittings, which can not be less. When the purchase of hardware, we must choose the good sealing performance of the hinge. Hardware in the home improvement costs about 3%-5%, the proportion is small, but can not be ignored. Hardware according to use functionDivided into ordinary hardware and special hardware. The general hardware set way into the lock, hinge, slide, handle, hanging round, nail, plate bracket, door stopper, hook, touch beads, touch plate pin card, etc.. Special hardware according to the way setDivided into bathroom hardware and kitchen Pendant category. I only introduce common hardware, special hardware to be late.
Q:What is a hardware cooker?
Cookware, such as metal products (metal and other materials, such as wood and plastic), is part of a hardware cookware category.
Q:What is wooden door hardware?
The doors of the hardware is to lock the gate leaf. These ones here
Q:Does hardware affect the tightness of doors and windows?
The main window is divided into windows, windows and wood windows and other types of.It is made of glass, section bar, hardware, sealing strip and so on. The sealing of doors and windows is made up of all parts, including the quality of the glass, the quality of the profiles, the quality of the sealant (mainly), the quality of the hardware, the quality of the doors and windows.The tightness is mainly related to the sealing strip they use.
Q:Which part is responsible for leakage of hardware?
If the warranty period has passed, the water should be public property maintenance, the loss is the property bear, you can see their property contract, if the property is not in this part of the cost of public use of water pipes, responsibility and use you, if you are using the water, after the warranty period, the responsibility of all is he.
Q:How do you do the hardware business?
I saw slogans such as "customers - your competitors" on a lot of salesman training occasions. Think carefully, is that an accurate point of view? Opponents are used to defeat or destroy. You may think it's honorable on the battlefield, but it's a disaster for you to beat customers in the business world. In fact, the real negotiation is gentle, not murder, customers want to be the winner of a deal. Therefore, you should give full play to the skills of communication with each other, to respect and friendly attitude to face customers, but also to allow customers to fully appreciate your efforts for him. In any transaction, only a win-win situation can be maintained in order to maintain long-term business relations. In fact, this is a simple one
Q:What kind of hardware do you have?
Many kinds of hardware products, different specifications of hardware products, but in the Home Furnishing decoration also plays an irreplaceable role, choose a good hardware accessories can make a lot of decoration materials use more safe and convenient. At present, there are more than ten kinds of hardware products in the materials market.
Q:I would like to ask the so-called jewelry hardware refers to which hardware, including what?
Hardware refers to: gold, silver, copper, iron, tin, hardware is the mother of industry, the foundation of national defense. Hardware has a wide spread, often used in iron and tin

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