HSS-CO cobalt drill bit, Straight shank twist drill,specially used in stainless steel processing

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Shanghai
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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:How to maintain the hardware?
Always use soft cotton or sponge with neutral soap water to wipe the surface of the faucet, to avoid water containing trace amounts of carbonic acid, forming scale, and corrosion on the surface of the faucet
Q:The bathroom hardware should be stainless steel or Aluminum Alloy it?
The preferred stainless steel with good economic condition has the advantages of easy cleaning and durability, and strong toughness
Q:What does hardware include?
Hardware for construction hardware, metal, locks, nails, iron wire, steel wire mesh, wire scissors, home hardware, tools and so on.
Q:Does hardware affect the tightness of doors and windows?
Let me put it briefly.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. For example, the common casement window adopts three yuan ethylene propylene sealant strip, while the sliding window adopts the sealed top.
Q:What are the commonly used hardware materials? What are their respective properties?
Cold rolled steel sheet (SPCC), ----SAE1006, SAE1008Features: smooth finish - good mechanical properties, smooth surfaces with fine abrasive lines. Blunt surface treatment with good mechanical properties, fog, matte finish.Purpose: because it contains a small amount of residual elements, corrosion resistance and excellent, so it is widely used in galvanized or colorOn galvanized steel sheet, suitable for hardware products with special surface requirements.
Q:Please tell people where can to buy genuine hardware accessories?
TX should choose to go to large stores to buy, quality and service to protect some.
Q:How do housekeeping refer to hardware accessories with good or bad?
Import lubricating oil spring hinge parts use the light yellow or milky white top oil, has a long service life; and most of domestic use of black yellow or white color of the cheap oil lubricating oil, easy to dry, and lubrication in hot days when the oil viscosity is very low, took the hinge after feel caught a hand oil.
Q:I opened a small hardware factory, and I also have a few punch, want to do hardware accessories, and do not know what kind of good to do, good money, beg!
Small pieces, as long as the amount, you can certainly make money steadily
Q:What are the commonly used hardware in the customized wardrobe?
Iron: wildebeest used for reinforcement between two pieces of plate. Connecting cabinet screw: the cabinet body connects with the cabinet body, in order to achieve the steady function
Q:What brand of hardware is better?
Buy Bathroom Hardware recommended to buy the big brands, of course, in order to avoid unnecessary trouble I suggest you choose those big brands, with the quality of customer service in this regard will be controlled better, like ATGET, a brand of bathroom hardware dily V - O of the two one brand is I trust, with the overall feeling Ya Jie is my home is good, and the Delong Delong, Yatin Yatin, HAVA HAVA, ArgentCrystal ArgentCrystal, elegant, these brands are good brand reputation, are the ten famous network on the china-10 are the latest bathroom hardware accessories

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