Good quality High efficiency ~ left hand drill bits & HF drill bit
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 pc
- Supply Capability:
- 100000 pc/month
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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.
- Q: How many kinds of hardware are there in this industry?
- 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. 1, lock (1) is arranged outside the lock (2) lock (3) lock the drawer (4) ball type door lock (5) glass window lock electronic lock (6) (7) (8) chain lock anti-theft lock (9) lock the bathroom (10) (11) number lock padlock (12) the lock (13) lock core 2, handle class (1) drawer pull hand (2) cabinet (3) glass door handle 3, doors and windows hardware (1) glass hinge: hinge, hinge, hinge corner bearings (copper and steel), pipe hinge hinge (2) (3): drawer track rail, sliding door track, hanging wheel, glass block
- Q: What kind of goods do you need to open a hardware store?
- Such as furniture hardware accessories can be divided into functional hardware and decorative hardware two types. Functional hardware refers to the hardware parts that can achieve certain functions of furniture, such as connectors, hinges and slipway. We also need to pay attention to the doors and hardware accessories. Such as lotus and other hardware, the gold and silver and brass and iron, tin five metal materials, hardware is the mother of industry; the national defense foundation, hardware product material, usually divided into two categories of hardware and hardware. Big hardware includes steel plate, steel, flat iron, steel bar, universal channel iron, I-iron and various types of hardware, building hardware, tin, lock nails, wire, steel wire, steel wire cutting, home hardware, tools etc.. On the nature and use of hardware, iron and steel materials, non ferrous metal materials, machinery parts, transmission equipment, auxiliary tools, working tools, construction hardware, household hardware and other eight categories are to be considered
- Q: What kind of hardware installation is there in order of home decoration?
- If the door (door and door): first hinge positioning (or repair groove), temporary installation - positioning lock, remove the lock - processing and installation after formal installation of the door, and installed in the positioning door -- etc.
- Q: How do housekeeping refer to hardware accessories with good or bad?
- The opening and closing of the imported hinge lighter, domestic general hard hinge, the hinge screws also adjust the import closely, first used a screwdriver to screw only, and many domestic hinge with the adjustment screw is not tight enough, can be rotated by hand.
- Q: Is the hardware store profitable?
- Each row from do profit ratio is about the same, about 10-30, 10 is 30, is relatively small, generally Maori words can say it, but there is little profit. Of course, refers to the rules of doing business, not to engage in the door. If you want to know what the experience at least know quality cost. This shop is the shopkeeper, but still need to go out to run a single, to the long-term stability of the single to make money. Store address requirements are not high. Some people take orders, the ability is very strong, then directly in the small courtyard to open a money.
- Q: How to maintain the hardware?
- The daily maintenance of hardware is simple, do not need to engage in those special things, as long as the partition time with a clean towel wipe it
- Q: What is the rebate rate for hardware?
- You this question is general Oh, specifically to see the screw material (steel, copper) and use, in order to determine its tax rebate rate, 5% is yes.
- Q: CNC lathe processing precision hardware, how to choose the grinding wheel?
- Silicon carbide grinding wheels are suitable for grinding hard alloy and other tools with higher hardness.
- Q: What's drawing design in a hardware factory?
- I have done in the hardware factory mapping, using CAD or proe do, surveying and mapping is the first to return the drawings, in software measurements. Yes, some need your own design, some other factory orders and processing drawings, you have to translate them to your factory standards. Hope to adopt!
- Q: Hardware should be how to buy?
- See coating. Coating treatment is essential for hardware pendants, which relate to service life, finish, and wear resistance. The good coating is black and shiny, with a sense of moisture, while the inferior coating is dull. The good coating is very smooth, and the inferior coating looks closely and reveals wavy undulations on the surface. The surface is still sunken, must be inferior products. Good coating is wear-resisting, the sample that the businessman puts out in the store is wiped everyday, the surface of good product basically does not see to have Nick, and the product surface that is inferior to can have thickly and thickly scratched.
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Good quality High efficiency ~ left hand drill bits & HF drill bit
- Ref Price:
-
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 100 pc
- Supply Capability:
- 100000 pc/month
OKorder Service Pledge
OKorder Financial Service
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