Hss Extra Long Fully Ground Drilling Bits
- 1000000 Piece / Pieces per Month
- Shenzhen
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Product Details
Place of Origin: | Guangdong, China | Brand Name: | vikda or OEM | Model Number: | D Series |
Type: | Twist Drill Bit | Material: | High Speed Steel | Use: | Metal Drilling |
Product Description
Specifications
Hss Extra Long Fully Ground Drilling Bits1.Material:hss ,Cobalt 5 or Cobalt 8
2.Straight,taper Shank,
3.Din 338 standard
Hss Extra Long Fully Ground Drilling Bits
1)HSS straight shank drill bits.
2) HSS 4241 Material Drill Bits,M35 drill bits,m42 drill bits.
3) Lowest Prices.
- Hss Extra Long Fully Ground Drilling Bits
- Favorite of both the DIY and industrial markets
- The surface is Black oxide. Available in bright finish, titanium nitride,ticn etc.
- Hot roll-forged flute with special heat treatment gives additional toughness with increased durability of the drill bit.
- 118 degree point angle design for general purpose.
- Black oxide finish for greater resistance to wear.
- Economical high speed steel bit for general drilling.
- For drilling in steel, cast steel, malleable iron, sintered metal, non-ferrous metal and plastic, wood, plastic.
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
Test point of the drill diameter
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.
Point angle
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:
- Diameter;
- Material: (HSS, HSSCo);
- Name or mark of manufacturer.
- Additional and/or differing marking by agreement.
Web Thinning
- Without thinning
- Suitable for drill of general purpose.
- Thanks to thin web thickness, web thinning is not need.
- This without web thinning type is applied to design of drills for mild steel, alloy steels, cast iron, stainless steel, titanium, inconel, etc. and conventional cutting conditions.
- Type C thinning (DIN1412 FORM C, SPLIT POINT)
- Because split point enables good centering when drilling and breaks the chips, chip removals is easy.
- Suitable for drill design in high hardened tough materials, i.e, heat treated steel, titanium alloy, stainless steel, incoroy inconel, nimonic, etc.
NOTE:
- We can supply many kinds of drill bits, such as hss twist drill, masonry drill, wood working drill bit, etc
- Not all products are currently listed on our website. If you don't see the specific product you are looking for, please contact us for assistance.
Contact Us
- Shenzhen Victor Precision Technology Co., Ltd.
- Contact nameThomas Tan
- Phone86-755-33186833
- Address1F, Bldg #1, Bai Men Qian Industrial Park, Busha Road, Buji, Longgang District, Shenzhen,Guangdong
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