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Twist Drills for Mild Steel and Stainless Steel

Twist Drills for Mild Steel and Stainless Steel

 •  First choice for drilling soft steel and stainless steel.
 •  Sharp cutting edge, avoids the formation of built-up edge, suitable for high-performance drilling.
 •  Straight shank/bevel shank type, internal/external cooling type optional.

  • Twist Drills for Mild Steel and Stainless Steel
  • Twist Drills for Mild Steel and Stainless Steel
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NNZB Series Fried Dough Twists Drill (Internal Cooling Type)(3D/5D)

Processed Materials Mild Steel
HB≤180		 Carbon Steel, Alloy Steel
~30HRC		 Stainless Steel
Austenitic Series Martensitic Series Ferrite Series
Cutting Speed 80~150m/min 80~150m/min 40-80 m/min 50-100 m/min 60~120 m/min
Diameter
(mm)		 Rotational Speed
(min-1)		 Feed Rate
(mm/r)		 Rotational Speed
(min-1)		 Feed Rate
(mm/r)		 Rotational Speed
(min-1)		 Feed Rate
(mm/r)		 Rotational Speed
(min-1)		 Feed Rate
(mm/r)		 Rotational Speed
(min-1)		 Feed Rate
(mm/r)
3 12700 0.09~0.12 12700 0.09~0.12 6300 0.03~0.07 7400 0.03~0.07 9000 0.03~0.07
4 9600 0.10~0.15 9600 0.10~0.15 4700 0.04~0.08 5600 0.04~0.08 6700 0.04~0.08
5 7600 0.12~0.18 7600 0.12~0.18 3800 0.05~0.10 4500 0.05~0.10 5400 0.05~0.10
6 6400 0.14~0.20 6400 0.14~0.20 3200 0.06~0.12 3700 0.06~0.12 4500 0.06~0.12
8 4800 0.16~0.24 4800 0.16~0.24 2400 0.08~0.16 2800 0.08~0.16 3400 0.08~0.16
10 3800 0.18~0.27 3800 0.18~0.27 1900 0.10~0.18 2200 0.10~0.18 2700 0.10~0.18
12 3200 0.20~0.30 3200 0.20~0.30 1600 0.12~0.20 1900 0.12~0.20 2300 0.12~0.20
14 2700 022~0.35 2700 0.22~0.35 1350 0.13~0.22 1600 0.13~0.22 1900 0.13~0.22
16 2400 0.25~0.36 2400 0.25~0.36 1200 0.14~0.25 1400 0.14~0.25 1700 0.14~0.25
18 2100 0.28~0.38 2100 0.28~0.38 1050 0.15~0.28 1200 0.15~0.28 1500 0.15~0.28
20 1900 0.30~0.40 1900 0.30~0.40 950 0.16~0.30 1100 0.16~0.30 1350 0.16~0.30

1. When using this tool for the first time, test cutting at 90% of the cutting speed or 85% of the feed rate according to the above data. When the cutting condition is stable, increase the cutting speed and feed rate one by one.
2. This standard cutting condition table is applicable to water-soluble cutting fluids.
3. When installing the cutting tool, please use a defect free and clean chuck, and control the radial runout of the drill bit within 0.02mm.
4. The cutting conditions in this table are applicable to situations where the hole depth is below 5D.

About us
Changzhou Maton Tools Co.,Ltd.
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Changzhou Maton Tools Co.,Ltd.

Changzhou Maton Tools Co.,Ltd.is located in the economically developed Yangtze River Delta region.The factory is located in XixiashuHigh-tech Development Zone,a well-known tool town in China. We are Internal Coolant Drill Manufacturers.
Magotantools take the ISO9001 quality system as the standard,under the guidanceof the business philosophy of"zero defect in products"and"zero distance in service",based on the spirit of"integrity","unity"and"exploita- tion",and follow a fair and just company style for management.Product production adopts five-axisand six-axis CNC grinding and machining centers from Germany,Switzerland,Japan,etc.,and is equipped with high-precision testing equipment such as Germany,Japan,and China,so as to meet the needs of production with high quality and quantity.
The company continuously develops various high-performance CNC tools, and has won various national awards. Professional External Coolant Drill Suppliers. More than 10 patents,the company's products are mainly used in the defense industry, aerospace industry,automotive industry,electronic products and molds and other fields.
The company's various products are recognized and favored by well-known domestic companies.With infinite technology,infinite creation,and pursuit of excellence,Magotan tools will write future prosperity and dreams with more extraordinary confidence and high-quality quality.

FAQ
  • After we send you the inquiry, how long will it take to receive a response?

    We will reply to you within 12 hours after receiving the inquiry on weekdays.

  • Are you a direct manufacturer or a trading company?

    We are manufacturers, we produce and sell ourselves.

  • What products can you offer?

    We mainly produce tungsten steel milling cutters, drill bits and other hard alloy tools. Professional Internal Coolant Drill Manufacturers.

  • What are the main application areas involved in your product?

    Our products cover almost the entire mold industry, defense industry, aerospace industry, automotive industry, electronic products and other fields.

  • Can you make customized products?

    Yes, our main focus is on customized products. We develop and produce products based on the drawings or samples provided by customers. Custom Internal/External Cooling Twist Drills.

  • What is the production capacity of your company?

    We have over 30 units of WALTER from Germany, Makino from Japan, ROLLMATIC from Switzerland, and TTB from Switzerland, with an annual output value of 80 million RMB. We are External Coolant Drill Suppliers

  • How does your company ensure product quality?

    Firstly, after each process, we conduct corresponding inspections. For the final product, we will conduct 100% full inspection according to customer requirements and international standards;
    Then, we have the advanced and complete top-notch testing equipment in the industry, such as spectral analyzers, metallographic microscopes, etc., which can ensure the stability and consistency of cutting tools, while meeting customers' high-precision testing requirements for cutting tools.

  • What is the payment method?

    When quoting, we will confirm with you the transaction method, FOB, CIF, CNF or other options. When producing in bulk, we usually make a 30% advance payment first, and then pay the remaining balance upon presentation of the bill of lading. We mostly use T/T as the payment method, but L/C is also acceptable.

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