Drill Bit Straight Shank Alloy Twist Drill Bit

• Customization: Available
• Types: Drill Bit
• Material: High Carbon Steel
• Model NO.: 1-1
• Function: Punching
• Brand: Huilin
• Performance: Twisting
• Shaft Style: Straight
• Structure: Box Joint
• Application Age: Adult
• Use Place: Building Decoration
• Size: Mini
• Whether to Support Customization: Support
• Surface Treatment: Whitewash
• Type: Twist Drill
• After-Sales: Three Months
• Transport Package: Container
• Specification: 1-100
• Trademark: Huilin
• Origin: Handan, Hebei
• HS Code: 0101101010
• Production Capacity: 50000

Product Description

The following is a description of Fried Dough Twists bits:

Structural composition

• Handle: Used for clamping and transmitting torque, there are two forms: straight handle and tapered handle. The straight handle is clamped in the drill chuck, and the tapered handle is inserted into the taper hole of the machine tool spindle or tailstock.

Neck: located between the handle and the working part, usually used to indicate the specifications, materials, and other information of the drill bit.

• Work section: including cutting section and guiding section. The cutting part has two main cutting edges, two auxiliary cutting edges, and one transverse edge, responsible for all cutting work; The spiral groove of the guiding part forms the front cutting surface, which plays a role in guiding, grinding, chip removal, chip holding, and allowing cutting fluid to flow in.

geometrical parameter

Spiral angle: generally ranging from 25 ° to 32 °, it mainly affects the size of the rake angle, blade strength, and chip removal performance of the cutting edge. Increasing the spiral angle results in lighter cutting and easier chip removal, but it weakens the strength of the cutting edge and the rigidity of the drill bit.

• Top angle: the top angle of the cutting part of the standard ordinary Fried Dough Twists drill is 118 °. The size of the top angle affects the chip thickness. Large angles are suitable for hard materials, while small angles are suitable for soft materials.

Cross cutting angle: generally between 40 ° and 60 °, the smaller the angle, the more beneficial it is to reduce cutting resistance.

Front angle: It is large at the outer edge and gradually decreases towards the middle. The transverse edge has a negative front angle, which can reach about -55 ° and has a squeezing effect during drilling.

Rear angle: generally 8 ° -20 °, mainly controlling cutting resistance and machining surface quality.

Material type

• High speed steel Fried Dough Twists drill: for example, M35 is suitable for drilling various metal, wood, plastic and other soft materials; 6542 is suitable for drilling low to medium hardness metals and wood; 9341 and 4241 are suitable for drilling ordinary metals and wood.

• Cobalt containing high-speed steel Fried Dough Twists drill: suitable for drilling various metals and some materials with high hardness.

• Integral carbide Fried Dough Twists drill: It is suitable for drilling a variety of metal materials and non-metallic materials such as plastic and wood, with high hardness, good wear resistance and high cost.

Characteristics and Application

• Features: The chip storage groove is spiral shaped, ensuring smooth chip discharge; Sharp cutting edge, high cutting efficiency; Simple structure, easy to manufacture and grind.

Application: It is the most widely used hole machining tool, which can be used for drilling metal materials such as steel, cast steel, alloys, non alloy steel, gray cast iron, malleable cast iron, and can also be used for processing non-metallic materials such as graphite. It is widely used in mechanical manufacturing, automotive maintenance, building decoration and other fields.