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Makita High Speed Steel Drill Bit with Hex Shank 0.25in, Diameter 4-20 mm D-40157
Specifications
| Country of Origin | China |
|---|---|
| Brand | Makita |
| Material | High Speed Steel |
| Model | D-40157 |
| Shank Type | Hex |
| Shank Size | 0.25in |
| Drill Diameter | 4-20 mm |
Key Features
- Conical step design offers nine drilling diameters from 4 mm up to 20 mm for multiple hole sizes.
- Manufactured from durable high speed steel (HSS) for enhanced hardness and wear resistance.
- Hex shank of 0.25 inch ensures secure and compatible fitting with standard drill chucks.
- Spiral flute geometry optimizes chip clearance and efficient material removal during drilling.
- Ideal for drilling and enlarging holes in thin sheet metals and softer metal materials.
- Widely used in automotive, electronics, and mechanical assembly industries requiring precise hole sizing.
- Designed to reduce tool changes by providing multiple hole diameters in a single bit.
Product Description
Makita D-40157 is a high speed steel (HSS) specialist drill bit designed with a hex shank size of 0.25 inch and an adjustable diameter range from 4 mm to 20 mm. This drill bit features nine stepped diameters allowing users to create various hole sizes with a single tool, making it highly versatile for industrial and precision drilling tasks.
The conical design combined with spiral flutes facilitates efficient chip removal, enabling cleaner holes and preventing clogging during operation. Constructed from high speed steel, the bit offers excellent hardness and durability for drilling softer metals and thin sheet materials commonly encountered in mechanical, automotive, and electronic component assembly.
This drill bit is particularly suitable for enlarging pre-existing holes and provides consistent accuracy in hole diameter, improving productivity by minimizing drill changes. The 1/4 inch hex shank ensures firm grip and compatibility with a wide range of standard power drills and drivers.
Applications include use in manufacturing plants, automotive repair and assembly, electronics production, and general mechanical workshops where precise, multi-diameter drilling is required. The bit’s design supports long tool life and reliable performance in professional environments.
Conical step drill bit allows nine different hole sizes from 4 mm to 20 mm. Durable high speed steel construction ensures long-lasting sharpness. Hex shank enables secure chuck fitting for improved operational safety. Spiral flute design promotes effective chip removal and cleaner holes.
Perfectly suited for drilling thin metals, electronics assembly, and automotive use. Reduces the need for multiple drill bits, enhancing work efficiency. Explore more specialist Drill Bits and power tool accessories in EnvMart's Industrial Tools & Equipment category for professional-grade solutions.
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Frequently Asked Questions
This model features a diameter range from 4 mm to 20 mm, allowing for versatile drilling options with a single tool.
It is constructed from high speed steel (HSS), which provides enhanced hardness and wear resistance.
The drill bit has a hex shank type with a size of 0.25 inches, ensuring compatibility with standard drill chucks.
The conical step design allows for nine different hole sizes, ranging from 4 mm to 20 mm.
The spiral flute geometry optimizes chip clearance and promotes efficient material removal during drilling, resulting in cleaner holes.
It is widely used in automotive, electronics, and mechanical assembly industries that require precise hole sizing.
Yes, it is particularly suitable for enlarging pre-existing holes while providing consistent accuracy in hole diameter.
It is ideal for drilling and enlarging holes in thin sheet metals and softer metal materials.
The design reduces the need for multiple drill bits by providing multiple hole diameters in a single tool, enhancing work efficiency.
The drill bit is manufactured in China.
It is designed for use in manufacturing plants, automotive repair and assembly, electronics production, and general mechanical workshops.
This drill bit is identified as the Makita D-40157 model.
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