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Makita High-Speed Steel Step Drill Bit, 4 to 20 mm, Hex Shank, Tin Coated D-40185
Specifications
| Country of Origin | China |
|---|---|
| Brand | Makita |
| Material | HSS |
| Model | D-40185 |
| Finish | Tin Coated |
| Shank Type | Hex |
| Shank Size | 0.25in |
| Drill Diameter | 4 to 20 mm |
Key Features
- High-speed steel material ensures durability and extended sharpness.
- Step design covers 4 to 20 mm diameters in nine distinct steps for flexible hole making.
- Hex shank allows secure grip and compatibility with standard drills including electric, cordless, and impact types.
- Tin coating reduces friction and improves cutting efficiency in metal and hard materials.
- Designed for clean, precise holes in metal, sheet, and fabrication applications.
- Suitable for automation, automotive repair, and industrial fabrication tasks.
- 75 mm overall length and 53 mm working length fit most tooling and workstations.
- Consistent performance in pilot hole creation and enlargement.
Product Description
The Makita D-40185 step drill bit is engineered for high-performance hole making in a wide range of professional and industrial environments. Manufactured from high-speed steel (HSS) and finished with a titanium nitride (Tin) coating, this step bit provides exceptional durability and efficiency over extended use. Its nine-step configuration enables seamless transitions between sizes from 4 mm to 20 mm, simplifying tasks that require multiple hole diameters within a single project.
With a hex shank for reliable fitment, the D-40185 is compatible with electric, cordless, and impact drills. The bit's Tin coating significantly reduces heat build-up, minimizes friction, and extends tool lifespan, particularly when working with metals and harder substrates. Each step is precision-shaped to deliver clean, burr-free holes, aiding in automation projects, automotive repairs, and metal fabrications.
Applications include industrial sheet metal drilling, fabrication, pilot hole creation, and automation systems where variable hole sizes are essential. The Makita D-40185 is particularly effective for tasks in construction, manufacturing, and maintenance workshops.
High-speed steel construction for enhanced durability. Nine-step design covers sizes from 4 mm up to 20 mm. Hex shank improves tool holding security and drill compatibility. Tin coating ensures efficient cutting and longer bit life.
Ideal for industrial, automotive, and manufacturing environments. Suitable for automation, sheet metal fabrication, and repair projects. Designed to deliver smooth transitions between hole sizes on metal and other hard materials.
Overall length of 75 mm and working length of 53 mm adapts to most workplace needs.
This drill bit is a practical choice for engineers, technicians, and workshop professionals who require reliable and precise step drilling. Browse more specialist Drill Bit solutions in the EnvMart industrial tools category or discover Makita's full bit range for advanced machining needs.
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Frequently Asked Questions
The Makita D-40185 step drill bit covers a diameter range from 4 mm to 20 mm across nine distinct steps.
It is constructed from high-speed steel (HSS), which ensures durability and extended sharpness during use.
This model features a hex shank, which allows for a secure grip and compatibility with various drill types including electric, cordless, and impact drills.
The tin coating reduces friction and improves cutting efficiency, particularly when drilling through metal and hard materials, while also extending the lifespan of the bit.
The overall length of this step drill bit is 75 mm, with a working length of 53 mm.
It is designed for clean and precise hole making in applications such as industrial sheet metal drilling, automotive repair, and metal fabrication.
The D-40185 features a nine-step design that allows for seamless transitions between different hole sizes.
Yes, it is particularly effective for automation projects where variable hole sizes are essential.
The shank size of this model is 0.25 inches, which fits standard drill chucks.
Yes, the hex shank design allows it to be compatible with impact drills as well as electric and cordless drills.
The step design allows for flexible hole making across multiple diameters, simplifying tasks that require various hole sizes within a single project.
This drill bit is manufactured in China.
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