MANUFACTURER VARIES 21ML18 Countersink Deg Hss 190735767047

( Brand: Manufacturer Varies ), ( Type: Cutting Tools ), ( Material: High Speed Steel ), ( Application: For Cast Iron, Heat-treated Stee ), ( Manufacturer Part Number: 21ML18 ), ( Item Length: 0.070 ), ( Item Width: 0.026 ), ( Country Of Origin: China ), ( UPC: 190735767047 )

Review MANUFACTURER VARIES Countersink Fl Deg In Hss

Introducing our 21mm x 18 countersink flat bottom milling cutter, a versatile and high-performing tool designed for various metalworking applications. This cutter features a 82-degree helix symmetric design, ensuring efficient chip removal and superior cutting performance. The flat bottom design of the cutting edges allows for easy engagement with the workpiece, making it ideal for countersinking or pocketing operations.

The cutter is made of premium High-Speed Steel (HSS), known for its exceptional strength and durability. This material enables the tool to maintain its sharpness for extended periods, reducing the need for frequent sharpening and ensuring consistent performance. Furthermore, HSS can effectively withstand high temperatures generated during cutting, making it an excellent choice for heavy-duty metalworking tasks.

The 21mm outside diameter of the cutter provides ample clearance for larger drill bits and other tools, allowing for efficient sequencing of operations. The 18-tooth design of the helical flutes facilitates smooth chip evacuation, minimizing tool wear and reducing the likelihood of clogging. The countersink geometry of the cutting edges enables the creation of clean, uniform recesses for screw heads, ensuring a professional finish to your projects.

In conclusion, our 21mm x 18 countersink flat bottom milling cutter is an essential addition to any metalworking toolbox. Its 82-degree helix symmetric design, flat bottom geometry, and HSS construction ensure superior cutting performance, chip evacuation, and durability. Suitable for a wide range of applications, this cutter will help you complete your projects efficiently and effectively.

Countersinks with a 21mm outer diameter and an included angle of 82 degrees, made of high-speed steel (HSS), are commonly used in metalworking and construction projects for creating pilot holes with countersunk heads for screws or bolts. Let's discuss the pros and cons of purchasing such a countersink.

1. Durability: HSS is known for its superior strength and durability, making it an ideal choice for heavy-duty applications.

2. Versatility: The 82-degree included angle allows for a wide range of applications, accommodating various screw head sizes and types.

3. Consistent Depth: Using a countersink ensures consistent depth for the countersunk area, which is essential for proper screw or bolt seating and uniform appearance.

4. Time-Saving: Using a countersink eliminates the need for manually countersinking each hole, saving time and effort, especially when dealing with multiple holes.

1. Cost: HSS countersinks are generally more expensive compared to their high-carbon steel counterparts due to their superior strength and durability.

2. Requires Sharpening: HSS countersinks need to be sharpened more frequently than high-carbon steel countersinks, which can add to the overall cost and maintenance requirements.

3. Precision: Achieving accurate depth and consistency may be challenging for beginners or inexperienced users, potentially resulting in misaligned or uneven countersinks.

The decision to buy a 21mm, 82-degree HSS countersink ultimately depends on the specific requirements of your project. If you're working on heavy-duty applications, the durability and versatility of HSS countersinks make them an excellent investment. However, if you're on a tight budget or only require countersinks for occasional use, a high-carbon steel alternative may be a more cost-effective option.

For professional or heavy-duty projects, investing in a high-quality, 21mm, 82-degree HSS countersink is recommended. For occasional use or budget-conscious projects, consider purchasing a high-carbon steel countersink with a similar included angle. Always ensure proper sharpening and maintenance for optimal performance.

part # 21ml18 price

• $35.83

specifications drillnubbin:

• brand: Manufacturer Varies
• type: Cutting Tools
• material: High Speed Steel
• application: For Cast Iron, Heat-treated Stee
• manufacturer part number: 21ML18
• item length: 0.070
• item width: 0.026
• country of origin: China
• upc: 190735767047

shipping drillnubbin:

• transit: 3-5 Days
• class: Standard
• service: UPS Ground
• cost: $0.00
• type: Fixed
• carrier: UPS

payments drillnubbin:

• credit card: Mastercard
• wallet: Paypal
• other

general drillnubbin:

• condition: New
• Tools Workshop Equipment > Power Tool Air Tool Accessories > Drill Bits

offer drillnubbin:

• quantity: 47
• started: May 10, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home

returns drillnubbin:

• time: 30 Days
• method: Money back
• policy: Returns Accepted
• paid by: Buyer

seller drillnubbin:

• # reviews: 154221
• rating: 99.6%

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