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Type: Switch Touch with 8mm Bit
Material: 45# Steel
Carbide Tip: YG8
Accuracy: +/ - .003" resistance
Body: Solid Solidified Steel
Sharp edge: Top notch carbide with modern grade miniature grain
Shaper: CNC ground for a mirror-like completion
For nitty gritty determinations, if it's not too much trouble, allude to the going with photographs.
The 8mm Adjustable Steel Countersink Bit is a precision-engineered tool designed to create perfectly flush or recessed screw holes in wood, plywood, and composite materials. Constructed from high-speed steel (HSS)—tempered for optimal hardness and toughness—and featuring an adjustable depth stop mechanism, it offers precise control over countersink depth (ranging from 2.5mm to 10.5mm). The 8mm shank fits standard drills, impact drivers, and drill presses, while its hex shank design prevents slipping during high-torque operations. This bit eliminates guesswork in hole preparation, making it indispensable for furniture assembly, cabinet installation, and DIY woodworking projects where clean, professional fastener placement is critical.
Parameter | Details |
Material | High-speed steel (HSS) with black oxide corrosion-resistant coating |
Bit Diameter | 8mm (0.312") for pilot holes compatible with #8–#10 wood screws |
Countersink Angle | 90° (industry standard for wood screws and flat-head fasteners) |
Adjustable Depth | 2.5–10.5mm (0.098–0.413") via precision-threaded collar with lock nut |
Shank Diameter | 8mm (compatible with standard drill chucks and impact drivers) |
Max RPM | 2,500 (optimized for controlled drilling to prevent material burning) |
Precision Depth Control: The threaded collar with lock nut allows incremental adjustments in 0.5mm increments, ensuring screws sit perfectly flush or recessed for wood filler coverage.
Multi-Material Performance: Drills clean countersinks in hardwoods (oak, walnut), softwoods (pine, cedar), and composites (MDF, particleboard) without splitting or splintering.
Durable Construction: Black oxide coating provides 3x better corrosion resistance than uncoated HSS, extending tool life in humid workshop environments.
Hex Shank Security: The 8mm hex shank design prevents slippage in drill chucks during high-torque countersinking, reducing the risk of workpiece damage.
Replaceable Pilot Tip: A hardened steel pilot tip ensures consistent hole alignment; replacement tips are available for extended tool longevity.
Furniture Assembly: Creates countersinks for securing table legs, chair rails, and bed frames with flat-head wood screws.
Cabinet Installation: Prepares holes for hinge screws, drawer slide mounting hardware, and face frame fasteners.
Deck & Outdoor Projects: Countersinks screws in composite deck boards, cedar fencing, and pressure-treated lumber for weather-resistant finishes.
DIY Woodworking: Essential for building bookshelves, workbenches, and storage cabinets where fastener visibility is a concern.
Q: Can this bit countersink through metal fasteners or hardware?
A: No. It is designed exclusively for wood and soft composites. For metal, use a carbide-tipped countersink bit with a reduced RPM (500–1,000).
Q: How do I calibrate the depth stop for consistent results?
A: Loosen the lock nut, slide the collar to the desired depth (marked on the shank), tighten the nut, and test on scrap material of the same thickness as your workpiece.
Q: Why is a lower RPM recommended for softwoods?
A: Softwoods (like pine) have less density, so higher RPM can cause friction-induced burning. Reducing speed to 1,000–1,500 RPM prevents charring while maintaining cutting efficiency.
Note:
If it's not too much trouble, consider a 1-3mm contrast because of manual estimating.
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SKU | SIZE | N.W./kgs | PACKAGE | PACKAGE/MM |
C08339C0828O | 8*8*2.8 | 0.075 | Tube | 81*34*34 |
C08339C0830O | 8*8*3.0 | 0.073 | Tube | 81*34*34 |
C08339C0832O | 8*8*3.2 | 0.076 | Tube | 81*34*34 |
C08339C0835O | 8*8*3.5 | 0.078 | Tube | 81*34*34 |
C08339C0840O | 8*8*4.0 | 0.077 | Tube | 81*34*34 |
C08339C08T5AO | 5pcs set 8*8 | 0.379 | Tube+PVC bag | 130*205*35 |
C08339C1028O | 8*10*2.8 | 0.075 | Tube | 81*34*34 |
C08339C1030O | 8*10*3.0 | 0.073 | Tube | 81*34*34 |
C08339C1032O | 8*10*3.2 | 0.076 | Tube | 81*34*34 |
C08339C1035O | 8*10*3.5 | 0.078 | Tube | 81*34*34 |
C08339C1040O | 8*10*4.0 | 0.077 | Tube | 81*34*34 |
C08339C10T5AO | 5pcs set 8*10 | 0.379 | Tube+PVC bag | 130*205*35 |
Router Bits Shank: 3mm, 6mm, 8mm, 12mm, 1/4”(6.35mm), 1/2” (12.7mm)
European and American countries such as the United States, the United Kingdom, and France; Mainly using 1/4” and 1/2” shank;
Russia, Ukraine, Poland, Germany, Spain, Pakistan, and other countries mainly use 6mm, 8mm, and 12mm shank
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1. It is recommended to use tools with a larger handle diameter and shorter cutting edge. Excessive blade length can cause vibration and deviation.
2. Cutting tools can only be used for wood processing and cannot be used for non-metallic processing of wood materials such as metal and stone.
3. If the tool jumps, stop working immediately, reinstall and clamp it until it is fully in contact before resuming work.
4. The handle of the cutting tool must be fully inserted into the jacket and tightened firmly, otherwise it is easy to cause the handle to break.
5. During operation, safety measures such as glasses, ear protection devices, face shields, gloves, etc. must be provided.
