1. Product Overview

Achieve flawless door hardware installation with our Professional 35mm Spherical Door Drill Bit. Specifically engineered for creating clean, flat-bottomed holes, this tool is the industry standard for installing spherical (ball-type) door locks. Crafted from premium High Carbon Steel (HCS), it offers the perfect balance of edge sharpness and structural toughness required for both softwoods and dense hardwoods used in modern interior design.

Whether you are a professional contractor in Europe or a high-volume hardware supplier in the Middle East, this bit delivers the precision required for high-stakes woodworking.

2. Technical Specifications Table

Precision-machined to ensure 100% concentricity, reducing vibration and preventing wood splintering.

3. Engineering Excellence & Key Advantages

Precision Centering Point

The bit features an ultra-sharp Center Spur that bites into the wood instantly. This prevents the bit from "wandering" across the door surface, ensuring the lock hole is positioned exactly where you marked it—critical for the alignment of the latch and strike plate.

Quick-Change Hex Shank System

Designed for the modern job site, the 6.35mm Hex Shank provides a secure, non-slip fit in all standard drill chucks and impact drivers. This allows for rapid switching between drilling the main cylinder hole and the latch pilot hole, significantly increasing installation speed.

Dual-Wing "Clean-Cut" Geometry

The cutting head is equipped with two precision-ground wings that shear wood fibers before the main waste is removed. This results in an "Exit-Clean" hole with zero splintering, even on delicate veneers or laminated door surfaces.

High Carbon Steel Durability

Our specialized HCS undergoes a vacuum-tempering process to achieve optimal hardness. This ensures the cutting edges stay sharp for hundreds of cycles, even when drilling abrasive materials like MDF or resin-heavy tropical hardwoods.

4. Professional Applications

• Spherical Lock Installation: The 35mm diameter is the precise fit for the vast majority of international ball-style door locks.

• Cabinet Making: Ideal for large-diameter hinge boring and decorative woodwork.

• Furniture Assembly: Clean flat-bottomed holes for concealed joints and hardware.

5. Packaging & Logistics

• Retail Ready: Individual color-coded blister cards or transparent plastic tubes with EAN/UPC barcodes.

• Wholesale Solutions: Bulk moisture-proof inner boxes (10–20 pcs) and reinforced export cartons.

• OEM Marking: High-precision Laser Marking for brand logos and size specifications directly on the hex shank.

6. FAQ (Frequently Asked Questions)

Q: Why use a 35mm bit instead of a standard hole saw?

A: A 35mm wood bit creates a smoother, flat-bottomed hole with significantly less vibration than a hole saw. It also provides better control when drilling into the edge of a door for the latch mechanism.

Q: Can this bit be used in an impact driver?

A: Yes. The 1/4" Hex Shank is specifically designed to be compatible with both standard drill chucks and quick-release impact drivers.

Q: Is this bit suitable for hardwood doors found in the Middle East and Russia?

A: Absolutely. The High Carbon Steel construction is tempered to handle dense hardwoods. We recommend a steady RPM and clearing the chips frequently for the best results in extremely hard timber.