For accurate, clean holes in wood, these 1-5/16 inch drill bits are designed to deliver smooth cuts with minimal tear-out. This guide helps buyers choose the right bit for hinge mortises, deep pocket holes, and cabinetry tasks. Best for DIY enthusiasts, hobbyists, and professionals who need clean, reproducible results in hardwoods and softwoods alike. The table below highlights five strong options to compare at a glance.
| Product | Diameter | Shank | Best For |
|---|---|---|---|
| Forstner Bit A | 1-5/16″ | 1/4″ Hex | Clean hinge mortises |
| Forstner Bit B | 1-5/16″ | 2/5″ Round | Soft & hard woods |
| Forstner Bit C | 1-5/16″ | 2/5″ Hex | Deep pocket holes |
| Forstner Bit D | 1-5/16″ | Hex | Professional hinge work |
| Hole Saw E | 34mm | 10mm Arbor | Thicker materials & cutouts |
1-5/16″ Forstner Drill Bit with 1/4″ Quick Change Hex Shank
Size: Drilling diameter 1-5/16″ (33.5 mm). Hex shank diameter 1/4″ (6.35 mm). Total length 3-3/5″ (92 mm). Features C2 carbide tipped cutters for ultra-sharp edges and clean cuts. Solid hardened steel body enhances structural strength. The 3-flute design minimizes wobble and burning in both hard and soft woods, delivering smoother operation and longer life than two-blade designs. Best for precise mortises and shallow to medium-depth holes in cabinetry and furniture work.
Best for: Woodworkers who prioritize clean, burr-free holes and quick-change convenience. Choose this if you value a compact hex shank that reduces bit slippage in light to medium-duty tasks. Caution: carbide tips require careful handling to avoid chipping on extremely hard or knotty wood.
1-5/16″ | 33mm Forstner Drill Bit, Triple Flute Tungsten Carbide Tipped
Size: Drilling diameter 1-5/16″ (33 mm). Round shank diameter 2/5″ (10 mm). Total length 3-3/5″ (92 mm). Carbide tipped cutters provide long-lasting sharpness and cleaner cuts. Built with hardened steel for strength. The 3-flute design reduces heat build-up, supports smoother cuts in hard woods, and improves durability versus two-flute designs. Best for demanding woodworking where repeatable hole quality matters.
Best for: Professionals seeking longevity and consistent results in hardwoods and plywood. Choose this if deep-pocket holes with reliable stability are required. Caution: Shank is larger than some drill chucks and may not fit every drill; verify chuck compatibility before purchase.
1-5/16″ | 33.3mm Triple Flute Tungsten Carbide Forstner Drill Bit (Hex)
Brand: REKCKRUL Store. Size: Drilling diameter 1-5/16″ (33.3 mm). Hex shank for anti-slip grip. Carbide tipped blades ensure razor-sharp performance with heat-treated steel bodies, offering longer life than carbon steel bits. Specifically designed for hinge mortising, cabinet hardware, and deep pocketing, with a claimed service-life advantage over traditional two-edged blades. Best for: High-precision woodworking where bit stability and long life are priorities. Caution: The hex shank may require a compatible chuck to fully utilize the anti-slip feature.
Mollom 34mm (1-5/16″) HSS M42 8% Cobalt BI-Metal Hole Saw
Dimension: Cutting diameter 34 mm (1-5/16″), shank diameter 10 mm (3/8″), hole saw depth 38 mm (1-1/2″). Made with M42 high-speed steel cobalt for extended life. Rust and corrosion resistant. Center drill is titanium-plated for added strength. Suitable for thick wood, plywood, plastic, drywall, and lightweight metals. Best for: Projects requiring larger hole sizes through moderately thick materials. Caution: Hole saws cut in a periphery fashion and may require backing support to prevent tear-out on brittle substrates.
Buying Guide
What should I consider before buying a 1-5/16 inch bit?
Key factors include bit type (Forstner vs. hole saw), material (carbide vs. HSS), shank type, and depth capability. For precision mortises and clean flat bottoms, Forstner bits with carbide tips excel. For large diameter cuts or through-holes, hole saws are more practical, though they may require more backing support.
Should I choose carbide-tipped or HSS?
Carbide-tipped bits stay sharper longer and resist wear, especially in hardwoods. HSS bits are more flexible and less brittle but may dull faster under heavy use. For demanding professional work, carbide typically offers better longevity and cut quality.
What’s the difference between hex and round shanks?
Hex shanks reduce bit slippage and improve grip in quick-change chucks, making them convenient for repeated tasks. Round shanks are widely compatible but may slip in cheaper chucks without a collet.
When is a hole saw preferred over a Forstner bit?
Hole saws are ideal for larger diameters and thicker materials where a single, deep cut is required. For precise, flat-bottomed holes with clean edges, Forstner bits are typically superior.
How deep can these bits cut?
Depth varies by design. Some bits specify deep pocketing depths (often around 2-3/8″ to 3″) while standard Forstner bits cut shallower pockets. Always verify the stated depth for your model.
Maintenance tips
Keep carbide tips sharp with proper sharpening guidelines, avoid overheating by drilling at appropriate speeds, and wipe dust and resin after use. Store bits in a dry area to prevent corrosion.
Practical comparison at a glance
- Best for clean mortises: Forstner carbide-tipped bits with a 3-flute design.
- Best for deep pockets: Bits with longer overall length and robust shanks.
- Best for high longevity: Carbide-tipped bits with hardened steel bodies.
- Best for compatibility: Hex shank options when your drill chuck supports it.
FAQ
- Q: Are these bits compatible with cordless drills? A: Yes, most 1-5/16″ Forstner bits with hex or round shanks fit standard drills with appropriate chucks.
- Q: Which bit gives the cleanest edge? A: Carbide-tipped Forstner bits generally provide the cleanest edges, especially in hardwoods.
- Q: Can I use a Forstner bit for hinge mortises? A: Yes, several models are designed for hinge mortising and deep pocket work.
- Q: Do these bits require special maintenance? A: Regular cleaning and proper storage help prolong life; avoid overheating during use.
- Q: What is the best choice for beginners? A: Look for hex-shank carbide-tipped Forstner bits with a 1-5/16″ diameter and a forgiving cutting geometry.
- Q: Are there safety precautions I should follow? A: Use appropriate PPE, secure the workpiece, and feed slowly to maintain control and reduce tear-out.