Designed for precision hole positioning, pilot spotting, and controlled hole-entry preparation, this 120° carbide spot drill combines a short rigid cutting structure, imported MG grade 0.8 μm carbide, symmetrical point geometry, controlled edge preparation, and material-specific coating options. It helps reduce drill walking, improve subsequent drill guidance, and produce consistent chamfers or shallow countersinks in CNC machining applications.
The 120° carbide spot drill is designed to create a precise starting point before a standard drill, carbide drill, or deep-hole drill enters the workpiece.
When a drill begins directly on a flat, inclined, curved, or uneven surface, the drill point may move away from the intended position before the cutting edges become fully engaged. This drill walking can affect hole-location accuracy, increase lateral cutting load, and reduce the stability of the following drilling operation.
The short and rigid structure of a solid carbide spot drill helps establish an accurate starting feature with lower deflection. Its symmetrical 120° point geometry creates a controlled conical guide that supports more stable entry for the subsequent drill.
A 120° spot drill is particularly suitable for use with many conventional drills and carbide drills that have point angles close to 118°–120°. The final spotting angle and spotting depth should still be matched to the following drill geometry, workpiece material, and hole-quality requirements.
In addition to hole positioning, the tool can also be used for shallow chamfering, light countersinking, hole-edge preparation, and burr removal when the required angle matches the 120° geometry.
This spot drill is manufactured from imported MG grade 0.8 μm tungsten carbide with 10% cobalt content. German Walter 5-axis grinding, controlled edge preparation, Walter Helicheck Plus measurement, and 300x cutting-edge inspection help maintain point symmetry, cutting-edge consistency, and reliable positioning performance.
| Item | Description | Item | Description |
|---|---|---|---|
| Product Name | 120° Carbide Spot Drill | Alternative Name | 120 Degree Carbide Spot Drill / Solid Carbide Spotting Drill |
| Drill Type | Solid Carbide Spot Drill | Point Angle | 120° Included Angle |
| Cutting Structure | Short and rigid two-flute spotting geometry | Carbide Material | Tungsten Carbide |
| Cutting Design | Center-cutting symmetrical point | Coating | Custom Coating |
| Inspection Equipment | German Walter Helicheck Plus | Workpiece Material | Steel, stainless steel, cast iron, aluminum, titanium alloy, and selected non-ferrous materials |
| Coolant Type | Internal Coolant / External Coolant Available | Main Application | Preparing accurate starting points before standard, carbide, or deep-hole drilling |
| Service | Regrinding and Customization Available | Size Availability | Standard and customized diameters available |
Key Features
The 120° point geometry creates a controlled conical starting feature before the following drill enters the workpiece.
Consistent point symmetry helps keep the spotting feature aligned with the spindle center and supports more stable drill guidance.
Compared with a standard-length drill, the spot drill uses a shorter cutting section and reduced overhang.
The rigid structure helps reduce tool deflection, drill walking, and positional movement during the initial contact with the workpiece.
The tool is manufactured from imported MG grade 0.8 μm tungsten carbide with 10% cobalt content.
The fine carbide structure helps provide rigidity, edge strength, wear resistance, and dimensional stability during repetitive spotting and chamfering operations.
Point honing and controlled edge preparation help improve cutting-edge consistency and reduce micro-chipping.
Balanced edge preparation is especially important because both cutting edges must engage evenly to produce an accurate and symmetrical spotting feature.
The 120° carbide spot drill is suitable for CNC machining centers, automatic lathes, drilling machines, transfer lines, and precision component manufacturing. It is particularly useful when accurate starting position, controlled hole entry, chamfer consistency, and stable batch performance are required.
Send us your material and hole requirements. Our team will recommend the right drill solution.
Landun CNC Tool is a carbide drill manufacturer focused on precision solid carbide drills and custom carbide drill solutions, supported by advanced grinding, strict inspection, and consistent edge preparation.
Production Facility
Geometry Accuracy Control
Edge Inspection Magnification
Edge Passivation Control
Our carbide drills are ground on German WALTER 5-axis grinding machines for sharp cutting edges, stable accuracy, and smooth drilling performance.
We use WALTER HELICHECK PLUS for contour inspection, keeping profile and radius control within 3 μm for reliable geometric precision.
Each carbide drill is inspected at 300x magnification to check edge quality and avoid chipping or saw-tooth defects before shipment.
Manual drill point honing and automatic rubber-bonded diamond abrasive polishing help improve tool life and control edge consistency within ±0.003 mm.
Common Questions
A 120° carbide spot drill is a short, rigid solid carbide tool used to create an accurate starting feature before a standard drill or carbide drill enters the workpiece.
Its main purpose is to reduce drill walking and improve hole-position accuracy by creating a controlled guide feature for the following drill.
The main advantage is that several related hole features can be machined with one tool. This reduces tool changes, shortens cycle time, simplifies programming, and improves concentricity between hole diameters.
The 120° point angle is suitable for positioning before many conventional drills and carbide drills with point angles near 118°–120°. The final angle should be matched to the following drill and application.
Yes. A 120° spotting angle can be used before many 118° drills. The spotting diameter and depth should be controlled so that the following drill enters correctly without unnecessary edge loading.
It may not be the best choice for every 140° drill. A spot drill angle equal to or appropriately matched with the following drill angle should be selected after reviewing the drill geometry and application.
A spot drill is primarily designed to create an accurate starting feature for drilling. A traditional center drill is mainly designed to produce center holes for lathe-center support and usually has a different multi-diameter geometry.
It is intended mainly for spotting, shallow chamfering, and hole-entry preparation. It should not normally be used as a replacement for a standard drill in deep-hole machining.
The spotting depth should provide sufficient guidance without creating excessive contact or loading for the following drill. It depends on the spot drill diameter, following drill diameter, point angles, and required chamfer.
It can produce shallow 120° countersinks. Dedicated countersink tools may be more suitable for larger diameters, deeper features, or demanding surface-finish requirements.
Yes. Tool diameter, cutting length, flute length, shank diameter, overall length, point geometry, coating, and edge preparation can be customized.
Yes. The 120° geometry can produce a shallow chamfer when the required chamfer angle matches the tool.
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