Solid Carbide Twist Drill with 140° Point Angle for Precision Metal Machining
Consistent Quality
Consistent geometry across repeat orders.
유연한 주문
Small batches and mixed sizes available.
OEM Support
Custom marking, labels and packaging.
표준 및 맞춤형
Standard sizes and custom configurations.
140° Solid Carbide Twist Drill Overview
This 140° solid carbide twist drill is designed for high-precision hole machining in carbon steel, alloy steel, pre-hardened steel, cast iron and other confirmed metal grades. The precision-ground 140° point provides a flatter cutting profile for controlled penetration, while two spiral flutes support continuous chip evacuation in blind-hole and through-hole drilling. Manufactured from fine-grain solid carbide, the drill provides high rigidity, repeatable dimensional performance and wear resistance for CNC production. Standard 3×D, 5×D and 8×D configurations are available from Ø3.0 to Ø20.0 mm.
140°
3×D / 5×D / 8×D
Ø3.0–20.0 mm
Fine-Grain Solid Carbide
Key Configuration
Precision-Ground 140° Point
The flatter 140° point supports controlled penetration and stable cutting when used with a rigid machine setup and accurate toolholding.
Two Spiral Flutes
Two precision-ground spiral flutes guide chips away from the cutting zone during blind-hole and through-hole drilling.
Application-Specific Options
Coating, edge honing, point thinning, shank dimensions and drilling depth can be selected according to the material grade and production requirement.
Key Product Advantages
Controlled Penetration
The 140° point profile supports a controlled entry and stable drilling cycle in suitable precision metal-machining applications.
Consistent Hole Geometry
Precision-ground cutting lips and solid-carbide rigidity help support repeatable hole diameter, straightness and surface quality.
Efficient Chip Evacuation
Two spiral flutes provide a direct chip path for blind-hole and through-hole drilling across the standard depth series.
3D / 5D / 8D Selection
Three depth configurations allow the tool length to be selected according to rigidity, hole depth, chip removal and production requirements.
Workpiece Material Compatibility
Applications & Target Scope
- High-precision hole machining
- Blind-hole drilling
- Through-hole drilling
- General CNC production drilling
- Mechanical and mold component machining
- Repeat-batch hole production
Product & Cutting-Edge Details
Tool Nomenclature & Dimensions
This 140° solid carbide twist drill series is available from Ø3.0 to Ø20.0 mm in 3×D, 5×D and 8×D configurations. The standard construction uses two spiral flutes and a cylindrical straight shank. Point thinning, coating, edge preparation, shank diameter and tolerance can be adjusted according to the application.
3D, 5D & 8D Standard Size Matrix
Standard dimensions from the original product specification are listed below. All dimensions are in millimetres.
| d1 | 3D L1 | 3D L | 5D L1 | 5D L | 8D L1 | 8D L |
|---|---|---|---|---|---|---|
| 3 | 20 | 62 | 28 | 66 | 30 | 70 |
| 4 | 24 | 66 | 36 | 74 | 42 | 83 |
| 5 | 28 | 66 | 44 | 82 | 50 | 90 |
| 6 | 28 | 66 | 44 | 82 | 57 | 97 |
| 7 | 34 | 79 | 53 | 91 | 76 | 116 |
| 8 | 41 | 79 | 53 | 91 | 76 | 116 |
| 9 | 47 | 89 | 61 | 103 | 87 | 131 |
| 10 | 47 | 89 | 61 | 103 | 95 | 139 |
| 11 | 55 | 102 | 71 | 118 | 106 | 155 |
| 12 | 55 | 102 | 71 | 118 | 114 | 163 |
| 13 | 60 | 107 | 77 | 124 | 133 | 182 |
| 14 | 60 | 107 | 77 | 124 | 133 | 182 |
| 15 | 65 | 115 | 83 | 133 | 152 | 204 |
| 16 | 65 | 115 | 83 | 133 | 152 | 204 |
| 17 | 73 | 123 | 93 | 143 | 171 | 223 |
| 18 | 73 | 123 | 93 | 143 | 171 | 223 |
| 19 | 79 | 133 | 101 | 153 | 190 | 244 |
| 20 | 79 | 133 | 101 | 153 | 190 | 244 |
140° Precision Drilling Guidance
- 3D Drilling: Provides higher rigidity for shallow holes, close-tolerance drilling and short production cycles.
- 5D Drilling: Suitable for medium-depth holes with stable chip evacuation and consistent coolant delivery.
- 8D Drilling: Requires minimal holder runout, rigid setup, reliable chip removal and conservative starting parameters.
- 140° Point Selection: Suitable where controlled penetration and a flatter drill-point profile are preferred. Irregular, curved or inclined entry surfaces may still require pilot preparation.
- Precision Setup: Use a high-quality holder, minimal tool overhang, low spindle runout and stable workholding to support hole accuracy.
Recommended Starting Cutting Parameters
The original product page provides the following starting references. Actual cutting data depend on drill diameter, hole tolerance, drilling depth, coating, workpiece grade, machine rigidity, holder runout and coolant condition.
| WORKPIECE MATERIAL | HARDNESS / CONDITION | Vc (m/min) | FEED GUIDANCE | COOLANT |
|---|---|---|---|---|
| 탄소강 | Below HRC30 | 70–110 | Adjust according to diameter, tolerance and hole depth | Stable external coolant |
| 합금강 | HRC30–45 | 50–85 | Reduce speed and feed as hardness and depth increase | Consistent coolant supply |
| Pre-Hardened Steel | HRC45–55 | 30–55 | Use low runout, short overhang and conservative feed | Stable coolant delivery |
| 주철 | Gray / Ductile Cast Iron | 70–130 | Adjust according to casting condition and hole depth | Dry, air blast or suitable coolant |
Solid Carbide Drill Product Family Overview
Select the drill according to point geometry, required depth and workpiece material.
140° Precision Drill
3D / 5D / 8D (Current)
135° Split-Point Drill
Steel / Stable Entry
Stub-Length Drill
High-Rigidity Short Holes
Custom Twist Drill
Special Diameter / Length
For additional sizes and related drill series, View the Solid Carbide Drill Catalog.
140° Point Precision Drill Customization
Cutting diameter, flute length, 140° point geometry, web thinning, edge preparation, coating and tolerance can be configured for precision metal hole machining. The primary material and required entry behavior determine the final cutting configuration.
140° Point Geometry & Edge Preparation
The 140° point, chisel-edge correction, web thickness, margins and cutting edges can be configured for stable entry, controlled thrust and precision hole formation.
Diameter & Length Options
Metric, fractional-inch and non-standard diameters can be paired with application-specific flute, shank and overall dimensions.
OEM 및 자체 브랜드 서비스
OEM manufacturing and private-label supply options for precision-metal manufacturers, industrial distributors and tooling brands.
Laser Etching
Custom laser marking for logos, tool codes, diameter specifications, coating identification and batch numbers.
Custom Packaging
Individual protective tubes, diameter labels, multi-pack boxes, custom inserts and private-label packaging options.
Commercial Terms
Flexible MOQ options for standard configurations, custom sizes, trial orders and scheduled repeat supply.
Technical Workflow
Inquiry
Submit the material, hole dimensions, entry condition, tolerance and quantity.
Engineering
The 140° point, web thinning, edge preparation and coating are reviewed.
Commercial
Quotation, MOQ, production schedule and delivery terms are confirmed.
Production
CNC grinding, 140° point formation, edge preparation, coating and marking.
Quality Control
Diameter, 140° point geometry, symmetry, runout and cutting edges are inspected.
Inspection & Quality Control
Drill dimensions, cutting-edge geometry and visible surface condition are checked according to the confirmed product specification and application requirements.
Protective Packing for Shipment
Finished drills are protected individually before batch labeling and export-carton reinforcement.
Individual Tool Protection
Each drill is individually protected in a plastic tube to reduce contact damage during storage, handling and transportation.
Batch & Label Verification
Tools are grouped and labeled by specification to support order verification before carton packing.
Export Carton Protection
Batch packaging, cushioning materials and reinforced export cartons are selected according to the order quantity and shipping method.
Reference Lead Time
The following timeframes are general references. Availability and production scheduling are reviewed for each order.
Shipping Options
Shipping arrangements can be selected according to order size, delivery schedule and destination.
Product FAQs
Product-specific information about 140° point geometry, precision metal drilling, machining stability, material selection and tool configuration.
What is the purpose of the 140° point angle?
The 140° point geometry is intended for controlled entry and stable precision drilling in suitable metal applications. The relatively flat point geometry can support cutting-edge strength and consistent penetration when the drill is used with a rigid machine setup, low runout and appropriate cutting parameters.
What materials can this 140° carbide drill machine?
The drill can be configured for precision machining of different metal materials according to the carbide grade, flute geometry, edge preparation and coating. Please confirm the exact material grade, hardness and heat-treatment condition before selecting the final tool configuration.
Is a 140° point suitable for precision hole machining?
Yes, when matched to the workpiece material and machining conditions. Hole accuracy also depends on drill runout, tool overhang, machine rigidity, holder accuracy, entry surface, coolant condition and the selected cutting parameters.
What machining conditions are important for stable drilling?
Use a rigid CNC setup, low spindle and holder runout, secure workpiece clamping and the shortest practical tool overhang. Stable feed and effective chip evacuation are also important for maintaining hole quality and protecting the carbide cutting edges.
Can the diameter, length, geometry and coating be customized?
Yes. Cutting diameter, flute length, shank diameter, overall length, edge preparation and coating can be reviewed according to the required hole, workpiece material, hardness and CNC conditions. Non-standard dimensions can also be evaluated from a drawing or existing tool sample.
What information is required for a quotation?
Please provide the cutting diameter, hole depth, required tolerance, workpiece material and hardness, flute length, shank diameter, overall length, coolant method, machine type and required quantity. A drawing is recommended for non-standard dimensions or special precision-hole requirements.
Ordering & OEM FAQs
General information for trial orders, mixed sizes, OEM marking and repeat distributor supply.
Do you accept small trial orders?
Yes. Small trial quantities can be reviewed for hole-quality testing, dimensional verification and tool-life evaluation before larger repeat orders.
Can mixed drill sizes be ordered together?
Yes. Different cutting diameters and length configurations can normally be combined in one order when the carbide grade, geometry, coating and production requirements are compatible.
Is OEM laser marking available?
Yes. Logo, item code, tool size and batch identification can be reviewed for laser marking where the available shank area permits. Custom labels and private-brand packaging are also available for OEM programs.
What is the typical production lead time?
Lead time depends on diameter, flute length, coating, custom geometry and order quantity. Final production scheduling is confirmed after the tool specification and application requirements are approved.
Downloads & Technical Resources
Access drill series information and starting cutting-data references for precision solid carbide drilling.
Need Sizes, Pricing or Custom Options?
Send us the required tool type, sizes, quantities, workpiece material and any OEM or custom requirements. We will confirm suitable specifications, availability, lead time and quotation details.
Drawings, size lists and reference photos are welcome.
