High-hardness drill bit
The DS170C series of externally cooled, high-efficiency deep-hole carbide drill bits is a cost-effective solution developed by JIAYI Tools specifically for deep-hole machining up to 12 times the diameter and medium-volume production scenarios. It combines "dual-helix external cooling flutes + 38° The "spiral chip-discharge groove" design strikes a balance between "high feed rates, long service life, and low cost" while ensuring precision in deep-hole machining, completely resolving the pain points of traditional external-coolant drill bits—namely, "poor heat dissipation, difficult chip removal, and low efficiency"— It provides efficient deep-hole drilling solutions for the automotive, mold, and energy equipment industries, among others.
| Part Number | DS170C082X |
|---|---|
| Drill Bit Base Material | Ultrafine-Grained Tungsten Carbide Alloy |
| Product Name | Internally Cooled Carbide Drill Bits/Step Drill Bits |
| OEM / ODM | Made to your samples or drawings |
| Specifications | Ø11.80 × 96L × Ø12.0 × 162L |
| Lead time | 2 weeks |
| Packaging (mm) | 15 × 15 × 200mm |
| Blade Diameter DC | Ø11.8mm |
| Blade Length LCF | 96.0mm |
| Shank Diameter DC | Ø12.0mm |
| Overall length OAL | 162.0mm |
| Materials | VHM (ultrafine-grained tungsten carbide alloy) |
| Coating | AlTiN |
| MOQ | 2 pcs |
| Origin | Shenzhen, China |
Design details engineered for accuracy, tool life and process stability.
The cutter body is machined from a single piece of ultra-fine-grain carbide (HRC 68) with no welded joints, ensuring no loosening or runout during high-speed, high-feed machining, with a repeatability of ≤0.003 mm.
The 38° helical chip groove ensures smooth chip evacuation along the groove, improving chip removal efficiency by 40% during deep-hole machining at 12 times the diameter, thereby reducing chip jams and scratches on the hole walls.
The drill bit features a double-helix external cooling flute design, allowing the coolant to flow directly along the flutes to the cutting edge. This improves heat dissipation efficiency by 50% and prevents the risk of drill bit overheating during deep-hole drilling.
The drill tip features a 4°–7° adaptive rake angle design that optimizes cutting force in different materials, reduces tool wear, and improves machining stability.
The drill tip features a 140° centering design with a centering accuracy of ≤0.003 mm, allowing for direct machining without the need to pre-drill a center hole, thereby reducing processing steps and improving efficiency.
Each drill bit passes a G2.5-grade dynamic balancing test, ensuring vibration-free operation at high speeds of 20,000 rpm and guaranteeing machining stability.
The cutting edge is ground using a five-axis CNC grinding machine, with a runout error of ≤0.002 mm, ensuring the roundness and cylindricity of the bore.
Pre- and post-polishing processes reduce friction and ensure excellent chip management
Starting values. Our engineers can tune parameters to your machine and workpiece.
| Workpiece material | Cutting speed vc (m/min) | Feed f (mm/rev) | Coolant |
|---|---|---|---|
| Aluminum Alloy | 80–120 | 0.1–0.25 | Internal + MQL |
| Stainless Steel | 40–70 | 0.06–0.15 | Internal + MQL |
| Steel | 50–80 | 0.08–0.2 | Emulsion |
Typical industries and parts machined with this tool.
Send your hole diameter, depth and workpiece material. We supply standard drills and custom step and special drills made to your samples or drawings.