Non-planar drill bit
The DF177C series of high-efficiency, internally cooled carbide deep-hole drills is a cost-effective solution developed by JIAYI Tools specifically for deep-hole machining up to 12 times the drill diameter in medium-volume production scenarios. It incorporates a "dual-hole internal cooling + 38° spiral flute" design, While ensuring precision in deep-hole machining, it achieves a balance between "high feed rates, long tool life, and low cost," completely resolving the pain points of traditional internal-coolant drill bits—namely, "poor heat dissipation, difficult chip evacuation, and low efficiency"— It provides efficient deep-hole drilling solutions for the automotive, mold, and energy equipment industries, among others.
| Part Number | DF177C |
|---|---|
| Drill Bit Base Material | Ultrafine-grain tungsten carbide alloy |
| Product Name | Internal-cooled carbide drill bit / deep-hole drill bit |
| 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 drill bit features two built-in high-precision internal coolant channels capable of delivering cooling pressure up to 100 bar. The coolant is directed directly to the cutting edge, improving heat dissipation efficiency by 50% and preventing the risk of drill bit burnout during deep-hole drilling.
Features a 35° helical angle chip flute that allows chips to be smoothly evacuated along the flute, improving chip evacuation efficiency by 35% during deep-hole machining at 10 times the diameter, thereby reducing chip jams and scratches on the hole walls.
Utilizing PVD nano-coating technology, the coating has a thickness of 2 μm, a hardness of HV3800, and a coefficient of friction as low as 0.3, resulting in a 1.5-fold increase in tool life compared to traditional coatings.
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 the number of 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 | 70–110 | 0.09–0.22 | 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.