Engineered for industrial metalworking excellence, the ZZST U-Drill / Spade Crown is a high-efficiency, interchangeable insert bit system designed for rapid, precise deep-hole drilling in steel, stainless steel, cast iron, and hardened alloys. Unlike fixed-length drills, its modular design enables instant insert replacement — minimizing downtime and maximizing tool life.
Trusted by Tier-1 suppliers in aerospace, energy, and automotive manufacturing, this drill delivers up to 30% faster machining cycles through optimized geometry, vibration-damping construction, and micron-level grinding accuracy. Backed by Chuanrun’s 17-year legacy, 100% CNC inspection process, and global OEM support, it bridges performance, reliability, and scalability — whether you need standard stock or fully non-standard configurations.
Optimized flute geometry and chip-breaking design enable stable, high-feed-rate drilling — reducing cycle time by up to 30% versus conventional spade bits in medium-to-heavy-duty metal applications.
Modular carbide-tipped inserts allow quick, tool-free replacement without recalibration. Each insert is ground on 5-axis CNC grinders to ±0.005mm tolerance — ensuring consistent hole quality across thousands of cycles.
From OBM branding and custom packaging to non-standard lengths (60–300mm), specialized coatings, and application-specific geometries — ZZST offers end-to-end OEM/ODM services backed by rapid prototyping and 72-hour technical quoting.
| Parameter | Specification |
|---|---|
| Drill Type | Indexable U-Drill / Spade Crown |
| Material | Carbon steel body + replaceable carbide inserts |
| Total Length Range | 60 mm – 300 mm (customizable) |
| Working Length | Customized per application requirements |
| Surface Finish | Black oxide coating |
| Primary Applications | Deep-hole drilling in ferrous & non-ferrous metals |
| Certifications & Standards | ISO 9001 certified manufacturing; 100% dimensional & functional inspection |
| Brand Origin | ZZST Tools — Hunan, Zhuzhou China |
OEM/ODM/Obm Services: Full private labeling, custom packaging (blister, box, pallet), and engineering collaboration — from concept to mass production.
A: Aerospace (engine casings, landing gear), energy (turbine shafts, valve bodies), automotive (engine blocks, transmission housings), and heavy machinery fabrication — where deep, accurate holes in hardened steels are mission-critical.
A: It enhances corrosion resistance, reduces friction during chip evacuation, improves heat dissipation, and provides visual wear indication — extending tool life and maintaining dimensional stability across extended runs.
A: Yes. We accept MOQ as low as 50 pcs for standard configurations and 200 pcs for fully customized designs — with flexible payment terms (T/T, L/C) and priority scheduling for urgent projects.
A: Every unit undergoes 100% inspection using imported coordinate measuring machines (CMM), surface roughness testers, and hardness analyzers. Our facility maintains ISO 9001 certification and operates 80+ multi-axis CNC centers with real-time process monitoring.
Partner with ZZST Tools — where 12 years of precision engineering meets your most demanding applications.
