Dijet Dream Drill vs OSG ADO: Indexable Drill Comparison for Production Holemaking
Indexable carbide drills have revolutionized production holemaking by eliminating the need for re-sharpening and providing consistent, predictable tool life. Two standout products in this category are the Dijet Dream Drill (Japan) and the OSG ADO series (Japan). While both target the 2xD to 5xD drilling range, their insert clamping systems, geometry philosophies, and grade offerings differ in important ways. This article provides a comprehensive technical comparison.
Indexable Drill Fundamentals
Indexable drills use replaceable carbide inserts — typically a center insert and a peripheral insert — mounted in a steel drill body. The center insert creates the pilot hole while the peripheral insert finishes the bore to diameter. Key performance factors include insert clamping rigidity, chip evacuation efficiency, coolant delivery, and insert geometry.
Dijet Dream Drill Overview
Dijet Industrial Co., Ltd., based in Osaka, Japan, developed the Dream Drill as a next-generation indexable drill platform. Key innovations include:
- Dream Drill insert shape: Proprietary curved cutting edge that reduces cutting forces by 20-30% compared to straight-edge inserts
- Wavy flute design: Promotes chip curling and prevents long chip tangling
- Internal helical coolant: Coolant exits at high pressure directly behind the cutting edge
- Rigid screw clamping: Top-clamp design with a shaped pocket provides axial and radial insert retention
| Parameter | Dream Drill 2xD | Dream Drill 3xD | Dream Drill 5xD |
|---|---|---|---|
| Diameter range | 12.0-50.0 mm | 14.0-42.0 mm | 16.0-32.0 mm |
| Drilling depth | 2 x diameter | 3 x diameter | 5 x diameter |
| Insert type | DCET (curved edge) | DCET (curved edge) | DCET (curved edge) |
| Insert sizes | 07, 09, 11 | 09, 11 | 11 |
| Coolant | Internal helical | Internal helical | Internal helical |
| Clamping | Screw + pocket | Screw + pocket | Screw + pocket |
OSG ADO Series Overview
OSG Corporation’s ADO (Advanced Drill OSG) series represents their premium indexable drill line with a focus on high-speed capability and broad material coverage:
| Parameter | ADO-2D | ADO-3D | ADO-5D |
|---|---|---|---|
| Diameter range | 10.0-63.0 mm | 12.0-50.0 mm | 14.0-40.0 mm |
| Drilling depth | 2 x diameter | 3 x diameter | 5 x diameter |
| Insert type | AD (standard), ADS (wiper) | AD, ADS | AD |
| Insert sizes | 06, 08, 10, 12 | 08, 10, 12 | 10, 12 |
| Coolant | Internal straight | Internal straight | Internal straight |
| Clamping | Screw clamp | Screw clamp | Screw clamp |
Insert Grade Comparison
| Application | Dijet Grade | OSG Grade | Dijet Coating | OSG Coating |
|---|---|---|---|---|
| Steel general | DZ3220 | XGM | TiAlN PVD | TiAlN PVD |
| Steel roughing | DZ3230 | XGM-H | TiAlN PVD (tougher) | TiAlN PVD (tougher sub) |
| Stainless steel | DZ5220 | XGM-S | TiAlSiN PVD | TiAlSiN PVD |
| Cast iron | DZ4220 | XGM-C | Al₂O₃ CVD | Al₂O₃ CVD |
| Hardened steel | DZ3210 | XGM-HR | AlCrN PVD | AlTiCrN PVD |
Performance Comparison: S45C Drilling
Conditions: S45C (1045) plate, Ø20mm through hole, 2xD depth. Vc = 150 m/min, f = 0.20 mm/rev. Internal coolant at 25 bar.
| Parameter | Dijet Dream Drill | OSG ADO-2D |
|---|---|---|
| Thrust force | 2,800 N (curved edge advantage) | 3,500 N |
| Torque | 12 Nm | 14 Nm |
| Hole diameter tolerance | +0.03/+0.08 mm | +0.04/+0.10 mm |
| Hole straightness | 0.02 mm/100mm | 0.03 mm/100mm |
| Surface finish (Ra) | 2.5-3.5 µm | 3.0-4.5 µm |
| Tool life (holes per edge) | 800-1,200 | 700-1,000 |
| Chip form | Short C-shaped (wavy flute) | Medium C-shaped |
Performance Comparison: SUS304 Stainless Drilling
Conditions: SUS304 (304SS) plate, Ø16mm through hole, 3xD depth. Vc = 80 m/min, f = 0.12 mm/rev.
| Parameter | Dijet Dream Drill | OSG ADO-3D |
|---|---|---|
| Thrust force | 3,200 N | 3,800 N |
| Tool life (holes) | 200-300 | 180-260 |
| Work hardening at exit | Minimal (lower force) | Moderate |
| Built-up edge | Minor | Minor |
| Exit burr | Small (0.1-0.3mm) | Moderate (0.2-0.5mm) |
Detailed Feature Comparison
| Feature | Dijet Dream Drill | OSG ADO |
|---|---|---|
| Cutting edge geometry | Curved (reduced force) | Straight (conventional) |
| Flute design | Wavy (chip control) | Standard spiral |
| Smallest diameter | 12 mm | 10 mm |
| Largest diameter | 50 mm | 63 mm |
| Insert corners usable | 2 | 2-4 (depending on type) |
| Wiper insert option | No | Yes (ADS type) |
| Pilot drill required | No (self-centering) | No (self-centering) |
| Minimum coolant pressure | 15 bar | 10 bar |
| Drill body material | Alloy steel, hardened | Alloy steel, hardened |
| Price per drill body (Ø20) | $180-250 USD | $200-280 USD |
| Price per insert set | $18-28 USD | $22-35 USD |
Cutting Parameter Recommendations
| Material | Drill | Vc (m/min) | f (mm/rev) | Coolant Pressure |
|---|---|---|---|---|
| Low carbon steel (S15C) | Dream Drill | 150-200 | 0.18-0.30 | 15-25 bar |
| Medium carbon (S45C) | Dream Drill | 130-180 | 0.15-0.25 | 15-25 bar |
| Alloy steel (SCM440) | Dream Drill | 100-150 | 0.12-0.20 | 20-30 bar |
| Stainless (SUS304) | Dream Drill | 60-100 | 0.08-0.15 | 20-35 bar |
| Cast iron (FC250) | ADO | 150-250 | 0.20-0.35 | 10-20 bar |
| Aluminum (A6061) | ADO | 200-400 | 0.20-0.40 | 10-20 bar |
Competitor Comparison
| Dijet Dream Drill | OSG ADO | Sandvik CoroDrill 880 | Kennametal KSEM | Iscar SUMOCHAM |
|---|---|---|---|---|
| 12-50mm, 2-5xD | 10-63mm, 2-5xD | 8.5-84mm, 2-5xD | 12-120mm, 2-8xD | 8-34mm, 1.5-5xD |
| Curved edge innovation | Conventional, reliable | Wiper standard | Modular heads | Interchangeable heads |
Key Takeaways
- Dijet’s curved cutting edge geometry reduces thrust forces by 20-30%, enabling drilling on less rigid machines and in thin-walled workpieces
- OSG ADO offers a broader diameter range (10-63mm vs 12-50mm) and wiper insert options
- Both brands deliver comparable tool life on standard materials when used with correct parameters
- Dream Drill’s wavy flute design provides superior chip control in stringy-chip materials like low carbon steel
- OSG’s broader grade portfolio (5 variants vs Dijet’s 5) provides more material-specific optimization options
- For high-volume production, the cost per hole is similar between both brands — selection should be based on machine capability and material mix
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