【Product Description】

10x 3mm 60° HSS Center Drill Set – Combined Countersink Lathe Tool for Precise Holes

This 10-piece set of HSS center drills features 3mm cutting diameter with 60-degree included angle. Designed for precise centering and hole positioning on lathes and milling machines. Ideal for prefabricated precise positioning during hole machining, reducing errors and ensuring accurate results on shaft parts and end surfaces.

【Important – Age Verification Required】

⚠️ This product is for professional/industrial use only. You must be 18 years or older to purchase. Age verification and signature will be required upon delivery.

【Technical Specifications】

| Parameter | Value |
|-----------|-------|
| Tip Diameter (Edge Diameter) | 3 mm |
| Shank Diameter | 8 mm |
| Overall Length | 50 mm |
| Edge Length | 4 mm |
| Angle | 60 Degrees |
| Material | HSS (High Speed Steel) |
| Number of Edges | 2 edges |
| Quantity | 10 pieces |

【Key Features】

✓ 100% brand new and high quality
✓ Quick cutting – Fast material removal
✓ Good chip removal – Prevents clogging
✓ High hardness – Long service life
✓ High strength – Tight bonding between matrix and cladding
✓ Precision positioning – Reduces drilling errors
✓ Combined design – Center drill and countersink in one tool

【Applications】

| Application | Description |
|-------------|-------------|
| Center hole drilling | End surfaces of shaft parts |
| Precise positioning | Guide for subsequent drilling operations |
| Countersinking | Combined countersink and centering |
| Lathe centering | Precision centering operations |
| Milling machine | Hole preparation and alignment |
| Metalworking | General machining and fabrication |

【Compatible Machines】

✓ Lathe (Centre Lathe / Engine Lathe)
✓ Milling Machine
✓ Drill Press
✓ CNC Machining Center

【Recommended Speeds】

| Material | Recommended RPM |
|----------|-----------------|
| Mild Steel | 1,200 – 2,000 |
| Stainless Steel | 600 – 1,000 |
| Aluminium | 2,000 – 3,500 |
| Brass / Copper | 1,500 – 2,500 |
| Cast Iron | 800 – 1,200 |

【How to Use – Best Results】

| Step | Action |
|------|--------|
| 1 | Secure workpiece firmly in the lathe or mill |
| 2 | Mount the center drill in the tailstock or spindle |
| 3 | Set appropriate RPM for your material |
| 4 | Apply light, steady pressure |
| 5 | Use cutting oil for better results and longer tool life |
| 6 | Clear chips regularly during operation |

【Recommended Usage Tips】

✓ Use a centre punch to mark the drilling location before starting
✓ Apply cutting fluid to extend tool life and improve finish
✓ Avoid excessive pressure – let the tool cut at its own pace
✓ For best results on hard materials, use slower speeds
✓ Regular inspection recommended for wear

【Package Includes】

10 x HSS Center Drill Bit (3mm tip, 8mm shank, 50mm length, 60° angle)

【Important Notes】

⚠️ For professional/industrial use only – Age 18+ required
⚠️ Always wear safety glasses during operation
⚠️ Use appropriate cutting fluid for longer tool life
⚠️ Ensure workpiece is securely clamped before drilling
⚠️ Not suitable for hand drilling applications

【Safety Information】

⚠️ Professional use only – Age 18+ required
⚠️ Always wear safety glasses
⚠️ Keep hands clear of rotating parts
⚠️ Secure workpiece firmly before operation
⚠️ Keep away from children
⚠️ Signature required upon delivery

✅ Ideal for machinists, metalworkers, lathe operators, CNC programmers, toolmakers, workshops, and metalworking enthusiasts – a reliable 10-pack of HSS center drills for precise centering and hole positioning on shafts and workpieces!