DRILLING MACHINE

Engineer Data Hub 6 Types, Key Operations & Real Workshop Calculations Types Operations Formulas Hole Dividing Master precision hole-making. ⬇ Swipe to explore Engineer Data Hub

How Does Drilling Work?

Working Principle A rotating drill bit cuts the material. The tool moves into the workpiece. The result: a cylindrical hole. 🔄 Rotation + ⬇️ Feed = ⭕ Hole 1 Drill bit rotates at selected speed 2 Feed pushes bit into workpiece 3 Chips evacuate through flutes 4 Cylindrical hole is created Engineer Data Hub

6 Types of Drilling Machines

Machine Types 1. Bench Drill Small parts — benchtop mounted 2. Pillar Drill General workshop — floor-mounted column 3. Radial Drill Large workpieces — movable head on arm 4. Gang Drill Sequential operations — multiple heads in a row 5. Multi-Spindle Multiple holes together — high production 6. CNC Drill Automated precision — complex patterns Engineer Data Hub

Know Your Machine

Machine Anatomy 1 Base 2 Column 3 Worktable 4 Drill head 5 Motor 6 Spindle 7 Chuck 8 Drill bit 9 Feed handle 10 Speed control 11 Depth stop 12 Coolant system Every part supports one goal — a precise, repeatable hole. Engineer Data Hub

From Setup to Precision

Process 1 Clamp the workpiece 2 Select the correct drill 3 Set speed and feed 4 Align and drill 5 Inspect the finished hole Clamp Drill Speed Feed Inspect Engineer Data Hub

More Than Making Holes

Operations 1. Drilling Create a hole 2. Reaming Improve accuracy + finish 3. Tapping Cut internal threads 4. Counterboring Cylindrical recess 5. Countersinking Conical recess 6. Spot facing Flat seating surface One machine — six ways to finish a hole. Engineer Data Hub

Calculate Spindle Speed

Core Formula N = (V × 1000) / (π × D) Spindle speed (rpm) N rpm V m/min D mm Match the speed to the material and drill size . Engineer Data Hub

Try This Steel Drilling Example

Worked Example Drill diameter D 10 mm Cutting speed V 25 m/min Feed per rev f r 0.1 mm/rev Spindle speed ≈ 796 rpm Feed rate ≈ 79.6 mm/min 796 RPM • 79.6 MM/MIN N = (25 × 1000) / (π × 10) ≈ 796 rpm. f = 0.1 × 796 ≈ 79.6 mm/min. Engineer Data Hub

How Long Will Drilling Take?

Productivity T = (L + A) / f Drilling time (minutes) L depth mm A approach mm f mm/min Hole depth L 50 mm Approach A 3 mm Feed f 79.6 mm/min ≈ 0.67 MIN • ABOUT 40 SECONDS Engineer Data Hub

Drill Perfectly Spaced Holes

Hole Dividing θ = 360° / N Angular increment C = D × sin(180°/N) Chord length Example: 6 holes • 100 mm PCD Angular spacing 60° Pitch circle D 100 mm Chord between holes 50 mm C = 100 × sin(30°) = 50 mm. Coordinates from X = R·cos(α+kθ), Y = R·sin(α+kθ). Engineer Data Hub

Work Smart. Machine Safely.

Safety & Tips ✓ Clamp every workpiece securely ✓ Centre-punch or centre-drill first ✓ Select suitable speeds and feeds ✓ Clear chips safely • use cutting fluid ✓ Wear eye protection ✓ Keep hands & loose clothing away NEVER CLEAR CHIPS WHILE ROTATING Use guards. Follow lockout/tagout before maintenance. Check drill condition before every hole. Engineer Data Hub

Ready to Drill With Precision?

Engineer Data Hub Understand the machine. Calculate the parameters. Improve your results. EXPLORE THE COMPLETE GUIDE HOLE DIVIDING CALCULATOR → Bearing Decoder Spur Gear Helical Gear Worm Gear Lathe Taper Save this guide for your next drilling job. Share it with a machinist or engineer. Engineer Data Hub