Product

DLC Coated Roll Tap Aluminum

DLC Coated Roll Tap for Aluminum | Chipless Thread Forming Tap M3-M16
Unlike conventional TiN or TiCN coated taps, DLC coating effectively solves the biggest industry pain point — aluminum sticking and built-up edge (BUE) during high-speed tapping. With a fluteless chipless forming design, no swarf is generated during processing, completely avoiding thread scratching, hole clogging, and tap breakage. The cold forming process compresses the metal grain structure, producing smoother, harder, and more precise internal threads for high-volume aluminum component production.

DLC Coated Roll Tap for Aluminum | Chipless Thread Forming Tap M3-M16

  • Professional DLC Diamond-Like Carbon Coating Ultra-low friction coefficient, super anti-sticking performance, perfectly prevent aluminum material adhesion. Maintain consistent thread quality during long-term high-speed tapping.
  • Zero Chip Forming Technology
    Fluteless extrusion structure requires no chip evacuation. Ideal for blind holes, deep holes and thin-wall aluminum parts without thread damage.
  • Superior Surface Finish & Precise Threads
    Cold rolling process improves thread density and surface smoothness. No burrs, no tearing, fully meets high-precision assembly standards.
  • Longer Tool Life for Aluminum Machining
    DLC coating provides excellent wear resistance. Tool lifespan is 3–5 times longer than ordinary taps when processing aluminum alloy.
  • High Rigidity & Anti-Breakage Structure
    Reinforced core diameter design enhances overall rigidity, reducing tap fracture under continuous high-speed CNC operation.
  • Standard International Dimensions
    Compliant with ISO and DIN standards, fully compatible with standard tool holders and automated machining equipment.

Technical Specifications (M3–M16 Standard Size)

Standard: ISO 529 / DIN 371 | Default Tolerance: 6H | Material: HSS-E / HSS-PM optional | Surface: DLC Coating

Thread Size

Standard Pitch (mm)

Overall Length (mm)

Shank Diameter (mm)

Thread Working Length (mm)

Square Drive Width (mm)

M3

0.50

48

3.5

9

2.7

M4

0.70

53

4.5

11

3.4

M5

0.80

56

6.0

13

4.9

M6

1.00

63

6.0

15

4.9

M7

1.00

63

7.0

15

5.9

M8

1.25

70

8.0

17

6.2

M10

1.50

76

10.0

20

8.0

M12

1.75

82

9.0

22

7.0

M14

2.00

90

11.0

24

9.0

M16

2.00

90

12.0

24

10.0

Recommended Pre-Drill Size Chart for Roll Tapping

Precise hole size for aluminum roll forming, ensuring perfect thread fill rate and minimum tapping torque

Size

Standard Pitch (mm)

Pre-Drill Hole Diameter (mm)

M3

0.50

2.80

M4

0.70

3.70

M5

0.80

4.60

M6

1.00

5.50

M7

1.00

6.50

M8

1.25

7.40

M10

1.50

9.30

M12

1.75

11.10

M14

2.00

12.90

M16

2.00

14.90

Customization Service
We support custom long shank, fine pitch, special size, 5H/6G precision tolerance, and laser logo engraving. All taps are 100% inspected before delivery to ensure stable and consistent quality for global industrial customers.