CrN (Chromium Nitride) Coated Thread Forming Taps are specially optimized for non-ferrous soft metal precision tapping. Different from TiN, TiCN and DLC coatings, CrN coating features ultra-low friction coefficient, excellent anti-welding and anti-sticking performance on copper, brass and aluminum alloys.
Machinable Materials
CrN coated forming taps are best-in-class for non-ferrous ductile metals, especially ideal for sticky copper and brass materials that other coatings struggle with:
Copper & Brass Series (Core Application): Pure copper, red copper, brass, bronze, copper alloy connectors and conductive partsAluminum Alloy: 6061, 6063, 7075, die-cast aluminum, aluminum extrusion profiles
Zinc & Magnesium Alloy: Die-cast zinc alloy and lightweight magnesium alloy parts
Soft Carbon Steel: Low-carbon mild steel and annealed ductile steel
Full Technical Specification (M3-M16)
Standard: ISO 529 / DIN 371 | Tolerance: Standard 6H | Material: HSS-E / HSS-PM Optional | Surface: CrN Coating
Thread Size
Standard Pitch (mm)
Overall Length (mm)
Shank Diameter (mm)
Working Thread 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 Forming
Optimized pre-drill diameter for CrN coated forming taps, ensuring perfect thread fill rate, low tapping torque and no thread deformation for copper, brass and aluminum machining
Thread 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 thread pitch, long shank, special tolerance (5H/6G), fine thread size and laser brand logo. All CrN coated forming taps undergo strict dimensional inspection and coating quality testing to provide stable and high-efficiency tapping solutions for global precision manufacturing factories.
