Carbide Roll Form Taps|Long tool Life

carbide roll form taps with long tool life

Carbide Roll Form Tap (also known as a cold-forming tap) is designed to produce strong, wear-resistant threads without cutting chips. Utilizing a cold extrusion process, this tool displaces material to form threads, making it ideal for high-volume production runs in demanding industries such as automotive, aerospace, and precision engineering. Manufactured from ultra-fine grain tungsten carbide, it delivers exceptional tool life, superior thread quality, and unmatched performance in tough-to-machine materials.

Technical Specifications

Parameter	Specification
Product Name	Carbide Roll Form Tap
Material	Ultra-Fine Grain Tungsten Carbide
Coating Options	Uncoated / TiN / TiCN / TiAlN / DLC
Thread Standards	Metric (M), UNC, UNF, BSP, BSPT, NPT, NPTF, Custom
Thread Tolerance	ISO 2 (6H/6g), ANSI Class 2B/3B
Pitch Range	0.35 mm – 3.0 mm (Metric) 48 TPI – 8 TPI (Imperial)
Tap Size Range	M3 – M24 (Metric) #4 – 1" (Imperial)
Overall Length (OAL)	Per DIN 371 / DIN 376 / ANSI standards
Shank Diameter	Standard or custom upon request
Flute Type	Fluteless (Roll Form)
Coolant Through	Optional (on special request)
Application	CNC machining centers, multi-spindle automatics, rotary transfer machines

Recommended carbide form tap drill Hole Sizes Chart (Cold Forming)

Accurate pilot hole diameter is critical for roll form tapping. Oversized holes cause weak threads; undersized holes increase torque and risk tool breakage.

Metric Threads

Thread Size	Pitch (mm)	Recommended Pilot Hole Ø (mm)
M3	0.5	2.70
M4	0.7	3.60
M5	0.8	4.50
M6	1.0	5.40
M8	1.25	7.20
M10	1.50	9.00
M12	1.75	10.80
M16	2.00	14.40
M20	2.50	18.00
M24	3.00	21.60

Unified Inch Threads (UNC/UNF)

Thread Size	TPI	Recommended Pilot Hole Ø (mm)
#6-32 UNC	32	3.20
#8-32 UNC	32	3.80
1/4"-20 UNC	20	5.80
5/16"-18 UNC	18	7.30
3/8"-16 UNC	16	8.80
1/2"-13 UNC	13	11.60
5/8"-11 UNC	11	14.70
3/4"-10 UNC	10	17.70

Note: Pilot hole sizes may vary slightly based on material ductility and coating. Contact us for application-specific recommendations.

Suitable Materials for Machining

Our carbide roll form taps excel in ductile materials where thread integrity and tool longevity are essential:

Carbon Steels: Low-carbon steel (e.g., AISI 1018, 1045)
Alloy Steels: AISI 4140, 4340 (up to 35 HRC)
Stainless Steels: Austenitic grades (303, 304, 316), 17-4 PH (with optimized parameters)
Aluminum Alloys: 6061, 7075, cast aluminum
Copper & Copper Alloys: Brass, bronze, beryllium copper
Titanium Alloys: Grades 1–4 (requires rigid setup and proper lubrication)
Nickel Alloys: Inconel 625, Monel (with coated tools and reduced speed)
Thermoplastics: Nylon, PEEK, POM (with polished taps)