The GUHRING Series 3944 #4-48 UNF TiCN-CO Thread Forming Tap (Form Tap) is a high-performance chipless forming tap manufactured by Germany GUHRING, built with premium HSS-E PM cobalt powder metallurgy substrate paired with advanced TiCN-CO composite anti-friction coating. Unlike cutting taps, this thread form tap extrudes material to form precise internal UNF threads without chip generation, eliminating chip jamming risks entirely. Designed for #4-48 fine UNF thread mass production, it delivers superior surface finish, high thread strength and extended service life on ductile metals including carbon steel, stainless steel, low alloy steel and non-ferrous alloys, fully compliant with ANSI & DIN dual industrial standards.

• Brand: GUHRING (German professional high-precision threading tool manufacturer)
• Official Series Model: 3944 (UNF Cobalt TiCN Coated Thread Form Tap Series)
• Full Thread Spec: #4-48 UNF (American Unified National Fine thread)
• Tool Material: HSS-E PM (5% Cobalt Powder Metallurgy High Speed Steel, ultra high red hardness & impact toughness)
• Surface Coating: TiCN-CO composite coating (Titanium Carbonitride with carbon enrichment, low friction, anti-adhesion dark grey finish)
• Tap Type: Thread Form Tap (Chipless extrusion forming design, no cutting flutes)
• Class of Fit: Standard tolerance H4 / H5 internal thread fit, 2BX ANSI matching grade
• Chamfer Form: Modified semi-bottoming chamfer (2–3 thread lead length)
• Executive Standard: DIN / ANSI dual standard certification
• Machining Hole Type: Through holes & shallow blind holes
• Cooling Method: Compatible with external flood coolant & high-pressure CNC coolant systems
• Shank Design: Standard ANSI square drive shank for rigid chuck clamping

• Carbon steel: 1010, 1018, 1045 free-machining steel (≤ HRC 32)
• Stainless steel: 303, 304, 316, 416 free-cutting stainless alloys
• Low alloy structural steel: 40Cr, 4140, pre-hardened mild mold steel
• Non-ferrous ductile metals: Brass, copper, aluminum alloys, zinc die castings
• Soft ductile ferrous & non-ferrous components prone to built-up edge

• Chipless precision UNF internal thread forming for #4-48 small fine pitch fastener parts
• CNC machining center, automatic lathe high-volume mass threading production
• Electronic hardware, automotive small fittings, hydraulic miniature component manufacturing
• Medical equipment precision small threaded parts requiring smooth burr-free thread surface
• Batch production where chip removal and thread burr defects need full elimination

1. HSS-E PM cobalt powder substrate: Higher heat resistance and wear resistance than conventional HSS-E, withstands continuous high-speed forming loads without tap chipping
2. TiCN-CO carbon composite coating: Ultra-low friction coefficient effectively suppresses material adhesion and built-up edge, greatly extending service life vs standard TiCN coated taps
3. Chipless forming design: No chips generated during machining, eliminates chip clogging, scratching and thread damage issues
4. Extrusion thread strengthening: Cold extrusion process compresses thread grain structure, improving internal thread tensile strength and fatigue resistance by 20%+ compared to cut threads
5. Optimized semi-bottom chamfer: Smooth penetration into workpieces, balanced forming load for stable dimensional consistency
6. Germany precision multi-stage cold forming & grinding process, consistent thread size repeatability for long batch runs