WIDIA GTD
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Pertanyaan umum tentang WIDIA GTD dari 3G Electric.
What coatings are available on WIDIA GTD taps, and how do they affect performance?
WIDIA GTD taps are offered with TiN (titanium nitride), TiCN (titanium carbonitride), and black oxide coatings. TiN coating provides general-purpose wear resistance and reduces friction, suitable for steels and cast irons. TiCN coating offers higher hardness and thermal stability, ideal for abrasive materials like stainless steel and high-temperature alloys. Black oxide is a surface treatment that improves lubricity and corrosion resistance, often used on cobalt taps for ferrous materials. The coating choice extends tool life and improves thread quality by reducing built-up edge and galling.
What is the difference between spiral-point and spiral-flute WIDIA GTD taps?
Spiral-point taps (also called gun taps) have a cutting face angled forward to push chips ahead of the tap, making them suitable for through-hole threading. They typically have 2 to 3 flutes and a plug chamfer. Spiral-flute taps have helical flutes that pull chips upward and out of the hole, designed for blind-hole threading. They usually have 3 flutes and a bottoming or semi-bottoming chamfer. WIDIA GTD offers both types in inch and metric sizes, with coatings optimized for specific materials.
What thread classes are available for WIDIA GTD inch taps?
WIDIA GTD inch taps are manufactured to H limits (e.g., H2, H3, H4, H5) which define the pitch diameter tolerance relative to the basic thread profile. Common classes include H2 for 2B fit, H3 for 3B fit, and H5 for looser tolerances. The specific H limit is marked on the tap shank or in the product specification. For metric taps, WIDIA GTD uses 6H (internal thread tolerance) and 6G (for coated taps) as standard.
Can WIDIA GTD taps be used for threading aluminum?
Yes, WIDIA GTD offers taps specifically designed for aluminum, such as the spiral-flute tap for aluminum (SKU 13X332, MPN 16058) and straight-flute machine taps for aluminum (SKU 11W881, MPN GT40). These taps feature polished flutes and optimized rake angles to reduce chip adhesion and improve surface finish. They are typically made from high-speed steel and may have a 2BX thread class for controlled fit in aluminum alloys.
What is the difference between a hand tap and a machine tap in the WIDIA GTD line?
WIDIA GTD hand taps (e.g., straight-flute taps like SKU 53ML85) are designed for manual or low-speed machine use, with a taper chamfer for gradual cutting. Machine taps (e.g., spiral-point or spiral-flute) are intended for higher-speed CNC or production tapping, with geometries that optimize chip evacuation and tool life. Machine taps often have tighter tolerances (e.g., H3) and coatings for extended performance. Both types are available in the GTD line.
Does 3G Electric supply WIDIA GTD products?
Yes — 3G Electric (S) Pte. Ltd. supplies WIDIA GTD products. We stock the WIDIA GTD catalog and supply genuine factory-original products with full manufacturer warranty and technical support.



















