Long Length HSS Twist Drill Bits Set for Metal Stainless Steel

• Customization: Available
• Customized: Customized
• Standard: AISI
• Model NO.: HSS DRILL BITS
• Length: Jobber-length
• Type: Twist Drill Bit
• Material: High Speed Steel
• Usage: Well Drilling, Metal Drilling, Masonry Drilling
• Process: Roll Forged / Full Ground / Milled
• Shank Type: Round Shank
• Groove: Single / Double
• Heat Treatment: Full Groove Length Heat Treatment
• Transport Package: Plastic Box(Tube), Carton Box
• Specification: 40*25*18 cm
• Trademark: JG or OEM
• Origin: Jiangsu, China
• Production Capacity: 10000 PCS/Day
• Package Size: 50.00cm * 50.00cm * 20.00cm
• Package Gross Weight: 2.000kg

Product Description

Product Description

HSS (High-Speed Steel) twist drill bits sets stand out as versatile and reliable tools for drilling tasks across home workshops, professional garages, and industrial settings, thanks to a combination of material superiority, structural design, and functional adaptability. Their core characteristics address the demands of diverse drilling needs while ensuring durability and performance.

First, the HSS material foundation is a defining advantage. Unlike carbon steel or low-alloy drill bits, HSS (typically composed of alloys like W18Cr4V) boasts exceptional heat resistance—critical for withstanding the friction-generated high temperatures during high-speed drilling. This heat tolerance prevents the bit from softening or losing sharpness prematurely, even when drilling through tough materials like stainless steel, cast iron, or hardened alloys. Additionally, HSS offers superior wear resistance; the material's dense molecular structure and alloy composition minimize edge dulling from repeated use, extending the bits' service life far beyond basic drill sets. It also delivers better toughness, reducing the risk of chipping or breaking when encountering minor imperfections in workpieces, such as knots in wood or small metal burrs.

Second, the twist-flute design enhances both drilling efficiency and precision. The spiral flutes (the signature "twist" of the bits) serve two key purposes: chip evacuation and stability. As the bit rotates, the flutes act as channels to pull drilling chips—whether wood shavings, metal filings, or plastic scraps—out of the hole, preventing clogging. Clogged holes not only slow down drilling but also cause overheating (from trapped friction) and uneven hole walls; the twist design eliminates this issue by maintaining clear pathways for debris. Moreover, the spiral structure adds structural rigidity to the bit, reducing wobbling during drilling. This stability ensures the bit stays on target, producing straight, accurate holes—essential for tasks like installing hardware, assembling furniture, or working on mechanical parts where hole alignment matters.

Third, versatility across materials makes these sets a one-

Material	HSS 4241, 6542, M35 , M42
Manufacturing Process	Roll Forged / Full Ground
Heat Treatment	Full groove length heat treatment
Point angle	135 or 118 split point
Size	1.5-6.5*0.5 mm +3.2+4.8mm
Surface Finishing	amber color/coffedd color
Packaging	19pcs in plastic box, then in carton