China Jiangsu Xingrui Tools CO.,LTD Company News

In the machining industry, tapping is a critical process for thread production, and ISO529 standard taps play a key role in enhancing both productivity and thread quality. Firstly, ISO529 taps are manufactured with fully ground processing and strict dimensional control, resulting in sharp cutting edges and stable thread precision. This minimizes burr formation during tapping and reduces the need for rework. Secondly, the spiral point design ensures efficient chip evacuation, preventing clogging in the hole. This reduces the risk of tap breakage and improves process continuity, making it especially effective for through-hole applications under high-speed operations. In addition, taps are available in multiple materials (such as HSS-M2 and HSS-M35). Cobalt alloy taps, in particular, offer superior wear resistance and red hardness at high temperatures, making them suitable for difficult-to-machine materials like stainless steel and alloy steels. Finally, ISO529 taps provide multiple tolerance grades (H1–H4) to meet different thread fit requirements, ensuring consistent accuracy and reliability of finished threads. Overall, ISO529 taps not only increase machining efficiency but also guarantee long-term stability in thread quality.

Here is the English explanation of which thread depths or hole types are suitable for spiral flute taps: ✅ Suitable Thread Depths & Hole Types for Spiral Flute Taps: 1. Blind Holes Spiral flute taps are highly recommended for blind holes The spiral flutes direct chips back out of the hole, preventing clogging at the bottom Especially effective for deep blind holes (typically deeper than 2× the diameter) 2. Medium to Deep Thread Depths Ideal for thread depths greater than 1.5 times the diameter (e.g., for M8, thread length ≥12mm) The spiral angle (e.g., 35°, 40°, 45°) ensures smooth chip evacuation, reducing breakage risk 3. Soft Materials Such as aluminum, brass, copper, low carbon steel These materials produce long, continuous chips — spiral flute taps efficiently evacuate chips upward, improving surface finish and preventing chip jamming ❌ Less Suitable Applications: Through Holes: Spiral flute taps are not ideal, as chips need to be pushed forward — better to use spiral point taps or straight flute taps Brittle Materials (e.g., Cast Iron): These materials produce short chips, so straight flute taps are preferred for stability

✅ 1. What Are Blind and Through Holes? Blind Hole: A hole that does not go through the entire workpiece. The bottom is closed. Through Hole: A hole that is completely open on both ends, passing through the material. ✅ 2. Advantages of Spiral Flute Taps Specifically designed for blind hole tapping Upward chip evacuation prevents chip clogging at the hole bottom Reduces the risk of tap breakage and improves tool life Well-suited for ductile materials like stainless steel, carbon steel, and aluminum alloys ✅ 3. Can Spiral Flute Taps Be Used for Through Holes? For through holes, straight flute taps are generally preferred since chips can fall out naturally However, spiral flute taps can also be used in through holes when machining soft materials or when a high-quality surface finish is needed Choose a lower spiral angle (e.g., 15° or 20°) for through hole applications ✅ 4. Selection Recommendations Hole Type Material Recommended Tap Type Spiral Angle Suggestion Blind Hole Stainless steel, aluminum Spiral Flute Tap 35° or higher Through Hole Cast iron, carbon steel Straight Flute / Low-Angle Spiral 15°–20° Pro Tips Always match the material type, hole depth, and chip removal direction when selecting the tap Consider HSS, HSS-E, or carbide taps depending on production volume and hardness requirements Use appropriate lubrication and cutting speed to extend tap life and maintain thread quality Let me know if you'd like an illustrated version or tap selection chart for a catalog or website!

Here's the English version of how to choose standard HSS taps based on workpiece material and hole depth: ✅ 1. Choose Tap Type According to Material Material Type Recommended Tap Type Notes Soft materials (Aluminum, Brass, Plastic) Spiral Flute Tap Smooth chip removal, avoids clogging Carbon Steel, Alloy Steel Straight Flute / Spiral Flute General-purpose, spiral flute preferred for blind holes Stainless Steel, Hard Steel High Helix Spiral Flute (≥35°) Improves chip evacuation, reduces risk of breakage Cast Iron, Powder Metal Straight Flute Tap Brittle chips, no need for aggressive chip evacuation ✅ 2. Match Tap to Hole Depth & Hole Type Hole Type Hole Depth (Relative to Diameter) Recommended Tap Type Notes Through Hole ≤2×D Spiral Point Tap (Gun Tap) Pushes chips forward, ideal for fast tapping Blind Hole ≤1.5×D Straight Flute / Spiral Flute For shallow blind holes, straight flute is sufficient Blind Hole ≥2×D Spiral Flute Tap (35°–45° helix) Effective chip evacuation for deep blind holes Note: D = Nominal thread diameter (e.g., M10 means D = 10mm) ✅ 3. Choose Thread Tolerance Class Precision Level Application Recommended Class Standard Fit General mechanical parts H2 (2B) Precision Fit Sealing parts, precision assembly H3 or tighter ✅ 4. Coating Options (Optional) Coating Suitable Materials Benefit TiN General materials Increased wear resistance TiAlN Stainless/Hard steel High temperature resistance Uncoated Aluminum, Brass Reduces built-up edge and sticking

Thread Cutting in Metalworking: HSS taps are ideal for cutting threads in carbon steel, alloy steel, stainless steel, aluminum, brass, copper, and other common metals. Industrial Machining & Fabrication: Widely used in CNC machining, mold making, automotive, aerospace, electrical and mechanical parts manufacturing for threaded hole creation. Maintenance & Repair: Used by technicians and engineers for thread restoration or re-tapping damaged threads in machinery and equipment. Workshop and DIY Applications: Suitable for manual tapping in hobbyist and small-scale fabrication projects. ✅ Why HSS is Preferred Excellent wear resistance Maintains hardness at high cutting speeds Good toughness and durability Suitable for repeated use under moderate to heavy loads

Yes, HSS (High-Speed Steel) taps can be used for stainless steel, but with some important considerations: ✅ Why HSS Taps Work for Stainless Steel HSS has good hardness, toughness, and heat resistance, which makes it capable of handling harder materials like stainless steel. Suitable for low to medium production volumes or manual tapping where cost-effectiveness is a factor. ⚠️ Best Practices When Using HSS Taps on Stainless Steel Use the right HSS grade: Choose HSS-E (Cobalt HSS, like M35 or M42) taps for better heat and wear resistance. These are more suitable than regular HSS for stainless applications. Apply proper cutting fluid: Stainless steel tends to work-harden. Using high-performance tapping oil reduces friction and prevents tap breakage. Control the speed and feed: Stainless steel requires lower cutting speeds to reduce heat build-up. Use spiral flute taps for blind holes and straight flute or spiral point taps for through holes to improve chip evacuation.  

These are straight flute general purpose taps which can be used for both machine or hand tapping. They are generally the most economical tool for use on production runs, but are best on materials that produce chips, or where the swarf breaks readily.

Here’s an English comparison guide on how to choose between spiral flute taps, straight flute taps, and forming (roll) taps: ✅ Spiral Flute Taps vs. Straight Flute Taps vs. Forming Taps: How to Choose? Feature Spiral Flute Taps Straight Flute Taps Forming (Roll) Taps Chip Handling Excellent for chip evacuation in blind holes Moderate; chips collect in the hole No chips produced (cold forming process) Best For Blind holes, soft & ductile materials Through holes, cast iron, short blind holes Ductile materials like aluminum, brass, copper Hole Type Blind holes Through holes & shallow blind holes Mostly blind holes Thread Forming Cutting type Cutting type Cold forming—material displaced, not cut Lubrication Need Medium to high Medium High—critical to prevent tap breakage Surface Finish Good Average Excellent—smooth, work-hardened threads Tap Strength Moderate High Very High (no cutting edges) Material Suitability Steel, aluminum, stainless steel Cast iron, steel, brass Soft to medium ductile materials only Tolerance Control Standard Standard High precision, less variation