If you’ve ever worked with stainless steel, you know the drill—literally. Chip clogging, tap breakage, inconsistent thread quality, and premature tool wear. These aren’t just minor annoyances; they’re profit killers. Downtime, scrapped parts, and frequent tool changes eat into your bottom line.
At GrewinTools, we engineer solutions, not just tools. Our HSS-PM Spiral Tap DIN371/DIN 376 is specifically designed to tackle stainless steel’s toughest threading challenges head-on.
What Makes This Spiral Tap a Game-Changer?
1. Advanced Material Science: Premium Powder Metallurgy HSS
- Uniform carbide distribution for exceptional wear resistance and thermal stability
- Optimized vanadium & molybdenum content to resist work hardening
- Consistent heat treatment ensuring reliable performance throughout the tool’s life
2. Purpose-Built Geometry: Engineered for Stainless
- 35° right-hand spiral ensures chips eject forward, eliminating clogging
- Reinforced cutting edges reduce built-up edge common in stainless steel
- Generous flute design lowers cutting forces and prevents chip packing
3. Precision You Can Trust: DIN Standard Compliance
- Full DIN371/DIN376 compliance for seamless compatibility with standard tool holders
- ISO Class 2 tolerance for consistently high-quality threads
- Complete size range: M3-M24, covering most stainless steel threading applications

Who Needs This Tool? Solving Real Shop Floor Problems
For Production Managers:
Problem: Frequent tap failures and inconsistent thread quality delaying deliveries.
Solution: Reduce tool-related downtime by over 50% and hit your production targets reliably.
For Procurement Specialists:
Problem: Choosing between expensive European brands and cheaper alternatives that fail prematurely.
Solution: Get German-standard quality at a competitive price point, lowering your cost per threaded hole.
For CNC Programmers & Operators:
Problem: Constant tool changes and parameter adjustments killing machine utilization.
Solution: Our optimized design runs longer with fewer interventions, boosting your Overall Equipment Effectiveness.
For Precision Part Manufacturers:
Problem: Threading deep holes or thin-walled stainless components often leads to scrapped parts.
Solution: Superior chip control and smoother cutting action significantly reduce workpiece damage.
Performance That Speaks for Itself
Case Study: Blind Hole Tapping in 304 Stainless Steel (M8×1.25, 15mm depth)
| Parameter | Standard Spiral Tap | Grewin HSS-PM Spiral Tap |
|---|---|---|
| Cutting Speed | 8 m/min | 12-15 m/min |
| Average Tool Life | 300 holes | 800-1,200 holes |
| Chip-Related Issues | 15-20% | <3% |
| Thread Quality Consistency | 85-90% | 98%+ |
Recommended Parameters (304/316 Stainless):
- Cutting Speed: 10-15 m/min
- Coolant: High-performance oil with EP additives
- Tapping Depth: Up to 3× diameter (2.5× for blind holes recommended)
Why Partner with GrewinTools?
- Specialized Expertise: 15+ years focused exclusively on CNC tooling and metalworking solutions
- Quality You Can Count On: Full traceability from raw material to finished product
- Technical Support Included: Free application analysis and optimization recommendations
- Global Reach, Local Support: Fast delivery and reliable after-sales worldwide
Put It to the Test: Limited-Time Offer
We believe the proof is in the performance. That’s why we’re offering qualified professionals:
- Free Sample Testing: Get hands-on with our tap in your actual working conditions
- Application Optimization: Our engineers will review your parameters and suggest improvements
- First Order Discount: Save 15% on your initial production quantity order

Your Next Step Toward Better Threading
Stop letting stainless steel threading slow you down. The Grewin HSS-PM Spiral Tap DIN371/DIN 376 delivers the reliability, performance, and cost-efficiency your operation needs.
Get Technical Data & Expert Advice:
- Download specs & technical guides: www.grewintools.com or www.gwcarbide.com
- For Russian customers: www.grewintools.ru
- Connect directly for samples or consultation:
- Contact: Lydia Choo
- WhatsApp: +86-18673327292
- Email: info@gwcarbide.com
- Additional product lines: www.coweecarbide.com
Mention your specific material, application, and challenges when reaching out for personalized recommendations.
Engineered by GrewinTools Technical Team. Performance data based on laboratory testing under ideal conditions. Real-world results may vary. Always test under your specific operating conditions.