Overview
Blind-hole tapping requires taps capable of lifting chips upward to prevent chip packing and tool breakage. The ADDTHREAD SUPER Spiral Flute tap is engineered to deliver stable tapping performance in blind-hole applications.
Customer Challenge
Manufacturers tapping blind holes experienced:
- Chip clogging inside the hole
- Frequent tap breakage
- Reduced productivity
The requirement was a tap capable of efficient chip evacuation and improved durability.
Addison Solution
Tool Used: ADDTHREAD SUPER Spiral Flute Tap Specifications
- Tool Material: HSSE (M35)
- Coating: TiN
- Standard: DIN371
- Application: Blind hole tapping
The spiral flute design enables efficient upward chip evacuation, preventing chip accumulation.
Application Details
Customer: Madras Engineering, Pillaipakkam
Component: Slack Adjuster
Material: SG Iron
Hardness: 210 – 240 BHN
Tap Size: M4 × 0.7P – 6H
Additional application tested on SS316 components for machine feeding plates.
Performance Results
Tool Life Comparison in Blind Hole Tapping
SG Iron Application
Tool Tool Life
ADDTHREAD SUPER Spiral Flute 3500 holes
Competitor Tap 3000 holes
Stainless Steel Application
Tool Tool Life
ADDTHREAD SUPER Spiral Flute 106 holes
Competitor Tap 20 holes
These results demonstrate dramatically improved tapping performance in difficult materials such as SS316.
Key Benefits
✔ Excellent blind-hole tapping performance
✔ Efficient chip evacuation
✔ Reduced tap breakage
✔ Higher productivity in difficult materials
