Deep rolling of API-thread pin
Task
lncrease of the fatigue strength of API-thread pin
Solution
Deep rolling the root radius with the EF90 tool
User benefits
- Fatigue strength increased by about 40%
- Life time increased by about 15%
Details
- Workpiece: API-thread pin
- Part of: Drill pipe
- Material: 42 CrMo 4 V
- Tensile strength: 1200 N/mm2
Parameter
- Tool: EF90
- Rotation speed: 53 RPM
- Feed rate: 6,35 mm/rev.
- Rolling force: 8500 N
- Cycle time: ≤ 1 minute
DOWNLOAD Application Example API thread pin
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ECOROLL AG - Deep rolling of API thread pin Life time increased by about 15%