Flap Peening Mandrels

Precision Mandrels for Reliable Flap Peening Setups

Match your flap size with the correct mandrel to achieve stable RPM, consistent contact, and repeatable intensity. These robust mandrels are engineered for quick changeovers and precise on-tool peening on edges, radii, and internal features-whether you work with a flexible-shaft drive or a pneumatic tool.

Technical Data:

• Available references and sizes:
  • Flaps 9/16" � 1" (shaft ?6.35 mm)
  • Flaps 9/16" � 1 1/4" (shaft ?6.35 mm)
  • Flaps 1" � 2" (shaft ?9.5 mm)
• Typical shaft lengths: 7.7 cm (?6.35 mm) and 20.2 cm (?9.5 mm) for reach and stability
• Standards: Conformance to AMS 2590 and AMS 2592 when used in a compliant flap peening process
• Drive compatibility: Flexible-shaft motors and pneumatic flap-peening tools
• Build: Rigid construction for minimal runout and reliable speed control
• Changeover: Quick fit to reduce setup time between flap sizes

Frequently Asked Questions

Which mandrel should I choose?

Pair the mandrel with the flap size: 9/16" � 1", 9/16" � 1 1/4" or 1" � 2". This ensures proper geometry, balance, and coverage.

Will these mandrels fit my handpiece or chuck?

Most handpieces accept ?6.35 mm (1/4") shafts. The 1" � 2" mandrel uses ?9.5 mm; if your chuck is 9 mm, you may need a reduced-diameter version or machining to ?9 mm-check your tool's chuck spec before use.

What RPM should I run?

Follow your process specification (e.g., AMS 2590/2592) and verify with a calibrated digital tachometer. Stable RPM is key to achieving the target intensity and coverage.

Any setup tips for consistent results?

Confirm flap size/mandrel match, set and verify RPM, and validate intensity with Almen strips and an Almen gage during setup. Re-check RPM periodically during production.

How do I maintain the mandrels?

Inspect shafts and seating surfaces regularly for wear or runout, keep the chuck clean and properly tightened, and replace damaged components to avoid vibration or inconsistent peening.