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3M™ Roto Peen Mandrel 7212, 1 ea/Case

3M™

$45.24 / Each

SKU 7000045884
Legacy SKU 61500036092
UPC 00048011059693
Product Number 7212

The 3M Roto Peen Mandrel grips small flaps containing captive shot for peening of fine tolerance metals components. For use with flap assembly, it is available in three sizes for internal diameters and flat surfaces.

  • Use with Roto Peen Flap Assemblies for die grinders and disc sanders
  • Flap/mandrel assembly is portable for added convenience
  • Available in three sizes for both small and large surface areas
  • For aerospace and other applications in industries with rigorous metal performance standards and specifications
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On it's way to you November 29  

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Minimum Order 1 Item
Order Increment 1 Item
  Multi-Functional
  High Performance
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Product Dimensions
 Imperial Metric
Weight 0 NULL
Width 0 null
Length 0 null
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Shipping Dimensions
Weight 0.9998 lb
Length 6.37795 in
Width 4.68504 in
Height 4.68504 in

PRODUCT FAQ

  1. What is the 3M™ Roto Peen Mandrel 7212 used for?

    The 3M™ Roto Peen Mandrel 7212 is designed to be used with our roto peen flaps for surface preparation and enhancement projects.

  2. How long does each mandrel last?

    Each mandrel can vary in lifespan based on the frequency of use, project type, and user technique. However, they are designed to endure multiple cycles before replacement.

  3. Can it be used on all materials?

    Yes! The Roto Peen Mandrel 7212 can be used across a wide range of substrates types including various metals, composites, and plastics.

  4. Is any training required before using this product?

    Yes, it’s always important to understand how to properly handle personal protective equipment (PPE) and any specialized tools or machinery your application may require prior to use.

  5. ; Where can I buy this product?

    ; You can purchase the 3M™ Roto Peen Mandrel 7212 through our authorized distributors worldwide. Additionally you may reach out to us directly if you need assistance finding a distributor near you!

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
Science in the Service of U.S. Soldiers

The 3M™ Roto Peen Mandrel is a tool designed to provide quick and efficient repair and maintenance to U.S. Army helicopters. It is used to repair components like rotors and rotor hubs in the field. The tool, along with its associated flap assembly, allows peening action using a die grinder or disc sander. The 3M™ Roto Peen Flap Assembly (or TC 330) was qualified and written into military specifications in the early 1970s. It soon spread to other aerospace applications.

Today, the mandrel with a flap assembly is primarily used for aerospace applications. It allows the use of a die grinder or disc sander to perform captive shot peening to repair metal surfaces. The assembly consists of tungsten carbide shot bonded to a flexible polymeric flap gripped by the mandrels attached to the power tool. The spinning flap is held near the surface so that the captive shot hammers the metal surface with each revolution.

3M flap/mandrel assemblies provide convenient portability and are especially effective for precision in-service rework, manufacturing, repair of small areas, and peening holes with diameters down to 1/2 inch (12.7mm). Flaps can also be cut with scissors to peen confined areas or peen into areas with a radius down to 1/16 inch (1.6mm).

Captive shot peening is used for repair or limited access work or when free shot cannot be tolerated. Having the shot used to peen metal surfaces in a captive flap allows for more control and greater access to areas that require this strengthening procedure.

Peening is a process that utilizes compressive surface stress to strengthen metals, improving resistance to fatigue fracture and stress corrosion cracking. The aerospace industry has stringent peening specifications, in which adherence must frequently be documented. Off-spec peening can result in the failure of parts.

3M also provides Almen gauges to provide precise readings of strip deflections to measure peening intensities. The Almen Scale of Peen Intensity measures the curvature of a standardized steel strip when peened on one side. It was adopted by the SAE (Society of Automotive Engineers).

Recommended Applications
  • MRO in aerospace, military and small shop environments
  • For parts that are too large to fit in a peening cabinet
  • Parts that are subjected to mechanical rework and require rework
  • Landing gear assemblies
  • Wing structures
  • Helicopter rotor hub
  • Jet engine support members
  • Peening after grinding
  • Peening before plating
  • Peening of surfaces subject to stress corrosion
  • Peen straightening
  • Peen forming
  • Weld heat affect zone
  • Bond testing
Industries
Brochures, Catalogs & Data Sheets
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