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3M™ Roto Peen Flap Assembly

Products
  • Flap/mandrel assembly is portable for added convenience
  • Tungsten carbide shot is bonded to the flaps, providing a cleaner peening method than loose shot "blasting"
  • Available in three flap sizes for both small and large surface areas
  • Especially effective for precision in-service rework, manufacturing, repair of small areas, and peening holes
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Specifications
Attribute Name
Value
Application
Coating Removal, Concrete Cleaning, Descaling, Heavy Duty Steel Cleaning
Brand
3M™
Color
Yellow, Goldenrod
Kit Type
Roto Peen Flap Assembly Kit
Length
1 in, 1.25 in, 2 in
Length (Metric)
25.4 mm, 31.75 mm, 50.8 mm
National Stock Number
5130005330235, 5345016148851
Width
0.56 in, 1 in
Width (Metric)
14.224 mm, 25.4 mm
Product Details
  • Flap/mandrel assembly is portable for added convenience
  • Tungsten carbide shot is bonded to the flaps, providing a cleaner peening method than loose shot "blasting"
  • Available in three flap sizes for both small and large surface areas
  • Especially effective for precision in-service rework, manufacturing, repair of small areas, and peening holes
  • Imparts a compressive residual stress that benefits the material by strengthening its durability

Our 3M™ Roto Peen Flap Assembly effectively peens a variety of metals.

Our 3M™ Roto Peen Flap Assembly, made with a flap and mandrel, was designed using captive shot-flap technology. To create this unique and portable assembly, we adhered tungsten carbide shot to flexible flaps using high-strength resin. Two flaps are bonded together with a special adhesive for easy placement in a flap mandrel.

Peening, a cold working process for metal, applies repeated stress to the material's surface and strengthens it through compression. The peening method (PDF, 206 Kb) helps improve the material's ability to resist fracture, fatigue and stress corrosion cracking. In traditional shot peening methods, the work surface is sprayed with cast steel shot. While this method is also effective, it has a tendency to dirty the operator's environment by releasing debris. Additionally, the tools required for this method limit the spaces where an operator can peen.

3M™ Roto Peen Flap Assembly
Peen surface with a circular motion. Tool must be pre-set to a constant torque
Our 3M™ Roto Peen Flap Assembly does not require a sandblaster or the accompanying abrasive materials, as the tungsten carbide shots are already adhered to the flap. The benefits of this unique construction are twofold. First, peening is cleaner because debris is not released as the flaps abrade the surface. The captive shot flaps provide a more precise method than loose shot "blasting." Second, the assembly is portable, making it more convenient for operators to use.

Flap/mandrel assemblies are especially effective for precision in-service rework, manufacturing, repair of small areas and peening holes. The 3M™ Roto Peen Flap Assembly comes in three sizes and allows for peening a variety of surfaces and radii area. Plus, the uniform TC-330 shot size contributes to consistent results. As the part is peened, a compressive residual stress is created. It's a non-yielding layer that increases the material's ability to fight fatigue, stress and fracturing.

Flap rotation speed is the most important factor affecting peening intensity. Increasing the speed of rotation increases the intensity. Conversely, decreasing the speed decreases the intensity. To ensure uniform peening coverage, operators should use a circular or oscillating motion over the entire area.

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Large Volume Order

If you are considering a large purchase of this or other 3M Abrasive products our inside sales team is ready to help by providing additional information and options that our industrial customers typically seek when making abrasive procurement decisions. Our technical expertise, customer support, and global capabilities put us in a unique position to address your biggest challenges, and we’ll do our best to prove that we should be your abrasive supplier of choice.


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