EF: Tools for concave fillets (internal and external)

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Burnishing

EF Single Roller Tools

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Tools for concave fillets (internal and external)

ECOROLL single-roller tools are usually used for roller burnishing. They machine a wide range of complex contours and surfaces such as concave fillets and grooves as well as cylindrical and conical outer surfaces and bores. 

These tools comprise series EG, EF and FAK. EG tools are divided into tool families EG5, EG14, EG45 and EG90. They burnish cylindrical outer surfaces and bores, conical bores, plane surfaces and fillets. For deep rolling of fillets and thread root radii EF, FAK and FA tools are used. 

Single-roller tools consist of a tool body equipped with a tool shank, a spring assembly that allows the roller head to move with no play and very low friction, and a gauge that indicates the burnishing force as measured by spring deflection. The roller head is attached to the flexible, spring-loaded section of the tool body. 

With these tools for example bores, con rods, housings, axles and flywheels are able to be machined.

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  • For use on conventional or CNC lathe.
  • Complete machining with one chucking.
  • Can be used as right or left-handed tool.
  • Both directions of rotation possible.

 

Characteristics:

  • For machining of turned parts' fillets, like shafts, screws, tension bars, torsion bars.
  • Deep rolling by plunging method.
  • A floating roller.
  • Rolling force monitoring with gauge or inductive position measuring system.

Basic construction:

  • Type EF deep rolling tools consist of a tool body equipped with a shank, a spring assembly that allows the roller head to move with no play and very low friction, and a dial gauge that indicates the burnishing force as measured by spring defl ection.
  • An optional device transmits the values by cable or wireless signal to an external indicator.
  • The roller head is attached to the flexible, spring-loaded section of the tool body. The flexible roller retainer moves in response to the radial or axial rolling forces on either side of the tool.
  • The roller is guided by a cage and supported by a support body with large-scale needle bearings.

Characteristics:

  • Deep rolling of thread root radii (external).
  • Deep rolling in the machine's thread-cutting cycle.
  • Axially floating roller provides compensation of minor positioning errors.
  • Automatic angle adjustment of the roller for differing gradients.
  • Machining of right or left-hand threads with no alterations required.

Basic construction:

  • Type EF deep rolling tools consist of a tool body equipped with a shank, a spring assembly that allows the roller head to move with no play and very low friction, and a dial gauge that indicates the burnishing force as measured by spring deflection.
  • An optional device transmits the values by cable or wireless signal to an external indicator.
  • The roller head is attached to the flexible, spring-loaded section of the tool body. The flexible roller retainer moves in response to the radial or axial rolling forces on either side of the tool.
  • The roller is suspended within the roller retainer with a slide bearing bolt. In addition, the roller mount swings such that the roller automatically adjusts to the thread pitch. A set screw limits the roller’s pivoting angle.

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