IMG_8096_Crop
Ottet expansion collet machining
![Odoo • Image et Texte](/web/image/177217/IMG_8096_Crop.jpg?access_token=174a17fb-d5d3-443b-9f2d-9edc25e1880a)
Custom machining of an Ottet collet enables uniform clamping of a thin annular part.
Usually also works very well for non-circular parts.
For optimum repeatability, care must be taken with deburring and attention must be paid to possible radii or chamfers on the finishing cutter if the workpiece to be clamped has a sharp angle on the clamping diameter.
For cylindrical parts, indexing with a pin inserted in the collet is generally the simplest solution.
For collets with top clamping it is also possible to position the NC with a pin in a tool holder (or broken cutter mounted upside down). Place the workpiece on the collet in the NC, press it against the pin and collet.
This method allows more freedom to machine the complete contour of the part. For example, when machining a case middle from a blank or for reworking during the second operation.
To facilitate machining and ensure a good surface finish, it is advisable to constrain the collet with a 2-piece ring or flange.
![](/web/image/177216/IMG_8094_Crop.jpg?access_token=8f46c488-dc85-4190-9dca-c5d04cef782d)
Machining with a ring : To machine the surface and/or part of the height of the pallet
![](/web/image/177215/IMG_8095_Crop.jpg?access_token=d6439673-f83e-4a76-84e9-d84cd35083a7)
Machining with 2-part flange (Øint 16mm): Allows the full height of the pallet to be machined
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