Machine Tool Accessories

Expanding Mandrels

Browse TOP-TOOL expanding mandrels and internal expanding collet chucks for CNC workholding applications. This collection focuses on internal expansion clamping solutions for through-hole and blind-hole workpieces, including Rubber-Flex expanding collet chucks and expanding collet elements.

Browse Expanding Mandrels by Type

Blind-Hole Expanding Chucks

Internal expanding chuck assemblies for blind-hole or semi-through-hole workpieces where outside clamping is not suitable.

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Blind-Hole Expanding Collets

Rubber-Flex expanding collet elements for internal clamping where the bore does not pass fully through.

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Through-Hole Expanding Chucks

Internal expanding chuck assemblies for through-hole workpieces requiring broad internal support and repeatable clamping.

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Through-Hole Expanding Collets

Rubber-Flex expanding collet elements for through-hole internal clamping applications.

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Select an Expanding Mandrel for Your Application

Start with the workpiece bore type, clamping diameter and required support method. Blind-hole expanding products are used when the bore does not pass fully through. Through-hole expanding products are used when internal clearance passes through the workpiece. Choose between a chuck assembly and a replaceable expanding collet according to the fixture layout and repeatability requirement.

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Type de produit
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Marque
Chuck Size
Clamping Range
Expanding Mandrel Type

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Le prix le plus élevé est de $0.00
Type de produit
Mount Type
Marque
Chuck Size
Clamping Range
Expanding Mandrel Type

Expanding Mandrels FAQ

What is an expanding mandrel?

An expanding mandrel clamps the workpiece from the inside diameter. It is used when internal expansion clamping is preferred over outside gripping.

What is the difference between blind-hole and through-hole expanding clamping?

Blind-hole expanding products are used when the workpiece bore does not pass fully through. Through-hole expanding products are used when the internal bore passes through the workpiece.

What is the difference between an expanding chuck and an expanding collet?

An expanding chuck is a complete chuck assembly. An expanding collet is the replaceable clamping element used within a compatible expanding or Rubber-Flex system.

Can expanding mandrels be used for thin-wall workpieces?

Internal expanding clamping can support thin-wall or surface-sensitive workpieces when broad internal contact and proper clamping range are selected.

Are these expanding mandrels available for direct online purchase?

These expanding mandrel and internal expanding collet configurations are supplied by quotation so that the bore size, clamping range and workholding requirements can be confirmed before ordering.

Need Help Selecting an Expanding Mandrel?

Send your workpiece drawing, bore diameter, clamping range, machine information and quantity. We will review the application and recommend a suitable expanding mandrel or internal expanding collet configuration.

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