► RÖHM | Expanding Mandrels

CNC Internal Clamping Mandrels for Precision Machining

Machining hollow components requires a workholding solution that grips securely from the inside while leaving external surfaces accessible for cutting. Röhm | Expanding Mandrels provide precision internal clamping mandrel systems that allow machinists to hold cylindrical parts from the bore during turning, grinding & finishing operations.

Across CNC turning centres & cylindrical grinding machines, expanding mandrels are widely used when machining bushings, bearing rings & hollow mechanical components. Internal clamping distributes gripping pressure evenly along the bore which helps maintain concentricity during machining operations.

Within internal workholding setups expanding mandrels operate most closely alongside Röhm | Mandrels & Accessories, which provide additional mandrel systems used to secure cylindrical parts during machining.

Alongside internal clamping technologies many workshops configure specialised setups using Röhm | Segment Clamping Mandrels & Röhm | Centres & Accessories when machining components between centres or using internal gripping methods.

Beyond mandrel systems machinists frequently rely on alternative workholding methods including Röhm | Jaws & Sets, Röhm | Sliding Block, Röhm | Set of Top Tooling & Röhm | Face Drivers & Accessories when external gripping or shaft driving techniques are required.

Engineered with hardened expansion sleeves, precision-ground contact surfaces & balanced construction Röhm expanding mandrels deliver stable internal gripping while maintaining the alignment required for high-accuracy CNC machining.

What’s in This Collection:

► Röhm Expanding Mandrels
‣ Internal clamping mandrels designed to grip cylindrical components from the bore during machining

► Precision Expanding Mandrel Systems
‣ High-accuracy mandrels engineered for turning & cylindrical grinding operations

► CNC Expanding Mandrels
‣ Mandrels designed for CNC lathes & grinding machines requiring precise internal workholding

► Internal Clamping Mandrels
‣ Workholding systems used to secure hollow components from the bore

► Expanding Mandrel Sleeves
‣ Expansion elements that distribute gripping force evenly inside the component bore

► Mandrel Mounting Interfaces
‣ Components used to install expanding mandrels onto machine spindles

► Replacement Expanding Mandrel Components
‣ Service parts used when maintaining internal mandrel workholding systems

Machining workshops commonly use expanding mandrels when producing bushings, bearing rings & precision cylindrical components that require concentric machining.

Trade Applications for Röhm | Expanding Mandrels

Expanding mandrels are widely used in machining environments where internal clamping is required to maintain concentric machining accuracy.

► Precision Bushing Machining
‣ Secure bushings internally while machining the outer diameter

► Bearing Ring Manufacturing
‣ Maintain accurate concentricity when machining bearing races

► CNC Turning of Hollow Components
‣ Clamp cylindrical parts internally when external gripping is unsuitable

► Cylindrical Grinding Operations
‣ Hold precision parts during external diameter grinding

► Gear Blank Production
‣ Support internal clamping of gear blanks during machining

► Toolroom Component Manufacturing
‣ Secure prototype components requiring accurate bore clamping

Internal clamping distributes gripping pressure evenly across the bore which improves machining stability during turning & grinding operations.