Expansion Mandrels TRIZ Cases

Nested interlocking jam chuck inserts create frictional grip for different woodturning workpiece sizes without swapping multiple custom chucks.

An auxiliary spindle with a fixed counter bearing and mandrel improves rigidity, synchronization, and tool exchange for small grinding worms.

An expansion sleeve and draw pin speed collet change-out while improving alignment, concentricity, and run-out control.

A synchronously driven central gear lets clamping jaws hold varying diameters with adjustable force while preserving stable clamping position.

A rigid collet body with a removable head and sliding pusher delivers uniform internal clamping force and reduces workpiece misalignment.

A taper-clamped hob cutter uses elastic axle loading and reusable steel cutting parts to keep precision while lowering shock sensitivity and cost.

A compensating membrane and hollow chamber absorb hydraulic fluid expansion, keeping clamping force stable during temperature changes.

Pressurized fluid expands a sleeve to move radial locators, securing cylindrical workpieces without collar contact for precise gauging and machining.

A wedge sleeve and support claw ring combine internal and external clamping to stop thin-wall tube slipping during rotary processing.

Elastic shank interfaces and a clamped axle let hob cutters keep true running while improving shock resistance and cutting-part replacement.

A central gear and linear drives expand clamping range and force for rods and tubes while preventing hollow workpiece deformation.

Piezo actuators shift and probe the clamped workpiece for fast coaxial or eccentric alignment, cutting setup time in spindle-driven machining.

Independent piston chambers expand or retract clamping sleeves to selectively grip multiple workpieces, including small inside diameters.

An internal expansion mandrel grips the wheel through its pre-hole, enabling both-face machining without flipping to cut time and protect rolling-surface accuracy.

A lathe clamp grips tubular workpieces at one end while a rotary tool holder slides along the axis to machine inaccessible sections.

Replaceable spreader elements between movable holding sections adapt the device to various container diameters and enable microwave heating compatibility.

An axially adjustable stop piece and radial tool movement enable machining of internal diameters exceeding one meter without deforming the workpiece.

A machining tool tip uses a sliding thrust axis to expand and contract gripping fingers for precise internal clamping.