Expanding Mandrel Fixtures

Scope and process

Engineering workflow for expanding mandrel fixtures at Dahegam, Gandhinagar, Gujarat, India: 3D CAD modeling of part workholding envelope → FEA clamping force and deflection analysis → CNC machining of hardened baseplates and locator nests → grinding of locating dowels and wear pads → laser CMM verification of critical datum points.

Materials we work with

Hardened and ground mandrel body with a sleeve or segment set matched to the bore tolerance band. Body material is chosen for the duty — tool steel where wear or heat is the issue, aluminium where the fixture must be lifted by hand.

Tooling support

Locates internally, expanding against the bore to centre and grip in one movement.

Choosing the right option

When requesting a proposal for expanding mandrel fixtures, please provide component 3D CAD models (STEP/IGES), 2D part drawings indicating critical datums, machine table specifications (T-slot pitch, pallet size), and target cycle time. Quotes with 3D concept layouts are issued within 24 hours.

Quality checks and inspection

On a fixture the check that matters is expansion range, concentricity to the mount, and grip retention under cutting load. Dimensions are verified on CMM against the fixture drawing before despatch.

Commissioning and handover

Handed over with a proving part run on your machine, so grip and runout are demonstrated on the actual spindle rather than on a bench.

Export packing and lead time

Ships assembled in a fitted case with the collet or mandrel set, so nothing is mis-paired on arrival. HEMSUN is a DGFT IEC registered exporter (Government of India); commercial invoice, packing list and certificate of origin accompany international despatch.

Maintenance and spare parts

The gripping element is the wear part; keep a spare set and change it when repeat grip drifts rather than when it visibly wears.

Specifications