CNC workholding fixtures locate, support and clamp a workpiece for machining. ROTIVEX helps buyers review fixture requirements for machining centers, rotary tables and indexing applications, then coordinate suitable sourcing options.
Common Workholding Concepts
Start with the part shape, then confirm location, support and clamping.
Prismatic parts
Vise or fixture-plate concepts for block-shaped workpieces.
Round parts
Chuck or collet concepts for circular workpieces.
Irregular parts
Dedicated locating and support concepts for shaped workpieces.
Choosing a Workholding Approach
Block-Shaped and Prismatic Workpieces
A vise, fixture plate or modular arrangement may be considered for parts with suitable reference surfaces. Check how the part will locate consistently, where it needs support and whether the clamps leave the required machining faces accessible.
Round and Cylindrical Workpieces
Chuck or collet concepts may be suitable when the part geometry provides an appropriate gripping surface. Review gripping length, tool access, workpiece distortion and the mounting interface. Explore our chuck options when assessing this approach.
Irregular or Application-Specific Workpieces
Castings, forgings and parts with uneven reference surfaces may need dedicated locating and support arrangements. Send a part drawing and machining requirements so the proposed approach can be reviewed. Availability, design scope and quotation depend on the application and supplier confirmation.
When should you consider high-density workholding?
High-density workholding places several workpieces in one setup. Before choosing a layout, check whether every part can be located, clamped and reached by the required tools. More clamping positions alone do not establish a suitable machining setup.
- Tool and holder access: leave space around each part for the intended operations, probing and loading.
- Complete setup load: include all workpieces, fixtures and clamps when reviewing machine and rotary-table limits.
- Chip clearance: review chip evacuation and access for cleaning between cycles.
- Production needs: state batch size, part variation and the loading process before comparing layouts.
For an initial review, send the part drawing, machine model and target number of parts per setup. Specific fixture components, supply scope and suitability require application review and supplier confirmation.
Workholding for Rotary and Indexing Applications
Check the complete assembly, including the workpiece, fixture, chuck and clamps. Confirm mounting dimensions, total mass, load offset and clearance through every required position. Provide the machine and table model so the applicable load and moment limits can be reviewed.
For MRNC-255 / 255N and MRNC-320 / 320N setups, use our MRNC model comparison to review the combined workholding load and installation requirements. Final suitability depends on the complete machine, table and fixture configuration.
- For indexing between cuts, review the required angles and clamping sequence with our CNC index table options.
- For rotary and tilting setups, check the swept envelope and tool access using our 5-axis rotary table selection guide.
What to Confirm Before Selecting a Fixture
- Location and support: identify the reference surfaces, locating features and supported areas of the part.
- Clamping and part condition: review cutting forces, potential movement and deformation of thin or flexible sections.
- Machining access: check tool and holder clearance, chip evacuation and access to all required features.
- Machine interface: confirm mounting details, available space, manual or powered operation and any hydraulic or pneumatic supply.
- Repeatability and production: state the required part tolerance, batch size and loading process. Fixture repeatability alone does not guarantee finished-part accuracy.
Frequently Asked Questions
Can you review a fixture requirement without a fixture drawing?
Start with the part drawing or dimensions, machine model and machining operations. Include material, weight and tolerance requirements. These details help establish whether a standard or application-specific approach should be reviewed.
Are the illustrations products available to order?
The illustrations explain general workholding concepts. They do not identify stocked products. Specific configurations, technical details, pricing and availability are confirmed after reviewing your requirements.
Tell Us Your Requirements
Send the following information for an application review and sourcing quotation:
- Part drawing or dimensions, material and weight
- Machine make/model and rotary or index table model, if used
- Machining operations, surfaces to access and required tolerances
- Existing fixture details, mounting interface and installation space
- Preferred manual, hydraulic or pneumatic operation and available supply
- Batch size, quantity and delivery destination