# Workholding

Magnetic and vacuum chucks, vises, clamps, locators and fixtures for holding parts during machining.

[Manufacturing Wiki](https://planar.so/wiki/index.md)

- [Collet chucks](https://planar.so/wiki/tooling/workholding/collet-chucks.md): Workholding collet chucks for turning, axial location, gripping range, force limits and scoped runout specifications.
- [Expanding mandrels](https://planar.so/wiki/tooling/workholding/expanding-mandrels.md): Internal-bore workholding, expanding sleeve designs, axial location, diameter ranges, runout, and product-specific force and speed limits.
- [Fixed-jaw machine vises](https://planar.so/wiki/tooling/workholding/fixed-jaw-machine-vises.md): Fixed-jaw location, movable-jaw clamping, pull-down mechanisms, mounting and product-specific force limits for machining vises.
- [Fixture plates](https://planar.so/wiki/tooling/workholding/fixture-plates.md): Fixture-plate grids, locating bores and threads, mounted geometry, material choices and the limits of pitch, tolerance and torque specifications.
- [Four-jaw independent chucks](https://planar.so/wiki/tooling/workholding/four-jaw-independent-chucks.md): Independent jaw adjustment, eccentric workholding, centering measurements and assembly-specific mounting, force and speed limits.
- [Magnetic chucks](https://planar.so/wiki/tooling/workholding/magnetic-chucks.md): Magnetic workholding circuits, switching systems, contact limitations and the distinction between pull-off force and cutting-load resistance.
- [Rotary tables](https://planar.so/wiki/tooling/workholding/rotary-tables.md): Machining rotary-table indexing, simultaneous control, angular accuracy, torque and workpiece-support limits.
- [Self-centering vises](https://planar.so/wiki/tooling/workholding/self-centering-vises.md): Opposed jaw motion, center versus fixed-jaw datums, centering specifications, shallow gripping and product-specific force and torque limits.
- [Soft jaws](https://planar.so/wiki/tooling/workholding/soft-jaws.md): Machinable chuck and vise jaws, loaded machining, mounting interfaces, contact geometry and limits on force, speed and accuracy.
- [Steady rests](https://planar.so/wiki/tooling/workholding/steady-rests.md): Lathe support arrangements, self-centering rollers, contact geometry and the separate limits on diameter, loading clearance, force and speed.
- [Strap clamps](https://planar.so/wiki/tooling/workholding/strap-clamps.md): Rigid clamp straps, heel supports and threaded load paths, with lever-force calculations and limits on contact, access and torque.
- [Tailstock centers](https://planar.so/wiki/tooling/workholding/tailstock-centers.md): Live and dead centers, center-hole contact and taper mounting, combined loads, and axial thermal-growth compensation.
- [Three-jaw scroll chucks](https://planar.so/wiki/tooling/workholding/three-jaw-scroll-chucks.md): Synchronized manual chuck jaws, centering limits, jaw configurations, mounting and the distinction between static gripping force and rotating conditions.
- [Toe clamps](https://planar.so/wiki/tooling/workholding/toe-clamps.md): Low-profile edge restraint, cam and wedge mechanisms, contact choices and the separate meanings of clamp travel, screw torque and holding force.
- [Toggle clamps](https://planar.so/wiki/tooling/workholding/toggle-clamps.md): Over-center linkage, holding capacity versus applied clamping force, spindle position, pneumatic examples and fixture-load paths.
- [Tombstone fixtures](https://planar.so/wiki/tooling/workholding/tombstone-fixtures.md): Multi-face tooling columns, locating interfaces, fixture mass, rotary clearance and the limits of geometric accuracy specifications.
- [Trunnion fixtures](https://planar.so/wiki/tooling/workholding/trunnion-fixtures.md): Rotating fixture structures, indexing and simultaneous motion, support interfaces, hydraulic services and the distinction between mass, moment and inertia.
- [Vacuum chucks](https://planar.so/wiki/tooling/workholding/vacuum-chucks.md): Pressure-difference workholding, effective sealed area, leakage and lateral restraint, with product examples and a bounded force calculation.
- [Zero-point clamping systems](https://planar.so/wiki/tooling/workholding/zero-point-clamping-systems.md): Repeatable fixture interfaces, locating studs, pull-down and holding force, actuation variants and the limits of mounting accuracy.