Section 05 / 18
Workholding & Toolholding
Spindle interfaces, toolholders, chucks, vices and fixture design — the 3-2-1 principle and what clamping does to a thin part.
- Live
- 5
- Pages planned
- 36
- Subsections
- 4
- Release phase
- Phase 2 months 3–9
Live pages
- 05 Spindle interfacesSpindle interfaces: 7:24 steep taper, dual contact and HSKHow the toolholder meets the spindle: the 7:24 steep taper that touches only on its cone, the dual-contact version that also seats on the face, and the hollow 1:10 HSK taper clamped from inside. What happens to each as the spindle speeds up, and where the makers’ claims end and independent data begin.
- 05 ToolholdersTool runoutHow far a cutter turns off its true axis: what that does to the load on each tooth, to the hole and the surface, and to tool life; where and how to measure it; what toolholder makers state for their chucks; and the usual causes in the shop.
- 05 ToolholdersShrink-fit, hydraulic, milling and collet chucksFour ways to grip a round shank: the heated bore of a shrink-fit chuck, the oil chamber of a hydraulic chuck, the needle-roller nut of a milling chuck and the collet. How each one clamps, what it asks of the shank, what the makers claim and why their runout figures cannot be compared.
- 05 WorkholdingChuck gripping force and spindle speedWhy a jaw chuck grips less as it turns faster: the centrifugal force of the jaws, how Röhm and Schunk calculate it, the safety factors Schunk takes from VDI 3106, the two-thirds limit, the speed marked on the chuck, what jaw mass and radius do, and why grease and a force gauge matter. With a calculator built on a Kitagawa chuck’s published figures.
- 05 Fixture designThe 3-2-1 locating principleHow a fixture puts every part in the same place: six degrees of freedom, three locators on the first plane, two on the second, one on the third, and clamps that hold the part against them. Redundant locating, extra supports, pins for holes, V-blocks, and the points only one source makes.
Section map
The subsections of this section and the number of pages planned in each. Pages go live in section order, all on the same template.
- 5.1Spindle interfaces1/8
- 5.2Toolholders2/10
- 5.3Workholding1/11
- 5.4Fixture design1/7
In production 5 of 36 planned pages are live. The figure on each subsection is pages live / pages planned.