3-Jaw Lathe Chuck 4-Inch, Self-Centering, Reversible Jaws

3 jaw self centering lathe chuck delivers fast, repeatable clamping for accurate turning, milling, and drilling with less setup time. Built for small-to-large workpieces, this 4-inch chuck uses a hardened scroll and reversible jaws to cover internal and external gripping. A compact, shop-ready design pairs smooth T-key adjustment with stable concentric performance for cleaner cuts and consistent part holding across your machining workflow.

• Delivers self-centering clamping to reduce recalibration and speed up changeovers


• Fits internal and external gripping with reversible jaws for 2–100 mm workpiece range


• Includes T-key and fixing screws for straightforward install and quick jaw adjustment


• Handles metalworking loads with hardened jaws and scroll for stable, repeatable holding


• Supports lathes, machining centers, milling and drilling setups for versatile shop use

When concentricity and secure grip matter, this 4-inch self-centering chuck helps keep your parts aligned and your workflow efficient. The geared scroll mechanism moves all three jaws together for predictable clamping, while the dual jaw sets expand what you can hold without swapping chucks. Keep it on your bench for prototyping, repair work, or production runs where consistency saves time. Grab yours today and upgrade your everyday workholding setup.

• Chuck type: 3-jaw self-centering


• Chuck outside diameter: 4 in (100 ± 5 mm)


• Clamping range (internal jaws): 2–30 mm (0.078–1.18 in)


• Clamping range (external jaws): 35–100 mm (1.38–4 in)


• Bore: Ø22 mm


• Body material: HT300


• Jaw material/hardness: 20Cr, ≥53 HRC


• Scroll material/hardness: 40Cr, ≥45 HRC


• Bearing tolerance: ≤0.05 mm (0.002 in)


• Fixing thread: 3 × M8


• Surface finish: Ra ≤ 0.8, oiled


• Product size: Ø100 × 120 mm


• Net weight: 2.96 kg (6.5 lb)