4 Inch 4 Jaw Independent Lathe Chuck With Solid Hard Jaws, 1 To 10 TPI Back Plate, Semi Machined Three Point Nine Three Inch Backing Plate, Machining Required, Beefy Pro Grade Workholding For Metalworking
This item is a 4-inch, four‑jaw independent lathe chuck that pairs with a semi‑machined backing plate. It’s designed for metalworking applications where precise, adjustable grip is needed on round stock, and it requires machining to fit your lathe’s back plate mounting.
Back plate diameter 3.93 inches (99.8 mm); compatible chuck diameter 4 inches (101.6 mm). Mounting uses 1-10 threads per inch (TPI); bolt circle 3.307 inches (84.0 mm); thru hole 0.984 inches (25.0 mm). Chuck thickness 2.126 inches (54.0 mm); total indicated runout (TIR) 0.005 inches (0.127 mm).
✅ Chuck: 4" diameter (101.6 mm) with 4 independent jaws
✅ Back plate: 3.93" diameter (99.8 mm) semi‑machined with 1 x 10 TPI
✅ Mounting: 1-10 TPI; bolt circle 3.307" (84.0 mm)
✅ Thru hole: 0.984" (25.0 mm); TIR 0.005" (0.127 mm)
✅ Chuck thickness: 2.126" (54.0 mm); includes back plate p/n 202-6107-6
✅ Includes: 1 pc 4" 4-jaw chuck (p/n 202-5419) and 3.93" back plate (p/n 202-6107-6)
💡 What is a lathe chuck used for?
A lathe chuck is a handy tool for securing round stock on a turning lathe to perform precise operations. - Provides secure, repeatable grip on round workpieces for turning - Independent jaw action allows centering and clamping of irregular shapes - Back plate machining is often required to fit a specific lathe mounting (1-10 TPI) - A solid workholding option for metalworking projects requiring accurate concentricity ✝️