JINSLU K12-250 4-Jaw Self-Centering Lathe Chuck 250mm 10"
JINSLU K12-250 4-Jaw Self-Centering Lathe Chuck 250mm 10"
JINSLU K12-250 Four-Jaw Self-Centering Lathe Chuck – 250mm / 10 Inch
Upgrade your lathe setup with the JINSLU K12-250 Four-Jaw Self-Centering Scroll Chuck. Engineered for precision machining, this 250mm (10-inch) manual chuck features hardened steel jaws and a self-centering scroll mechanism that makes clamping square, octagonal, and round workpieces fast, accurate, and repeatable. Whether you're a professional machinist or a serious hobbyist, the K12-250 delivers the rigidity and versatility your workshop demands.
Key Features
- 4-Jaw Self-Centering Design: Automatic centering for faster setup and consistent accuracy across a wide range of workpiece shapes.
- Hardened Steel Jaws: Both internal and external jaw sets are precision-hardened for long-lasting durability and reliable grip.
- Two-Piece & One-Piece Jaw Compatibility: Supplied with traditional two-piece jaws; Model K12 is also available with one-piece jaws (including internal and external sets).
- Short Cylindrical Center Mounting: Easy, secure connection — compatible with standard 3-jaw lathe chuck mounting methods.
- Versatile Clamping Range: Handles a wide variety of part sizes thanks to generous internal and external jaw clamping ranges.
- Manual Operation: No power source required — simple, reliable, and suitable for a broad range of lathe machines.
- Customizable: Available with optional external jaw upgrades to expand your clamping versatility.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | JINSLU |
| Model | K12-250 |
| Number of Jaws | 4 |
| Chuck Diameter | 250mm (10 inch) |
| Jaw Material | Hardened Steel |
| Power Source | Manual |
| Internal Jaw Clamping Range (A–A1) | 6–110mm |
| Internal Jaw Jamming Range (B–B1) | 80–250mm |
| External Jaw Clamping Range (C–C1) | 90–250mm |
| Country of Origin | Made in China (Mainland China) |
What's Included
- Self-centering chuck body × 1
- Inside jaws × 4
- Outside jaws (large) × 4
- Safety chuck key × 1
- Mounting bolts × 3
Ideal Applications
The K12-250 is perfectly suited for machining square, octagonal, hexagonal, and round workpieces on manual lathes. Its self-centering scroll mechanism reduces setup time, making it an excellent choice for production runs and precision one-off parts alike.
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Frequently Asked Questions
Q: Is the JINSLU K12-250 four-jaw chuck compatible with standard lathe machines?
A: Yes. The K12-250 uses the same short cylindrical center mounting connection method as standard 3-jaw lathe chucks, making it broadly compatible with most conventional lathe machines that accept a 250mm (10-inch) chuck.
Q: What types of workpieces can the K12-250 self-centering chuck hold?
A: The K12-250 is designed to securely clamp a variety of workpiece shapes, including round, square, octagonal, and other polygonal profiles. The included inside and outside jaw sets expand your clamping versatility even further.
Q: Does the K12-250 come with both internal and external jaws?
A: Yes. The package includes 4 inside jaws and 4 outside (large) jaws, along with a safety chuck key and 3 mounting bolts — everything you need to get started right out of the box.
Q: What is the clamping range of the K12-250?
A: The internal jaws provide a clamping range of 6–110mm (A–A1) and a jamming range of 80–250mm (B–B1). The external jaws offer a clamping range of 90–250mm (C–C1), accommodating a wide variety of part diameters.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.