GY 6300 Independent 4 Jaw Chucks

With D1 Type Plates

Engineered for maximum versatility and clamping force, our 4-jaw independent chucks (often referred to as Dog Chucks) are indispensable tools for heavy-duty lathe machining. Unlike self-centering chucks, each jaw on an independent chuck moves separately, adjusted by a heavy-duty Acme-threaded screw. This allows for precise, individual positioning, making them ideal for holding non-cylindrical, irregular, or unbalanced workpieces with unmatched accuracy.

Key Features

Construction & Material Specifications
Our Independent 4 Jaw chucks are engineered for high-precision performance and long-term industrial use. Equipped with D1 Type Plates (Camlock) for specialized spindle noses.
    • Premium Chuck Bodies: Available in three configurations to match your RPM and durability requirements:
      • High-Tensile Cast Iron: Alloyed with Chromium, Nickel, and Manganese for superior wear resistance (Hardness: 210 BHN).
      • SG Iron (500/7 Grade): Designed for high-speed operations and extended service life (Hardness: 210 BHN).
      • Nickel-Chrome Alloy Steel: Features hardened and ground jaw ways for maximum accuracy and high-RPM stability (Hardness: 45 HRC).
    • Generous Through-Hole: Designed with large bore diameters to accommodate bar stock and long workpieces easily.
    • Hardened Jaws: Constructed from low-carbon alloy steel, case-hardened to 62 HRC, and ground on both sides to ensure a smooth fit and perfect pitch.
    • Durable Pinions: Made from specialized alloy steel and case-hardened to 50 HRC for high torque resistance.
    • Included Accessories: Every chuck includes a high-strength operating key and a full set of mounting bolts.
    • Extensive Size Range: We offer a comprehensive selection of sizes, from compact 85mm (3.1/4″) units up to heavy-duty 500mm (19.3/4″) chucks.

Accessories Included

Every Chuck comes ready for immediate setup with a comprehensive set of standard accessories:
  • 1 Set Solid Reversible Jaws Set
  • 1 Pc. Chuck Operating Key
  • 1 Set of Mounting Bolts
Looking for more flexibility? Optional accessories including Soft Solid Jaws. are also available to customize your setup.

Applications

  • Heavy Machinery: Machining large flanges, gears, and castings.
  • Maintenance & Repair Workshops: Ideal for handling one-off, unique, or damaged components.
  • Odd-Shaped Production: Machining square, rectangular, or raw, un-machined materials.
  • Eccentric Turning: Used for drilling off-center holes or creating cams.
GY 6200 Model Numbers
Chuck Size (MM) Chuck Size (Inches) Short Taper Through Hole (MM) C.I. Body S.G. Body
160 6 1/4″ D1-4 45 14341604 24341604
160 6 1/4″ D1-5 45 14341605 24341605
200 8″ A2-4 50 14342004 24342004
200 8″ D1-5 50 14342005 24342005
200 8″ D1-6 50 14342006 24342006
250 10″ D1-4 60 14342504 24342504
250 10″ D1-5 60 14342505 24342505
250 10″ D1-6 60 14342506 24342506
250 10″ D1-8 60 14342508 24342508
315 12 1/2″ D1-5 75 14343155 24343155
315 12 1/2″ D1-6 75 14343156 24343156
315 12 1/2″ D1-8 75 14343158 24343158
350 13 3/4″ D1-6 85 14343506 24343506
350 13 3/4″ D1-8 85 14343508 24343508
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Technical Specification
Size 160mm 200mm 250mm
Taper Nose D1-4 D1-5 D1-4 D1-5 D1-6 D1-4 D1-5 D1-6 D1-8
A 160 160 200 200 200 250 250 250 250
B 63.513 82.563 63.513 82.563 106.375 63.513 82.563 106.375 139.719
C 58 58 74 74 74 80 80 80 80
D 117 146 117 146 181 117 146 181 225
E 140 140 82.6 82.6 82.6 104.8 104.8 104.8 104.8
F 45 45 50 50 50 60 60 60 60
G M 10 M 10 M 10 M 10 M 10 M 10 M 10 M 10 M 10
H 13 15 13 15 16 13 15 16 18
J 24 24 32 32 32 32 32 32 32
K 32 32 39 39 39 42 42 42 42
M 9 9 10 10 10 11 11 11 11
N 5 6 5 6 12 5 6 12 12
P 20 20 22 23 23 22 23 23 25
R M10x1.0 M12x1.0 M10x1.0 M12x1.0 M16x1.5 M10x1.0 M12x1.0 M16x1.5 M20x1.5
S 15.9 19 15.9 19 22.2 15.9 19 22.2 25.4
Technical Specification
Size 315mm 350mm
Taper Nose D1-5 D1-6 D1-8 D1-6 D1-8
A 315 315 315 355 355
B 82.563 106.375 139.719 106.375 139.719
C 88 88 88 90 90
D 146 181 225 181 225
E 133.4 133.4 133.4 133.4 133.4
F 75 75 75 85 85
G M 12 M 12 M 12 M 12 M 12
H 15 16 18 16 18
J 36 36 36 36 36
K 48 48 48 52 52
M 12 12 12 12 12
N 6 12 12 12 12
P 23 25 25 25 25
R M12x1.0 M16x1.5 M20x1.5 M16x1.5 M20x1.5
S 19 22.2 25.4 22.2 25.4