GY 6100 Independent 4 Jaw Chucks

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.
    • 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 6100 Model Numbers
Chuck Size (MM) Chuck Size (Inches) Through Hole (MM) C.I. Body S.G. Body Steel Body
85 3 ¼” 20 —- —- 3414085
100 4″ 25 —- —- 3414100
125 5″ 32 —- —- 3414125
160 6 ¼” 45 1414160 2414160 —-
200 8″ 50 1414200 2414200 —-
250 10″ 60 1414250 2414250 —-
315 12 ½” 75 1414315 2414315 —-
350 13 ¾” 85 1414350 2414350 —-
400 15 ¾” 100 1414400 2414400 —-
450 17 ¾” 100 1414450 2414450 —-
500 19 ¾” 110 1414500 2414500 —-
Technical Specification
Size 85mm 100mm 125mm 160mm 200mm 250mm
A 85 100 127 160 200 250
B 38 50 50 58 74 80
C 56 70 95 125 95 125
D 3 4 4 6 6 8
E 67 83 108 140 82.6 104.8
F 20 25 32 45 50 60
G 6.5 6.5 9 11 11 11
H 10.5 10.5 13.5 17 17 17
J 11 18 20 24 32 32
K 22 23 25 32 39 42
M 6 6 7 9 10 11
N 7 7 10 12 12 12
Technical Specification
Size 315mm 350mm 400mm 450mm 500mm
A 315 355 400 450 500
B 88 90 95 95 110
C 160 160 200 200 260
D 10 10 12 12 18
E 133.4 133.4 171.4 171.4 235
F 75 85 100 100 110
G 13 13 17 17 21
H 19 19 25.4 25.4 32
J 36 36 40 40 45
K 48 52 55 55 60
M 12 12 14 14 17
N 14 14 18 18 22