GY 4100 Self Centering Chucks

Double Guide Standard Jaws

Upgrade your machining precision with Self-Centering Chucks, engineered for consistent quality and a longer service life. Engineered with a double guide system, this chuck provides superior stability and gripping accuracy for a wide range of turning applications.

Key Features

Construction & Material Specifications
Our self-centering lathe 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.
    • Precision Scroll: Drop-forged from high-tensile alloy steel, precision machined, and hardened to 35 HRC for consistent centering accuracy.
    • 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 (3, 4, or 6 pieces).
    • Precision Jaw Systems: Available in both 3-jaw and 4-jaw configurations to provide superior grip and centering accuracy.
    • Extensive Size Range: We offer a comprehensive selection of sizes, from compact 80mm (3.1/4″) units up to heavy-duty 400mm (15.3/4″) chucks.

Accessories Included

Every Chuck comes ready for immediate setup with a comprehensive set of standard accessories:
  • 1 Set of Outside Hard Solid Jaws
  • 1 Set of Inside Hard Solid Jaws
  • 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

Self Centring Lathe Chucks are geared scroll chucks for use on lathes, rotary tables, dividing heads, milling machines etc.
GY 4100 Model Numbers
Chuck Size (mm) Chuck Size (Inches) Through Hole (mm) C.I. Body (3 Jaw) C.I. Body (4 Jaw) S.G. Body (3 Jaw) S.G. Body (4 Jaw) Steel Body (3 Jaw) Steel Body (4 Jaw)
125 5″ 32 1213125 1214125 2213125 2214125 3213125 3214125
160 6 1/4″ 42 1213160 1214160 2213160 2214160 3213160 3214160
200 8″ 55 1213200 1214200 2213200 2214200 3213200 3214200
250 10″ 76 1213250 1214250 2213250 2214250 3213250 3214250
315 12 1/2″ 105 1213315 1214315 2213315 2214315 3213315 3214315
400 15 3/4″ 136 1213400 1214400 2213400 2214400 3213400 3214400
Technical Specification
Size (mm) 125mm 160mm 200mm 250mm 315mm 400mm
Size (Inch) 5″ 6.1/4″ 8″ 10″ 12.1/2″ 15.3/4″
A (mm) 125 160 200 250 315 400
B H7 (mm) 95 125 160 200 260 330
C (mm) 32 42 55 76 105 136
D (mm) 66 75 83 96 110 120
E (mm) 20 30 29 34 43 55
G (mm) 51 70 85 105 125 145
H (mm) 5 5 6 6 7 7
J (mm) M 8 M 10 M 10 M 12 M 16 M 16
PCD K (mm) 108 140 176 224 286 362
Tol. on K ±0.25 ±0.30 ±0.30 ±0.35 ±0.40 ±0.40
Size of Sq. Key (mm) 9 11 11 14 14 17