GY 5100 Self Centering Chucks

Double Guide Master Top Jaws

Engineered for consistent quality and a longer operational life, the GY 5100 Self-Centering Lathe Chuck features a robust Double Guide Master Top Jaw design. Built to handle demanding machining tasks, these chucks offer exceptional versatility and precision.

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 5100 Model Numbers
Chuck Size (MM) Chuck Size (Inches) Through Hole C.I. Body S.G. Body Steel Body
3 Jaw 4 Jaw 3 Jaw 4 Jaw 3 Jaw 4 Jaw
125 5″ 32 1313125 1314125 2313125 2314125 3313125 3314125
160 6 ¼” 42 1313160 1314160 2313160 2314160 3313160 3314160
200 8″ 55 1313200 1314200 2313200 2314200 3313200 3314200
250 10″ 76 1313250 1314250 2313250 2314250 3313250 3314250
315 12 ½” 105 1313315 1314315 2313315 2314315 3313315 3314315
400 15 ¾” 136 1313400 1314400 2313400 2314400 3313400 3314400
Technical Specification
Size 125mm 160mm 200mm 250mm 315mm 400mm
A 125 160 200 250 315 400
B H7 95 125 160 200 260 330
C 32 42 55 76 105 136
D 66 75 83 96 110 120
E 107 119 129 150 169 190
G 60 71 85 100 115 136
H 5 5 6 6 7 7
J M 8 M 10 M 10 M 12 M 16 M 16
P.C.D K 108 140 176 224 286 362
Tol. on K ±0.25 ±0.30 ±0.30 ±0.35 ±0.40 ±0.40
L 16 19.05 22.25 27 31.75 38.10
M M8 M10 M10 M12 M12 M16
Size of Sq. Key 9 11 11 14 14 17