Jacobs Super Chuck Keyed Ball Bearing Drill Chuck 18N, 1/8 – 3/4″ Range, JT4 Mount

JT4, 1/8 to 3/4″ Capacity, Tapered Mount Drill Chuck
Keyed, 3-1/64″ Sleeve Diam, 3-31/32″ Open Length
Catalog Number: 30233

Features:

• Specially engineered for heavy duty close tolerance production drilling.
• Ideal for use on jig borers, milling machines, lathes and radial drill presses.
• Ball bearing construction maximizes gripping force and drilling accuracy.
• Jaws are centerground for absolute straightness and alignment.
• All working components are hardened for maximum wear resistance
• Tapered mount drill chucks have an internal Jacobs Taper (JT) that is press-fit onto a corresponding JT arbor (shank) or spindle.
• Keyed chucks are engineered to either loosen or tighten the hold on a tool by using a key. Keyed chucks offer the advantage of applying additional torque on the bit when slippage is a concern during heavy-duty applications.
• Ball bearings are designed to reduce friction in the tightening mechanism and provide a better grip on the drill. They are used for heavy-duty machining and require a key for tightening or loosening.
• Ball Bearing Construction Maximizes Gripping Force and Drilling Accuracy.
• Jaws Center-Ground for Straightness and Alignment.
• One-Piece Sleeve Eliminates Crack Between Driving Teeth Often Found in Other Designs.
• Through-Hardened Sleeve Teeth Plus Hardened Nose and Keyholes Provide Outstanding Wear Resistance.
• Fluted Sleeve Standard.
• Each Chuck 100% Inspected for Performance and Precision.
• T.I.R. 0.003″ Maximum at Half Capacity.

Specifications:

UPC 095456302334 Set No Maximum Capacity 0.750 in Minimum Capacity 0.125 in Mount 4JT Sleeve Outer Diameter 3.01 in Model Number 18N Manufacturer Part # 30233
18N Maximum Drill Chuck Capacity (mm) 19.05 Maximum Drill Chuck Capacity (Inch) 3/4 Maximum Drill Chuck Capacity (Decimal Inch) 0.7500 Minimum Drill Chuck Capacity (mm) 3.18 Minimum Drill Chuck Capacity (Inch) 1/8 Minimum Drill Chuck Capacity (Decimal Inch) 0.1250 Mount Type Tapered Mount Mounting Size JT4 Key Style Keyed Bearing Type Ball Bearing Material Steel Closed Length (mm) 130.18 Closed Length (Inch) 5-1/8 Open Length (mm) 100.81 Open Length (Inch) 3-31/32 Sleeve Diameter (mm) 76.60 Sleeve Diameter (Inch) 3-1/64 Key Number K4 TIR (Decimal Inch) 0.0030

See all Jacobs Super Chuck Keyed Ball Bearing Drill Chucks