Product Description
Super Chuck® Ball Bearing Chuck
Specifically engineered for heavy-duty, close tolerance production drilling
Adaptable to a wide range of production drilling equipment, jig borers, milling machines, lathes and radials
Utilizing a ball thrust bearing to reduce friction in the chuck closing mechanism, it permits the application of more gripping force on drill shanks to maximize drilling torque
Ball bearing construction maximizes gripping force and drilling accuracy
Jaws center-ground for absolute straightness and alignment
Through–hardened sleeve teeth plus hardened nose and keyholes provide outstanding wear resistance
T.I.R. .003" Maximum at half capacity
TECHNICAL SPECIFICATIONS
Brand Name Jacobs
Capacity English 3/8 - 1
Capacity Metric 10-24
Jaw & Nut Repl Kit HK507435
Jaw & Nut Repl Kit for Newer Models HK5030348
Key Used K5
Model Number 20N
Mount 5JT
Type Super Chuck Ball Bearing Drill Chuck
30239D
Specifically engineered for heavy-duty, close tolerance production drilling
Adaptable to a wide range of production drilling equipment, jig borers, milling machines, lathes and radials
Utilizing a ball thrust bearing to reduce friction in the chuck closing mechanism, it permits the application of more gripping force on drill shanks to maximize drilling torque
Ball bearing construction maximizes gripping force and drilling accuracy
Jaws center-ground for absolute straightness and alignment
Through–hardened sleeve teeth plus hardened nose and keyholes provide outstanding wear resistance
T.I.R. .003" Maximum at half capacity
TECHNICAL SPECIFICATIONS
Brand Name Jacobs
Capacity English 3/8 - 1
Capacity Metric 10-24
Jaw & Nut Repl Kit HK507435
Jaw & Nut Repl Kit for Newer Models HK5030348
Key Used K5
Model Number 20N
Mount 5JT
Type Super Chuck Ball Bearing Drill Chuck
30239D
