Model
18N
Range
1/8 – 3/4″
Mount
JT4
Key
K4
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
