Jacobs Super Chuck Keyed Ball Bearing Drill Chuck 20N, 3/8 - 1" Range, JT5 Mount - 71-744-7Brand: Jacobs
|Range||3/8 - 1"|
Jacobs Super Chuck Keyed Ball Bearing Drill Chuck 20N, 3/8 - 1" Range, JT5 Mount
JT5, 3/8 to 1" Capacity, Tapered Mount Drill Chuck
Keyed, 3-21/32" Sleeve Diam, 4-1/4" Open Length
Catalog Number: 30239
- 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.
|Maximum Capacity||1.000 in|
|Minimum Capacity||0.375 in|
|Sleeve Outer Diameter||3.65 in|
|Manufacturer Part #||30239 |
|Maximum Drill Chuck Capacity (mm)||25.40|
|Maximum Drill Chuck Capacity (Inch)||1|
|Maximum Drill Chuck Capacity (Decimal Inch)||1.0000|
|Minimum Drill Chuck Capacity (mm)||9.53|
|Minimum Drill Chuck Capacity (Inch)||3/8|
|Minimum Drill Chuck Capacity (Decimal Inch)||0.3750|
|Mount Type||Tapered Mount|
|Bearing Type||Ball Bearing|
|Closed Length (mm)||139.70|
|Closed Length (Inch)||5-1/2|
|Open Length (mm)||107.95|
|Open Length (Inch)||4-1/4|
|Sleeve Diameter (mm)||92.87|
|Sleeve Diameter (Inch)||3-21/32|
|TIR (Decimal Inch)||0.0030|