Jacobs - JT4, 1/8 to 3/4" Capacity, Tapered Mount Drill Chuck - Keyed, 3-1/64" Sleeve Diam, 3-31/32" Open Length
Item #: 44686608
Brand: Jacobs
Model #: 0859089/0859089
Exact Tooling IR#: 04
Features and Benefits
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.
| Product Specifications | |
|---|---|
| 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 |
| 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 |
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