Kroshine R8 Keyless Drill Chuck 1/8"-5/8" (3-16mm), One-Piece R8 Shank — Open-Box, 18% Off

Designed with an integrated one-piece R8 shank and 1/8"-5/8" (3-16mm) clamping capacity, this keyless drill chuck delivers up to 0.002" accuracy for precision drilling, reaming and light milling operations. The rigid one-piece construction helps reduce runout and improves machining consistency. Premium titanium alloy jaws provide exceptional gripping force and wear resistance to reduce bit slippage under load. Designed for stable tool holding during precision machining, metal fabrication and continuous workshop use. The self-tightening mechanism automatically increases gripping force as machining torque rises, allowing fast tool changes while maintaining secure bit retention. Ideal for professionals requiring efficient setup and dependable machining accuracy. Unlike assembled shank adapters, the integrated R8 shank improves rigidity, minimizes vibration and helps maintain concentricity during machining. The included APU16 adjustment wrench allows secure installation and accurate alignment before operation. Package includes 1 x R8 Keyless Chuck (1/8"-5/8") and 1 x APU16 Adjustment Wrench. Compatible with most standard R8 spindles. Perfect for machine shops, tool rooms, and equipment maintenance. Kroshine R8 Shank Keyless Drill Chuck (1/8"-5/8") 3–16mm, Heavy‑Duty Lathe/ Mill Chuck with APU16 Spanner, Titanium Jaws

Specifications:

• Clamping Range: 1/8"–5/8" (3–16mm)
• Accuracy: ≤0.002" (0.05mm) concentricity
• Shank Type: Integrated one-piece R8 shank
• Jaw Material: Premium titanium alloy (wear-resistant, high grip)
• Included: 1 x R8 Keyless Chuck + 1 x APU16 Adjustment Wrench
• Compatible With: Most standard R8 vertical milling machines, CNC mills

What It Solves:

• Slippage during heavy torque? Titanium jaws auto-tighten as pressure increases.
• Vibration & runout from split shanks? One-piece R8 shank ensures rigid force transmission.
• Time wasted tightening bits? Keyless design + self-tightening = fast tool changes.

The precision design of the titanium claw head can provide excellent clamping force. The clamping force is strong, which can effectively stop the bit from loosening during the working process and ensure the stability and accuracy of the drilling.
Helps improve hole accuracy and tool life by reducing runout during machining.

Perfect for: Precision Drilling | Machine Shops | Tool Rooms | Metal Fabrication | Equipment Maintenance | Workshop Repair

Note: Always use the included APU16 wrench for secure installation and alignment before operation.