R8 ER32 Collet Chuck Holder | 7/16"-20 UNC, 42CrMo Alloy Steel, 0.0002" TIR, 2-20mm Clamp Range, Milling Tool Holder

Descripción

Kraciva R8 ER32 collet chuck holder is a heavy-duty industrial tool holder designed for milling machine maintenance and workpiece processing. Adopting high-density 42CrMo alloy steel raw material, the whole body is heat-treated and hardened to HRC 48-52, with fine surface grinding to reduce friction and enhance overall durability. This R8 ER32 tool holder features low runout performance, the collet end TIR is controlled within 0.0002 inch, which can weaken tool vibration during high-speed rotation and maintain stable machining accuracy. The ER32 clamping system offers a flexible clamping range of 2mm to 20mm, compatible with various specifications of ER32 spring collets to clamp different types of machining tools. Equipped with standard 7/16"-20 UNC drawbar thread and precision R8 taper shank, it can be quickly installed and fixed on R8 spindle milling machines. The max safe working speed reaches 8000 RPM, suitable for conventional metal cutting, wood milling, hole drilling and other workshop processing tasks. Comes with high-strength ER32 lock nut, follow the standard installation steps to complete collet replacement and tool fixing. It is recommended to clean the contact surface before installation to keep connection tightness and extend service life. This R8 ER32 holder is a practical replacement part for old or damaged milling machine tool holders.

Características

• Made of premium 42CrMo alloy steel with overall hardening treatment up to HRC 48-52, integrated precision grinding process, great wear resistance and structural stability for long time industrial machining use.
• Strictly controlled runout with TIR within 0.0002 inch, effectively reduce tool shaking during rotation, stabilize machining tolerance and improve surface finish for daily milling, cutting and drilling work.
• Standard ER32 clamping range from 2mm to 20mm (0.08"-0.787"), compatible with most ER32 collets, widely fit for various drill bits, end mills and cutting tools to meet diversified processing needs.
• Precision machined R8 taper shank and 7/16"-20 UNC drawbar thread, smooth clamping and tight connection, suitable for R8 spindle manual milling machines and conventional CNC milling equipment.
• Support max working speed up to 8000 RPM, matched with standard ER locking nut, standardized assembly structure, easy to install and replace, help improve workshop processing efficiency.

Especificaciones