The shim and non-standard stud screw in the 12.9-grade CNC turning tool bar accessories are key functional components in precision machining. Their core functions and features are as follows.
I. Core Functions of the Shim
Precise Positioning and Support
Serving as a transition piece between the insert and the tool bar, it ensures precise insert installation and reduces cutting vibration.
The high-hardness material absorbs cutting forces transmitted by the insert, preventing tool bar wear.
Extended Tool Life: Distributes force on the insert, preventing stress concentration that can cause tool bar cracking. Surface hardening improves wear resistance and adapts to high-speed cutting conditions.
Compatibility and Adaptability: Different tool bar diameters (M5/M6/M8) are compatible with various tool bar diameters to meet non-standard customization needs.
Special designs (such as bevels or grooves) accommodate complex insert shapes.
II. Core Functions of the Non-Standard Stud Screw
High-Strength Fastening
12.9-grade tensile strength (≥1220 MPa) ensures that the insert and shim remain secure during high-speed cutting.
The double-start thread design enables differentiated locking: the fine-thread end prevents loosening, while the coarse-thread end allows for quick assembly and disassembly.
Customization
Thread length and pitch can be customized to meet the specific requirements of the machine tool or toolholder, solving installation problems where standard parts cannot be installed.
Special materials (such as stainless steel or titanium plating) are available to handle corrosive coolants or high-temperature environments.
Stability and Vibration Damping
Precision thread alignment reduces assembly clearance and mitigates micro-vibration during cutting.
Some designs include elastic washer grooves to further suppress resonance.
III. Collaborative Working Scenarios
Typical Applications: When turning stainless steel or titanium alloys, the shim supports the insert to withstand intermittent cutting forces, while the custom double-start screw maintains system rigidity through high preload to prevent chipping.
Selection Recommendations
Shims: Prefer models with anti-slip grooves or locating pin holes for enhanced stability.
Screws: Select the double-start ratio based on the toolholder thread depth to avoid locking or insufficient strength.
Through these designs, the two screws ensure the reliability of CNC tools in high-load machining, making them particularly suitable for precision manufacturing applications such as aerospace and mold manufacturing. Selection Recommendations
Shims: Prefer models with anti-slip grooves or locating pin holes for enhanced stability.
Screws: Select a double-start ratio based on the shank thread depth to avoid locking or insufficient strength.
Through these two designs, the reliability of CNC tools in high-load machining is ensured, making them particularly suitable for precision manufacturing applications such as aerospace and mold manufacturing.
