The CNMG shim is a precision-ground support component designed for use with CNMG negative turning inserts in external turning and facing toolholders. Installed directly beneath the insert, the shim protects the insert pocket from wear and damage caused by cutting pressure, vibration, chip flow, and repeated insert indexing during machining operations.
Manufactured from hardened alloy steel with high wear resistance, the shim provides a stable and accurate seating surface to ensure correct insert positioning and clamping performance. This helps maintain machining accuracy, surface finish quality, and dimensional consistency while extending the lifespan of the toolholder body.
CNMG shims are specifically designed to suit standard 80° diamond-shaped CNMG inserts with negative geometry and are commonly used in CNC lathes and conventional turning applications. Precision grinding ensures tight tolerances and reliable insert alignment, reducing movement under heavy cutting loads.
Technical Information:
- Compatible with standard CNMG inserts
- Suitable for external turning and facing holders
- Material: Hardened alloy steel
- Precision-ground contact surfaces
- High resistance to wear, heat, and deformation
- Protects toolholder insert pocket from damage
- Improves insert seating stability and repeatability
- Designed for high-speed and heavy-duty machining applications
- Easy replacement for reduced maintenance costs
Ideal for machining:
- Steel
- Stainless steel
- Cast iron
- High-temperature alloys
- General engineering materials
The use of a quality CNMG shim not only improves toolholder longevity but also enhances machining reliability and cutting performance in demanding industrial applications.
Reviews
There are no reviews yet.