MSSNR/L External Turning Holder | 45° Lead Angle Tool

Rigid MSSNR/L OD Turning Holder for Heavy Duty Machining

Overview

The MSSNR/L series is a robust external turning tool holder designed to maximize productivity in heavy metal removal operations. Featuring a critical 45° lead angle, this tool holder directs cutting forces inward towards the chuck, providing exceptional stability. It is the ideal CNC lathe cutter for rough facing, large chamfering, and turning applications where vibration control is paramount.

Universal Insert Compatibility (SNMG/SNMA/SNMM)

Designed as a versatile SNMG insert tool holder, the MSSNR/L utilizes a standard negative square pocket. This allows machinists to use a wide range of inserts depending on the material:

• SNMG: For general purpose turning of steel and stainless steel.

• SNMA: Flat-top inserts optimized for machining cast iron.

• SNMM: Designed for extreme roughing and heavy chip loads.

  This compatibility makes it a flexible “workhorse” tool for any machine shop.

Maximum Rigidity with M-Type Clamping

For heavy roughing, insert stability is non-negotiable. The MSSNR/L employs an M-Type Double Clamping System. By using both a locking pin and a top clamp, the insert is pulled firmly against the shim and pocket walls. This dual-action mechanism prevents the insert from lifting during interrupted cuts or high-feed operations.

ISO Code Naming Rules 

Understanding the ISO code helps you select the exact tool for your needs. Here is the breakdown for MSSNR/L:

Q1: Why choose a 45° lead angle turning tool like the MSSNR?
A: The 45° lead angle allows for higher feed rates by thinning the chip. It also eases the tool into the cut, reducing shock on the insert tip. This makes it excellent for roughing forgings or castings with irregular surfaces.

Q2: Can I use this holder for finishing?
A: While primarily a roughing tool, it can perform finishing if used with the correct SNMG insert grade and radius. However, the 45° angle creates larger radial forces, so a 93° or 95° holder might be better for fine finishing thin-walled parts.

Q3: What is the benefit of the M-Type clamp over the S-Type (Screw)?
A: The M-Type double clamp offers significantly higher holding power. In heavy OD turning, a screw can loosen or break. The M-Type clamp ensures the insert stays rigid even under extreme cutting pressure.