DCMT Insert Holder
A DCMT Insert Holder is a versatile turning tool holder specifically designed to securely clamp DCMT style indexable cutting inserts. The ISO designation “DCMT” indicates a rhombic-shaped insert with a 55-degree nose angle, a positive rake angle, a clearance angle, and a central mounting hole. The positive rake angle makes these inserts well-suited for light to medium machining operations, including finishing and semi-finishing of various materials, particularly softer or more ductile ones like aluminum, stainless steel, and low-carbon steel. The 55-degree angle offers excellent clearance, making them ideal for profiling and machining complex geometries with reduced risk of interference.
The primary function of a DCMT Insert Holder is to provide a stable and accurately positioned platform for the DCMT insert. This ensures precise material removal and excellent surface finishes, especially in intricate machining tasks and tight spaces. The holder features a precision-machined pocket that matches the specific shape and dimensions of the DCMT insert, allowing for secure and repeatable clamping, typically achieved with a screw or lever mechanism. This robust clamping prevents insert movement and vibration during machining, which is crucial for achieving high-quality results, especially in finishing passes and when creating detailed contours.
DCMT inserts are favored for their ability to produce fine finishes and their excellent accessibility due to the 55-degree angle. They offer two cutting edges per side, totaling four usable edges per insert, providing good tool life and cost-effectiveness. The corresponding DCMT Insert Holders are designed for ease of use, enabling quick and straightforward insert changes, minimizing machine downtime. Available in various shank sizes and configurations to suit different machine tool types and application needs, DCMT Insert Tool Holders are a valuable asset in precision machining environments where good surface finish, lower cutting forces, and excellent clearance are required.
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“DCMT” is an ISO designation for a rhombic-shaped cutting insert with a 55-degree nose angle and a positive rake angle.
It holds DCMT style indexable cutting inserts, which are rhombic with a 55-degree nose angle and a positive rake.
Light to medium machining operations, including finishing, semi-finishing, and profiling, especially where good clearance is needed.
Positive rake angle reduces cutting forces and heat, excellent clearance due to the 55-degree angle, good for intricate shapes and tight spaces, ability to produce fine surface finishes.
Consider the shank size needed for your machine, the type of turning operation, the material you are machining, and the required lead angle.
Ensure the insert is seated correctly in the pocket and securely clamped using the provided screw or lever, following manufacturer guidelines.
Common sizes include 1/2″, 5/8″, 3/4″, 1″, and metric equivalents, to fit various machine tool holders.
Generally not recommended for heavy roughing due to the positive rake angle and the less robust cutting edge compared to negative rake inserts.
Aluminum, stainless steel, low-carbon steel, and other softer or more ductile materials where a good surface finish and intricate shapes are desired, especially in applications requiring good clearance.
The 55-degree angle offers better clearance, allowing for machining closer to shoulders and in more confined spaces, making it ideal for profiling complex parts.
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