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The Ultimate Guide to Different Drill Bit Types: How to Choose the Right Tool for the Job

Dezhou Drillstar Cutting Tool Co., Ltd. officially resumed production amidst a festive and auspicious atmosphere.

Dezhou Drillstar Cutting Tool Co., Ltd. 2026 Year of the Horse Gala: A Resounding Success – Forging Precision, Riding the Wind of Progress

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Comma face grooving cutters

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Description

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Comma face grooving cutters (also known as comma grooving cutters or face comma cutters) are specialized tools in CNC machining for processing annular face grooves and special-shaped face grooves. They are named for their cutting edge cross-section resembling a “comma (,)” shape, and are primarily used to address working conditions that ordinary grooving cutters cannot handle, such as asymmetric face grooves and narrow-deep face grooves. Below is a detailed description from the perspectives of structure, parameters, and applications:

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1 Core Structure and Design Features

2 Core Functions and Application Scenarios

Core Structure and Design Features

Cutting edge morphology: The cutting edge consists of a straight segment (main cutting edge) and an arc segment (transitional cutting edge), forming an overall comma profile — the straight segment is responsible for groove bottom/groove wall cutting, while the arc segment adapts to groove mouth transitions or special-shaped groove profiles. The cutting edge is sharp with no corner blind spots, capable of machining narrow grooves with a minimum width of 0.5mm.

Cutter body structure: Adopts an integral cemented carbide (WC-Co) or brazed insert structure (the insert material is cemented carbide/PCD, and the cutter bar is alloy steel). The cutter bar is designed as a straight bar or a 90° bent bar to meet the clearance requirements during face machining. Some models are equipped with internal cooling holes (chip removal via high-pressure coolant).

Positioning accuracy: The insert and cutter bar use a high-precision positioning groove (positioning accuracy ±0.005mm), with radial runout ≤0.01mm after clamping, ensuring dimensional consistency of face grooves.

Core Functions and Application Scenarios

Typical Machining Objects:Annular grooves and seal grooves on the end face of hydraulic valve blocks;Positioning grooves and special-shaped mounting grooves on the end face of motor end covers;Oil grooves and labyrinth grooves on the end face of bearing blocks;Narrow-deep special-shaped grooves on the end face of aerospace components (e.g., end face grooves of engine casings).

Process Advantages:Solves the problem of “end face machining interference” with ordinary grooving cutters (the bent design allows close proximity to the workpiece end face);Asymmetric groove profiles are formed in one pass (no multiple passes required), increasing machining efficiency by over 30% compared to ordinary grooving cutters;No risk of cutting edge chipping, and the machined surface roughness can reach Ra0.4μm, meeting the precision requirements of precision end face grooves.

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Products

The Ultimate Guide to Different Drill Bit Types: How to Choose the Right Tool for the Job

Dezhou Drillstar Cutting Tool Co., Ltd. officially resumed production amidst a festive and auspicious atmosphere.

Dezhou Drillstar Cutting Tool Co., Ltd. 2026 Year of the Horse Gala: A Resounding Success – Forging Precision, Riding the Wind of Progress

Comma face grooving cutters

Description

marker

Core Structure and Design Features

Core Functions and Application Scenarios

Contact us

* Name

*Email

Phone / WhatsAPP / WeChat

* What I have to say.

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Hard Metal STB

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CK61100 CNC lathe machine

2M2150 Deep Hole Honing Machine

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Modular Indexable Reamers (High-Precision Boring & Reaming Tools)

Tungsten Carbide Composite Rod

Rotary Drilling Teeth

Carbide Drill Bits

Viscose Fiber Cutting Knife

T2150 Deep Hole Drilling and Boring Machine

Stellite Alloy Valve Probe for the Petrochemical Industry

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