The difference between Milling Cutter Head and Lock Head

2025-10-10

1. Definition and Purpose

Item	Milling Cutter Head	Lock Head
Meaning	The cutting head of a milling tool, used for metal cutting operations.	A locking or clamping head used to secure or fix tool parts or mechanical components.
Main Function	Performs metal cutting (milling) by holding replaceable inserts or blades.	Locks, fixes, or secures the tool holder, tool shank, or mechanical assembly.
Typical Application	CNC machining centers, milling machines.	Tool clamping systems, quick-change tool holders, mechanical fixtures.

2. Structural Difference

Item	Milling Cutter Head	Lock Head
Structure	Consists of a cutter body, insert pockets, and clamping screws.	Consists of locking mechanism parts such as threads, pins, or clamping sleeves.
Cutting Function	✅ Yes – directly performs the cutting.	❌ No – only used for locking or fixing.
Connection	Mounted on a tool holder or shank (e.g., BT, CAT, HSK).	Connected to a tool system or fixture to hold or release tools.

3. Examples

Milling Cutter Head examples:

→ These heads hold inserts and perform actual metal cutting.

Lock Head examples:

→ These heads are used for clamping or securing tools.

4. Summary

Comparison	Milling Cutter Head	Lock Head
Function	Metal cutting	Clamping or locking
Role in machining	Cutting component	Holding/fixing component
Contains inserts	Usually yes	Usually no
Direct machining involvement	Yes	No

✅ In short:

Milling Cutter Head → The cutting part of the milling tool.
Lock Head → The locking or clamping part used to fix or release the tool.

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