High-Precision ER Collet Chucks hold cylindrical-shank cutting tools for CNC milling, drilling, and precision component machining. The assembly uses an ER collet and clamping nut to secure the tool within a compatible spindle-mounted holder. Selection depends on spindle interface, ER series, tool diameter, gauge length, and required runout. Standard configurations and custom dimensions can be reviewed against technical drawings and application requirements.
Key Product Advantages
Accurate Tool Location
Precision-controlled taper and mating surfaces support concentric tool positioning. Total runout depends on the holder, collet, nut, tool shank, and assembly condition.
Multiple Clamping Sizes
ER16 to ER40 series cover a range of cylindrical tool diameters. Matching the collet bore to the specified shank diameter supports secure clamping and repeatable setup.
Application-Based Configuration
Holder interface, gauge length, and selected dimensions can be specified according to spindle requirements, tool reach, and workpiece clearance.
Repeatable Setup
Consistent component dimensions and defined assembly procedures support repeatable tool changes during recurring machining operations.
Technical Specifications
|
Parameter |
Specification |
|
Product Type |
High-Precision ER Collet Chuck |
|
Available ER Series |
ER16, ER20, ER25, ER32, ER40 |
|
Clamping Range |
ER16 (1–10mm) / ER20 (1–13mm) / ER25 (1–16mm) / ER32 (2–20mm) / ER40 (3–26mm) |
|
Spindle Interface |
BT30/40/50, ISO, SK, HSK-A63/A32 |
|
Gauge Length |
50 mm – 160 mm (Standard) |
|
Runout Tolerance |
≤ 0.005 mm (Standard) / ≤ 0.002 mm (Optional) |
|
Balancing Grade |
G2.5 @ 25,000 RPM |
|
Material & Hardness |
20CrMnTi / Bearing Steel, HRC 58–62 |
|
Cooling Type |
AD or AD/B type |
ER Series Selection
ER16
For smaller-diameter tools and compact machining setups. Confirm the tool shank diameter, required reach, and spindle interface.
ER20 and ER25
For general-purpose machining with compatible cylindrical-shank tools. Consider cutting load, tool overhang, and workpiece clearance.
ER32 and ER40
For larger tool diameters within the applicable series range. Check clamping capacity, spindle compatibility, and the required holder envelope.
Manufacturing and Dimensional Control
Taper Geometry
The spindle interface and ER taper require controlled geometry and surface finishing to meet specified dimensional tolerances.
Material Specification
Material grade and heat treatment should follow the approved drawing and product specification. Hardness requirements must correspond to the verified material and process.
Critical Dimensions
Inspection should cover specified interface dimensions, taper geometry, and other function-critical features using defined acceptance criteria.
Application Areas
CNC Milling
For compatible cylindrical-shank cutters used in profiling, slotting, contouring, and general material removal.
Drilling and Reaming
For compatible drills and reamers when the shank diameter, collet bore, and operating conditions match the selected assembly.
Mold and Precision Components
For machining operations requiring controlled tool positioning, suitable tool reach, and repeatable setups.
Production Machining
Standardized holder configurations support consistent tool setup across recurring machining operations.
Customization Services
Interface and Gauge Length
Custom configurations can be assessed against spindle interface drawings, required gauge length, and installation clearances.
Tolerance Requirements
Specified dimensions, runout limits, and balancing requirements can be reviewed for manufacturing feasibility.
Drawing-Based Development
Provide a technical drawing, dimensional schedule, or existing holder reference. The configuration, inspection criteria, and production requirements can then be reviewed before confirmation.
Quality Assurance
Drawing-Based Inspection
Critical dimensions should be measured against the approved drawing, with defined tolerances and acceptance criteria.
Runout Verification
Specify the measuring position, test mandrel or tool reference, and assembly conditions to make runout results meaningful and comparable.
Batch Control
Controlled drawing revisions and documented inspection procedures support dimensional consistency across production batches.
Selection Checklist
Spindle Interface
Confirm the required interface and matching holder model.
Tool Dimensions
Specify the ER series, nominal shank diameter, tool type, and required clamping length.
Accuracy and Speed
State the runout limit, measurement position, operating speed, and balancing requirement.
Supply Scope
Confirm whether the required assembly includes the holder body, ER collet, clamping nut, and accessories.
Frequently Asked Questions
Q: How do I select the correct ER collet chuck?
A: Provide the spindle interface, ER series, tool shank diameter, gauge length, and required runout.
Q: Can ER collets be used across different series?
A: The collet must match the holder's ER series and clamping system. Its bore must suit the specified tool shank diameter.
Q: How should runout be specified?
A: State the permissible value, measuring position, test reference, and assembly conditions.
Q: Can custom configurations be requested?
A: Yes. Dimensions and interfaces can be reviewed against drawings and specified machining requirements.
Q: Are the collet and nut included?
A: The supply scope depends on the selected configuration. Confirm the required components when requesting a quotation.
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