Straight Shank ER Tool Holder / Extension Bar for CNC Milling
1. Product Introduction
These straight shank ER tool holders (extension bars) are precision CNC components designed to connect your machine spindle and cutting tools. They are widely used in CNC milling machines and machining centers for extending tool reach or holding small-shank end mills, drills, and reamers.
If you are facing tool runout, poor surface finish, or insufficient reach in deep cavity machining, these high-rigidity holders are made to solve those problems.
2. Technical Specifications
| Parameter | Details |
|---|---|
| Type | Straight shank ER collet holder / extension bar |
| Material | 20CrMoTi alloy steel, hardened HRC 52–56 |
| Shank diameter | C10 / C12 / C16 / C20 |
| Collet type | ER8 / ER11 / ER16 |
| Length | 100mm / 150mm / 200mm |
| Tolerance | Runout ≤ 0.01mm |
| Surface finish | Black oxide coating, anti-rust |
| Application | CNC milling, drilling, engraving, deep cavity machining |
3. Available Models (Matching Your Table)
|
Model |
Shank dia.(mm) |
Length(mm) |
Collet type |
Nut type |
|
C10-ER8A-100L |
10 |
100 |
ER8 |
A |
|
C10-ER8M-100L |
10 |
100 |
ER8 |
M |
|
C10-ER8A-150L |
10 |
150 |
ER8 |
A |
|
C10-ER8M-150L |
10 |
150 |
ER8 |
M |
|
C12-ER8A-100L |
12 |
100 |
ER8 |
A |
|
C12-ER8M-150L |
12 |
150 |
ER8 |
M |
|
C12-ER11A-100L |
12 |
100 |
ER11 |
A |
|
C12-ER11A-150L |
12 |
150 |
ER11 |
A |
|
C12-ER11M-100L |
12 |
100 |
ER11 |
M |
|
C12-ER11M-150L |
12 |
150 |
ER11 |
M |
|
C16-ER16A-100L |
16 |
100 |
ER16 |
A |
|
C16-ER16A-150L |
16 |
150 |
ER16 |
A |
|
C16-ER16A-200L |
16 |
200 |
ER16 |
A |
|
C16-ER16M-100L |
16 |
100 |
ER16 |
M |
|
C16-ER16M-150L |
16 |
150 |
ER16 |
M |
|
C16-ER16M-200L |
16 |
200 |
ER16 |
M |
|
C20-ER16A-100L |
20 |
100 |
ER16 |
A |
|
C20-ER16A-150L |
20 |
150 |
ER16 |
A |
|
C20-ER16A-200L |
20 |
200 |
ER16 |
A |
|
C20-ER16M-100L |
20 |
100 |
ER16 |
M |
|
C20-ER16M-150L |
20 |
150 |
ER16 |
M |
|
C20-ER16M-200L |
20 |
200 |
ER16 |
M |
4. Key Features
High rigidity & stability:
Hardened alloy steel body reduces vibration during high-speed milling, improving surface finish and tool life.
Precision clamping:
ER collet system provides uniform clamping force, ensuring ≤0.01mm runout for accurate machining.
Extended reach:
Ideal for deep cavities, long workpieces, or when standard holders are too short.
Wide compatibility:
Fits most CNC milling machines, engraving machines, and standard ER collets.
Anti-rust & durable: Black oxide coating prevents corrosion; precision-ground surface ensures repeated use.
5. Application Scenarios
- CNC milling and engraving for mold parts
- Deep cavity machining requiring extended tool reach
- Holding small-diameter end mills, drills, and reamers
- High-speed machining of aluminum, steel, and plastic parts
6. Company strengths
Advantages of One-Stop Customization Services
OEM / ODM
We offer custom straight shank holders:
- Custom shank diameter, length, and collet type
- Special coatings (TiN/TiCN) for high-speed or hard material machining
- Small batches and bulk orders available
Quality Control
- All holders are 100% inspected for runout, dimensions, and hardness
- Precision-ground and heat-treated for consistent performance
- Material traceability and inspection reports available
🌐 Main Brand Site: big-brother-tool.com
📌 Product Display Site: www.dxdtools.com
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