C Hook Spanner Wrench – Carbon Steel ER40 Collet Chuck Tool
C Hook Spanner Wrench – Carbon Steel ER40 Collet Chuck Tool
Homyl C Hook Spanner Wrench for ER40 Collet Chuck Nuts
Get a firm, precise grip on your ER40 clamping nuts with this heavy-duty C Hook Spanner Wrench by Homyl. Forged from high-grade carbon steel and fitted with an ergonomic anti-slip handle, this 230mm tool is engineered for CNC machinists, lathe operators, and workshop professionals who demand accuracy and durability from every tool in their kit.
Key Features
- ER40 Compatible: Designed specifically for ER40 collet chuck nuts with a 58mm (2.28 inch) opening width — a precise fit that protects your nuts, shafts, and housings from damage.
- Premium Carbon Steel Construction: Forged carbon steel delivers exceptional toughness, high hardness, and outstanding wear resistance for long-lasting workshop use.
- Ergonomic Anti-Slip Handle: The red rubber grip provides a comfortable, secure hold and ensures optimal torque transmission even in demanding conditions.
- Multifunctional Use: Drives key screws, threaded rings, and shafts — compatible with ER swivel clamping nuts, CNC milling machine chuck nuts, spring clamping nuts, and most standard tool holders.
- Accurate Fit: Reduces the risk of slippage or damage to surrounding components for clean, confident tightening and loosening every time.
Specifications
| Material | Carbon Steel |
| Overall Length | 230mm (~9.1 inches) |
| Opening Width | 58mm (2.28 inches) |
| Compatible With | ER40 Collet Chuck Nuts, CNC Milling Chuck Nuts, Spring Clamping Nut Tool Holders |
| Handle | Red Non-Slip Rubber Grip |
| Country of Origin | Made in China |
Package Contents
- 1 × C Hook Spanner Wrench (ER40)
Note: Please allow a measurement tolerance of 1–2mm due to manual measurement methods.
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Frequently Asked Questions
Q: Which collet chuck sizes is this C hook spanner compatible with?
A: This C hook spanner wrench is specifically designed for ER40 collet chuck nuts with a 58mm (2.28 inch) opening width. It is also compatible with ER swivel clamping nuts, CNC milling machine chuck nuts, spring clamping nuts, and most standard tool holders that match this opening size.
Q: What material is the C hook spanner made from?
A: The wrench is forged from high-quality carbon steel, offering excellent toughness, high hardness, and superior wear resistance — making it well-suited for regular professional workshop use.
Q: Is the handle comfortable for extended use?
A: Yes. The wrench features an ergonomic red rubber non-slip handle that provides a comfortable, secure grip and ensures optimal torque transmission, even during extended or heavy-duty tightening tasks.
Q: What is the overall length of this spanner wrench?
A: The C hook spanner measures 230mm (approximately 9.1 inches) in overall length, providing good leverage for tightening and loosening ER40 chuck nuts efficiently.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.