Custom Parallel Key with Hole
Custom parallel key with hole is a precision mechanical transmission component designed for secure torque transfer, shaft positioning, and flexible installation in industrial machinery. The custom parallel key with hole features a standard rectangular key profile with a machined hole, providing additional functions such as positioning, fixing, lifting, or convenient removal according to specific application requirements.
Manufactured from carbon steel, stainless steel, alloy steel, or other engineering materials, the custom parallel key with hole offers reliable mechanical strength, accurate dimensions, and customized solutions for different equipment designs. It is widely used in motors, gear systems, pumps, automation equipment, and industrial machinery where standard keys cannot fully meet application requirements.

Product Overview
The custom parallel key with hole is engineered for applications requiring a specially modified key structure. Compared with standard parallel keys, the additional hole allows designers to integrate extra functions, such as securing the key with a screw, assisting removal, or improving assembly convenience.
The custom parallel key with hole maintains the same basic function as a traditional parallel key by transmitting torque between a shaft and hub. The rectangular profile fits into the keyway and prevents relative rotation between connected components.
As a specialized industrial mechanical component, it is widely selected by OEM manufacturers, machine builders, and engineering companies requiring customized transmission solutions.
Product Specifications
| Item | Description |
|---|---|
| Product Name | Custom Parallel Key with Hole |
| Material | Carbon Steel / Stainless Steel / Alloy Steel |
| Key Type | Customized Parallel Key |
| Shape | Rectangular Key |
| Hole Type | Through Hole / Threaded Hole / Customized Hole |
| End Type | Square Ends / Customized |
| Width Range | 2mm–50mm |
| Height Range | 2mm–30mm |
| Length Range | Customized |
| Surface Finish | Plain / Black Oxide / Zinc Plated / Polished |
| Installation Type | Shaft and Hub Keyway Fit |
| Function | Torque Transmission and Special Fixing |
| Packaging | Bulk / Carton / OEM Packaging |
| Customization | Drawing-based production available |
Technical Parameters
| Parameter | Value |
|---|---|
| Tensile Strength | According to selected material grade |
| Shear Strength | High torque transmission capability |
| Hardness | Customized according to application |
| Density | Steel Approx. 7.85 g/cm³ |
| Wear Resistance | Good mechanical durability |
| Corrosion Resistance | Depends on material and surface treatment |
| Dimensional Accuracy | Controlled according to drawing requirements |
| Manufacturing Standard | Customized / DIN6885 compatible |
Materials and Manufacturing Process
The custom parallel key with hole is manufactured through precision machining processes to ensure accurate dimensions and reliable performance.
- Raw material selection: High-quality steel or stainless steel materials
- Cutting: Precision cutting according to required size
- Milling machining: Formation of rectangular key profile
- Drilling process: Accurate hole machining according to customer drawings
- Thread machining: Optional internal thread processing
- Grinding: Improves dimensional accuracy and surface quality
- Heat treatment: Applied when required to improve hardness and wear resistance
- Surface finishing: Black oxide, zinc plating, polishing, or customized treatment
- Inspection: Key dimensions, hole position, and tolerance verification
- Packaging: Protective industrial packaging for transportation
Each custom parallel key with hole is produced under strict quality control to ensure stable transmission performance.
Applications of the Product
The custom parallel key with hole is widely used across various industries:
- Electric motors: Customized shaft connection systems
- Gear equipment: Special torque transmission assemblies
- Pumps: Shaft and impeller connection applications
- Automation equipment: Precision motion systems
- Machine tools: Custom fixture and transmission structures
- Industrial machinery: Modified mechanical assemblies
- Agricultural equipment: Drive system components
- OEM equipment: Special design requirements
Its customizable structure makes it suitable for complex mechanical designs.
Why Choose This Product
- Fully customized according to drawings
- Reliable torque transmission performance
- Flexible hole design options
- Available in multiple materials
- Accurate machining and positioning
- Suitable for special mechanical structures
- Supports prototype and mass production
- Stable quality for industrial applications
- OEM customization capability
The custom parallel key with hole provides an effective solution for non-standard shaft and hub connection requirements.
Why Choose Flybear
Flybear is a professional manufacturer specializing in precision industrial fasteners and customized mechanical components.
- Advanced CNC machining capability
- Custom key manufacturing experience
- OEM/ODM production support
- Flexible manufacturing for small and large orders
- Strict quality inspection procedures
- Global export experience
- Engineering support for customized applications
Flybear provides reliable mechanical components for machinery manufacturers, distributors, and industrial customers worldwide.
Quality Inspection and Control
Quality control is maintained throughout the manufacturing process:
- Raw material chemical composition analysis
- Material certificate verification
- Key dimensions inspection
- Hole position and diameter measurement
- Hardness testing
- Surface finish inspection
- Tolerance verification
- Packaging quality inspection
All production processes follow ISO-based quality management systems to ensure consistent product reliability.
Selection Guide
When selecting a custom parallel key with hole, consider:
- Shaft diameter and keyway dimensions
- Required torque transmission capacity
- Hole type and position requirements
- Material selection
- Operating environment
- Assembly and maintenance requirements
Providing a technical drawing or detailed specifications helps achieve the best customized solution.
FAQ
1. What is a custom parallel key with hole used for?
It is used for torque transmission and special fixing requirements in mechanical assemblies.
2. Can the hole position be customized?
Yes, hole size, position, and quantity can be customized according to drawings.
3. What materials can be used for custom keys?
Common materials include carbon steel, stainless steel, and alloy steel.
4. Can threaded holes be added to the key?
Yes, threaded holes can be machined for easier installation or removal.
5. Can Flybear produce non-standard key sizes?
Yes, Flybear supports fully customized dimensions and production requirements.
We always adhere to the philosophy of quality first and customer first, providing customers with high-quality fastener products and one-stop fastener solutions.
Contact us for quotation, customization, and technical support via Contact Us.




