1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Kason 1248 Spring Assisted Flush Hinge. Designed for heavy walk-in doors, this hinge features a spring mechanism for added closing force, a special high-lift cam system to reduce gasket wear, and a built-in dwell function to hold the door open beyond approximately 135 degrees. It can be easily reversed for use on either right- or left-opening doors.
2. Product Overview
The Kason 1248 Spring Assisted Flush Hinge is engineered for durability and reliable performance in demanding environments. Key features include:
- Spring mechanism adds extra closing force to overcome air resistance on heavy walk-in doors.
- Special high-lift cam system outperforms similar spring hinges.
- Cam-rise action reduces gasket wear, even with irregular floors.
- Built-in dwell holds door open beyond approximately 135 degrees.
- Simple manual operation reverses hinges for use on right- or left-opening door.
Figure 1: Kason 1248 Spring Assisted Flush Hinge, top and side view.
Figure 2: Detailed view of Kason 1248 Hinge components, highlighting the nylon cam, high pressure die-cast zinc construction, spring housing, and key features.
3. Important Considerations: Flush vs. Offset
Before installation, it is crucial to correctly identify whether your door setup requires a flush or offset hinge. The 'offset' refers to the distance between the surface of the door and the surface of the door jamb (doorframe). Incorrect measurement can lead to improper fit, potential damage to the hinge or door, and delays.
Figure 3: Illustration distinguishing between Flush (door and jamb at same level) and Offset (distance between door and jamb surfaces).
To measure the offset:
- Option 1: Measure the distance directly between the jamb surface and the door's height using a measuring tape.
- Option 2: Use a sticky note or paper to mark the offset height on the door, then measure that distance.
Figure 4: Visual guide on two methods to accurately measure the hinge offset.
Video 1: This video demonstrates how to measure the offset for Kason 1245 hinges. The principles for measuring offset are applicable to the Kason 1248 hinge.
4. Setup and Installation: Reversing Hinge Handedness
The Kason 1248 hinge can be easily configured for either right- or left-opening doors. Follow these steps to reverse the hinge strap configuration:
- Remove the strap from the flange.
- Remove the pin.
- Push the cover cap out using a screwdriver.
- Reinsert the pin in the flange.
- Flip and replace the strap.
- Replace the cap cover.
Figure 5: Step-by-step guide on reversing the hinge strap configuration for Kason 1248 hinges.
Video 2: This video demonstrates how to swap the blade (reverse handedness) for Kason 1245 hinges. The procedure is similar for the Kason 1248 hinge.
5. Operating Instructions
The Kason 1248 hinge is designed to provide consistent closing force and a built-in dwell feature. The spring mechanism ensures the door closes securely, while the dwell feature holds the door open when extended beyond approximately 135 degrees, which can be useful for loading or unloading.
Torque Adjustment
The closing force (torque) of the hinge may be adjustable to suit specific door weights and closing requirements. Refer to the product specifications or consult a professional if adjustment is needed.
Video 3: This video demonstrates torque adjustment for Kason 1096L/M Walk-in Door Closers. While a different product, the concept of torque adjustment for spring-assisted mechanisms is similar and may provide general guidance.
6. Maintenance
To ensure the longevity and optimal performance of your Kason 1248 hinge, regular maintenance is recommended:
- Cleaning: Periodically clean the hinge surface with a soft cloth and mild detergent. Avoid abrasive cleaners that could damage the chrome finish.
- Inspection: Regularly check for any signs of wear, loose screws, or misalignment. Address any issues promptly to prevent further damage.
- Lubrication: While the hinge features nylon cam components designed for smooth operation, occasional lubrication of moving parts with a silicone-based lubricant can further enhance performance and reduce friction.
7. Troubleshooting
If you encounter issues with your Kason 1248 hinge, consider the following:
- Door not closing properly: Check if the hinge is correctly aligned. If the closing force seems insufficient, the spring mechanism might need inspection or adjustment (if applicable).
- Excessive noise or stiffness: Ensure the hinge is clean and free of debris. Apply lubricant to moving parts.
- Gasket wear: While the cam-rise action is designed to reduce gasket wear, persistent issues might indicate misalignment or an incorrect offset. Re-verify the offset measurement and hinge installation.
- Hinge appears damaged: Do not attempt to repair severely damaged hinges. Replace them with genuine Kason parts.
8. Specifications
Detailed specifications for the Kason 1248 Spring Assisted Flush Hinge:
| Attribute | Value |
|---|---|
| Material | Zinc, Vinyl |
| Brand | Kason |
| Product Dimensions | 10.24"L x 5.51"W |
| Finish Type | Chrome |
| Mounting Type | Surface Mount |
| Hole Count | 2 |
| Unit Count | 1.0 Count |
| Color | Silver |
| Manufacturer | Kason |
| UPC | 796762684779 |
| Item Weight | 3.3 pounds |
| Item Model Number | 1248-C000 |
| Size | Offset: Flush |
Figure 6: Technical drawing showing detailed dimensions of the Kason 1248 Spring Assisted Hinge.
9. Warranty Information
For specific warranty details regarding your Kason 1248 Spring Assisted Flush Hinge, please refer to the warranty documentation included with your purchase or visit the official Kason website. Kason stands behind the quality and durability of its products.
10. Support
If you require further assistance with installation, operation, maintenance, or troubleshooting, please contact Kason customer support. You can find contact information on the official Kason website or through your product supplier.
