Product Overview
The Chubbsafes Sigma Deposit 3 K is a robust security safe designed for the secure deposit of cash and valuables without requiring the main door to be opened. It features an anti-fishing device to prevent removal of deposited items. This manual provides essential information for the proper setup, operation, and maintenance of your safe.

This image displays the Chubbsafes Sigma Deposit 3 K safe. The safe is dark grey with its door partially open, revealing an interior shelf. A narrow deposit slot is visible at the top of the safe, designed for secure cash and valuable deposits without opening the main door. The safe features a robust construction, highlighting its security features.
Setup
- Unboxing: Carefully remove the safe from its packaging. Inspect for any signs of damage. Retain packaging for future transport if needed.
- Placement: Choose a secure, level, and stable location for the safe. Ensure there is adequate space for the door to open fully.
- Anchoring: For maximum security, the safe must be securely anchored. Use the supplied anchoring kit to fix the safe to the floor or a rear wall. Follow the instructions provided with the anchoring kit for proper installation.
- Initial Access: Use the provided key to open the safe door. Ensure the key turns smoothly.
Operating Instructions
Using the Key Lock
- To Open: Insert the key fully into the keyhole. Turn the key clockwise (or counter-clockwise, depending on the lock mechanism) until the bolts retract. Pull the door open.
- To Close: Push the door firmly shut. Insert the key and turn it counter-clockwise (or clockwise) until the bolts extend and the door is securely locked. Remove the key.
Using the Deposit Slot
- Locate the deposit slot at the top of the safe.
- Insert cash, envelopes, or small valuables into the slot.
- The anti-fishing device will ensure that once an item is deposited, it cannot be retrieved from the outside without opening the main safe door.
Maintenance
- Cleaning: Clean the exterior of the safe with a soft, damp cloth. Avoid using abrasive cleaners or solvents, as these can damage the finish.
- Lock Care: Keep the keyhole free from dust and debris. Do not lubricate the lock mechanism unless specifically recommended by Chubb Safes. Avoid forcing the key if it feels stiff.
- Hinges: Periodically check the door hinges for smooth operation. If they become stiff, a small amount of light lubricant can be applied.
- Key Management: Store spare keys in a secure location away from the safe. Do not leave keys inside the safe.
Troubleshooting
- Door Will Not Open: Ensure the key is fully inserted and turned correctly. Check for any obstructions preventing the door from opening.
- Key Is Stiff: Do not force the key. Ensure the key is clean and free of debris. If the issue persists, contact customer support.
- Deposited Items Not Falling Through: Check the deposit slot for any obstructions. Ensure items are not too large for the slot.
- Safe Feels Unstable: Re-check the anchoring bolts to ensure they are securely fastened according to the setup instructions.
Specifications
Feature | Detail |
---|---|
External Dimensions (H x W x D) | 475mm x 375mm x 350mm |
Internal Dimensions (H x W x D) | 469mm x 369mm x 289mm |
Volume | 50 Liters |
Lock Type | Double bitted 8 lever key lock |
Material | Alloy Steel |
Mounting Type | Freestanding (with anchoring kit) |
Included Components | Bolts, Keys |
Item Weight | 31 Kilograms (68.2 pounds) |
Water Resistance Level | Not Water Resistant |
Model Number | SIGMA-DEP-3K |
Warranty and Support
Chubb Safes products are manufactured to high standards and come with a manufacturer's warranty. For specific warranty details, please refer to the documentation included with your purchase or visit the official Chubb Safes website. For technical support, spare parts, or any inquiries not covered in this manual, please contact Chubb Safes customer service through their official channels.