Residential vs. Commercial Schlage Locks: SC1 & SC4 Keyways Explained
When it comes to Schlage deadbolts, the SC1 and SC4 keyways are two of the most common options available. While both are widely used in residential and commercial settings, they have key differences in design, security, and application. In this blog, we’ll explore what sets these two keyways apart, their best use cases, and how to rekey them properly.
SC1 vs. SC4: Key Differences
| Feature | SC1 Keyway | SC4 Keyway |
|---|---|---|
| Pin Count | 5-pin | 6-pin |
| Common Use | Residential | Commercial & High-Security Residential |
| Security Level | Standard | Enhanced Security |
| Key Compatibility | More common, easier to duplicate | Requires a specific 6-pin blank |
| Rekeying Complexity | Easier to rekey | Slightly more complex due to extra pin |
Use Cases: When to Choose SC1 vs. SC4
SC1 Keyway: Best for Residential Applications
SC1 keyways are the standard for most Schlage residential locks. These locks feature a 5-pin design, making them easier to rekey and maintain. They are a solid choice for homeowners looking for reliable security without the need for advanced high-security features. The SC1 keyway is widely available, making key duplication and replacement easy at most hardware stores and locksmiths.
SC4 Keyway: Best for Commercial & High-Security Needs
SC4 keyways are typically found in commercial settings or high-security residential applications. With an extra pin chamber, these 6-pin locks provide increased security and are more difficult to pick compared to SC1. Many commercial buildings prefer SC4 due to its enhanced protection against lock manipulation. However, because SC4 keys are less common, key duplication may require a professional locksmith.
Rekeying SC1 and SC4 Deadbolts: The Differences
Rekeying a Schlage SC1 or SC4 deadbolt follows a similar process, but the SC4 requires an extra step due to its 6-pin configuration.
Tools Needed:
- Schlage rekeying kit (appropriate for 5-pin or 6-pin locks)
- Plug follower
- Pinning tweezers
- Key gauge
- New key pins
Step-by-Step Rekeying Process:
- Remove the Lock Cylinder
- Use a screwdriver to remove the deadbolt from the door.
- Take out the cylinder by removing the retaining clip.
- Use a Key to Rotate the Plug
- Insert the current key and turn it slightly to unlock the plug.
- Use a plug follower to push the plug out carefully while keeping the driver pins in place.
- Replace Old Pins with New Pins
- For an SC1 lock, use a 5-pin keying kit.
- For an SC4 lock, use a 6-pin keying kit and ensure the correct placement of all six pins.
- Reinsert the Plug
- Once the new pins match the new key, slowly push the plug back in using the plug follower.
- Reassemble and Test
- Secure the retaining clip, reinstall the cylinder, and test the new key to ensure smooth operation.
Conclusion
If you’re securing a standard residential property, SC1 keyways offer reliability and ease of use. However, for businesses or homeowners seeking extra security, SC4 keyways provide an extra level of protection. When rekeying, the primary difference is the additional pin in SC4 locks, requiring a 6-pin key blank and a slightly more detailed process. Whether you're a property manager, real estate investor, or homeowner, understanding these keyway differences ensures you choose the right Schlage deadbolt for your needs.
