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Corbin Russwin CK4851-KEYED Grade 1 Entrance/Office Cylindrical Knobset with Global Knob and Conventional Cylinder
Commercial-Grade Bored Lockset for Entrance and Office Security
The Corbin Russwin CK4851-KEYED is a Grade 1 cylindrical knobset from the 4000 Series, engineered to deliver an outstanding combination of value and performance for quality residential and light commercial applications. Featuring a Global Knob design with a conventional cylinder, this entrance/office function lock accommodates door thicknesses from 1-3/8" to 2" and is non-handed for simplified installation. The standard latch is a 787F66 deadlocking latchbolt with a 2-3/4" backset, square corner front, and 2-1/4" x 1-1/8" universal faceplate, paired with an ANSI curved lip strike measuring 4-7/8" x 1-1/4" x 1-1/4" lip to center. Precision manufactured mechanisms are zinc dichromated for corrosion resistance, and the stainless steel latchbolt ensures long service life.
Professional Features & Benefits
- Door Thickness Compatibility: Accommodates door thicknesses from 1-3/8" to 2", making it suitable for a wide range of residential and light commercial door applications.
- Standard Latch Specifications: Includes a 787F66 deadlocking latchbolt with a 2-3/4" backset, square corner front, and 2-1/4" x 1-1/8" universal faceplate for versatile installation.
- Standard Strike Specifications: Ships with an ANSI curved lip strike measuring 4-7/8" x 1-1/4" x 1-1/4" lip to center for a complete, ready-to-install package.
- Adjustable Latchbolt: Accommodates both flat and beveled doors, providing installation flexibility across varied door configurations.
- Corrosion-Resistant Construction: Precision manufactured mechanisms are zinc dichromated for corrosion resistance, while the stainless steel latchbolt delivers long-term durability.
- Entrance/Office Function: Deadlocking latchbolt operated by knob from either side, except when the turn button locks the outside knob. Pushing the turn button locks the outside knob, requiring use of a key outside to unlock — ideal for controlled-access office and entrance applications.
- Non-Handed Design: Universal, non-handed configuration simplifies ordering and installation without the need to specify door handing.
- ANSI/BHMA Compliance: Meets ANSI/BHMA A156.2 standards, confirming Grade 1 performance for commercial applications.
- Manufacturer Warranty: Backed by a 1 Year manufacturer warranty for added confidence and protection.
Technical Specifications
- Subcategory: Cylindrical Locks
- Product Group: Mechanical Locks
- Series: 4000 Series
- Grade: Grade 1
- Keyed Function: Single Cylinder
- Standard Latch: 787F66 - Deadlocking 2-3/4" Backset, Square corner front, 2-1/4" x 1-1/8" universal
- Standard Strike: ANSI Curved Lip 4-7/8" x 1-1/4" x 1-1/4" lip to center
- Warranty: 1 Year
- ANSI/BHMA: A156.2
- Product Subgroup: Bored Locksets
- Product Type: Knobsets
- Keyed: Yes
- Fasteners: Wood and Machine Screws
- Commercial/Residential: Commercial
- Function Description: Deadlocking latchbolt by knob either side, except when turn button locks outside knob. Pushing turn button in locks outside knob, requiring use of key outside to unlock.
- Lock Type: Cylindrical
- Handle Type: Knob
- Lock Function: Entrance/Office
- Product Attribute: Cylindrical Locks
- Product Model: CK4851
- Product Function: Entrance/Office
- Door Hand Direction: Non-Handed
- Door Thickness Range: 1-3/8" to 2"
- Product Category: Mechanical Locks
- Backset (Distance): 2-3/4"
- Department: Door Hardware
Professional Applications
- Commercial Office Buildings and Private Offices
- Fine Homes and Upscale Residential Properties
- Apartment and Multi-Unit Residential Buildings
- Motel and Hospitality Facilities
- Retail Establishments and Storefronts
- Light Commercial and Mixed-Use Buildings
- Educational and Administrative Facilities
Why Choose Corbin Russwin Quality?
Corbin Russwin cylindrical lock products deliver professional-grade reliability through precision manufactured mechanisms that are zinc dichromated for corrosion resistance and paired with a stainless steel latchbolt for long service life. The CK4851-KEYED meets ANSI/BHMA A156.2 Grade 1 standards, confirming its suitability for demanding commercial entrance and office applications. Backed by a 1 Year manufacturer warranty, this 4000 Series knobset is engineered to provide dependable access control performance across a wide range of commercial and quality residential installations.
Manufacturer Resources
Corbin Russwin Condensed Catalog
Product Specs
- Subcategory:
- Cylindrical Locks
- Product Group:
- Mechanical Locks
- Series:
- 4000 Series
- Grade:
- Grade 1
- Keyed Function:
- Single Cylinder
- Standard Latch:
- 787F66 - Deadlocking 2-3/4" Backset, Square corner front, 2-1/4" x 1-1/8" universal
- Standard Strike:
- ANSI Curved Lip 4-7/8" x 1-1/4" x 1-1/4" lip to center
- Warranty:
- 1 Year
- ANSI/BHMA:
- A156.2
- Product Subgroup:
- Bored Locksets
- Product Type:
- Knobsets
- Keyed:
- Yes
- Fasteners:
- Wood and Machine Screws
- Commercial/Residential:
- Commercial
- Function Description:
- Deadlocking latchbolt by knob either side, except when turn button locks outside knob. Pushing turn button in locks outside knob, requiring use of key outside to unlock.
- Lock Type:
- Cylindrical
- Handle Type:
- Knob
- Lock Function:
- Entrance/Office
- Product Attribute:
- Cylindrical Locks
- Product Model:
- CK4851
- Product Function:
- Entrance/Office
- Door Hand Direction:
- Non-Handed
- Door Thickness Range:
- 1-3/8" to 2"
- Product Category:
- Mechanical Locks
- Backset (Distance):
- 2-3/4"
- Department:
- Door Hardware
Corbin Russwin CK4851 GWC 626 – Frequently Asked Questions
1) What applications is the Corbin Russwin CK4851 designed for?
The CK4851 is a Grade 2 entrance/office cylindrical lock for commercial and institutional use. It provides keyed entry from the outside and free egress from the inside. Suitable for offices, retail spaces, and light commercial applications.
2) Is this lock compatible with standard door preparations?
Yes, the CK4851 fits ANSI A115.1 standard door prep. Requires 2-1/8" cross bore and 1" edge bore. Compatible with doors 1-3/8" to 1-3/4" thick. Verify your door preparation matches these specifications before installation.
3) How do I determine the correct handing for this lock?
Most cylindrical locks are reversible in the field. Stand on the side where the hinges are visible. If hinges are on your right, it's right-handed; if on your left, it's left-handed. Consult the installation template for specific handing instructions.
4) What finishes are available for the Global knob design?
Corbin Russwin typically offers multiple finish options including satin chrome, polished brass, and dark bronze. Check product specifications for available finishes. Confirm finish availability and lead times when ordering.
5) What does Grade 2 certification mean for performance?
Grade 2 meets ANSI/BHMA A156.2 standards for commercial use. Tested for 400,000 cycles and can handle doors up to 4 feet wide weighing up to 180 pounds. Suitable for medium-duty commercial applications with moderate traffic.
6) Can this lock be keyed to match existing systems?
Yes, the conventional cylinder can be keyed to match most existing systems. Contact a locksmith or key control specialist to determine compatibility with your current keying system. Master keying and construction keying options are typically available.
7) What replacement parts are commonly needed?
Common replacement parts include cylinders, latch assemblies, and strike plates. Springs and internal mechanisms may need service over time. Keep model number CK4851 for ordering correct replacement components from authorized distributors.
8) What are the basic installation requirements?
Installation requires standard door prep tools and hardware mounting screws (typically included). Follow manufacturer template carefully. Ensure door frame is square and latch aligns properly with strike plate. Professional installation recommended for warranty compliance.
9) How do I maintain and adjust this cylindrical lock?
Regular cleaning with mild soap prevents buildup. Lubricate moving parts with graphite (not oil-based lubricants). Check latch alignment periodically. If handles become loose, tighten mounting screws. Avoid over-tightening which can bind mechanisms.
10) Are there related models in the CK series?
Corbin Russwin offers various CK series models with different functions including passage, privacy, and classroom functions. The CK4851 is specifically an entrance/office function. Browse our Corbin Russwin collection for compatible series options.
11) What door conditions affect lock performance?
Door sag, warping, or frame misalignment can cause binding or incomplete latching. Ensure proper door clearances and frame alignment. Extreme temperature changes or moisture exposure may affect operation. Address door and frame issues before lock installation.
12) What are the key measurements for proper fit?
Standard backset is typically 2-3/8" or 2-3/4" from door edge to center of knob. Cross bore diameter is 2-1/8" and latch bore is 1". Door thickness range is 1-3/8" to 1-3/4". Verify these dimensions match your door before ordering.
How fast can I get the Corbin Russwin CK4851 GWC 626 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Corbin Russwin CK4851 GWC 626 come with a warranty?
Absolutely. The Corbin Russwin CK4851 GWC 626 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Corbin Russwin CK4851 GWC 626?
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