Corbin Russwin 334F12-8 LFIC M...
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Corbin Russwin 334F12-8 LFIC Mortise Cylinder Cam Plate Replacement Part

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Model: 334F12-8

In Stock (leaves warehouse same day if ordered before 3pm ET)

$11.01
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Corbin Russwin 334F12-8 LFIC Mortise Cylinder Cam Plate Replacement Part

The Corbin Russwin 334F12-8 is a genuine OEM replacement cam plate designed for use with Large Format Interchangeable Core (LFIC) mortise cylinder assemblies. This precision-engineered component ensures proper cam engagement and cylinder operation within compatible Corbin Russwin mortise cylinder configurations. Intended for commercial-grade door hardware applications, this replacement part helps restore and maintain the performance of existing Corbin Russwin cylinder installations.

Key Features

  • OEM Replacement Component: Genuine Corbin Russwin cylinder part engineered to factory specifications for reliable performance and drop-in compatibility.
  • LFIC Compatibility: Specifically designed for Large Format Interchangeable Core (LFIC) mortise cylinder assemblies, supporting seamless core interchangeability.
  • Mortise Cylinder Application: Functions as the cam plate within mortise cylinder configurations, ensuring correct cam-to-tailpiece engagement and smooth lock operation.
  • Commercial-Grade Construction: Built to meet the demands of commercial door hardware environments where dependable, long-term performance is required.
  • Precise Fitment: Engineered to exact Corbin Russwin tolerances, minimizing installation adjustments and reducing downtime during maintenance or repair.
  • Parts and Accessories Category: Classified as a replacement part, this component is ideal for facility maintenance teams, locksmiths, and security professionals servicing existing Corbin Russwin hardware.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Subgroup: Parts and Accessories
  • Product Type: Cylinders
  • Parts and Accessories Type: Replacement Parts
  • Commercial/Residential: Commercial
  • Product Model: 334F12-8
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Government and Municipal Buildings
  • Multi-Tenant Residential Properties
  • Industrial and Warehouse Facilities
  • Retail Establishments

Why Corbin Russwin 334F12-8?

Corbin Russwin cylinder parts are manufactured to exacting commercial-grade standards, ensuring genuine OEM compatibility and reliable performance within mortise cylinder assemblies. The 334F12-8 cam plate delivers the precision fitment that maintenance professionals and locksmiths depend on when servicing LFIC mortise cylinder installations, minimizing downtime and preserving the integrity of the overall locking system.

Manufacturer Resources

Product Specs

Department:
Door Hardware
Product Category:
Mechanical Locks
Product Group:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Subgroup:
Parts and Accessories
Product Type:
Cylinders
Parts and Accessories Type:
Replacement Parts
Commercial/Residential:
Commercial
Product Model:
334F12-8
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 334F12-8 – Frequently Asked Questions

1) What exactly is the Corbin Russwin 334F12-8 part?
It is a cam plate for Corbin Russwin mortise cylinders, not a complete cylinder and not a core. The cam plate is the piece that sets cam-to-tailpiece engagement inside the cylinder assembly so the lock turns properly. If you need a working keyed cylinder, you need the cylinder housing and core as well; the 334F12-8 is the service part only.
2) Will the 334F12-8 cam plate work with a large format interchangeable core cylinder?
Yes. The 334F12-8 is built for Corbin Russwin Large Format Interchangeable Core (LFIC) mortise cylinder assemblies, so it supports core swaps in a keying system without replacing the cylinder body. It is not offered for small format core applications.
3) Can I use a Corbin Russwin cam plate on a Schlage or BEST cylinder?
No. The 334F12-8 is cut to Corbin Russwin mortise cylinder geometry, so it will not serve a Schlage or BEST housing. If you are working on a Schlage opening, the rim cylinders are separate assemblies, such as the Schlage 20-021 with a vertical tailpiece cam or the 20-022 with a horizontal tailpiece cam. For BEST interchangeable core work, the 1C Series 5-pin core is the core-level part rather than a cam plate.
4) If the whole Corbin Russwin mortise cylinder is worn out, not just the cam plate, what complete mortise cylinder can be used instead of the 334F12-8?
The 334F12-8 is only the cam plate that sets cam-to-tailpiece engagement inside an LFIC mortise cylinder assembly, so it does nothing if the cylinder body itself is failing. For a complete mortise cylinder, the Adams Rite 4036 is a five-pin Grade 1 mortise cylinder in the 4036 Series, and the Detex MC65 is a 1-1/8 inch six-pin commercial mortise cylinder cut to the Schlage C keyway. Both are full cylinders rather than internal parts, so the existing keying and key system have to be reconciled before swapping.
5) Will the 334F12-8 cam plate work on a rim cylinder?
No. The 334F12-8 is a cam plate for mortise cylinder assemblies, and rim cylinders use a tailpiece arrangement instead. Rim applications are served by complete cylinders such as the Schlage 20-021 six-pin rim cylinder with a vertical tailpiece cam or the Schlage 20-022 with a horizontal tailpiece cam. Which of those two you need depends on the exit device or rim lock prep, not on the mortise cam plate.
6) What is the difference between the 334F12-8 cam plate and an interchangeable core?
The 334F12-8 is the cam plate inside a Large Format Interchangeable Core mortise cylinder assembly; it stays with the housing and is not keyed. The core is the keyed element that drops in and out, such as the BEST 1C Series standard 5-pin cylinder core, the BEST 1CB 150 Series interchangeable core, or the BEST 1CDF drill-resistant patented 7-pin brass core in the 150 Series. If a tenant change calls for rekeying, you change the core; if cam engagement is sloppy, you change the cam plate.
7) Is this cam plate an aftermarket part or genuine Corbin Russwin?
Genuine Corbin Russwin OEM. It is made to the factory's own tolerances for its mortise cylinders, which is what keeps cam engagement correct without filing or shimming during a service call.
8) My Corbin Russwin mortise lock key turns but the bolt does not move. Is the cam plate the fix?
That symptom points at cam engagement, which is exactly what this plate controls. The 334F12-8 sets the cam-to-tailpiece relationship in the cylinder, so a worn or wrong plate lets the key rotate without driving the lock. Pull the cylinder and confirm the cam is the failed piece before ordering, since the core itself or the lock body can produce the same complaint.
9) Our doors use full size interchangeable cores instead of LFIC housings. Is the 334F12-8 still the right part?
The 334F12-8 cam plate is specific to Large Format Interchangeable Core mortise cylinder assemblies from Corbin Russwin. Facilities standardized on Schlage full size interchangeable core hardware work from FSIC parts instead, such as the Schlage 20-057 six-pin FSIC rim cylinder with convertible tailpiece cam or the 20-057-C FSIC core in the C keyway with a 643E aged bronze finish. Confirm which core platform the existing housings accept before ordering either way.
10) The lock we are servicing is a key-in-lever, not a mortise lock. What replaces the cylinder there?
The 334F12-8 cam plate belongs to a mortise cylinder assembly and has no place in a key-in-lever chassis. Key-in-knob and key-in-lever replacements include the Kaba Ilco 1539 Series universal key-in-knob/lever cylinder, the Kaba Ilco 1579 for Sargent knobs and levers, the Kaba Ilco 1599 key-in-knob replacement cylinder, and the Falcon A23161-05 G key-in-lever cylinder in the RU/T six-pin G keyway, keyed different with two cut keys.
11) We need a keyed cylinder for a deadbolt, not a mortise cam plate. What are the options?
The Corbin Russwin 334F12-8 is an internal cam plate for mortise cylinder assemblies and is not keyed. For deadbolt cylinders, the Kaba Ilco 1549 Series is a key-in-deadbolt cylinder, the Medeco 1012040 is a six-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the Medeco 1075127 is a five-pin rim type lazy motion single cylinder for handlesets and deadbolts.
12) Is the 334F12-8 cam plate what I need for an aluminum storefront door with an Adams Rite deadlock?
No. The 334F12-8 is a Corbin Russwin cam plate for LFIC mortise cylinder assemblies. Adams Rite narrow stile deadlocks are served by their own cylinder pulls: the 4024 cylinder pull with trim plate mounting and the 4025 five-pin cylinder pull with through-screws are both for the MS1847 deadlock/deadlatch, and the 4026 five-pin cylinder pull is for the 5017 wood door deadlock/deadlatch.
13) Is the 334F12-8 rated for commercial door hardware or is it a residential part?
Commercial. It is a commercial-grade door hardware component, the kind of part maintenance teams and locksmiths stock for office buildings, schools, hospitals, government facilities, multi-tenant residential and warehouses running Corbin Russwin mortise hardware.
14) We only need a cylinder to fill the hole with no key function. Does the 334F12-8 do that?
No. The 334F12-8 is a functional cam plate inside a mortise cylinder assembly, not a filler. Where a non-keyed dummy is wanted, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter fills a rim prep without operating anything, and the Emtek CY4 cylinder is sold individually as a part. Neither is a mortise cylinder component.
15) For Emtek handlesets and deadbolts, is there a cylinder part comparable to the Corbin Russwin 334F12-8?
Not a direct one, because the 334F12-8 is an internal cam plate for Corbin Russwin LFIC mortise cylinders. Emtek hardware is served by complete cylinders instead: the Medeco 1065140 is a five-pin retrofit cylinder for Arrow JL interconnected locks and Emtek handleset and deadbolt outside cylinders, and the Medeco 1065244 is a five-pin rim lazy motion cylinder supplied with an Emtek tailpiece. The Emtek CY4 cylinder is also sold as a single part.
How fast can I get the Corbin Russwin 334F12-8 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. 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 334F12-8 come with a warranty?
Absolutely. The Corbin Russwin 334F12-8 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 334F12-8?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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