Corbin Russwin 3070-178-7 CT7G...
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$263.84
$162.85
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Corbin Russwin 3070-178-7 CT7G LFIC Rim Housing with 1-7/8" Standard Tailpiece, Green Construction Core, 7-Pin, Satin Stainless Steel

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Model: 3070-178-7 630 CT7G

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

$263.84
$162.85
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Corbin Russwin 3070-178-7 CT7G LFIC Rim Housing with 1-7/8" Standard Tailpiece, Green Construction Core, 7-Pin, Satin Stainless Steel

The Corbin Russwin 3070-178-7 CT7G is a Less Full Interchangeable Core (LFIC) Rim Housing designed as a precision replacement part for compatible Corbin Russwin cylinder systems. This housing ships with a 1-7/8" standard tailpiece and includes a Green Construction Core, providing a controlled keying solution during the construction phase before permanent cores are installed. The 7-pin configuration and Satin Stainless Steel finish make this a durable, professional-grade component suited for demanding commercial door hardware applications.

Key Features

  • Standard Tailpiece Dimension: Features a 1-7/8" tailpiece (standard length) ensuring proper engagement with compatible rim exit device and lock mechanisms.
  • Green Construction Core Included: Ships with a Green Construction Core for temporary keying access during construction, allowing transition to permanent interchangeable cores upon project completion.
  • 7-Pin Cylinder Configuration: 7-pin LFIC format delivers enhanced key combination capacity and added security over standard 6-pin cylinders for commercial installations.
  • Less Full Interchangeable Core (LFIC) Design: Engineered for LFIC compatibility, enabling rapid core changeout without removing the housing from the door, reducing labor and rekeying costs.
  • Satin Stainless Steel Finish: Corrosion-resistant satin stainless steel finish provides long-term aesthetic consistency and durability in high-traffic commercial environments.
  • Genuine Corbin Russwin Cylinder Part: Manufactured as an authentic Corbin Russwin cylinder component, ensuring proper fit and function within compatible Corbin Russwin lock systems.
  • Commercial-Grade Construction: Designed and rated for commercial applications where reliable access control and key system integrity are essential.

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: 3070-178-7 CT7G
  • Features: Corbin Russwin Cylinder Parts

Typical Applications

  • Commercial Office Buildings Undergoing Construction or Renovation
  • Educational Facilities During New Construction Phasing
  • Healthcare Institutions Requiring Temporary Construction Keying
  • Retail and Mixed-Use Developments with Phased Occupancy
  • Government and Municipal Buildings with Managed Key Control Systems
  • Industrial and Warehouse Facilities Using Interchangeable Core Lock Systems
  • Multi-Tenant Residential and Commercial Properties with Master Key Programs

Why Corbin Russwin 3070-178-7?

Corbin Russwin cylinder components are engineered to meet the exacting standards of professional commercial door hardware installations. The 3070-178-7 CT7G LFIC Rim Housing delivers authentic fit and function within Corbin Russwin lock systems, backed by the precision manufacturing that commercial integrators and facility managers rely on. For projects requiring a secure, manageable construction keying solution with a clear transition path to permanent cores, this component provides the professional-grade reliability the application demands.

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:
3070-178-7 CT7G
Features:
Corbin Russwin Cylinder Parts

Corbin Russwin 3070-178-7 630 CT7G – Frequently Asked Questions

1) Does the Corbin Russwin 3070-178-7 rim housing come with a permanent core?
No. The 3070-178-7 CT7G is a Less Full Interchangeable Core (LFIC) rim housing, meaning it ships without a permanent core. What it does include is a green construction core so the opening can be keyed and locked during construction. You order the permanent 7-pin LFIC core separately and swap it in at turnover.
2) What is the 1-7/8 inch tailpiece on the Corbin Russwin 3070 rim housing for?
That is the standard-length tailpiece that reaches through the door to engage the mechanism behind it, typically a rim exit device or rim lock. At 1-7/8 inches it is the standard dimension, so it suits normal door and device prep. If your device sits deeper or the door is thicker than standard, you need a longer tailpiece version instead.
3) Will a 7-pin Corbin Russwin core fit this housing, or do I need 6-pin?
The housing is built for the 7-pin Corbin Russwin LFIC format, so order 7-pin cores keyed to your system. A 6-pin core is a different cylinder format and will not key into it. The 7-pin format also gives you more usable key combinations for a master key program than 6-pin.
4) Is this a rim cylinder or a mortise cylinder?
Rim. The 3070-178-7 is a rim housing, so it mounts through the door and is retained by screws from the inside, with the tailpiece driving a rim device. If your opening actually needs a threaded mortise cylinder for a mortise lock or a deadlock, a rim housing will not work there. Adams Rite's 4036 mortise cylinder is a Grade 1 mortise option, and Detex's MC65 is a 1-1/8 inch six-pin mortise cylinder in Schlage C keyway.
5) Will this Corbin Russwin housing work in a Sargent or BEST keyway system?
It is built as a genuine Corbin Russwin component for Corbin Russwin lock systems, so the core it accepts is Corbin Russwin LFIC, not BEST or Sargent small format. If your facility is keyed on BEST, order a BEST core instead, such as the 1C 5-pin standard core or the 1CDF drill resistant patented 7-pin core in the 150 series.
6) If I do not need interchangeable cores on a rim exit device, what is a simpler cylinder to use instead of the Corbin Russwin 3070-178-7 CT7G?
For a fixed-keyed rim exit device, a conventional rim cylinder is the simpler route. The Schlage 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam supplied with 2 keys, and the Schlage 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam. Both are pinned as one piece, so rekeying means pulling the cylinder. The Corbin Russwin 3070-178-7 CT7G is instead an LFIC housing that accepts an interchangeable core, so the core can be swapped without removing the housing from the door, and it ships with a Green Construction Core for temporary keying during construction. Choose by whether the site has a core changeout program.
7) What is the Schlage equivalent of the Corbin Russwin 3070-178-7 CT7G rim housing for an interchangeable core rim application?
The closest Schlage counterparts are the interchangeable core rim cylinders in the 20-057 family. The Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam supplied with 2 keys, and the Schlage 20-057-C is a full size interchangeable core cylinder in C keyway with a 643E Aged Bronze finish. The difference that matters: the Corbin Russwin 3070-178-7 CT7G is a Less Full Interchangeable Core (LFIC) housing in a 7-pin format, supplied with a 1-7/8 inch standard tailpiece and a Green Construction Core, in 630 Satin Stainless Steel. LFIC and FSIC cores are not interchangeable with each other, so match the core format your key system already uses.
8) Can I use a mortise cylinder like the Detex MC65 or Adams Rite 4036 in place of the Corbin Russwin 3070-178-7 CT7G?
No. Those are mortise cylinders, which thread into a mortise lock body and drive it with a cam. The Detex MC65 is a 1-1/8 inch 6-pin mortise cylinder in Schlage C keyway, and the Adams Rite 4036 is a five-pin mortise cylinder rated Grade 1 for doors from 1/2 inch minimum thickness. The Corbin Russwin 3070-178-7 CT7G is a rim housing: it mounts through the door face and engages the device with a 1-7/8 inch standard tailpiece, not a threaded cam. Rim and mortise preps are not interchangeable, so confirm which prep the device has before ordering.
9) My opening has an Adams Rite MS1847 deadlock - can I use the Corbin Russwin 3070-178-7 CT7G on it?
Use the Adams Rite parts built for that lock instead. The Adams Rite 4024 is a cylinder pull with trim plate mounting for MS1847 deadlock systems and the 4025 is a five pin tumbler cylinder pull with through-screws for the MS1847; for a wood door, the 4026 five pin tumbler cylinder pull is made for the Adams Rite 5017 wood door deadlock/deadlatch. The Corbin Russwin 3070-178-7 CT7G is an LFIC rim housing intended for compatible Corbin Russwin rim exit device and lock mechanisms, so it is not the part for an MS1847 prep.
10) Can I change cores later without taking the cylinder out of the door?
Yes, that is the point of the LFIC design. Once the housing is installed, the interchangeable core pulls and drops in with a control key, so you go from the green construction core to your permanent keying without pulling the housing off the door. For a property manager rekeying after tenant turnover, that means no disassembly of the exit device trim.
11) What is the difference between this LFIC housing and a full size interchangeable core rim cylinder?
An LFIC housing like the 3070-178-7 takes a small-format removable core that sits inside the housing body. A full size interchangeable core cylinder uses the larger FSIC figure-eight core and the housing is sized for it, so the two are not interchangeable. If your building is standardized on FSIC, Schlage's 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam, and the 20-057-C is the FSIC core itself in C keyway.
12) Why does the construction core matter on a phased occupancy job?
The green construction core lets the trades work the building on a throwaway construction key while the permanent keying stays out of circulation. When a floor or wing turns over, you pull the construction core and drop in the permanent core, and every construction key is dead at that opening with no lock disassembly. That is the reason this housing shows up on schools, hospitals, and mixed-use developments occupied in stages.
13) What is the BEST-brand alternative if I am standardizing on 7-pin interchangeable cores rather than the Corbin Russwin 3070-178-7 CT7G?
On the BEST side, the 1CDF is a drill resistant patented interchangeable core in a 7-pin brass 150 Series format, and the 1CB is a Peaks interchangeable core cylinder in the 150 Series. Both are cores, so they go into a matching BEST-format housing. The Corbin Russwin 3070-178-7 CT7G is the housing side of that equation: a 7-pin LFIC rim housing with a 1-7/8 inch standard tailpiece supplied with a Green Construction Core. A BEST core and a Corbin Russwin LFIC housing are different core formats, so pick the brand your master key system is already built on.
14) Is a Medeco lazy motion rim cylinder a substitute for the Corbin Russwin 3070-178-7 CT7G?
They are not the same application. The Medeco 1012040 is a 6-pin lazy motion rim cylinder built for Kwikset single cylinder deadbolts, the 1065244 is a 5-pin lazy motion rim cylinder supplied with an Emtek tailpiece, and the 1075127 is a 5-pin lazy motion rim type single cylinder for handlesets and deadbolts. Those are retrofit cylinders for residential-style deadbolts and handlesets. The Corbin Russwin 3070-178-7 CT7G is a commercial LFIC rim housing with a 1-7/8 inch standard tailpiece intended for compatible Corbin Russwin rim exit device and lock mechanisms.
15) What should I order instead of the Corbin Russwin 3070-178-7 CT7G if the opening only needs a non-keyed rim cylinder for appearance?
For a blank opening that needs the look of a cylinder without keyed function, the BEST 12E Series dummy rim cylinder with a 1-5/32 inch diameter covers it. The Corbin Russwin 3070-178-7 CT7G is the opposite requirement: an operating 7-pin LFIC rim housing that accepts an interchangeable core and ships with a Green Construction Core for temporary keying during the construction phase.
16) For a key-in-lever or deadbolt replacement, is the Corbin Russwin 3070-178-7 CT7G the right part?
No. For key-in-knob and key-in-lever work, the Kaba Ilco 1539 is a key-in-knob/lever universal cylinder and the 1599 is a key-in-knob replacement cylinder, both listed for deadbolt function; the Kaba Ilco 1549 is a key-in-deadbolt cylinder and the 1579 is a knob and lever cylinder for Sargent. The Falcon A23161-05 G is a key in lever cylinder in the RU/T Series 6-pin G keyway, keyed different with 2 cut keys. The Corbin Russwin 3070-178-7 CT7G is a rim housing with a 1-7/8 inch standard tailpiece, so it serves rim-prepped devices rather than the cylinder pocket in a knob, lever, or deadbolt.
17) What finish does the Corbin Russwin 3070-178-7 CT7G come in?
One finish only: 630 satin stainless steel. It is the corrosion resistant choice for exterior and high traffic commercial openings, and it reads as a match alongside 630 exit device trim and 32D/satin stainless door hardware already on the building.
18) Is the 3070-178-7 CT7G suitable for residential use?
It is classed as a commercial part, and in practice it only earns its keep in a managed key system, new construction phasing, or multi-tenant buildings where cores get swapped. For a single house deadbolt or handleset, a retrofit residential cylinder makes more sense, such as the Medeco 1075127 5-pin lazy motion rim cylinder for handlesets and deadbolts.
19) I need a 5-pin core rather than a 7-pin setup - what is the alternative to the Corbin Russwin 3070-178-7 CT7G?
If the key system is pinned to 5, the BEST 1C Series standard 5-pin cylinder core is the core-level option on that side. The Corbin Russwin 3070-178-7 CT7G is built around a 7-pin LFIC format, which the description notes gives greater key combination capacity than a standard 6-pin cylinder. Since pinning depth has to match the existing keyway and master key chart, confirm the pin count your system is keyed to before substituting either way.
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Can I return it if it doesn’t work for me?
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Does the Corbin Russwin 3070-178-7 630 CT7G come with a warranty?
Absolutely. The Corbin Russwin 3070-178-7 630 CT7G 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 3070-178-7 630 CT7G?
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