BEST 1EE Series Slabbed Lost M...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$269.00
$244.92
BEST BEST 1EE Series Slabbed Lost Motion Mortise Cylinder 7-Pin with Standard Core, 1-5/32" Diameter BES-1EE-STANDARD

BEST 1EE Series Slabbed Lost Motion Mortise Cylinder 7-Pin with Standard Core

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Model: BES-1EE7E4-C4RP3626-SC
From the E Series Cylinders Collection
$269.00
$244.92
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$269.00
$244.92
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BEST 1EE Series Slabbed Lost Motion Mortise Cylinder 7-Pin with Standard Core

Professional Mortise Cylinder Component

The BEST 1EE Series mortise cylinder delivers reliable keying solutions for commercial and residential applications. This 7-pin cylinder features a 1-5/32" diameter with 1-1/4" effective length, constructed from solid brass or bronze for long-lasting durability. The slabbed lost motion design ensures smooth operation with standard core compatibility and includes C229 cam configuration with right-hand or left-hand options.

Professional Features & Benefits

  • Precision Dimensions: 1-5/32" diameter with 1-1/4" effective length for 7-pin configuration ensures proper fit in mortise lock applications.
  • Heavy-Duty Construction: Solid brass or bronze material provides exceptional durability and corrosion resistance for long-term performance.
  • Versatile Cam Options: Standard C229 cam supplied with right-hand or left-hand configuration options for flexible installation requirements.
  • Standard Ring Package: RP2 ring package included standard for 6 and 7-pin configurations with optional RP3 upgrade available.
  • Special Length Availability: Custom 2" and 2-1/4" cylinder lengths available for specialized applications requiring extended reach.
  • Lost Motion Design: Slabbed lost motion mechanism provides smooth operation and reduces wear on internal components.
  • Standard Core Compatibility: Works with standard keying systems for easy integration into existing access control configurations.

Technical Specifications

  • Collection: E Series Cylinders
  • Commercial/Residential: Residential
  • Department: Door Hardware
  • Parts and Accessories Type: Replacement Parts
  • Product Attribute: Parts and Accessories
  • Product Category: Mechanical Locks
  • Product Group: Parts and Accessories
  • Product Subgroup: Cylinders
  • Product Type: Cylinders
  • Series: 1EE Series
  • Subcategory: Parts and Accessories

Installation & Operation

This replacement cylinder component is designed for use with compatible BEST mortise lock systems. Refer to the parent device installation instructions and manufacturer documentation for proper integration. Ensure compatibility with existing hardware before installation.

Professional Applications

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

Why Choose BEST Quality?

BEST mortise cylinder components deliver professional-grade reliability with solid brass or bronze construction engineered for demanding commercial applications. The 1EE Series provides precise dimensional tolerances and smooth lost motion operation for dependable long-term performance. Backed by comprehensive technical documentation and service support for professional installation confidence.

Manufacturer Resources

E Series Service Manual

Product Specs

Series:
1EE Series
Subcategory:
Parts and Accessories
Product Group:
Parts and Accessories
Product Subgroup:
Cylinders
Product Type:
Cylinders
Commercial/Residential:
Residential
Collection:
E Series Cylinders
Parts and Accessories Type:
Replacement Parts
Product Attribute:
Parts and Accessories
Product Category:
Mechanical Locks
Department:
Door Hardware

BEST BES-1EE7E4-C4RP3626-SC – Frequently Asked Questions

1) Will a BEST 1EE mortise cylinder fit a lock prepped for a 1-1/4 inch cylinder?
Yes. The 1EE Series mortise cylinder measures 1-5/32 inches in diameter with a 1-1/4 inch effective length, which is the standard mortise cylinder threaded diameter and the common short length for a mortise lock case. If your opening needs the cylinder to reach further through thicker trim or a thicker door, 2 inch and 2-1/4 inch lengths are available as special lengths.
2) Why does a BEST 1EE mortise cylinder need a hand specified when ordering?
The slabbed lost motion design in the 1EE cylinder is handed, so right hand and left hand are separate parts and both are offered. Determine the hand of the lock the cylinder is going into before you order, because an RH cylinder in an LH lock will not drive the cam correctly. The standard C229 cam ships with the cylinder in either hand.
3) What do I have to specify to order a BEST 1EE mortise cylinder correctly?
Four things are required on a 1EE order: keyway, handing, keymark, and marking number. Keyway runs A, B, C, D, DD, E, F, G, H, J, K, L, M, N, O, R, TB, TC, TD, and TE. Handing is right or left. Keymark and marking number are how the cylinder gets cut into your existing BEST key system, so pull them off the keying schedule or an existing cylinder in the building before you order.
4) Can I use a BEST 1EE cylinder on an Adams Rite MS deadlock?
Yes, if you order it with the Adams Rite MS cam instead of the standard cam. That cam option is offered on the 1EE, which is what lets the cylinder drive an MS style deadlock rather than a conventional mortise lock case. A standard spindle option is also available for applications that take a spindle rather than a cam.
5) Is a BEST mortise cylinder the same thing as a rim cylinder, and how do I know which one my lock takes?
They are not interchangeable. The 1EE is a mortise cylinder: it threads into the lock case and turns a cam, and it is 1-5/32 inches in diameter with a 1-1/4 inch effective length. A rim cylinder mounts through the door and drives a tailpiece into a rim device on the inside face. If your hardware is a rim exit device or a surface deadlock, you want a rim cylinder such as the Schlage 20-021 with a vertical tailpiece cam or the 20-022 with a horizontal tailpiece cam, not a mortise cylinder.
6) What are the alternatives to a BEST 1EE mortise cylinder if my building is not on BEST keying?
The 1EE is built around BEST keyways and BEST keymarks, so it only makes sense where the facility is already on a BEST system. On other systems, Corbin Russwin's 1000 Series Grade 1 mortise cylinder comes in a 1-1/2 inch length with an A02 straight cam, and the 1070 Grade 1 housing is a 1-1/4 inch 6-pin with an A01 cloverleaf cam. The Adams Rite 4036 is a five-pin Grade 1 mortise cylinder rated to a 1/2 inch minimum door thickness. Detex offers the MC65, a 1-1/8 inch 6-pin mortise cylinder in Schlage C keyway.
7) I need a cylinder that takes an interchangeable core, not a standard cylinder. Is the 1EE the right part?
No. The 1EE is a standard core cylinder, a fixed pinned unit keyed to your system, not a housing that accepts a removable core. If you want core-swap rekeying, look at a full size interchangeable core setup such as the Schlage 20-057 6-pin FSIC rim cylinder with convertible tailpiece cam, or a Corbin Russwin 1080 LFIC mortise cylinder in 1-1/2 inch, 6-pin with an A01 cam, which is listed for Schlage L9000 mortise locks.
8) What is the closest cross-brand equivalent to a BEST 1EE mortise cylinder for a mortise lock body?
The BEST 1EE Series is a slabbed lost motion mortise cylinder in a 7-pin configuration with standard core compatibility. On the mortise-housing side, the Corbin Russwin 1070 Grade 1 Series is a 1-1/4 inch 6-pin mortise housing supplied with an A01 cloverleaf cam, and the Corbin Russwin 1000 Grade 1 Series mortise cylinder comes in a 1-1/2 inch length with an A02 straight cam. Both are mortise cylinders that thread into a mortise lock body the same way, but they are keyed to Corbin Russwin systems and use Corbin Russwin cams, so the cam and keyway have to match the lock and the master key system already in the building.
9) What should I use instead of a BEST 1EE mortise cylinder on an exit device that takes a rim cylinder?
A rim device needs a rim cylinder with a tailpiece, not a threaded mortise cylinder. The Schlage Commercial 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam supplied with 2 keys, and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam. The Corbin Russwin 3070 is a 6-pin rim cylinder housing with a 1-7/8 inch tailpiece. Pick the tailpiece orientation the device chassis calls for. The BEST 1EE does offer a rim cylinder ring option, so confirm which body style the order is being written for.
10) For an aluminum storefront door with an Adams Rite MS deadlock, does a BEST 1EE work or do I need an Adams Rite cylinder?
The BEST 1EE can be ordered with an Adams Rite MS cam, which is the cam profile the MS deadlock throws with. If the door instead needs a cylinder pull that carries the cylinder and gives the user something to grip, that is a different part: the Adams Rite 4024 cylinder pull mounts with a trim plate and is designed for the MS1847 deadlock and deadlatch, and the 4025 is a five pin tumbler cylinder pull with through-screws for the same MS1847. The Adams Rite 4036 is a Grade 1 five-pin mortise cylinder rated to a 1/2 inch minimum door thickness. Decide first whether the opening needs a cylinder alone or a cylinder pull assembly.
11) I need to key a knob or lever lock to match. Will a BEST 1EE mortise cylinder fit it?
No. A mortise cylinder threads into a mortise lock case; a key-in-knob or key-in-lever chassis takes a cylinder plug sized for that chassis. For those, the Kaba Ilco 1539 Series is a key-in-knob and lever universal cylinder, the 1579 Series is a knob and lever cylinder for Sargent, and the 1599 Series is a key-in-knob replacement cylinder. The Falcon A23161-05 G is a key in lever cylinder for the RU/T series in a 6-pin G keyway, keyed different with 2 cut keys. Match the cylinder to the lock chassis brand before matching the keyway.
12) My mortise lock is a Schlage L9000. Can I put a BEST 1EE in it?
The L9000 needs a mortise cylinder with the cam that lock expects. The Corbin Russwin 1080 Grade 1 Series is a 1-1/2 inch LFIC mortise cylinder, 6-pin, called out for Schlage L9000 mortise locks with an A01 Schlage L cam. The BEST 1EE is supplied with the C229 cam in right-hand or left-hand configuration, with an Adams Rite MS cam or a standard spindle available instead. Confirm the cam against the lock case before ordering either one, since the cam is what actually drives the lock.
13) Which ring comes with a BEST 1EE 7-pin mortise cylinder, and when do I need a different one?
The RP2 ring package is standard on 6 and 7-pin cylinders, with RP3 available as an upgrade. Ring selection matters because the ring takes up the gap between the cylinder collar and the door or escutcheon face, so a cylinder that sits proud or recessed is usually a ring problem, not a length problem. Ring choices cover 3E mortise, 6-pin mortise, 7-pin mortise, rim cylinder, and tapered cylinder; match the ring to the pin count you are ordering.
14) Does a 7-pin BEST cylinder work with a 6-pin BEST key system?
The 1EE is a 7-pin cylinder with standard core, so it is keyed into a 7-pin BEST system. Pin stack depth has to match the system the building is on, which is why the keymark and marking number are required at order. If your facility is standardized on 6-pin BEST cores, order the cylinder in the 6-pin configuration rather than dropping a 7-pin into that system.
15) What finishes does the BEST 1EE mortise cylinder come in for matching existing door hardware?
Ten finishes are offered on the 1EE cylinder: 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome, and 690 statuary dark bronze. Those are the standard BHMA finish numbers, so if you know the number stamped on the lock you are matching, order the same number and the cylinder face will match across the fleet.
16) What is a simpler mortise cylinder option when I do not need an interchangeable core keying system?
The BEST 1EE is built around standard core compatibility so a facility can pull and rekey cores in the field. Where that is not needed, a fixed-key mortise cylinder is a shorter order: the Detex MC65 is a 1-1/8 inch 6-pin commercial grade mortise cylinder cut to the Schlage C keyway, and the Adams Rite 4036 is a Grade 1 five-pin mortise cylinder. Those ship as a conventional cylinder rather than a housing plus core, so there is no core to specify and no keymark to supply.
17) What cylinder do I use for a deadbolt or a residential handleset instead of a BEST 1EE?
Deadbolts and handlesets take a rim-type or lazy motion cylinder matched to that lock, not a threaded mortise cylinder. The Kaba Ilco 1549 Series is a key-in-deadbolt cylinder. The Medeco 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the 1065244 is a 5-pin rim lazy motion cylinder with an Emtek tailpiece, and the 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and Emtek handleset and deadbolt outside cylinder. Emtek locks can also take the Emtek CY4 cylinder, sold each.
18) Is a full size interchangeable core cylinder the same thing as a BEST 1EE with a standard core?
They are both core-based systems but they are not cross-compatible parts. The BEST 1EE is a 7-pin slabbed lost motion mortise cylinder built for standard core compatibility. The Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam and 2 keys, and the 20-057-C is a full size interchangeable core cylinder in the C keyway, 643E aged bronze. The Schlage parts are on the rim side and keyed to Schlage; a core from one system will not drop into the other, so a facility standardizing on cores should pick one platform and stay on it.
19) For a wood door deadlatch, is the BEST 1EE the right cylinder?
A wood door deadlock with an integral cylinder pull is a different assembly. The Adams Rite 4026 is a five pin tumbler cylinder pull designed for the Adams Rite 5017 wood door deadlock and deadlatch, so it carries the cylinder and the pull as one unit. The BEST 1EE is a mortise cylinder on its own, ordered with a keyway, handing, keymark and marking number, so it suits a mortise lock case that already has its own trim.
20) What does the lost motion design on a BEST mortise cylinder actually do?
Lost motion means the cylinder plug can rotate through part of its travel before it picks up the cam, so the key does not fight the lock's internal retraction on every turn. Practically, it reduces wear on the cam and the lock parts behind it in high-traffic openings. The 1EE uses a slabbed lost motion mechanism with the C229 cam.
21) What material is the BEST 1EE cylinder body, and will it hold up on an exterior door?
Solid brass or bronze. Both resist corrosion, which is what matters on an exterior or coastal opening where a plated pot-metal cylinder pits at the keyway. For exterior use, pair the material with a finish that wears well in the weather, such as 626 satin chrome or 690 statuary dark bronze.
22) Can I install a BEST 1EE cylinder myself, or does it need the lock rebuilt?
It is a replacement part that threads into an existing compatible BEST mortise lock case, so it is a cylinder swap rather than a lock rebuild. Set the cylinder so the cam clears the lock's cam slot, then set the ring depth so the collar sits flush with the trim. BEST publishes an E Series Service Manual covering the cylinder work, and the lock case itself follows the parent device instructions.
23) If I want a specific decorative finish on a mortise cylinder, how does the BEST 1EE compare to other cylinders?
The BEST 1EE comes in a broad finish range including 605 bright brass, 606 satin brass, 611 bright bronze, 612 satin bronze, 613 satin bronze oil-rubbed, 619 satin nickel, 622 matte black, 625 bright chrome, 626 satin chrome and 690 statuary dark bronze, so it can be matched to existing trim across a building. Among the comparable cylinders, the Schlage 20-057-C is specified in 643E aged bronze. If the job is matching a dark bronze or black lever set already on the doors, the finish selection is the deciding factor as much as the cam or keyway.
How fast can I get the BEST BES-1EE7E4-C4RP3626-SC delivered?
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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 BEST BES-1EE7E4-C4RP3626-SC come with a warranty?
Absolutely. The BEST BES-1EE7E4-C4RP3626-SC 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 BEST BES-1EE7E4-C4RP3626-SC?
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