BEST 1EB Series Premium Core M...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$286.00
$261.31
BEST BEST 1EB Series Premium Core Mortise Cylinder with Dust Cover, 1-5/32" Diameter BES-1EB4-PREMIUM

BEST 1EB Series Premium Core Mortise Cylinder with Dust Cover - 1-5/32" Diameter

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Model: BES-1EB6B4-C4RP3626-PC
From the E Series Cylinders Collection
$286.00
$261.31
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$286.00
$261.31
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BEST 1EB Series Premium Core Mortise Cylinder with Dust Cover - 1-5/32" Diameter

Professional Mortise Cylinder Component

The BEST 1EB Series Premium Core Mortise Cylinder delivers professional-grade security with precision-engineered solid brass or bronze construction. Featuring a 1-5/32" diameter design, this premium cylinder accommodates both 6-pin (1-1/8" length) and 7-pin (1-9/32" length) configurations with standard 1E-C4 cam compatibility. The included dust cover provides additional protection for long-term reliability in demanding commercial applications.

Professional Features & Benefits

  • Precision Diameter: 1-5/32" diameter engineered for exact mortise lock compatibility and secure fit.
  • Flexible Pin Configuration: Available in 6-pin (1-1/8" length) and 7-pin (1-9/32" length) options for varied security requirements.
  • Premium Construction: Solid brass or bronze materials provide exceptional durability and corrosion resistance for commercial applications.
  • Standard Cam Compatibility: Includes 1E-C4 cam for seamless integration with 1E series lock mechanisms.
  • Complete Ring Packages: Standard ring packages included - RP2 for mortise 6-pin, RP3 for mortise 7-pin and rim configurations.
  • Dust Cover Protection: Integrated dust cover shields internal components from contamination and extends service life.
  • Rim Configuration Options: 6-pin (1-3/16" rim) and 7-pin (1-11/32" rim) specifications available for versatile applications.

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: 1EB Series
  • Subcategory: Parts and Accessories

Installation & Operation

This replacement cylinder component is designed for use with compatible BEST 1E series mortise locks. Refer to the parent lock installation instructions and manufacturer documentation for proper integration. Ensure compatibility with existing hardware before installation.

Professional Applications

  • Commercial Office Building Lock Upgrades
  • Educational Facility Security Systems
  • Healthcare Institution Access Control
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings
  • Retail Establishment Security
  • Industrial Facility Access Points

Why Choose BEST Quality?

BEST 1EB Series cylinders deliver professional-grade reliability with solid brass or bronze construction engineered for demanding commercial applications. The precision 1-5/32" diameter and comprehensive ring package system ensure proper fit and long-term performance. Backed by manufacturer documentation and service support for confident installation and maintenance.

Manufacturer Resources

E Series Service Manual

Product Specs

Series:
1EB 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-1EB6B4-C4RP3626-PC – Frequently Asked Questions

1) Will a BEST 1EB mortise cylinder fit my existing BEST 1E mortise lock?
The 1EB Series is a replacement cylinder for BEST 1E series mortise locks, and it ships with the 1E-C4 cam so it drops into that lock's cam pocket. Diameter is 1-5/32 inches, which is the standard mortise cylinder bore for that hardware. If the lock you are working on is a BEST 1E mortise, this is the matching cylinder. Anything else in the door needs its own cam confirmed.
2) Do I get the collar rings with the BEST 1EB cylinder or do I have to buy them separately?
Ring packages come standard: RP2 with the 6-pin mortise, RP3 with the 7-pin mortise and with rim configurations. A dust cover is included too. On the order you pick the ring style, 6-pin mortise, 7-pin mortise, 3E mortise, rim cylinder, or tapered cylinder, so match that to how the cylinder sits in the door face.
3) What do I have to specify when ordering a BEST 1EB cylinder for a master key system?
Three things are required beyond the physical options: keyway, keymark, and marking number. Keyway choices are WA, WB, WC, WD, WE, WG, WH, WK, and WY. The keymark and marking number are free text so the cylinder is cut and stamped into your existing BEST system rather than arriving keyed at random. Have your locksmith's key records in front of you before you place the order.
4) The door is an aluminum storefront with an Adams Rite MS deadlock - do I use the BEST 1EB or an Adams Rite cylinder?
Either can work, and the difference is what else the opening needs. The BEST 1EB is offered with an Adams Rite MS cam option, which lets a BEST-keyed cylinder drive an MS deadlock so the storefront stays on the same key system as the rest of the building. The Adams Rite 4036 is a five-pin mortise cylinder rated Grade 1 with a 1/2 inch minimum door thickness. If the opening needs a pull as well as a cylinder, the Adams Rite 4024 is a cylinder pull with trim plate mounting for MS1847 deadlock systems and the 4025 is a five-pin cylinder pull with through-screws for the same MS1847.
5) I need a rim cylinder, not a mortise cylinder - what should I order instead of the BEST 1EB?
Two things are worth separating. The BEST 1EB is offered with rim cylinder rings alongside 6-pin and 7-pin mortise rings, so a rim configuration exists within the same BEST keying family. If the opening is not on BEST keys, the Schlage Commercial 20-021 is a 6-pin rim cylinder with a vertical tailpiece cam and the 20-022 is the same 6-pin rim cylinder with a horizontal tailpiece cam. The tailpiece orientation has to match the exit device or rim latch behind the door, so confirm vertical versus horizontal before ordering.
6) My lock is a key-in-knob or key-in-lever, not a mortise lock - is the BEST 1EB the wrong cylinder?
Yes, that is a different cylinder body. The BEST 1EB is a mortise cylinder, ordered with mortise, rim or tapered rings. For knob and lever bodies, the Kaba Ilco 1539 is a key-in-knob and lever universal cylinder, the 1579 is a knob and lever cylinder for Sargent, and the 1599 is a key-in-knob replacement cylinder. The Falcon A23161-05 G is a key-in-lever cylinder in the RU/T series 6-pin G keyway, keyed different with two cut keys. A mortise cylinder threads into a mortise lock case and will not seat in a knob or lever chassis.
7) What is the closest equivalent to a BEST 1EB mortise cylinder if the mortise lock is a Corbin Russwin?
The Corbin Russwin 1000 Grade 1 series mortise cylinder in 1-1/2 inch length with an A02 straight cam is the mortise-cylinder counterpart on Corbin Russwin openings. The BEST 1EB is a mortise cylinder built around the 1E-C4 cam and BEST keyways WA through WY, so it follows the BEST cam and keying system; the Corbin Russwin 1000 follows the A02 straight cam pattern instead. Pick by which cam the lock body accepts, not by cylinder length alone.
8) Is a Schlage 20-057 FSIC cylinder a substitute for a BEST 1EB cylinder?
No - they are different keying architectures. The Schlage 20-057 is a 6-pin full size interchangeable core rim cylinder with a convertible tailpiece cam, and the 20-057-C is the full size interchangeable core version in the C keyway with a 643E aged bronze finish. An FSIC housing accepts a removable figure-eight core. The BEST 1EB is a conventional mortise cylinder ordered in a BEST keyway with a keymark and marking number, so its pinning lives in the cylinder itself. Swapping one for the other changes how the facility rekeys, not just the part.
9) If I am standardizing a building on interchangeable cores, does the BEST 1EB fit that plan?
It depends on which direction you are standardizing. The BEST 1EB is a conventional mortise cylinder with a 6-pin or 7-pin core, ordered against a specified keyway, keymark and marking number, which keys it into an existing BEST system. If the goal is cores a facility locksmith can pull and swap without disassembling the lock, the Schlage 20-057 6-pin FSIC rim cylinder with a convertible tailpiece cam and the 20-057-C full size interchangeable core in the C keyway are built for that. The Corbin Russwin 1080 is a 1-1/2 inch LFIC 6-pin mortise cylinder with an A01 cam sized for Schlage L9000 mortise locks, which is the large format interchangeable core approach on a mortise body.
10) What is the difference between the BEST 1EB mortise cylinder and a rim cylinder, and which one does my door need?
It depends on where the lock body sits. A mortise cylinder threads into a mortise lock case inside the door edge and turns a cam. A rim cylinder mounts through the door and drives a tailpiece into a surface-mounted rim device on the inside face. The 1EB covers both, with mortise ring packages or a rim cylinder ring package. If you are keying a surface rim exit device from another brand, straight rim housings like the Schlage 20-021 with a vertical tailpiece or the 20-022 with a horizontal tailpiece are the equivalent part.
11) Can I standardize a whole facility on BEST 1EB cylinders across different door types?
That is what the option range is for. One keyway and keymark, ordered across mortise, rim, and Adams Rite MS cam versions, puts mortise locks, rim exit devices, and aluminum storefront deadlocks on one key. Pin count has to stay consistent within the system, 6-pin or 7-pin, and each cylinder is stamped with its marking number so the key records stay traceable.
12) I have to match the finish across a floor of doors - how do the BEST 1EB finishes compare to a Schlage FSIC cylinder?
The BEST 1EB comes in ten finishes: 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. The Schlage 20-057-C full size interchangeable core cylinder is supplied in 643E aged bronze. If the existing hardware on the floor is a BHMA-numbered finish such as 626 or 613, the 1EB range gives a direct number-to-number match.
13) What is a simpler mortise cylinder option if I do not need BEST keyways or a seven-pin core?
The Detex MC65 is a 1-1/8 inch 6-pin commercial mortise cylinder supplied in the Schlage C keyway, which is a single fixed keyway and pin count. The BEST 1EB is ordered by choosing a keyway from WA through WY and a 6-pin or 7-pin type, which is what you want when the cylinder has to join an existing BEST master key system and what you do not need when the opening is standalone.
14) What cylinder replaces the one in a residential deadbolt or handleset instead of a BEST 1EB mortise cylinder?
Deadbolt and handleset cylinders are their own family. 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 lazy motion rim type 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. The Kaba Ilco 1549 is a key-in-deadbolt cylinder. These drive a bolt through a tailpiece; the BEST 1EB turns a 1E-C4 cam inside a mortise lock case.
15) Does the cam on a BEST 1EB interchange with a Corbin Russwin cloverleaf cam cylinder?
No. The BEST 1EB comes with the 1E-C4 cam, and it is also offered with an Adams Rite MS cam and a standard spindle option. The Corbin Russwin 1070 is a 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam, and the 1080 carries an A01 cam for Schlage L9000 mortise locks. Cam shape and screw pattern determine what the lock case will accept, so a cylinder chosen for the right length can still fail to retract the latch if the cam profile is wrong for that lock body.
16) What is the Corbin Russwin equivalent when I need a rim cylinder housing with a long tailpiece rather than a cam?
The Corbin Russwin 3070 is a 6-pin rim cylinder housing with a 1-7/8 inch tailpiece, from the 3000 series. That is a tailpiece-driven housing for rim applications. The BEST 1EB is offered in a rim cylinder ring configuration as well, but it is supplied with the 1E-C4 cam and BEST keyway options. Match the drive - tailpiece length versus cam - to the device on the inside face of the door.
17) Which mortise cylinder should I specify for a Grade 1 opening on an aluminum door?
The Adams Rite 4036 is a five-pin mortise cylinder rated Grade 1 in the 4036 series with a 1/2 inch minimum door thickness, which suits narrow stile aluminum. The BEST 1EB is a mortise cylinder available in 6-pin and 7-pin types with an Adams Rite MS cam option, so it can serve an aluminum door MS deadlock while keeping the opening on a BEST keyway. Choose the 4036 when the spec calls out a Grade 1 cylinder by itself, and the 1EB when the driver is keeping the opening inside an existing BEST key system.
18) For a wood door with an Adams Rite deadlatch, what takes the place of a mortise cylinder?
The Adams Rite 4026 is a five-pin tumbler cylinder pull designed for the Adams Rite 5017 wood door deadlock and deadlatch, so it covers both the pull and the cylinder on a wood door opening. The 4024 and 4025 cylinder pulls are for the MS1847 deadlock and deadlatch instead. The BEST 1EB is a mortise cylinder with a 1E-C4 cam and does not include a pull, so on a pull-required opening the cylinder pull is the part that completes the job.
19) Is the BEST 1EB cylinder solid brass, and will it hold up outdoors?
Construction is solid brass or bronze, which is why these get used on exterior and high-traffic commercial openings. The included dust cover keeps debris out of the keyway, which is the usual failure point on an outdoor cylinder that sees weather and grit.
20) Does the 3E mortise ring option mean this works on 3E hardware too?
The ring selection includes a 3E mortise ring alongside the 6-pin mortise, 7-pin mortise, rim, and tapered rings. The ring sets the collar height and profile at the door face, so pick the one that matches the prep and trim you are collaring into, not just the pin count.
21) Can I use an Emtek CY4 cylinder where a BEST 1EB mortise cylinder is called for?
They are not interchangeable. The Emtek CY4 is a cylinder sold individually for Emtek hardware, and Medeco offers retrofit cylinders built specifically for Emtek bodies - the 1065244 with an Emtek tailpiece and the 1065140 for the Emtek handleset and deadbolt outside cylinder. The BEST 1EB is a mortise cylinder in 6-pin and 7-pin types with mortise, rim and tapered ring options and the 1E-C4 cam. Emtek-specific cylinders are matched to Emtek trim, not to a mortise lock case.
How fast can I get the BEST BES-1EB6B4-C4RP3626-PC 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-1EB6B4-C4RP3626-PC come with a warranty?
Absolutely. The BEST BES-1EB6B4-C4RP3626-PC 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-1EB6B4-C4RP3626-PC?
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