BEST 1EB Series Mortise Cylind...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$167.00
$117.77
BEST 1EB Series Mortise Cylinder Less Core with Dust Cover, 1-5/32" Diameter BES-1EB4-LESSCORE

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

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Model: 1EB6B4-C4RP3626-LC
From the E Series Cylinders Collection
$167.00
$117.77
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$167.00
$117.77
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BEST 1EB Series Mortise Cylinder Less Core with Dust Cover - 1-5/32" Diameter

Professional Mortise Cylinder Component for Lock System Integration

The BEST 1EB Series Mortise Cylinder Less Core provides essential cylinder housing for mortise lock applications requiring core replacement or initial installation. This professional-grade component features a precise 1-5/32" diameter with solid brass or bronze construction for reliable performance. Available in both 6-pin (1-1/8" length) and 7-pin (1-9/32" length) configurations, the cylinder includes standard 1E-C4 cam and appropriate ring packages for seamless integration with existing BEST lock systems.

Professional Features & Benefits

  • Precision Diameter: 1-5/32" diameter ensures exact fit in mortise lock applications for proper operation and security.
  • Dual Pin Configuration: Available in 6-pin (1-1/8" length) and 7-pin (1-9/32" length) options to match specific keying requirements.
  • Heavy-Duty Construction: Solid brass or bronze material provides exceptional durability and corrosion resistance for long-term performance.
  • Standard Cam Integration: Includes 1E-C4 cam for 1E series compatibility unless otherwise specified for flexible installation options.
  • Complete Ring Package System: Mortise 6-pin includes RP2 ring package, mortise 7-pin includes RP3 ring package for proper cylinder operation.
  • Rim Configuration Support: Rim applications (6 and 7 pin) utilize RP3 ring package for versatile mounting options.
  • Professional Ordering System: Designate "B4" on step "C" of order procedure for accurate specification and delivery.

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 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

  • Mortise Lock System Maintenance
  • Lock Cylinder Replacement Projects
  • Commercial Building Security Upgrades
  • Residential Lock System Integration
  • Property Management Maintenance Programs
  • Locksmith Service Applications
  • Security System Component Replacement

Why Choose BEST Quality?

BEST 1EB Series cylinders deliver professional-grade reliability with solid brass or bronze construction engineered for demanding lock system applications. The precision 1-5/32" diameter and comprehensive ring package system ensure proper fit and operation in mortise lock installations. Engineered for demanding commercial and residential applications where dependable cylinder performance is essential.

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 1EB6B4-C4RP3626-LC – Frequently Asked Questions

1) Does the BEST 1EB mortise cylinder come with a core, or do I need to order one separately?
The 1EB Series mortise cylinder ships less core. You get the cylinder housing with a dust cover, the cam, and the ring package, but no interchangeable core and no keys. Plan on supplying a BEST removable core keyed to your system, or pulling the core out of the housing you are replacing. That is the point of the part: it lets a locksmith or a facility keep its existing keying and just swap the housing.
2) Will a 1-5/32 inch diameter cylinder thread into my mortise lock case?
1-5/32 inches is the standard mortise cylinder diameter, so the 1EB housing threads into any mortise lock case cut for a conventional mortise cylinder. What decides the fit is not the diameter but the length: at 1-1/8 inches (6-pin) or 1-9/32 inches (7-pin) plus rings, you set the face flush with the trim by adding or removing rings from the supplied package rather than by changing cylinders.
3) I need a cylinder for a rim exit device, not a mortise lock. Does the 1EB cover that?
Yes. Alongside 6-pin and 7-pin mortise, the ring choices include Rim Cylinder, 3E Mortise, and Tapered Cylinder, so you can order the 1EB configured for a rim device. Rim applications in both 6 and 7 pin use the RP3 ring package. If you want a rim housing from another line, the Schlage 20-021 uses a vertical tailpiece cam and the 20-022 a horizontal one, and the Corbin Russwin 3070 is a 6-pin rim housing with a 1-7/8 inch tailpiece.
4) Should I buy a less-core cylinder housing or a complete keyed cylinder?
Go less core when the building already runs BEST interchangeable cores and a master key system, since you reuse the core and the keying stays intact. Buy a complete keyed cylinder when there is no core on hand or no existing system to match. Fixed-cylinder alternatives include the Corbin Russwin 1000 Grade 1 mortise cylinder at 1-1/2 inches with an A02 straight cam, the Detex MC65 6-pin mortise cylinder at 1-1/8 inches in Schlage C keyway, and the Adams Rite 4036 five-pin Grade 1 mortise cylinder.
5) What is the difference between a BEST 1EB mortise cylinder less core and a Corbin Russwin 1000 mortise cylinder?
They solve the same opening two different ways. The BEST 1EB is a housing supplied less core, so you install your own interchangeable core to bring it onto an existing BEST keying system, and it ships with the 1E-C4 cam unless another cam is specified. The Corbin Russwin CR1000-112 is a 1000 series mortise cylinder in a 1-1/2 inch length with an A02 straight cam. If the building is already keyed to a BEST core system, the 1EB housing keeps that core in play; if you are working a Corbin Russwin keyway with a straight cam requirement, the 1000 series is the direct fit.
6) The opening is an aluminum storefront with an Adams Rite MS deadlock. Do I order a BEST 1EB or an Adams Rite cylinder?
Both are live options and the difference is the cam. The BEST 1EB is offered with an Adams Rite MS cam as one of its cam options, which lets a BEST core 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, Grade 1, in the 4036 series with a 1/2 inch minimum door thickness. Choose the 1EB with the MS cam if you are keying to BEST cores; choose the 4036 if the storefront is standing alone on an Adams Rite keyway.
7) Can I use a BEST 1EB mortise cylinder to replace a cylinder in a key-in-knob or key-in-lever lockset?
No. The 1EB is a mortise cylinder housing, threaded for a mortise lock case, and it will not drop into a knob or lever chassis. For those, 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. If the lock being rekeyed is a deadbolt, the Kaba Ilco 1549 is the key-in-deadbolt cylinder in that family.
8) Is a rim cylinder the same thing as a mortise cylinder less core?
No, and mixing them up is the most common ordering error on exit device jobs. A mortise cylinder threads into the lock case; a rim cylinder mounts through the door with a tailpiece driving the device. The BEST 1EB does cover rim configurations in its ring options, with 6-pin and 7-pin rim applications using the RP3 ring package. On the Schlage side, the 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. Confirm which tailpiece orientation the exit device needs before ordering either.
9) What is the Schlage equivalent to a BEST less core interchangeable core cylinder?
For a rim opening, the Schlage 20-057 is a 6-pin FSIC rim cylinder with a convertible tailpiece cam, and the 20-057-C is the full size interchangeable core version in a C keyway, finish 643E aged bronze. The BEST 1EB is the corresponding less core housing on the BEST side and takes the BEST core you supply. The practical difference is which core family and keyway the facility already stocks, since the housing has to match the core you carry on the truck.
10) What finishes does the BEST 1EB mortise cylinder come in for matching existing trim?
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. For a building standardizing across doors, 626 satin chrome and 613 oil-rubbed are the two most common existing-trim matches. The housing is solid brass or bronze underneath the finish.
11) How do I specify a BEST 1EB less-core cylinder when ordering?
Four things settle the order: pin count (6 or 7), the ring package that matches the application (3E mortise, 6-pin mortise, 7-pin mortise, rim, or tapered), the cam or spindle (standard 1E-C4, Adams Rite MS cam, or standard spindle), and the finish. On the BEST order procedure the less-core housing is designated B4 at step C.
12) I have BEST interchangeable cores but the housing is on a Schlage L9000 mortise lock. What do I use?
That is a two-part question. The 1EB housing is built around BEST 1E series geometry with the 1E-C4 cam. For an interchangeable-core housing intended for Schlage L9000 mortise locks, the Corbin Russwin 1080 is a 1-1/2 inch LFIC 6-pin mortise cylinder specified for L9000 locks with an A01 Schlage L cam. Cores are not cross-brand interchangeable, so confirm the core format matches the housing you pick.
13) What is the difference between a BEST 1EB mortise cylinder and an Adams Rite cylinder pull?
They are not the same part and cannot be swapped. The 1EB is a mortise cylinder housing that goes into the lock case. The Adams Rite 4024 is a cylinder pull with a trim plate mounting, the 4025 is a five pin tumbler cylinder pull with through-screws, and all three of those are built for the Adams Rite MS1847 deadlock or deadlatch; the 4026 is the five pin tumbler cylinder pull for the 5017 wood door deadlock or deadlatch. A cylinder pull gives you a gripping surface plus the cylinder in one assembly, which is a different piece of trim from a bare mortise housing.
14) If I do not need an interchangeable core, what is a simpler mortise cylinder than the BEST 1EB?
A conventional keyed mortise cylinder is the simpler part, because it arrives complete instead of needing a core supplied separately the way the 1EB does. The Detex MC65 is a mortise cylinder with a Schlage C keyway, 1-1/8 inch, 6-pin, commercial grade. The Corbin Russwin CR1070-114-A01 is a 1070 Grade 1 series 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam. Pick by the cam the lock case requires and the keyway your building is already on.
15) I have a Corbin Russwin 3070 rim cylinder housing on the door. Is the BEST 1EB a drop-in replacement?
Not as a mortise cylinder. The Corbin Russwin 3070-178 is a 3000 series 6-pin rim cylinder housing with a 1-7/8 inch tailpiece, so any replacement has to be a rim cylinder with a tailpiece the device accepts, not a mortise housing. The 1EB is available in a rim configuration with its own ring package, and if you go that route you are moving the opening onto a BEST core, so verify the tailpiece drives your exit device before you pull the old housing.
16) What should I use instead of a BEST 1EB on a residential handleset or Kwikset deadbolt?
Those openings take a rim type lazy motion cylinder rather than a mortise housing. 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. For Emtek trim, 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 the Emtek handleset and deadbolt outside cylinder. Emtek also lists the CY4 cylinder as its own part.
17) What is the dust cover on the BEST 1EB cylinder for?
The dust cover closes off the core cavity while the housing sits without a core in it, keeping debris out of the pin chamber area during storage and rough construction. It is not a security feature. Once the interchangeable core goes in, the cover comes out.
18) Is the BEST 1EB cylinder brass or plated pot metal?
Solid brass or bronze, not plated zinc. That matters on exterior openings and coastal or high-humidity sites where a pot-metal housing corrodes in the mortise and seizes the core retainer. The finish is applied over the brass or bronze body.
19) Which cylinder do I order for a Falcon lever lockset if the BEST 1EB will not fit?
The Falcon A23161-05 G is a key in lever cylinder for the RU/T series with a 6-pin G keyway, keyed different, and it comes with two cut keys. That is a lever cylinder, so it goes into the lever chassis; the BEST 1EB is a mortise cylinder housing and belongs in a mortise lock case. Match the part to the lock body you actually have on the door.
20) For standardizing a facility on one cylinder, how does the BEST 1EB compare to the Corbin Russwin mortise cylinders?
The 1EB approach standardizes on the core: one less core housing family covers 6-pin and 7-pin mortise as well as rim applications, and the finish range runs from 605 bright brass and 606 satin brass through 626 satin chrome and 690 statuary dark bronze, so one core stock serves several openings. The Corbin Russwin side standardizes on the complete cylinder instead, with the CR1070-114-A01 as a 1070 Grade 1 series 1-1/4 inch 6-pin mortise housing and the CR1000-112 as a 1000 Grade 1 series cylinder at 1-1/2 inch. One route keeps your keying in one core; the other keeps your ordering to one finished part number per length.
How fast can I get the BEST 1EB6B4-C4RP3626-LC 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 BEST 1EB6B4-C4RP3626-LC come with a warranty?
Absolutely. The BEST 1EB6B4-C4RP3626-LC 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 1EB6B4-C4RP3626-LC?
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
Why buy the BEST 1EB6B4-C4RP3626-LC from ZenSupply?
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