Schlage B502-949 Modular Cylin...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$2.60
$1.99
Schlage B502-949 Modular Cylinder Driver Replacement Part for Lazy Tailpiece

Schlage B502-949 Modular Cylinder Driver Replacement Part for Lazy Tailpiece

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Model: B502-949

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

$2.60
$1.99
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Schlage B502-949 Modular Cylinder Driver Replacement Part for Lazy Tailpiece

The Schlage B502-949 is a purpose-built driver replacement part designed for use with Schlage modular cylinder lazy tailpiece assemblies. Engineered to restore proper cylinder operation in commercial door hardware applications, this genuine Schlage component ensures precise fit and reliable performance within compatible cylinder configurations. As a factory-specification replacement part, the B502-949 supports the continued function of Schlage modular cylinder systems in demanding commercial environments.

Key Features

  • Genuine Schlage Component: Factory-specification driver part engineered specifically for Schlage modular cylinder assemblies, ensuring accurate fit and dependable performance.
  • Lazy Tailpiece Compatibility: Designed specifically for use with Schlage modular cylinder lazy tailpiece configurations, maintaining proper cylinder engagement and operation.
  • Commercial-Grade Quality: Built to Schlage's commercial hardware standards, supporting reliable function in high-demand door hardware applications.
  • Direct Replacement Design: Serves as a precise replacement driver to restore cylinder performance without requiring full assembly replacement.
  • Modular System Support: Integrates seamlessly within Schlage's modular cylinder platform for streamlined maintenance and service.

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: B502-949
  • Features: Schlage Parts

Typical Applications

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

Why Schlage B502-949?

Schlage replacement parts like the B502-949 deliver the fit and function that commercial door hardware professionals depend on, sourced directly from the original manufacturer's specifications. Using genuine Schlage components ensures compatibility with existing modular cylinder assemblies, reducing service time and maintaining the performance integrity of the overall locking system. For facilities managers and locksmiths seeking reliable, application-specific replacement parts, the B502-949 represents a trusted solution within the Schlage commercial hardware ecosystem.

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:
B502-949
Features:
Schlage Parts

Schlage B502-949 – Frequently Asked Questions

1) What exactly is the Schlage B502-949, and is it a complete cylinder?
The B502-949 is a single replacement driver part used inside Schlage modular cylinder lazy tailpiece assemblies, not a complete cylinder. If you need a full keyed cylinder, this is the wrong item. Order it when the driver in an existing modular cylinder assembly has failed and you want to service the assembly rather than replace the whole thing.
2) Will the B502-949 driver work in any Schlage cylinder, or only certain ones?
It is built specifically for Schlage modular cylinder assemblies using a lazy tailpiece configuration. It is not a universal driver, and there is no stated fit to conventional (non-modular) Schlage cylinders or to other brands' cylinders. Verify the assembly you are servicing is a Schlage modular cylinder with a lazy tailpiece before ordering.
3) If the whole cylinder needs replacing rather than just the driver, what complete lazy-motion cylinders are available?
The Schlage B502-949 is a replacement driver part for modular cylinder lazy tailpiece assemblies, so it only restores that one component. When the cylinder itself has to be swapped out, Medeco offers complete lazy-motion units: the 1075127 is a 5-pin rim type lazy motion single cylinder for handlesets and deadbolts, the 1012040 is a 6-pin lazy motion rim cylinder for Kwikset single cylinder deadbolts, and the 1065244 is a 5-pin rim lazy motion cylinder supplied with an Emtek tailpiece. Those are full cylinders with their own keying, not a driver component.
4) What looks like a substitute for a Schlage B502-949 driver but is not?
Anything sold as a cylinder rather than a component. The B502-949 is a driver piece inside a modular cylinder lazy tailpiece assembly. Items such as the BEST 1C Series standard 5-pin cylinder core, the Corbin Russwin 1000 Series mortise cylinder in 1-1/2 inch length with an A02 straight cam, or the Detex MC65 mortise cylinder with Schlage C keyway are keyed cylinders or cores in their own right. They replace the locking cylinder, not the driver that transmits motion to the tailpiece, and they will not drop into the place a B502-949 occupies.
5) On an aluminum storefront with an Adams Rite deadlock, does the B502-949 apply?
It does not. The B502-949 is a Schlage modular cylinder driver component for lazy tailpiece assemblies. Adams Rite storefront hardware is served by its own parts: the 4024 cylinder pull with trim plate mounting and the 4025 five pin tumbler cylinder pull with through-screws are both designed for use with the Adams Rite MS1847 deadlock/deadlatch, and the 4026 five pin tumbler cylinder pull is for the Adams Rite 5017 wood door deadlock/deadlatch. Confirm which deadlock is in the door before ordering.
6) What is a lazy tailpiece, and why does the driver matter?
A lazy tailpiece is a free-floating tailpiece that rotates only when the key turns the plug, rather than being fixed to it. The driver is the part that transfers plug rotation to that tailpiece, so a worn or broken driver shows up as a key that turns but a bolt that does not throw. The B502-949 restores that engagement inside Schlage modular cylinder assemblies.
7) Does the B502-949 come keyed, or with keys?
No. It is a driver component only, with no plug, pins, or keys. Keying happens in the cylinder itself. If you are standardizing keying across a facility, look at a keyed cylinder such as the Detex MC65 mortise cylinder in Schlage C keyway, 1-1/8 inch 6-pin, rather than this service part.
8) For a mortise lock opening instead of a modular lazy tailpiece cylinder, what should I order?
The Schlage B502-949 driver serves modular cylinder lazy tailpiece assemblies and has no role in a mortise lock case. For mortise prep, look at the Corbin Russwin 1070 Grade 1 Series 1-1/4 inch 6-pin mortise housing with an A01 cloverleaf cam, the Corbin Russwin 1000 Series 1-1/2 inch cylinder with an A02 straight cam, or the Adams Rite 4036 Grade 1 mortise cylinder with five-pin security. The cam style is what has to match your lock case.
9) We key our whole facility on interchangeable cores - is the B502-949 part of that kind of system?
No. The B502-949 is a Schlage commercial replacement driver for modular cylinder lazy tailpiece assemblies, a service component rather than a keyed core. Facilities standardizing on interchangeable core typically spec BEST cores such as the 1CB Peaks 150 Series interchangeable core cylinder or the 1CDF drill resistant patented interchangeable core 7-pin brass 150 Series, or a large format interchangeable core cylinder like the Corbin Russwin 1080 Series 1-1/2 inch 6-pin LFIC. Those let you rekey by pulling the core; the B502-949 addresses cylinder mechanics, not keying.
10) Is there a retrofit cylinder option for a key-in-knob or key-in-lever lock instead of this driver part?
The Schlage B502-949 is a driver for modular cylinder lazy tailpiece assemblies and does not serve knob or lever cylinders. For those, Kaba Ilco offers the 1539 Series key-in-knob/lever universal cylinder, the 1599 key-in-knob replacement cylinder, and the 1579 knob and lever cylinder for Sargent, while Falcon lists the A23161-05 G key-in-lever cylinder in the RU/T Series 6-pin G keyway, keyed different with two cut keys. Medeco's 1065140 is a 5-pin retrofit cylinder for the Arrow JL interconnected lock and Emtek handleset and deadbolt outside cylinder.
11) What is the difference between the Schlage B502-949 and a rim cylinder housing like the Corbin Russwin 3070?
The B502-949 is a single genuine Schlage driver piece that restores operation inside a modular cylinder lazy tailpiece assembly without replacing the whole cylinder. The Corbin Russwin 3070 is a complete 6-pin rim cylinder housing supplied with a 1-7/8 inch tailpiece in the 3000 Series, and BEST's 12E Series dummy rim cylinder with a 1-5/32 inch diameter fills a rim opening with no keying at all. Choose the B502-949 for component-level service and a rim housing when the cylinder body itself is being replaced.
12) Is the B502-949 suitable for commercial buildings or is it a residential part?
It is catalogued as a commercial door hardware part, built to Schlage's commercial hardware standards. Typical use is service work in offices, schools, healthcare, government buildings, retail, warehouses, and multi-tenant residential properties where Schlage modular cylinders are already installed.
13) Is the B502-949 a genuine Schlage part or an aftermarket copy?
It is a genuine Schlage factory-specification component, model B502-949. That matters on modular cylinder service work, since the driver has to index correctly with Schlage's own tailpiece geometry for the assembly to turn properly.
How fast can I get the Schlage B502-949 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 Schlage B502-949 come with a warranty?
Absolutely. The Schlage B502-949 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 Schlage B502-949?
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 Schlage B502-949 from ZenSupply?
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