BEST 8KW Series Grade 1 Electr...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$1,673.00
$928.27
BEST BEST 8KW Series Electrically Locked Function (Fail-Secure) Grade 1 Electromechanical Cylindrical Knob Locks BES-8KW-DEU

BEST 8KW Series Grade 1 Electromechanical Cylindrical Knob Lock with Fail-Secure Operation

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Model: 8KW37DEU4CSTK626
$1,673.00
$928.27
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$1,673.00
$928.27
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BEST 8KW Series Grade 1 Electromechanical Cylindrical Knob Lock with Fail-Secure Operation

Professional Remote Access Control Solution

The BEST 8KW Series electromechanical cylindrical knob lock provides secure remote locking and unlocking capabilities for commercial applications. This Grade 1 heavy-duty lock operates at 12V AC/DC (0.50 amps) or 24V AC/DC (0.18 amps) with fail-secure (electrically unlocked) operation and is designed for doors 1-3/4" to 2-1/4" thick. UL listed for electrically-controlled single point locks and approved by California State Fire Marshal for 3-hour fire-rated applications.

Professional Features & Benefits

  • Door Thickness Compatibility: Standard configuration for doors 1-3/4" to 2-1/4" thick accommodating most commercial door applications.
  • Dual Voltage Operation: 12V AC/DC at 0.50 amps or 24V AC/DC at 0.18 amps with supplied Temperature Control Module (TCM) for flexible system integration.
  • Fail-Secure Operation: Electrically unlocked (EU) function provides secure locking when power is removed, ideal for high-security applications.
  • Grade 1 Heavy-Duty Construction: Lock chassis meets ANSI/BHMA A156.2 Series 4000 Grade 1 standards for demanding commercial use.
  • Non-Handed Installation: Non-handed levers simplify installation and reduce inventory requirements for any door configuration.
  • Integrated Smart Features: Built-in request-to-exit sensor and door contact sensors with Intelligent System Controller (ISC) embedded behind escutcheon.
  • Fire Rating Compliance: UL listed for 3-hour A label single doors up to 4' x 10' for life safety applications.
  • Manufacturer Warranty: 10 Year Limited warranty provides long-term protection and confidence.

Technical Specifications

Types

  • 12 volts AC/DC when used with supplied TCM — 0.50 amps
  • 24 volts AC/DC when used with supplied TCM — 0.18 amps
  • All EU functions: Electrically Unlocked (Fail Secure)
  • All EL functions: Electrically Locked (Fail Safe)

Approval Listings

  • UL listed for GYQS Electrically- controlled singlepoint locks or latches.
  • This product has been approved by the California State Fire Marshal (CSFM) pursuant to section 13144.1 of the California Health and Safety Code.
  • Approved by the city of New York Board of Standards and Appeals under calendar number 730-89-SA. See CSFM listing No. 4136-1175:103. It is subject to re-examination, revision and possible cancellation

Door thickness

  • Standard lock configuration designed for doors 1 3/4" – 2 1/4" thick. NOTE: All W-series locks require the use of a (TCM) Temperature Control Module. A TCM and TCM connector are supplied standard with every order.

Installation & Operation

  1. Verify electrical requirements match available power supply. Confirm voltage (12V AC/DC or 24V AC/DC) and current capacity before proceeding.
  2. Disconnect power supply before beginning installation. Follow all applicable electrical codes and safety procedures.
  3. Mount the unit in the specified location ensuring adequate clearance for wiring access, ventilation, and future service requirements.
  4. Route and connect wiring according to manufacturer wiring diagrams. Use appropriate wire gauge and connectors for the application.
  5. Configure operational settings including fail-secure operation per application requirements.
  6. Restore power and test all functions including normal operation, request-to-exit sensor, door contact sensors, and integration with connected access control systems.
  7. Complete final inspection and document settings. Refer to manufacturer documentation for complete wiring diagrams, programming instructions, and troubleshooting.

Professional Applications

  • Commercial Building Security Systems
  • Healthcare Facility Access Control
  • Educational Institution Safety Systems
  • Government and Municipal Buildings
  • Industrial Facility Monitoring
  • Multi-Tenant Residential Properties
  • Emergency Exit Compliance

Why Choose BEST Quality?

BEST 8KW Series electromechanical locks deliver professional-grade reliability with corrosion-treated steel construction and Grade 1 heavy-duty performance rated to ANSI/BHMA A156.2 standards. The 10 Year Limited warranty provides added confidence and protection. UL listed and California State Fire Marshal approved, these locks are engineered for demanding commercial applications where dependable remote access control and fire safety compliance are essential.

Product Specs

Series:
9KW Series
Subcategory:
Bored Locksets
Grade:
Grade 1
Duty Level:
Heavy Duty
Handle Type:
Knob
Keyed Function:
Single Cylinder
Warranty:
10 Year Limited
Product Group:
Mechanical Locks
Product Subgroup:
Bored Locksets
Product Type:
Electromechanical Knobsets
Keyed:
Yes
Electronic:
Yes
Commercial/Residential:
Commercial
Lock Type:
Cylindrical
Product Attribute:
Cylindrical Locks
Product Function:
Fail-Secure
Door Hand Direction:
Non-Handed
Product Category:
Mechanical Locks
Product Substrate:
Corrosion-Treated Steel
Department:
Door Hardware

BEST 8KW37DEU4CSTK626 – Frequently Asked Questions

1) Will the BEST 8KW electromechanical knob lock fit a 2-inch thick door?
Yes. The 8KW cylindrical knob lock is built in its standard configuration for doors 1-3/4 inches through 2-1/4 inches thick, so a 2 inch door falls inside the range without any special ordering. That upper end covers the heavier commercial and institutional doors that a normal 1-3/4 inch cylindrical lock will not span.
2) What backsets does the BEST 8KW knob lock come in, and which one do I need?
Three backsets are offered on the 8KW: 2-3/4 inches, 3-3/4 inches, and 5 inches. Measure from the door edge to the center of the existing bore. 2-3/4 inches is the standard commercial cylindrical backset and covers most openings; the 3-3/4 and 5 inch options exist for wide-stile and specialty doors where the bore sits farther in from the edge. Order the one that matches the hole already in the door, because a cylindrical chassis will not stretch to a different backset.
3) Does the BEST 8KW knob lock stay locked or unlocked when the power goes out?
It stays locked. The 8KW is a fail-secure, electrically unlocked (EU) function lock: power is what releases the outside knob, so cutting power leaves the door secured. Key override and free egress from the inside remain regardless. If your application needs the opposite behavior, doors that must release on a fire alarm or power loss, you want an EL (electrically locked, fail safe) function instead, which BEST builds in the same W series family.
4) What voltage and current does the BEST 8KW electromechanical lock draw?
Dual voltage. The 8KW runs on 12 volts AC or DC at 0.50 amps, or 24 volts AC or DC at 0.18 amps, in both cases through the supplied Temperature Control Module. Size the power supply off the current figure for the voltage you are actually running, and remember every lock on the run adds to that total. Voltage is a required selection when ordering, 12VDC or 24VDC.
5) Do I need to order anything extra to make the BEST 8KW lock work?
The Temperature Control Module is the one part every W series lock requires, and BEST supplies a TCM plus its connector as standard with every order, so there is nothing separate to buy for that. What you do specify at order time is voltage (12VDC or 24VDC) and whether you want the request-to-exit option. Beyond the lock itself you still need the power supply, the access control panel or reader, and the door cord or transfer hinge to get power across the gap.
6) Can the BEST 8KW knob lock go on a fire-rated door?
It is approved for fire-rated openings. The 8KW is UL listed under GYQS for electrically controlled single point locks or latches and is UL listed for 3-hour A label single doors up to 4 feet by 10 feet. The California State Fire Marshal has approved it under section 13144.1 of the Health and Safety Code, and it is accepted by the New York City Board of Standards and Appeals under calendar number 730-89-SA.
7) Which strike comes with the BEST 8KW lock and will it drop into my existing frame prep?
Two strike choices. The S3 is the 4-7/8 inch ANSI strike, which is the standard commercial frame prep on hollow metal and what most existing openings are already cut for. The STK is a 2-3/4 inch ANSI strike for frames prepped with the shorter lip cutout. Check what is in the frame now and match it, since swapping strike lengths means new frame prep.
8) Does the BEST 8KW lock have built-in request-to-exit and door position monitoring?
Yes, the electronics are in the lock. The 8KW carries a request-to-exit sensor and door contact sensors with the Intelligent System Controller embedded behind the escutcheon, so you are not surface-mounting a separate REX or door position switch above the frame. Request-to-exit is a required choice when you order, yes or no, so pick it up front if your panel needs the signal for alarm shunting.
9) Do I have to specify handing for the BEST 8KW knob lock?
No handing to figure out. The 8KW is non-handed, so one lock works on a left or right hand door in either swing. For a property manager or integrator stocking spares across a building, that means a single part number covers every opening instead of splitting your shelf between LH and RH.
10) Is the BEST 8KW knob lock heavy-duty enough for a school or hospital corridor?
The chassis is Grade 1 heavy duty, rated to ANSI/BHMA A156.2 Series 4000, which is the top commercial grade for bored locks and the level specified for high-traffic institutional corridors. Construction is corrosion-treated steel. For an MRO or facilities buyer standardizing across a campus, this is the grade that belongs on classroom, patient room, and back-of-house doors that cycle all day.
11) What knob and rose styles are available on the BEST 8KW, and will they match my other doors?
Two knob designs, round (4) and tulip (6), on four rose options: C rose is a 3 inch convex, D rose is a 3-1/2 inch convex, K rose is the 3 inch convex without a ring, and L rose is the 3-1/2 inch convex without a ring. Finishes run bright brass (605), satin brass (606), bright bronze (611), satin bronze oil-rubbed (613), satin nickel (619), bright chrome (625), satin chrome (626), and statuary dark bronze (690). If you are adding access control to a few doors in a building already fitted with BEST knobs, pick the rose diameter and finish number off an existing lock so the electrified opening does not stand out.
12) Is the BEST 8KW electromechanical lock keyed, and does it take a key override?
Yes, it is a keyed single cylinder lock, so there is mechanical key access in addition to the electronic control. That matters on an access control opening: when the panel is down or the network drops, a locksmith or maintenance tech still gets in with a key rather than drilling the lock.
13) Should I use an electrified cylindrical knob lock or a mortise lock for adding access control to an existing door?
A cylindrical lock like the 8KW installs into the standard bored prep already in most commercial doors, so you are not cutting a new mortise pocket into an existing leaf. That is the reason to pick it on a retrofit. A mortise lock takes a rectangular pocket in the door edge and is the choice when you are specifying new doors or need functions a bored chassis cannot do. Either way, the 8KW brings its own request-to-exit and door contact sensors, which saves running separate devices at the frame.
How fast can I get the BEST 8KW37DEU4CSTK626 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 8KW37DEU4CSTK626 come with a warranty?
Absolutely. The BEST 8KW37DEU4CSTK626 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 8KW37DEU4CSTK626?
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 8KW37DEU4CSTK626 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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