The electric strike has evolved over the years to include specialized applications as well as very compact sizes. The latest in this evolutionary process is the Trine Axion 4850, a one-half-inch thick surface mount electric strike designed specifically for Pullman Bolt equipped rim exit (panic) devices.
According to Trine, this BHMA Grade 1 rated electric strike has been tested to 1.5 million cycles, provides a holding force of 1500 pounds and dynamic force is 70 ft/lbs.
The minimal projection of the Axion 4850 stainless steel body permits this electric strike to be used for rim exit device applications where the lock side of the door and jamb area has limited space.
The Trine Axion 4850 lock mechanism is two stainless steel U-shaped latches that form a rectangular pocket when in the locked position. When the door closes, the Pullman Bolt retracts as it slides over the latch fronts and extends into the pocket created by the latches. The two latches on the 4850 electric strike have a unique contoured surface to accommodate the extended curvature of the bolt when the door is closed. The latches’ relatively large mating surface area contact is designed to keep the Pullman Bolt trapped by providing additional support and to resist forced entry.
The Axion 4850 operates using one field configurable solenoid that controls the two latches. When configured to the Fail Secure mode, the solenoid is powered only to release the captured Pullman Bolt in order to provide access into the facility. As the electric strike is powered, the solenoid plunger retracts into the solenoid body rotating the Fail Secure actuator cam, which in turn depresses the locking collar. When the locking collar is depressed, the two latches are free to swing outward and release the Pullman Bolt, as the door is pulled open from the exterior. Egress is controlled by the exit device and is normally free.
When the Axion 4850 is configured to Fail Safe mode, the solenoid is continuously powered to lock the two latches, keeping the door locked. When power is removed, the spring contracts, extending the solenoid plunger. This movement rotates the Fail Safe actuator cam that depresses the locking collar. With the locking collar depressed, the two latches are free to release the Pullman Bolt, as the door is pulled open from the exterior.
The actuator cam and the solenoid plunger determine the mode of operation of the 4850 electric strike. The Fail Safe actuator cam can be identified by the “X” and the Fail Safe solenoid plunger can be identified by the red spring. The Fail Secure solenoid plunger can be identified by the blue colored spring.
The Trine Axion 4850 comes in one configuration with the ability to operate the solenoid using 11 through 30 Volts Direct Current (VDC). The built-in circuitry is designed to accommodate variations in voltage as well as provide protection against surge and kickback. The 4850 solenoid has been designed to conform to both intermittent and continuous duty applications.
The electrical characteristics of the Trine Axion 4850 are shown in chart 1.
Important: Before installing the electric strike, make sure the door operates properly and the door closer closes the door. If not, make all necessary repairs before installing an electric strike.
This surface mounted electric strike is nine inches tall with the two latches centered in the body. The strike’s width is 1-3/4”. Two mounting holes are along each end being approximately 1/2” long horizontal oval opening permitting precise inward and outward adjustments. Two 1/4-20 hex head screws secure the Axion 4850 onto the jamb.
When installing the Axion 4850 onto an aluminum jamb, Trine recommends using 1/4-20 nutserts. I recommend using nutserts on metal jambs whose gauge is 14 or smaller.
For metal jambs 12 gauge or thicker, use a #30 drill bit to drill, then tap the two holes for the 1/4-20 mounting screws. For aluminum jambs and thin metal jambs, use the 19/64” diameter drill bit to drill the two holes for the 1/4-20 nutserts. Tap the two holes using the 1/4-20 tap before installing the nutserts.
To strengthen the installation of the Axion 4850, Trine has patented an anchoring system for their 4800 series surface mounted electric strikes. Up to four #7 drill bit holes are drilled into the jamb at specific locations that correspond to the openings in the 4850 body and 1/8” thick spacer plate. Then up to four anchoring system pins are installed into the openings in the strike body. When the electric strike is installed, the anchor pins slide into the jamb. These pins add additional mounting strength to resist sideways pressure such as attempted forced opening.
The Trine Axion 4850 comes standard with the 1/8” spacer plate which acts as a mounting template, two sealed crimp connectors, quick connect socket and wire assembly and the Fail Safe and Fail Secure spring/solenoid plungers and actuator cams.
The only available option for the Axion 4850 is the finish, either Satin Stainless Steel - 32D or Dark Bronze - 10B.
For more information, contact your local locksmith wholesaler or Trine Access Technology, 1440 Ferris Place, Bronx, NY 10461. Telephone: 718-829-2332. Fax: 718-829-6405
Because no cut is required in the jamb, surface-mounted electric strikes have become a viable choice.