DXL Mechanical Safety Door Bolt
The hardware half of a proper fence-gate locking point: a million-cycle slide bolt that positions and holds the gate — pre-drilled so your DX interlock switch bolts straight on.
- 48 mm bolt travel; accepts 1-10 mm door gaps
- Rated 1,000,000 mechanical operations
- Mounts DX-W2 / W3 / D2 / D3 switches — no field drilling
- Zinc-alloy (DXL-A) or aluminum-alloy (DXL-B) bodies
- Five variants for different widths and handle reach
Why Gates Need a Bolt and a Switch
An interlock switch alone does not make a good fence gate. Wire mesh doors flex, profile gates rattle, and a switch head was never meant to be the thing that mechanically registers a door in its frame. The DXL splits the job properly: a 48 mm slide bolt takes the mechanical role — locating the gate, holding it against vibration, tolerating 1-10 mm of built-in gap error — while the interlock switch mounted on the bolt's pre-drilled pattern does what it is good at: reporting to the safety circuit.
The pattern accepts four switch families directly. Pair with a DX-D2/D3 for monitoring-only gates, or a DX-W3 / DX-W2 solenoid lock when the gate must stay shut through coast-down. The result is the classic two-stage sequence: the operator throws the bolt, the switch proves it, and the DQSRN or DA31 safety relay lets the line run.
Some catalog pages print the family as DXSL — the A/B body styles and variant structure are the same product line described here.
Bolt Travel & Switch Position, Schematically
Original schematic — proportions and the switch/actuator linkage are illustrative; use the datasheet drawings for fabrication.
Technical Specifications
| Output | None — purely mechanical bolt; electrical monitoring via mounted DX switch |
|---|---|
| Bolt travel | 48 mm |
| Door gap range | 1-10 mm |
| Mechanical life | 1,000,000 operations |
| Switch mounting provision | Pre-drilled for DX-W2 / DX-W3 / DX-D2 / DX-D3 |
| DXL-A construction | Zinc-alloy base and slide handle + stainless steel handle; 0.6 kg |
| DXL-A handle rod | A-1 = 79 mm; A-2 = 106 mm |
| DXL-B construction | Aluminum-alloy base and slide handle + stainless handle + plastic ball knob; Ø15 mm rear release hole |
| DXL-B mounting plate | B-1 / B-2 = 326 mm; B-3 = 305 / 284 mm |
| Holding-force rating | Not published for the bolt mechanism — use a DX-W solenoid lock (1300 N) where a quantified figure is required |
Variant Chooser
| Variant | Body | Distinguishing spec | Pick it when… |
|---|---|---|---|
| DXL-A-1 | Zinc alloy | 79 mm handle rod | Tight clearance around the gate frame |
| DXL-A-2 | Zinc alloy | 106 mm handle rod | More reach past frame profiles |
| DXL-B-1 / B-2 | Aluminum alloy | 326 mm mounting plate, ball knob, rear release hole | Standard profile-fence hole spacing |
| DXL-B-3 | Aluminum alloy | 305 / 284 mm mounting plate | Narrower frame hole patterns |
DXL-B Series
Typical Applications
Robot-Cell Fence Gates
Bolt + DX-W3 solenoid lock = a gate that is physically held and electrically proven closed.
Press & CNC Line Guard Gates
1-10 mm gap tolerance suits fabricated steel-mesh and profile gates around production lines.
Aluminum-Profile Fencing
B-series mounting plates (326 / 305 / 284 mm) align with common profile-fence hole spacing.
Two-Stage Door Securing
Operator bolts the door first; the mounted interlock then verifies closure to the safety circuit.
Interlock Retrofits
Add electrical monitoring to a mechanical-only gate using the pre-drilled switch pattern — no new drilling.
Standardized Gate Hardware
Five variants cover different widths and handle reaches with one bolt family across the plant.
Frequently Asked Questions
The DXL has no wires — what is it actually for in a safety system?
It is the mechanical positioning-and-holding half of a gate locking point. The slide bolt physically registers and holds the fence door; the pre-drilled pattern on its base then accepts a DX-W2, DX-W3, DX-D2 or DX-D3 interlock switch whose actuator key rides on the bolt assembly. The bolt gives the door its mechanical integrity, the switch gives the safety circuit its signal — deliberately separate jobs.
Which switch should I pair with the DXL on a robot-cell gate?
If entering the cell while the robot coasts is the hazard, mount a solenoid-locking DX-W3 (compact) or DX-W2 (more contacts) so the bolt cannot be operated until the controller releases the lock. If the hazard stops immediately and you only need a door-closed signal, a DX-D2/D3 monitoring switch is sufficient and cheaper. In both cases wire the NC channels to a DQSRN or DA31 safety relay.
DXL-A or DXL-B — how do the two body styles differ in practice?
DXL-A uses a zinc-alloy base and slide with a stainless handle (0.6 kg); its two variants differ in handle-rod length, 79 mm (A-1) versus 106 mm (A-2) for extra reach around frame profiles. DXL-B moves to an aluminum-alloy base and slide, adds a plastic ball knob for grip and a Ø15 mm rear release hole, and offers three mounting-plate widths (326 mm on B-1/B-2, 305/284 mm on B-3) to line up with existing fence-frame hole patterns without field drilling.
How much door-to-frame gap can the bolt tolerate?
The mechanism is rated for gaps of 1 to 10 mm, which absorbs typical fabrication and installation scatter on welded or aluminum-profile fence gates. The bolt travel is 48 mm; check that this stroke covers the engagement your gate geometry requires before ordering.
Can the DXL be opened from inside the cell?
DXL-B variants include a Ø15 mm rear release hole as an inside-release provision. Whether that satisfies your trapped-person requirement depends on the risk assessment — for controller-supervised release, combine the bolt with a solenoid-locking switch that has its own rear unlock option, such as the DX-W2 with the DX-W2-L kit.
Does the DXL itself carry a holding-force rating?
No holding-force figure against forced opening is published for the bolt mechanism — its published data covers gap range, travel and the 1,000,000-operation mechanical life. Where the specification demands a quantified resistance figure, use a solenoid guard lock (DX-W2/W3/W5, 1300 N) as the holding element and treat the DXL as door hardware. One catalog note: the bolt family also appears under the DXSL marking in some brochure pages — same product line.
How do I order, and can the switch come pre-matched?
Specify the variant (DXL-A-1, A-2, B-1, B-2 or B-3) per gate, and if you want the bolt-plus-interlock combination, add the DX switch model on the same order — the factory supplies the pair that fits the pre-drilled pattern. Small trial quantities are generally workable; contact the factory for current MOQ, pricing and lead time.
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Specs reviewed by Engineer Cai, Senior Application Engineer. See certificates.
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