Airtac BSED Clamping Double Acting Cylinder BSED125X450S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X450S combines a double-rod ISO 15552 cylinder — a Ø32mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 8600 N in either direction if air is lost. Ø125mm bore, 450mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke450 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac BSED Clamping Double Acting Cylinder BSED125X450S
The AirTAC BSED125X450S is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A Ø32 mm rod exits both ends, delivering equal force in both directions—about 5734 N each way at 0.5 MPa. The fail-safe collet mechanism provides an 8600 N static holding force without requiring live air.
Because the rear rod extends out the back, it can carry a flag or cam for external tracking while resisting rotational torque. The lock engages bidirectionally via a dedicated G1/8 release port, operating at 0.15-0.7 MPa. This 125 mm bore unit includes a -S magnet for CMSE or DMSE sensors and utilizes adjustable air cushions at both ends to absorb kinetic energy.
Double Rod + 8600 N Rod Lock (Ø125mm)
A rod exits both ends for symmetric force and back-rod tooling, and a spring clamps the collet so the Airtac BSED Clamping Double Acting Cylinder BSED125X450S holds its position in both directions on air loss or E-stop. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage only after the rod has stopped (not a dynamic brake), and release only when both piston sides are pressure-balanced; allow ≥0.5 s for full release.
Airtac BSED Clamping Double Acting Cylinder BSED125X450S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X450S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 450 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| Lock-release port | G1/8 |
| Configuration | Double rod, double acting |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Unlocking pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M27×2 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø125mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 5734 N |
| 0.7 MPa (max) | 8027 N |
| Max drive (@0.7 MPa) | 819 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 8600 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED125X450S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×450 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSED): Basic, LB, FA, TC. Related: SED (double rod, no lock), BSE (single-rod rod lock). Sensors CMSE/DMSE fit magnetic BSED.
Where the Airtac BSED Clamping Double Acting Cylinder BSED125X450S Is Used
Heavy Vertical Lifts
Holds a massive vertical platen steady at 8600 N during an E-stop, while the 8028 N both-way drive force raises and lowers the mass smoothly.
Multi-Station Machining
Uses the rear exiting rod to mount a cam for tooling confirmation, locking the 819 kgf max drive load rigidly during part machining.
Pallet Indexing Stop
Provides symmetric stopping force in both directions on a heavy-duty conveyor, engaging the fail-safe collet to hold heavy pallets during loading.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X450S the Right Cylinder?
Choose this 450 mm stroke model when a heavy load demands both symmetric thrust and fail-safe positioning. Verify your static load does not exceed the 8600 N holding capacity. If you need less force, the neighboring 100 mm bore provides 3681 N at 0.5 MPa and a 5500 N hold; stepping up is not possible as 125 mm is the largest standard size. For any stroke at or above 300 mm, always use external guide rails to prevent side-load wear on the seals.
Engage the lock only after the rod completely stops, and release it only when piston sides are pressure-balanced, allowing at least 0.5 seconds for the transition. To replace this unit, match the 125 mm bore, 450 mm stroke, PT1/2 cylinder port, and -S magnet option. Mounting options are limited to Basic, LB, FA, and TC.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 8600 N?
- ✓ Back-rod space for tooling/flag
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not a dynamic brake.
- check Release only when both piston sides are pressure-balanced.
- check Allow ≥0.5 s for full release before commanding motion.
- check Feed the G1/8 release port with 0.15–0.7 MPa clean air.
- check Support both rod ends; avoid side load.
- check Use BSED mounting (Basic/LB/FA/TC).
Airtac BSED Clamping Double Acting Cylinder BSED125X450S FAQ
The drive force is equal both ways at 5734 N @0.5 MPa and 8028 N @0.7 MPa (max 819 kgf). The separate static holding force of the spring-applied rod lock is 8600 N, which holds the load securely with no live air.
If air is lost or an E-stop trips, the spring-applied collet instantly clamps the rod, engaging the 8600 N bidirectional hold. It is a static lock, not a dynamic brake, so it must only engage after the rod stops. To release, restore pressure to the G1/8 port and allow at least 0.5 seconds.
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Standard models are processed and dispatched in 3-5 business days.
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